View TEA1716T_8333219.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1. general description the TEA1716T integrates a power factor corrector (pfc) controller and a controller for a half-bridge resonant converter (h bc) in a multi-chip ic. it provides the drive function for the discrete mosfet in an up-converter and for the two discrete power mosfets in a resonant half-bridge configuration. efficient pfc operation is achieved by impl ementing functions for quasi-resonant (qr) operation at high-power levels and qr operation with valley skipping at lower power levels. overcurrent protection (ocp), overvoltage protection (ovp) and demagnetization sensing ensure safe operation under all conditions. the hbc module is a high-voltage controlle r for a zero-voltage switching llc resonant converter. it contains a high-voltage level shift circuit and several protection circuits including ocp, open-loop protection, capaciti ve mode protection and a general purpose latched protection input. the high-voltage chip is fabr icated using a proprietary high -voltage bipolar-cmos-dmos power logic process enabling efficient direct start-up from the rectified universal mains voltage. the low-voltage silicon -on-insulator (soi) chip is used for accurate, high-speed protection functions and control. TEA1716T controlled pfc circuit and resonant co nverter are very flexible. it can be used for a broad range of applications over a wide mains voltage range. combining pfc and hbc controllers in a single ic makes the t ea1716t ideal for contro lling power su pplies in lcd and plasma televisions. using the TEA1716T highly efficient and reli able power supplies providing from 90 w to 500 w can be designed easily using the TEA1716T, with a minimum of external components. the integrated burst mode and power management functionality of TEA1716T enable resonant applications that meet the ener gy using product directive (eup) lot 6 (< 0.5 w in standby mode). remark: unless otherwise stated, all values are typical. TEA1716T resonant power supply control ic with pfc rev. 3 ? 30 november 2012 product data sheet
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 2 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 2. features and benefits 2.1 general features ? integrated pfc and hbc controllers ? universal mains supply operat ion from 70 v to 276 v (ac) ? high level of integration resulting in a low external component count and a cost effective design ? integrated burst mode sensing ? compliant with energy using pr oduct directive (eup) lot 6 ? enable input to enable only the pfc or both the pfc and hbc controllers ? on-chip high-voltage start-up source ? stand-alone operation or ic supplied from external dc source 2.2 pfc controller features ? boundary mode operation with on-time control ? valley/zero-voltage switching for minimum switching losses ? frequency limiting to reduce switching losses ? accurate boost voltage regulation ? burst mode switching with soft-start and soft stop 2.3 hbc controller features ? integrated high-voltage level shifter ? adjustable minimum and maximum frequency ? maximum 500 khz half-bri dge switching frequency ? adaptive non-overlap time ? burst mode switching 2.4 protection features ? safe restart mode for system fault conditions ? general latched protection input for output overvoltage protection or external temperature protection ? protection timer for time-out and restart ? overtemperature protection ? soft (re)start for both controllers ? undervoltage protection for mains (brownout), boost, ic supply and output voltage ? overcurrent regulation and protection for both controllers ? accurate overvoltage protection for the boost voltage ? capacitive mode protecti on for the hbc controller
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 3 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 3. applications ? lcd television ? plasma television ? notebook adapter ? desktop and all-in-one pcs 4. ordering information table 1. ordering information type number package name description version TEA1716T/2 so24 plastic small outline packa ge; 24 leads; body width 7.5 mm sot137-1
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 4 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 5. block diagram fig 1. TEA1716T block diagram

! ! "
!
# ! ! $ %# & '( ) * '+ + ' , - ( +- . +( '- +' ') '/ '0 ', 1 / ! '1 ! ++ 2 &'31-
&-3/
&'3,/
'3,/
&+3-
&03/
03/
(3'
13+
*3(

#
!

%#

45678 49
:7456 !
; ! !
&++2',
&+0
&+3/
&'/

&03(
&130
&-30
&+3-
&'3*
&130
&/3*
&-3+
&+3*-
&'03-
&'03)

! " # ! 03'
&03(/
!
# %#
!

!

2 &+
&'
&03/

&'3'/

! ! ! +3/
+0 -3/
854<
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 5 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 6. pinning information 6.1 pinning 6.2 pin description fig 2. TEA1716T pin configuration table 2. pin description symbol pin description comppfc 1 pfc controller frequency compensation; externally connected to filter snsmains 2 mains voltage sense input; exter nally connected to resistive divided mains voltage snsauxpfc 3 pfc demagnetization timing sense in put; externally connected to auxiliary winding of pfc snscurpfc 4 pfc controller sense input for momentary current and soft-start; externally connected to current sense resistor and soft-start filter snsout 5 sense input for moni toring the hbc output voltage; externally connected to the auxiliary winding supic 6 supic input low-voltage and output of internal hv start-up source; externally connected to auxiliary winding of hbc or to external dc supply gatepfc 7 pfc mosfet gate driver output pgnd 8 power ground; hbc low-side and pfc driver reference (ground) supreg 9 regulated supreg ic supply; intern al regulator output; input for drivers; externally connected to supreg buffer capacitor gatels 10 hbc low-side mosfet gate driver output n.c. 11 not connected; high-voltage spacer. suphv 12 internal hv start-up source source high-voltage supply input; externally connected to boost voltage gatehs 13 hbc high-side mosfet gate driver output suphs 14 high-side driver supply input; externally connected to bootstrap capacitor (c suphs )
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 6 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7. functional description 7.1 overview of ic modules the functionality of the TEA1716T can be grouped as follows: ? supply module: supply management for the ic. includes the restart and (latched) shutdown states ? protection and restart timer: an externally adjustable timer used for delayed protection and restart timing ? enable input: control input for enabling and disabling the controllers; when disabled has very low current consumption ? pfc controller: controls and protects the power factor (pf) converter. generates a 400 v (dc) boost voltage from the rectified ac mains input with a high pf ? hbc controller: controls and protects the resonant conver ter; generates a regulated mains isolated output voltage from the 400 v (dc) boost voltage ? burst input: control input for burst mode operation; activates the burst stop state in which the current consumption is low figure 1 shows the block diagram of the TEA1716T. a typical application is illustrated in figure 17 . hb 15 reference for high-side driver and input for half-bridge slope detection; externally connected to half-bri dge node hb between hbc mosfets (see figure 17 ) n.c. 16 not connected; high-voltage spacer snscurhbc 17 momentary hbc current sense i nput; externally connected to resonant current sense resistor sgnd 18 signal ground and ic reference (ground) cfmin 19 hbc minimum frequency setting; externally connected to capacitor snsburst 20 burst stop activation sense input; externally connected to resistive divided snsfb voltage snsfb 21 output voltage regulation feedback sense input; externally connected to optocoupler and pull-up resistor sshbc/en 22 hbc soft-start timing of hbc a nd ic enable input; enables pfc or pfc only or both pfc and hbc controllers; externally connected to soft-start capacitor and enable pull-down signal rcprot 23 protection timer setting for time-out and restart; externally connected to resistor and capacitor snsboost 24 sense input for boost voltage regulat ion; externally connected to resistive divided boost voltage table 2. pin description ?continued symbol pin description
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 7 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.2 power supply the TEA1716T contains several supply-r elated pins supic, supreg, suphs and suphv. these pins are described in section 7.2.1 to section 7.2.4 . 7.2.1 low-voltage supply input (supic pin) the supic pin is the main low-voltage supply input to the ic. all internal circuits are supplied from this pin directly or indirect ly using the supreg pin. the high-voltage circuit, however, is not supplied from the supic pin. the supic pin is connected externally to a buffer capacitor c supic . this buffer capacitor ca n be charged in several ways: ? from the internal high-voltage start-up source ? from the hbc transformer auxiliary winding ? from the e switching half-bridge node capacitive supply ? from an external dc supply, for example, a standby supply the ic starts operating when the voltage on the supic pin reaches the start level, provided the voltage on the supreg pin has also reached the start level. the start level depends on the condition of the suphv pin: ? high voltage present on the suphv pin (v suphv >v det(suphv) ). in a stand-alone application this is the case because c supic is initially charged from the hv start-up source . the start level is v start(hvd)(supic) (20 v). the wide difference between the start and stop (v uvp(supic) ) levels allows suffici ent energy to be drawn from the supic buffer capacitor until the output voltage stabilizes. ? not connected or no voltage present at suphv (v suphv TEA1716T is supplied from an external dc source, this is the case. the start level is v start(nohvd)(supic) (15 v). the ic is supplie d from the dc supply during start-up. to minimize power dissipation the dc supply to the supic pin must be higher than, but close to v uvp(supic) (13 v). the ic stops operating when v supic TEA1716T operating states are described in section 7.3 . ? disabled ic state when the ic is disabled using the sshbc/en pin, the current consumption (i dism(supic) ) is very low. ? supic charge, supreg charge, thermal hold, restart and protection shutdown states only a small section of t he ic is active while c supic and c supreg are charging during a restart sequence before start-up or during shutdown after a protection function has been activated. the pfc and hbc controlle rs are disabled. curr ent consumption is limited to i protm(supic) .
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 8 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc ? boost charge state the pfc controller is switching; the hbc controller is off. the current from the high-voltage start-up source is large enough to supply the supic pin (current consumption < i ch(nom)(supic) ). ? operational supply state both the pfc and hbc controllers are switching. current consumption is i oper(supic) . when the hbc controller is enabled, the sw itching frequency is high initially and the hbc mosfet drivers current consumption is dominant. the stored energy in c supic supplies the initial supic current before the supic supply source takes over. ? burst stop mode only a small section of th e ic is active while c supreg is kept charged and the sensing of the snsburst input is active. the pfc and hbc controllers are stopped. current consumption is limited to i burstm(supic) . the supic pin has a low short circuit detection voltage (v scp(supic) = 0.65 v). the current dissipated in the hv start- up source is limited while v supic < v scp(supic) (see section 7.2.4 ). 7.2.2 regulated supply (supreg pin) the voltage range on the supic pin exceeds that of the external mosfets gate voltages. the TEA1716T contains an integrated series stab ilizer. the series stabilizer creates an accurate regulated voltage (v reg(supreg) = 11.3 v) at the buffer capacitor c supreg . this stabilized voltage is used to: ? supply the internal pfc driver ? supply the internal low-side hbc driver ? supply the internal high-side driver using external components ? as a reference voltage for optional external circuits the supreg series stabilizer is enabled after c supic has been fully charged. enabling the stabilizer after charging ens ures that any optional exte rnal circuitry connected to supreg does not dissipate any of the start-up current. to ensure that the external mosfets receive su fficient gate drive current, the voltage on the supreg pin must reach vs tart(supreg). in addition, th e voltage on the supic pin must reach the start level. the ic starts op erating when both voltages reach their start levels. supreg is provided with undervol tage protection (uvp-supreg; see section 7.9 ). when v supreg TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 9 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.2.3 high-side driver floating supply (suphs pin) the high-side driver is supplied by an external bootstrap buffer capacitor, c suphs . the bootstrap capacitor is connected between the high-side reference, the hb pin, and the high-side driver supply input the suphs pin. c suphs is charged from the supreg pin using an external diode d suphs . careful selection of the appropriate diode minimizes the voltage drop between supreg and suphs, especially when large mosfets and high switching frequencies are used. 7.2.4 high-voltage supply input (suphv pin) in a stand-alone power supply application, the suphv pin is connected to the boost voltage. the hv start-up source (which de livers a constant current from suphv to supic) charges c supic and c supreg using this pin. short circuit protection on the supic pin (scp-supic; see section 7.9 ) limits dissipation in the hv start-up source when supic is sh orted to ground. scp-supic limits the current on suphv to i red(suphv) when the voltage on supic is less than v scp(supic) . under normal operating conditions, th e voltage on the supic pin exceeds v scp(supic) very quickly after start-up and the hv start-up source switches to i nom(suphv) . during start-up and restart, the hv start-up source charges c supic and regulates the voltage on supic using hysteretic control. the start level has a small amount of hysteresis v start(hys)(supic) . the hv start-up source switches off when v supic exceeds the start level v start(hvd)(supic) . current consumption through the suphv pin (i tko(suphv) ) is low. once start-up is complete and the hbc controlle r is operating, supic is supplied from the hbc transformer auxiliary winding. in this operational state, the hv start-up source is disabled. 7.3 flow diagram the operation of the TEA1716T can be divided into a number of states - see figure 3 . the abbreviations used in figure 3 are explained in ta b l e 8 .
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 10 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc fig 3. flow diagram of the TEA1716T
# 77
88
=667
>
9
=667
>
? ! !
7 97?
@94a7
7@
b :b9
4:b 94a7

>
?
! 95=5
8=9:b947b?
4:b
>
9

b4b=6
=:
9

>
9
>
?
<67494b9
87
445
?5a7 4:b9
' 4:b9
+ 333 !4a7
b 5
4
9b
5 9b9 :9b9
' 4: :9b9
+ 4:

b4b=6
=:
9
b4a7c
9

>
9
>
?
>
?

b4b=6
=:
9
b4a7c
9
9
ab
>
9
49 94a7
7
>
?
ab
>
?

>
?
>
?

>
?
#
b4a7c
9
9
9
=b6=b
>
? b :b9
b5 64
d '

b4b=6
=:
9 b4b
b5
9

ab
>
?

>
?

>
?
>
?
ab
>
?
94a7

>
9 =b
b6
>
? 94a7

>
9 :9b9 9 b4b
:49
a
9b 85
49?
b4b
9

b=
! 49
b
>
? b4b
b5
64 d ' b :b9
b5

4:b4b
a?e
=b6=b

>
?

>
?
>
? =b
b6
>
9
b4a7c
9
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 11 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.4 enable input (sshbc/en pin) the power supply applicat ion is disabled by pulling the sshbc/en pin low. figure 4 shows the internal functionality. when a voltage is present on the suphv pin or on the supic pin, a current i pu(en) (42 ? a) flows from the sshbc/en pin. if the pin is not pulled down, the current increases the voltage up to v pu(en) (3 v). since the voltage is above both v en(pfc)(en) (1.2 v) and v en(ic)(en) (2.2 v), the ic is enabled. the ic is disabled when the voltage on the sshbc/en pin is pulled down under both v en(pfc)(en) and v en(ic)(en) via an optocoupler. the optocoupler is driven from the hbc transformer second ary side (see figure 4 ). the pfc controlle r stops switching immediately, but the hbc controller continues s witching until the low-side stroke is active. it is also possible to control the voltage on the sshbc/en pin from another circuit on the secondary side via a diode. the external pull-down current must be larger than the internal soft-start charge current i ss(hf)(sshbc) . if the voltage on the sshbc/en pin is pulled down under v en(ic)(en) , but not under v en(pfc)(en) , only the hbc is disabled. this f eature is useful when another power converter is connected to the pfc boost voltage. the low-side power switch of the hbc is on when the hbc is disabled using the sshbc/en pin. table 3. operating states state description no supply supply voltages on supic and suphv are too low to provide any functionality. undervoltage protection (uvp-supplies; see section 7.9 ) is active when v suphv TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 12 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.5 ic protection 7.5.1 ic restart and shutdown in addition to the protection functions infl uencing the pfc and hbc controller operation, several protection functions are provided to disable both controllers. see the protection overview in section 7.9 for details on which protection functions trigger a restart or protection shutdown. ? restart when the TEA1716T enters the restart state, the pfc and hbc controllers are switched off. after a period defined by the re start timer, the ic automatically restarts following the normal start-up cycle. ? protection shutdown when the TEA1716T enters the protecti on shutdown state, the pfc and hbc controllers are switched off. the protection shutdown state is latched, so the ic does not automatically start up again. it can be restarted by resetting the protection shutdown state in one of the following ways: ? lowering v supic and v suphv below their respective reset levels, v rst(supic) and v rst(suphv) ? using a fast shutdown reset (see section 7.5.3 ). ? using the enable pin (see section 7.4 ) ? thermal hold in the thermal hold state, the pfc and hbc controllers are switched off. the thermal hold state remains active until the ic junction temperature drops to approximately 10 ? c below t otp (see section 7.5.6 ). fig 4. circuit configuration around the sshbc/en pin 9fgfg 9fgfg 2 94a7
=667? 947
f0
b
h
+
g !4a7
=667? fg
8 b
b 4 b ::=b 7 6=fg 6=fg 94a7
b :b9 94a7 : 94a7 :8:
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 13 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.5.2 protection and restart timer the TEA1716T contains a programmable timer which can be used for timing several protection functions. the timer can be used in two ways as a protection timer and as a restart timer. the timing of the timers is set independently using an external resistor r prot and capacitor c prot connected to the rcprot pin. 7.5.2.1 protection timer certain error conditions are allowed to persist for a time period before protective action is must be taken. the protection timer defines the protection period (how long the error can persist before the protection function is trig gered). the protection functions that use the protection timer aree found in the protection overview in section 7.9 . figure 5 shows the operation of the protection ti mer. when an error condition occurs, a fixed current i ch(slow)(rcprot) (100 ? a) flows from the rcprot pin and charges c prot . r prot causes the voltage to increase exponentiall y. the protection time elapses when the voltage on the rcprot pin reaches the upper switching level v u(rcprot) (4 v). when the protection time has elapsed, the appropr iate protective action is taken and c prot is discharged. if the error condition is removed before the voltage on the rcprot pin reaches v u(rcprot) , c prot is discharged using r prot and no action is taken. an external circuit to force a restart can increase the rcprot voltage to exceed v u(rcprot) . 7.5.2.2 restart timer the ic must be disabled for a time period on certain error conditions. particularly when the error condition causes components to overhea t. in such cases, the ic is disabled to allow the power supply to cool down, before restarting automatically. the restart timer determines the restart ti me. the restart timer is active in the restart state. the protection functions which trigger a restart are found in the protection overview in section 7.9 . fig 5. operation of the protection timer passed 0 0 none present short error long error repetative error v u(rcprot) i ch(slow)(rcprot) i rcprot error v rcprot t protection time 014aaa853
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 14 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc figure 6 shows the operation of the restart timer. normally c prot is discharged to 0 v. when a restart is requested, c prot is quickly charged to the upper switching level v u(rcprot) . then the rcprot pin becomes high ohmic and c prot discharges through r prot . the restart time has elapsed when v rcprot reaches the lower switching level v l(rcprot) (0.5 v). the ic restarts and c prot is discharged. 7.5.3 fast shutdown reset (snsmains pin) the latched protection shutdown state is reset when v supic and v suphv drop below their respective reset levels, v rst(supic) and v rst(suphv) . typically, the pfc boost capacitor, c boost , must discharge before v supic and v suphv drop below their reset levels. discharging c boost can take a long time. fast shutdown reset causes a faster reset. when the mains supply is interrupted, the voltage on the snsmains pin falls. when v snsmains falls below v rst(snsmains) and then increases again by a hysteresis value, the ic leaves the protection shutdown state. the boost capacitor c boost does not require discharging to trigger a new start-up. the protection shutdown state can also be ended by pulling do wn the enable input (the sshbc/en pin). 7.5.4 output overvoltage protection (snsout pin) the TEA1716T outputs are provided with overvoltage protection ( ovp-output; see section 7.9 ) . the output voltage is measured usin g the resonant transformer auxiliary winding. the voltage is sensed on the sn sout pin using an external rectifier and resistive divider. an overvoltage is de tected when the snsout voltage exceeds v ovp(snsout) (3.5 v). when an overvoltage is detected, the TEA1716T enters the protection shutdown state. additional external protection circuits, such as an external otp circuit, can be connected to this pin. connect them to the snsout pin using a diode to ensure that an error condition triggers an ovp event. 7.5.5 output failed start protection, fsp-output (snsout pin) the TEA1716T outputs are provided with failed start protection (fsp output; see section 7.9 ). during start-up, the output voltage is less than v fsp(snsout) for a time. this voltage drop is not considered an error condition if it does not last longer than expected. the protection timer is started when v snsout TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 15 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc under normal conditions, the output voltage is present before the protection time is expired and no protective action is taken. t he restart state is activated if the fsp output event is still active when the protection time has expired. 7.5.6 overtemperature protection (otp) accurate internal overtemperature protecti on is provided in the TEA1716T. when the junction temperature exceeds the overtemperature protection activation temperature, t otp (t otp =150 ? c), the ic enters the thermal hold state. the TEA1716T exits the thermal hold state when the temperature falls again to approximately totp ? 10 ? c. 7.6 burst mode operation (snsburst pin) the hbc and pfc controllers can be operated in burst mode. in burst mode, the controllers are on for a period, then off for a period. burst mode operation increases efficiency under low-load conditions. the voltage on the snsburst pin defines the transition from operational supply state (= burst-on period) to burst stop state (= burst-off period) and back). the voltage on the snsfb pin represents th e level of power that is converted. the voltage on the snsburst pin can be related to the snsfb pin using an external resistor divider. the snsburst pin has an internal switching level v burst(snsburst) (3.5 v) and a fixed hysteresis v burst(hys)(snsburst) (24 mv). in addition, a swit ched current flowing into the snsburst pin, i burst(hys)(snsburst) (3 ? a) and the resistance of the external divider determine the effective hysteresis. the current flows when the snsburst voltage is less than v burst(snsburst) . the pfc and hbc controller operation is suspended when the voltage on the snsburst pin falls under v burst(snsburst) . the pfc continues as long as the boost voltage is still below the regula tion level. then it stops with a soft-stop. the hbc stops almost directly when the gatels pin become s active. the burst stop state is entered when both pfc and hbc have stopped switching. in the burst stop state, the current consumption of the ic is low an d the snsout pin is pulled low. the snsout signal can be used for additional functionality in the application. when the voltage on snsburst increases to exceed v burst(snsburst) +v burst(hys)(snsburst) , the TEA1716T leaves the burst stop state and enters the operational supply state. the pf c starts its operation with a soft-start. the hbc resumes without a soft-start sequence. burst mode operation is not enabled until the snsout pin has reached the v fsp(snsout) level once to avoid unwanted activation of the burst mode during start-up. 7.7 pfc controller the pfc controller converts the rectified un iversal mains voltage into an accurately regulated boost voltage of 400 v (dc). it operates in quasi-resonant (qr) mode or discontinuous conducting mode (dcm) a nd is controlled using an on-time control system. the resulting mains harmonic current emissions of a typical application can meet the class-d mhr requirements.
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 16 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the pfc controller uses valley switching to mi nimize losses. a primary stroke is only started once the previous secondary stro ke ends and the voltage across the pfc mosfet reaches a minimum value. 7.7.1 pfc gate driver (gatepfc pin) the circuit driving the gate of the power mosf et has a high current sourcing capability i source(gatepfc) of 0.6 a. it also has a high current sink capability i sink(gatepfc) of 1.2 a. the source and sink capabilities enable fast switch-on and switch-off to ensure efficient operation. the driver is supplied from the regulated supreg supply. 7.7.2 pfc on-time control the pfc operates under on-time control. the following determine the pfc mosfet on-time: ? the error amplifier and the loop compensation using the voltage on the comppfc pin at v ton(comppfc)zero (3.5 v), the on-time is reduced to zero. at v ton(comppfc)max the on-time is at a maximum ? mains compensation using the voltage on the snsmains pin 7.7.2.1 pfc error amplifier (comppfc and snsboost pins) the boost voltage is divided using a high-ohmic resistive divider. it is supplied to the snsboost pin. the transconductance error amplifier, which compares the snsboost voltage with an accurate trimmed reference voltage v reg(snsboost) , is connected to this pin. the external loop compensation network on the comppfc pin filters the output current. in a typical application, a resistor and two capacitors set the regulation loop bandwidth. the transconductance of the error amplifier is not constant, which improves the start-up behavior and transient response. the transc onductance significantly increases when the snsboost voltage is more than 80 mv above or below the reference voltage. the result is a higher output current to the comppfc pin. figure 7 shows the behavior of the transconductance amplifier.
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 17 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the comppfc voltage is clamped at a maximum of v clamp(comppfc) . this clamp avoids a long recovery time if the boost voltage exceeds the regulation level for a period. 7.7.2.2 pfc mains compensation (snsmains pin) the mathematical equation for the transfer fu nction of a power factor corrector contains the square of the mains inpu t voltage. in a typical application, this results in a low bandwidth for low mains input voltages. at high mains input voltages the mhr requirements are hard to meet. the TEA1716T contains a correction circuit to compensate for this effect. the average mains voltage is measured using the snsmains pin. the information is supplied to an internal compensation circuit. figure 8 shows the relationship between the sn smains voltage, the comppfc voltage, and the on-time. it is possible to keep the regulation loop bandwidth constant over the full mains input range using this compensation. this feature provides a fast transient response on load steps, while still meeting the class-d mhr requirements. fig 7. transconductance of the pfc error amplifier ++ 3 /- &)0 &(0 i
88 bf5g (0 0 )0
fg 10
2 '31
5 2 '31
5 2 i
10
5

TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 18 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.7.3 pfc demagnetization sensing (snsauxpfc pin) the voltage on the snsauxpfc pin is used to detect transfor mer demagnetization. during the secondary stroke, the transformer is magnetized and current flows in the boost output. during this time, v snsauxpfc v demag(snsauxpfc) and valley detection is started. the mosfet remains off. to ensure that switching continues under a ll circumstances, the mosfet is forced to switch on if the magnetizing of the transformer (v snsauxpfc TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 19 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the valley sensing block con nected to the snsauxpfc pin detects the valleys. this block measures the pfc transformer auxiliary winding voltage, which is a reduced and inverted copy of the mosfet drain voltage. when a valley of the drain voltage (= top at snsauxpfc voltage) is detected, the mosfet is switched on. if a top is not detected on the snsauxpfc pin (= a valley at the drain) within t to(vrec) (4 ? s) after demagnetization is detected, the mosfet is forced to switch on. 7.7.5 pfc frequency and off-time limiting the switching frequency is limited to f max(pfc) for transformer optimization and to minimize switching losses. if the frequency for quasi-resonant operation exceeds f max(pfc) , the system switches to dcm. th e pfc mosfet is switched on when the drain-source voltage is at a minimu m (valley switching). the minimum off-time is limited at t off(pfc)min to ensure correct control of the pfc mosfet under all circumstances. 7.7.6 pfc soft-start and soft-stop (snscurpfc pin) the pfc controller features a soft-start fu nction. the function slowly increases the primary peak current during start-up. the soft-stop function slowly decreases the transformer peak current before operati ons are halted. these functions prevent transformer rattle at start-up or during burst mode operation. fig 9. demagnetization and valley detection demagnetized v rect /n v rect v boost (v boost - v rect )/n v demag(snsauxpfc) 0 0 magnetized demagnetization l tpfc aux(pfc) dr(pfc) gatepfc valley (= top for detection) 0 off on t 014aaa856
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 20 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc connecting a resistor r ss(pfc) and capacitor c ss(pfc) between the snscurpfc pin and the current sense resistor r cur(pfc) achieves this. during start-up, an internal current source, i ch(ss)(pfc) , charges the capacitor to v snscurpfc =i ch(ss)(pfc) ? r ss(pfc) . the voltage is limited to the maximum pfc soft-start clamp voltage, v clamp(ss)pfc . the additional voltage across the charged capacitor reduces the peak current. after start-up, the internal current source is switched-off, capacitor c ss(pfc) discharges across r ss(pfc) and the peak current increases. the start level and the time constant of the rising primary current can be adjusted externally by changing the values of r ss(pfc) and c ss(pfc) . switching on the internal current source i ch(ss)(pfc) starts a soft-stop. i ch(ss)(pfc) charges c ss(pfc) . the increasing capacitor voltage decreases the peak current. the charge current flows when the voltage on the snscurpfc pin is less than the maximum pfc soft-start voltage (0.5 v). if v snscurpfc exceeds the maximum pfc soft-start voltage, the soft-start current source starts limiting the charge current. to determine accurately if the capacitor is charged, the voltage is only measured during the pfc power switch off-time. the pfc operation is stopped when v snscurpfc >v stop(ss)(pfc) . in the burst stop state with the pfc not op erating, the snscurpfc pin is kept at the maximum pfc soft-start voltage, enabling an immediate start of the soft-start sequence when the pfc must operate after the burst stop state. 7.7.7 pfc overcurrent regulation, ocr-pfc (snscurpfc pin) the maximum peak current is limited cycle-by-c ycle by sensing the voltage across an external sense resistor (r cur(pfc) ) connected to the source of the external mosfet. the voltage is measured via the snscurpfc pin and is limited to v ocr(pfc) . a voltage peak appears on v snscurpfc when the pfc mosfet is switched on due to the discharging of the drain capacitance. the leading-edge blanking time (t leb(pfc) ) ensures that the overcurrent sensing block does not react to this transitory peak. 7.7.8 pfc mains undervoltage protection/brownout protection, uvp-mains (snsmains pin) the voltage on the snsmains pin is continuo usly sensed to prevent the pfc trying to operate at very low mains input vo ltages. pfc switching stops when v snsmains TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 21 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.7.9 pfc boost overvoltage protection, ovp-boost (snsboost pin) an overvoltage protection circuit has been built in to prevent boost overvoltage during load steps and mains transients. switching of the pow er factor correction circuit is inhibited when the voltage on the snsboost pin > v ovp(snsboost) . pfc switching resumes when v snsboost v start(snsboost).
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 22 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.8.3 hbc switch control hbc switch control determines when the mosfets switch on and off. it uses the output from several other blocks. ? a divider is used for alternate switching of the high and low-side mosfets for each oscillator cycle. the oscillator frequenc y is twice the half -bridge frequency. ? the controlled oscilla tor determines the switch-off point. ? adaptive non-overlap time sensing determin es the switch-on point. this function is the adaptive non-overlap time. ? several protection circuits and the stat e of the sshbc/en input specify if the resonant converter is a llowed to start switching. ? at start-up pin gatels is high. node hb is pulled to ground and the bootstrap capacitor c suphs is charged. ? during the burst off-time, both gatels and gatehs are low. the disabled mosfets prevent the discha rge of the resonant tank. figure 10 provides an overview of typical switching behavior. 7.8.4 hbc adaptive non-overlap (ano) time function (hb pin) 7.8.4.1 inductive mode (normal operation) the high efficiency characteristic of a resona nt converter is the result of zero-voltage switching (zvs) of the power mosfets. zvs is also called soft switching. to allow soft switching, a small non-overlap time is re quired between the high-side on-times and low-side mosfets. during this non-overlap ti me, the primary resonant current charges or discharges the half-bridge capacitance between ground and the boost voltage. fig 10. switching behavior of the hbc gatels gatehs hb i tr(hbc) cfmin t v boost 0 0 014aaa857
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 23 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc after the charge or discharge cycles, the body diode of the mosfet starts conducting. because the voltage across the mosfet is ze ro, there are no switching losses when the mosfet is switched on. this operating mode is called inductive mode. in inductive mode the switching frequency is above the resonan ce frequency and the resonant tank has an inductive impedance. the hb transition time depends on resonant current amplitude when switching starts. there is a complex relationship between this amplitude, the frequency, the boost voltage and the output voltage. ideally, the ic switch es on the mosfet when the hb transition is complete. if it waits any longer, the hp volt age can swing back, espec ially at high output loads. the advanced adaptive non-overlap time makes it unnecessary to choose a fixed dead time (which is always a compromi se). this saves on external components. adaptive non-overlap time sensing measures the hb slope after one mosfet has been switched off. norma lly, the hb slope starts immediately (t he voltage starts ri sing or falling). once the transition at the hb node is complete, the slope ends (the voltage stops rising/falling). this slope end is detected by the ano time sensor and the other mosfet is switched on. in this way, the non-overlap time is automatically optimized even when the hb transition cannot be fully co mpleted, which minimizes losses. figure 11 illustrates the operation of the adaptive non-ov erlap time function in inductive mode. the non-overlap time depends on the hb slope but it has upper and lower limits. an integrated minimum non-overlap time (t no(min) ) prevents cross conduction occurring under any circumstances. the maximum non-overlap time is limited to the oscillator char ge time. if the hb slope is longer than the oscillator charge time ( 1 4 of hb switching period), the mosfet is forced to switch on. in this case, the mosfet is not soft switching. this limitation ensures that, the mosfet on-time is at least 1 4 of the hb switching period. fig 11. adaptive non-overlap time function (normal inductive operation) fast hb slope v boost hb gatels gatehs 0 slow hb slope incomplete hb slope t 014aaa858
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 24 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.8.4.2 capacitive mode the statements in section 7.8.4.1 are true for normal operation with a switching frequency higher than the resonance frequency. when an error condition occurs (for example output short, load pulse too high) the switching frequency is lower than the resonance frequency. the resonant tank then has a capacitive impedance. in capacitive mode, the hb slope does not start after the mosfet switches off. switching on the other mosfet is not recommended in this situation. the absence of soft switching increa ses dissipation in the mosfets. in capacitive mode, the body diode in the switched off mosfet can start conducting. switching on the other mosfet at this instant can result in the immediate destruction of the mosfets. the advanced adaptive non-overlap time of the TEA1716T always waits until the slope at the half-bridge node starts. it guarantees safe switching of the mosfets in all circumstances. figure 12 shows the adaptive non-overlap time function operation in capacitive mode. in capacitive mode, half the resonance peri od can elapse before the resonant current changes back to the correct polarity and starts charging the half-bridge node. the oscillator is slowed down until the half-bridge slope starts to allow this relatively long waiting time. see section 7.8.5 for more details on the oscillator. the mosfet is forced to switch on when the half-bridge slope fails to start and the oscillator voltage reaches v u(cfmin) . the switching frequency is increased to eliminate the problems associated with capacitive mode operation (see section 7.8.11 ). fig 12. adaptive non-overlap time function (capacitive operation) 0 t 014aaa939 delayed oscillator delayed switch-on during capacitive mode no hb slope wrong polarity gatehs gatels 0 v boost hb 0 0 0 i tr(hbc) cfmin
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 25 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.8.5 hbc slope controlled oscillator (pin cfmin) the slope-controlle d oscillator determines the half-bridge switching fr equency. the oscillator generates a triang ular waveform between v u(cfmin) and v l(cfmin) at the external capacitor c fmin . figure 13 shows how the frequency is determined. two external components determine the frequency range: ? capacitor c fmin connected between the cfmin pi n and ground sets the minimum frequency in combination with an internally trimmed current source i osc(min) ? internal resistor r fmax sets the frequency range and thus the maximum frequency. resistor r fmax has a fixed value (18 k ? typical) the oscillator frequency depend s on the charge and di scharge currents of c fmin . the charge and discharge current contains a fixed component, i osc(min) , which determines the minimum frequency. in addition, it contains a variable component that is 4.9 times greater than the current flowing through resistor r fmax : ? the voltage across resistor r fmax is v fmin(rfmax) (0 v) at the minimum frequency ? the voltage across resistor r fmax is v fmax(fb)(rfmax) (1.5 v at the maximum feedback frequency ? the voltage across resistor r fmax is v fmax(ss)(rfmax) (2.5 v) at the maximum soft-start frequency the maximum freq uency of the oscillator is internally limited. the hb frequency is limited to f limit(hb) (minimum 500 khz). the half-bridge slope controls th e oscillator. the osc illator charge current is initially set to a low value i osc(red) (30 ? a). when the start of the half-bridge slope is detected, the charge current is increase d to its normal value. this feature is used in combination with the adaptive non-overlap time function as described in section 7.8.4.2 and figure 12 . fig 13. determination of oscillator current
859fg 854fg 859fg 854fg
h
*3(

j
(3'
: 2 :f59g : 2 :f59g 2
j
-
2
h
1
' 0 0 (3' / *3( - 1 0 :fg 2 59 e
/3*/ :f86g 2 59 e
(3-' :f8a:kg 2 59 e
-3)+ :fa=bg 2 59 e
+3,+
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 26 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the length of time the oscillator current is low is negligible under normal operating conditions because the half-bri dge slope normally starts directly after the mosfet is switched off. 7.8.6 hbc feedback input (snsfb pin) in a typical power supply application, the out put voltage is compared and amplified on the secondary side. the error amplifier output is transferred to the primary side using an optocoupler. the optocoupler can be connect ed directly to the snsfb pin. the current setting of the optocoupler can be selected using the external pull-up resistor. the snsfb pin is a voltage input. at an snsfb voltage of v fmin(snsfb) (6.4 v) the frequency is at a minimum. the ma ximum frequency is reached at v fmax(snsfb) (4.1 v). the maximum frequency that can be reached using the snsfb pin is lower (70 %) than the maximum frequency that can be reached using the sshbc/en pin. 7.8.7 hbc open-loop protection, olp-hbc (snsfb pin) under normal operating conditions, the optocoupler current is between i fmin(snsfb) and i fmax(snsfb) and pulls down the voltage at the snsfb pin. due to an error in the feedback loop, the current can be less than i fmin(snsfb) with the hbc controller delivering maximum output power. the hbc controller features open-loop prot ection (olp), which monitors the snsfb voltage. when v snsfb exceeds v olp(snsfb) , the protection timer is started. the restart state is activated if the olp condition is st ill present after the protection time has elapsed. 7.8.8 hbc soft-start (pin sshbc/en) the relationship between switching frequency and output current is not constant. it depends strongly on the output voltage and the boost voltage. this relationship can be complex. the TEA1716T contains a soft-sta rt function to ensure that the resonant converter starts or restarts with safe currents. this soft-start function forces a start at such a high frequency that the currents are acceptable under all conditions. the soft-start then slowly decreases the frequency. normally, ou tput voltage regulation takes over frequency control before soft-start reaches its minimum frequency. limiting the output current during start-up also limits the rate at which the output voltage rises and prevents an overshoot. soft-start utilizes the voltage on the sshbc/en pin. the external capacitor c ss(hbc) sets the timing of the soft-start. the sshbc/en pin is also used as an enable input. soft-start voltage levels are above the enable voltage thresholds. 7.8.8.1 soft-start voltage levels figure 13 shows the relationship between the soft-s tart voltage on pin sshbc/en and the oscillator current. at initial start-up, v sshbc/en v fmin(sshbc) (8.0 v). v sshbc/en is clamped at a maximum of v clamp(sshbc) (8.4 v) (frequency is at a minimum) and at a minimum ( ? 3 v). below v fmax(sshbc) (maximum frequency), the discharge current is reduced to a maximum frequency soft-start current of 5 ? a. the voltage is clamped at a minimum of v pu(en) (3 v). both clamp levels are just outside the operating
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 27 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc area between v fmax(sshbc) and v fmin(sshbc) . the margins avoid frequency disturbance during normal output voltage regulation, bu t ensure that overcurrent regulation can respond quickly. 7.8.8.2 soft-start charge and discharge at initial start-up, the soft-start capacitor c ss(hbc) is charged to obtain a decreasing frequency sweep from the maximum to the operating frequency. the soft-start functionality is used to soft-start the reson ant converter and for regulation purposes (such as overcurrent regulation). c ss(hbc) can therefore be charged or discharged. a continuous alternation between charging and discharging occurs during overcurrent regulation. in this way v sshbc/en can be regulated, overruling the signal from the feedback input. the charge and discharge current can have a high value, i ss(hf)(sshbc) (160 ? a), resulting in fast charging and discharging. or it can have a low value, i ss(lf)(sshbc) (40 ? a), resulting in a slow charging and discharging. this two- speed soft-start sweep allows a combination of a short start-up time for the resonant converter and stable regulation loops (such as overcurrent regulation). the fast charge and discharge is used for the upper frequency range where v sshbc/en v ss(hf-lf)(sshbc) (5.6 v). in the lower frequency range, the currents in the converter react strongly to frequency variations. section 7.8.10.2 describes how the two-speed soft-sta rt function is used for overcurrent regulation. the soft-start capacitor is not charged or discharged during non-operation time in burst mode. the soft-start voltage does not change during this time. 7.8.8.3 soft-start reset some protection functions, such as overcurrent protection, require fast correction of the operating frequency set point, but do not require switching to stop. see section 7.9 for details on which protection functions use this step to the maximum frequency. the TEA1716T has a special fast soft-start reset f eature for the hbc controller that forces an immediate step to maximum frequency. soft -start reset is also used when the hbc controller is enabled using the sshbc/en pin or after a restart to ensure a safe start at maximum frequency. soft-start reset is not used when the operation was stopped in burst mode. when a protection function is activated, the oscillator contro l input is disconnected from the soft-start capacitor, c ss(hbc) , which is connected betwe en the sshbc/en pin and ground. the switching frequency is immediately set to a maximum. setting the switching frequency to a maximum restores safe switching operation in most cases. at the same time, the capacitor is discharged to the maximum frequency level, v fmax(sshbc) . once v sshbc/en has reached this level, th e oscillator control input is connected to the pin again and the normal soft-start sweep follows. figure 14 shows the soft-start reset and the two-speed frequency sweep downwards.
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 28 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 7.8.9 hbc high-frequency protection, hfp-hbc normally the converter does not operate c ontinuously at maximum frequency because it sweeps down to much lower values. certain error conditions, such as a disconnected transformer, can cause the converter to oper ate continuously at maximum frequency. if zero-voltage switching conditions are no lo nger present, the mosfets can overheat. the TEA1716T features high-frequency protection (hfp) for the hbc controller to protect it from being damaged in such circumstances. hfp senses the voltage across the internal resistor r fmax . this voltage indicates the current frequency. when the frequency is higher than 75 % of the soft-start frequency range, the protection timer is starte d. the 75 % level corresponds to an r fmax voltage of v hfp(rfmax) (4.31 v). 7.8.10 hbc overcurrent regulation and protection, ocr and ocp (snscurhbc pin) the hbc controller is protected a gainst overcurrent in two ways: ? overcurrent regulation (ocr) which increases the frequency slowly; the protection timer is also started. ? overcurrent protection (ocp) which steps to maximum frequency. a boost voltage compensation function is us ed to reduce the variation in the output current protection level. 7.8.10.1 boost voltage compensation the primary current, also known as the resonant current, is sensed using the snscurhbc pin. it senses the momentary vo ltage across an external current sense resistor r cur(hbc) . the use of the momentary current signal allows for fast overcurrent protection and simplifies the stabilizing of overcurrent regulati on. the ocr and ocp comparators compare v snscurhbc with the maximum positi ve and negative values. fig 14. soft-start reset and two-speed soft-start protection 0 v fmax(sshbc) v sshbc/en v fmin(sshbc) 0 f min f hb f max t off on f max forced fast sweep slow sweep regulation regulation v ss(hf-lf)(sshbc) 014aaa864
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 29 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the primary current is higher when the boost voltage is low for the same output power. boost compensation is included to reduce th e dependency of the protected output current level on the boost voltage. the boost compensation sources and sinks a current from the snscurhbc pin. this current creates a volt age drop across the series resistor r curcmp . the amplitude of the current is linearly depe ndent on the boost voltage. at nominal boost voltage, the current is zero and the voltage v cur(hbc) across the current sense resistor is also present on the snscurhbc pin. at the uvp-boost start level v uvp(snsboost) , the current is at a maximum. the current sink or source direction depends on the active gate signal. the voltage drop created across r curcmp reduces the amplitude at the pin. this reduction in amplitude results in a higher effective current protection level. the r curcmp value sets the amount of compensation. figure 15 shows how the boost compensation works for an artificial current signal. the sinking compensation current only flows when v snscurhbc is positive because of the circuit implementation. 7.8.10.2 overcurrent regulation (ocr-hbc) the lowest comparator leve ls at the snscurhbc pin v ocr(hbc) ( ? 0.5 v and +0.5 v), relate to the overcurrent regulation voltage. there are comparators for both the positive and negative polarities. the positive comparator is active during the high-side on-time and fig 15. boost voltage compensation v cur(hbc) = r cur(hbc) i cur(hbc) i ocr(high) i ocp(high) i ocp(nom) i ocr(nom) -i ocr(nom) -i ocp(nom) -i ocr(high) -i ocp(high) i cur(hbc) i snscurhbc v reg v uvp v boost gatels gatehs sink current only with positive v snscurhbc sink source 0 0 0 t t t t low v boost strong compensation high ocp low v boost strong compensation high ocr nominal v boost no compensation nominal ocp nominal v boost no compensation nominal ocr v snscurhbc t t 014aaa865 v snscurhbc v ocr(hbc) -v ocr(hbc) v ocp(hbc) -v ocp(hbc)
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 30 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc the following high-side to low- side non-overlap time. the negative comparator is active during the remaining time. if either level is exceeded, the frequency is slowly increased. discharging the soft-start capacitor achieves this. each time the ocr level is exceeded, the even t is latched until the next stroke and the soft-start discharge current is enabled. when both the positive and negative ocr levels are exceeded, the soft-start discharge current flows continuously. overcurrent regulation is very effective at limiting the output current during start-up. a smaller soft-start capacitor is used to achieve a faster start-up. using a smaller capacitor can result in an output curren t that is too high at times. however, the ocr function slows down the frequency sweep when required to keep the output current within the specified limits. figure 16 shows the operation of the ocr during output voltage start-up. the protection timer is also started. the re start state is activated when the ocr-hbc condition is still present after th e protection time has elapsed. 7.8.10.3 overcurrent protection (ocp-hbc) under normal operating conditions, ocr is ab le to ensure the current remains below the specified maximum values. howe ver, in the event of certain error conditions occur, however, it is not fast enough to limit the current. ocp is implemented to protect against those error conditions. the ocp level v ocp(hbc) ( ? 1.75 v and +1.75 v), is higher than the ocr level v ocr(hbc) . fig 16. overcurrent regulation during start-up i ocr -i ocr i cur(hbc) i ss(hf)(sshbc) i ss(if)(sshbc) -i ss(if)(sshbc) -i ss(hf)(sshbc) i sshbc/en v sshbc/en v fmin(sshbc) v ss(hf-lf)(sshbc) v fmax(sshbc) v o v reg 0 0 0 t t t t fast soft start sweep (charge and discharge) slow soft start sweep (charge and discharge) 014aaa866
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 31 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc when the ocp level is reached, the frequency immediately jumps to the maximum value using the soft-start reset, then a normal sweep down. 7.8.11 hbc capacitive mode regulation, cmr (hb pin) the mosfets in the half-bridge drive the resonant circuit. depending on the output load, the output voltage and the switching frequency th is resonant circuit can have an inductive or a capacitive impedance. indu ctive impedance is preferred beca use it facilitates efficient zero-voltage switching. harmful switching in capacitive mode is av oided using the adaptive non-overlap time function (see section 7.8.4.2 ). an extra action is performed which results in capacitive mode regulation (cmr). cmr causes the half -bridge circuit to return to inductive mode from capacitive mode. capacitive mode is detected when the hb slope does not start within t to(cmr) after the mosfets have switched off. detection of ca pacitive mode increases the switching frequency. this increase is caused by dischargi ng the soft-start capacitor with a relatively high current i cmr(hf)(sshbc) fimmediately after t to(cmr) expires until the half-bridge slope starts. the frequency increase regulates the hbc to the border between capacitive and inductive mode. 7.9 protection functions overview table 4. overview protections protected part symbol protection affected action description ic uvp-supic undervoltage protection supic ic disable section 7.2.1 ic uvp-supreg undervoltage protection supreg ic disable section 7.2.2 ic uvp-supplies undervoltage protection supplies ic disable and reset section 7.3 ic scp-supic short circuit protection supic ic low hv start-up current section 7.2.4 ic ovp-output overvoltage pr otection output ic shut-down section 7.5.4 ic fsp-output failed start protection output ic restart after protection time section 7.5.5 ic otp overtemperature protection ic disable section 7.5.6 pfc ocr-pfc overcurrent regulation pfc pfc switch off cycle-by-cycle section 7.7.7 pfc uvp-mains undervoltage protection mains pfc suspend switching section 7.7.8 pfc ovp-boost overvoltage protection boost pfc suspend switching section 7.7.9 pfc scp-boost short circuit protection boost ic restart section 7.7.10 pfc olp-pfc open-loop protection pfc ic restart section 7.7.10 hbc uvp-boost undervoltage protection boost hbc disable section 7.8.2 hbc olp-hbc open-loop protection hbc i c restart after protection time section 7.8.7 hbc hfp-hbc high-frequency protection hb c ic restart after protection time section 7.8.9 hbc ocr-hbc overcurrent regulation hbc hbc ic increase frequency restart after protection time section 7.8.10.2 hbc ocp-hbc overcurrent protection hbc hbc step to maximum frequency section 7.8.10.3 hbc cmr capacitive mode regulation hbc increase frequency section 7.8.11 hbc ano adaptive non-overlap hbc prevent hazardous switching section 7.8.4
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 32 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 8. limiting values table 5. limiting values in accordance with the absolute maximum rating system (iec 60134).; all voltages are measured with respect to thesgnd pin; currents are positive when flowing into the ic; the volt age ratings are valid provided other ratings are not violated; current ratings are valid provided the maximum power rating is not violated. symbol parameter conditions min max unit voltages v suphv voltage on pin suphv continuous ? 0.4 +630 v v suphs voltage on pin suphs dc ? 0.4 +570 v t<0.5s ? 0.4 +630 v referenced to the hb pin ? 0.4 +14 v v supic voltage on pin supic ? 0.4 +38 v v snsauxpfc voltage on pin snsauxpfc ? 25 +25 v v supreg voltage on pin supreg ? 0.4 +12 v v snsout voltage on pin snsout ? 0.4 +12 v v rcprot voltage on pin rcprot ? 0.4 +12 v v snsfb voltage on pin snsfb ? 0.4 +12 v v sshbc/en voltage on pin sshbc/en ? 0.4 +12 v v snsburst voltage on pin snsburst ? 0.4 +12 v v gatehs voltage on pin gatehs [1] ? 0.4 v suphs +0.4 v v gatels voltage on pin gatels [1] ? 0.4 v supreg +0.4 v v gatepfc voltage on pin gatepfc [1] ? 0.4 v supreg +0.4 v v snscurhbc voltage on pin snscurhbc ? 5+5 v v snsboost voltage on pin snsboost ? 0.4 +12 v v snsmains voltage on pin snsmains ? 0.4 +12 v v snscurpfc voltage on pin snscurpfc current limited ? 0.4 +5 v v comppfc voltage on pin comppfc ? 0.4 +5 v v cfmin voltage on pin cfmin ? 0.4 +5 v v pgnd voltage on pin pgnd ? 1+1 v currents i gatepfc current into pin gatepfc duty cycle < 10 % ? 0.8 +2 a i snscurpfc current into pin snscurpfc ? 1+10 ma general p tot total power dissipation t amb < 75 ?c- 0 . 8w t stg storage temperature ? 55 +150 ?c t j junction temperature ? 40 +150 ?c
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 33 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc [1] exceeding this rating for short peak currents (t < 10 ? s) is allowed. [2] equivalent to discharging a 100 pf capacitor through a 1.5 k ? series resistor. [3] equivalent to discharging a 200 pf capacitor through a 0.75 ? h coil and a 10 ? resistor. 9. thermal characteristics 10. characteristics esd v esd electrostatic discharge voltage human body model pin 12 (suphv) [2] - 1500 v pin 13,14,15 (hs driver) [2] - 1000 v other pins [2] - 2000 v machine model all pins [3] - 200 v charged device model all pins - 500 v table 5. limiting values ?continued in accordance with the absolute maximum rating system (iec 60134).; all voltages are measured with respect to thesgnd pin; currents are positive when flowing into the ic; the volt age ratings are valid provided other ratings are not violated; current ratings are valid provided the maximum power rating is not violated. symbol parameter conditions min max unit table 6. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient in free air; jedec single layer test board 90 k/w table 7. characteristics t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit high-voltage start-up source (pin suphv) i dism(suphv) disable mode current on pin suphv disabled ic state - 140 - ? a i red(suphv) reduced current on pin suphv v supic v start(hvd)(supic) -7- ? a v det(suphv) detection voltage on pin suphv -- 25v v rst(suphv) reset voltage on pin suphv v supic TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 34 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc low-voltage ic supply (pin supic) v start(hvd)(supic) start voltage with high voltage detected v suphv >v det(suphv) 19 20 21 v v start(nohvd)(supic) start voltage with no high voltage detected v suphv v uvp(supreg) ? 40 ? 100 - ma i ch(red)(supreg) reduced charge current on pin supreg v supreg 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 35 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc fast shut-down reset (pin snsmains) v rst(snsmains) reset voltage on pin snsmains [2] -0.8-v protection and restar t timer (pin rcprot) v u(rcprot) upper voltage on pin rcprot 3.84.0 4.2v v l(rcprot) lower voltage on pin rcprot 0.40.5 0.6v i ch(fast)(rcprot) fast-charge current on pin rcprot - ? 2.2 - ma i ch(slow)(rcprot) slow-charge current on pin rcprot ? 120 ? 100 ? 80 ? a output voltage protection sensing, ovp/fsp output (pin snsout) v ovp(snsout) overvoltage protection voltage on pin snsout [2] 3.40 3.50 3.60 v v fsp(snsout) failed start protection voltage on pin snsout [2] 2.35 2.5 2.65 v i pu(snsout) pull-up current on pin snsout -75-na overtemperature protection t otp overtemperature protection trip [2] 130 150 160 ?c burst mode activati on (pin snsburst) v burst(snsburst) burst mode voltage on pin snsburst burst stop state activation 3.42 3.5 3.58 v v burst(hys)snsburst burst mode hysteresis voltage on pin snsburst -23-mv i burst(hys)snsburst burst mode hysteresis current on pin snsburst v snsburst 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 36 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc t off(pfc)min minimum pfc off-time - 1.4 - ? s pfc error amplifier (pins snsboost and comppfc) v reg(snsboost) regulation voltage on pin snsboost i comppfc = 0 2.475 2.500 2.525 v g m transconductance v snsboost to i comppfc ; |v snsboost ? v reg(snsboost) |<40mv -80- ? a/v i sink(comppfc) sink current on pin comppfc v snsboost =2.0v - 90 - ? a i source(comppfc) source current on pin comppfc v snsboost =3.3v - ? 90 - ? a v offset(gm)high high-transconductance offset voltage pin snsboost; i comppfc = ? 40 ? a-100-mv i comppfc =+40 ? a- ? 100 - mv v clamp(comppfc) clamp voltage on pin comppfc [3] -4-v pfc mains compensatio n (pin snsmains) t on(max) maximum on-time high mains; v snsmains = 3.3 v 3.5 4.7 5.9 ? s low mains; v snsmains = 0.97 v 29 44 59 ? s v mvc(snsmains)max maximum mains voltage compensation voltage on pin snsmains 4.0 - - v pfc demagnetization sensing (pin snsauxpfc) v demag(snsauxpfc) demagnetization voltage on pin snsauxpfc ? 150 ? 100 ? 50 mv t to(mag) magnetization time-out time 40 50 60 ? s i prot(snsauxpfc) protection current on pin snsauxpfc v snsauxpfc =50mv ? 75 ? 33 - na pfc valley sensing (pin snsauxpfc) (dv/dt) vrec(min) minimum valley recognition rate of voltage change -- 1.7v/ ? s t slope(vrec)min minimum valley recognition slope time v snsauxpfc =1v(p-p) [4] -- 300ns demagnetization to ? v/ ? t=0 [5] - - 50 ns t d(val-dem)max maximum valley-to-demagnetization delay time -200-ns t to(vrec) valley recognition time-out time 34 6 ? s pfc soft-start (pin snscurpfc) i ch(ss)(pfc) pfc soft-start charge current - ? 60 - ? a v clamp(ss)(pfc) pfc soft-start clamp voltage [1] 0.44 0.50 0.56 v table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 37 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc v stop(ss)(pfc) pfc soft-start stop voltage [1] -0.45-v r ss(pfc) pfc soft-start resistor 12 - - k ? pfc overcurrent sensi ng (pin snscurpfc) v ocr(pfc) pfc overcurrent regulation voltage dv/dt = 50 mv/ ? s 0.49 0.52 0.55 v dv/dt = 200 mv/ ? s 0.51 0.54 0.57 v t leb(pfc) pfc leading edge blanking time 250 310 370 ns i prot(snscurpfc) protection current on pin snscurpfc ? 50 ? 33 - na pfc mains voltage sensing and clamp (pin snsmains) v start(snsmains) start voltage on pin snsmains [1] 1.11 1.15 1.19 v v uvp(snsmains) undervoltage protection voltage on pin snsmains [1] 0.84 0.89 0.94 v v pu(snsmains) pull-up voltage on pin snsmains uvp-mains active [1] -1.05-v i pu(snsmains) maximum clamp current uvp-mains active - ? 42 ? 35 ? a i prot(snsmains) protection current on pin snsmains v snsmains >v uvp(snsmains) -33100na pfc boost voltage protection sensin g, scp/uvp/ovp boost (pin snsboost) v scp(snsboost) short circuit protection voltage on pin snsboost 0.35 0.40 0.45 v v start(snsboost) start voltage on pin snsboost - 2.30 2.40 v v uvp(snsboost) undervoltage protection voltage on pin snsboost 1.50 1.60 - v v ovp(snsboost) overvoltage protection voltage on pin snsboost 2.59 2.63 2.67 v i prot(snsboost) protection current on pin snsboost v snsboost = 2.4 v - 45 100 na hbc high-side and low-side driver (pin gatehs and gatels) i source(gatehs) source current on pin gatehs v gatehs ? v hb =4v - ? 310 - ma i source(gatels) source current on pin gatels v gatels ? v pgnd =4v - ? 310 - ma i sink(gatehs) sink current on pin gatehs v gatehs ? v hb =2v; -560-ma v gatehs ? v hb =11v -1.9-a i sink(gatels) sink current on pin gatels v gatels ? v pgnd =2v - 560 - ma v gatels ? v pgnd =11v -1.9-a table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 38 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc v rst(suphs) reset voltage on pin suphs -4.5-v i q(suphs) quiescent current on pin suphs v suphs ? v hb =11v - 37 - ? a hbc adaptive non-overlap time (pin hb) (dv/dt) ano(min) minimum adaptive non-overlap time rate of voltage change -- 120v/ ? s t no(min) minimum non-overlap time -- 160ns hbc current controlled oscillator (pin cfmin) f min(hb) minimum frequency on pin hb c fmin = 390 pf; v sshbc/en >v fmin(sshbc) v snsfb > v fmin(snsfb) 40 45 50 khz i osc(min) minimum oscillator current charge and discharge 138 153 168 ? a i osc(burst) /i min burst oscillator current to minimum current ratio v snsfb =5v; i min =i osc(min) =153 ? a 2.50 2.72 2.93 - i osc(fbck) /i min feedback oscillator current to minimum current ratio v snsfb v fmin(sshbc) 3.94.1 4.3v hbc soft-start (pin sshbc/en) v fmax(sshbc) maximum frequency voltage on pin sshbc -3.2-v v fmin(sshbc) minimum frequency voltage on pin sshbc v snsfb >v fmin(snsfb) 7.78.0 8.3v v clamp(sshbc) clamp voltage on pin sshbc -8.4-v table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 39 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc [1] the marked levels on this pin are correlated. the voltage diff erence between the levels has much less spread than the absolu te value of the levels themselves. [2] switching level has some hysteresis. t he hysteresis falls within the limits. [3] for a typical application with a compensation network on the comppfc pin, like the example in figure 17 . [4] minimum required voltage change time fo r valley recognition on the snsauxpfc pin. [5] minimum time required between demagnetization detection and ? v/ ? t = 0 on the snsauxpfc pin. v ss(hf-lf)(sshbc) high-low frequency soft-start voltage on pin sshbc [2] -5.6-v i ss(hf)(sshbc) high-frequency soft start current on pin sshbc v sshbc < v ss(lf-hf)(sshbc) charge current - ? 160 - ? a discharge current - +160 - ? a i ss(lf)(sshbc) low-frequency soft start current on pin sshbc v sshbc > v ss(lf-hf)(sshbc) charge current - ? 40 - ? a discharge current - +40 - ? a i cmr(hf)(sshbc) high frequency cmr current on pin sshbc v sshbc < v ss(lf-hf)(sshbc) discharge only - 1800 - ? a i cmr(lf)(sshbc) low frequency cmr current on pin sshbc v sshbc > v ss(lf-hf)(sshbc) discharge only -440- ? a hbc high frequency sens ing, hfp-hbc (pin cfmin) i osc(hfp) /i min high-frequency protection oscillator current to minimum current ratio i min =i osc(min) =153 ? a 3.89 4.31 4.73 hbc overcurrent sensing, ocr/ocp-hbc (pin snscurhbc) v ocr(hbc) hbc overcurrent regulation voltage positive level; hs on + hs-ls non-overlap time +0.45 +0.50 +0.55 v negative level; ls on + ls-hs non-overlap time ? 0.55 ? 0.50 ? 0.45 v v ocp(hbc) hbc overcurrent protection voltage positive level; hs on + hs-ls non-overlap time +1.6 +1.75 +1.9 v negative level; ls on + ls-hs non-overlap time ? 1.9 ? 1.75 ? 1.6 v i bstc(snscurhbc)max maximum boost compensation current on pin snscurhbc v snsboost =1.8v source current; v snscurhbc = ? 0.5 v - ? 175 - ? a sink current; v snscurhbc =0.5v - 175 - ? a hbc capacitive mode protection (cmp) (pin hb) t to(cmr) time-out capacitive mode regulation -690-ns table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified symbol parameter conditions min typ max unit
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 40 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 11. application information fig 17. TEA1716T application diagram !4a7 fg 859 ! ! !
4:b 9b77 949b 478 9b77 ab :b fg =b6=b :=:56 :=fg =fg 2 . fg fg 6b 6b :=fg =fg !fg = TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 41 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 12. package outline fig 18. package outline sot137 (so24) unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z ywv references outline version european projection issue date iec jedec jeita mm inches 2.65 0.3 0.1 2.45 2.25 0.49 0.36 0.32 0.23 15.6 15.2 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.1 0.4 sot137-1 x 12 24 w m so24: plastic small outline package; 24 leads; body width 7.5 mm sot137-1 99-12-27 03-02-19
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 42 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 13. abbreviations table 8. abbreviations acronym description ano adaptive non-overlap cmos complementary metal-oxide-semiconductor' cmr capacitive mode regulation dmos double-diffused metal-oxide-semiconductor emi electromagnetic interference fsp failed start protection hbc half-bridge converter or controller. resonant converter which generates the regulated output voltage. hfp high-frequency protection hv high-voltage ocp overcurrent protection ocr overcurrent regulation olp open-loop protection otp overtemperatu re protection ovp overvoltage protection pfc power factor converter or controller. converter which performs the power factor correction. uvp undervoltage protection scp short-circuit protection
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 43 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 14. revision history table 9. revision history document id release date data sheet status change notice supersedes TEA1716T v.3 20121130 product data sheet - TEA1716T v.2 modifications: ? text and drawings updated throughout entire data sheet. TEA1716T v.2 20120821 product data sheet - TEA1716T v.1 TEA1716T v.1 20120127 objective data sheet - -
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 44 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc 15. legal information 15.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nxp.com . 15.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nxp semiconductors sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. product specification ? the information and data provided in a product data sheet shall define the specification of the product as agreed between nxp semiconductors and its customer , unless nxp semiconductors and customer have explicitly agreed otherwis e in writing. in no event however, shall an agreement be valid in which the nxp semiconductors product is deemed to offer functions and qualities beyond those described in the product data sheet. 15.3 disclaimers limited warranty and liability ? information in this document is believed to be accurate and reliable. however, nxp semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such info rmation. nxp semiconductors takes no responsibility for the content in this document if provided by an information source outside of nxp semiconductors. in no event shall nxp semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. notwithstanding any damages that customer might incur for any reason whatsoever, nxp semiconductors? aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the terms and conditions of commercial sale of nxp semiconductors. right to make changes ? nxp semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use ? nxp semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an nxp semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nxp semiconductors and its suppliers accept no liability for inclusion and/or use of nxp semiconducto rs products in such equipment or applications and therefore such inclusion and/or use is at the customer?s own risk. applications ? applications that are described herein for any of these products are for illustrative purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers are responsible for the design and operation of their applications and products using nxp semiconductors products, and nxp semiconductors accepts no liability for any assistance with applications or customer product design. it is customer?s sole responsibility to determine whether the nxp semiconductors product is suitable and fit for the customer?s applications and products planned, as well as fo r the planned application and use of customer?s third party customer(s). customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. nxp semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer?s applications or products, or the application or use by customer?s third party customer(s). customer is responsible for doing all necessary testing for the customer?s applic ations and products using nxp semiconductors products in order to av oid a default of the applications and the products or of the application or use by customer?s third party customer(s). nxp does not accept any liability in this respect. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) will cause permanent damage to the device. limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the recommended operating conditions section (if present) or the characteristics sections of this document is not warranted. constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. terms and conditions of commercial sale ? nxp semiconductors products are sold subject to the gener al terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms , unless otherwise agreed in a valid written individual agreement. in case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. nxp semiconductors hereby expressly objects to applying the customer?s general terms and conditions with regard to the purchase of nxp semiconducto rs products by customer. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification.
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 45 of 47 nxp semiconductors TEA1716T resonant power supply control ic with pfc export control ? this document as well as the item(s) described herein may be subject to export control regu lations. export might require a prior authorization from competent authorities. non-automotive qualified products ? unless this data sheet expressly states that this specific nxp semicon ductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nxp semiconductors? warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors? specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nxp semiconductors? standard warranty and nxp semiconduct ors? product specifications. 15.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. 16. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com
TEA1716T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 3 ? 30 november 2012 46 of 47 continued >> nxp semiconductors TEA1716T resonant power supply control ic with pfc 17. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 2 2.1 general features . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 pfc controller features. . . . . . . . . . . . . . . . . . . 2 2.3 hbc controller features . . . . . . . . . . . . . . . . . . 2 2.4 protection features . . . . . . . . . . . . . . . . . . . . . . 2 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 ordering information . . . . . . . . . . . . . . . . . . . . . 3 5 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 pinning information . . . . . . . . . . . . . . . . . . . . . . 5 6.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 functional description . . . . . . . . . . . . . . . . . . . 6 7.1 overview of ic modules . . . . . . . . . . . . . . . . . . 6 7.2 power supply . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.2.1 low-voltage supply input (supic pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.2.2 regulated supply (supreg pin) . . . . . . . . . . . . . . . . . . . . . . . . . 8 7.2.3 high-side driver floating supply (suphs pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.2.4 high-voltage supply input (suphv pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.3 flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.4 enable input (sshbc/en pin) . . . . . . . . . . . . . . . . . . . . . . . 11 7.5 ic protection . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7.5.1 ic restart and shutdown . . . . . . . . . . . . . . . . . 12 7.5.2 protection and restart timer . . . . . . . . . . . . . . 13 7.5.2.1 protection timer . . . . . . . . . . . . . . . . . . . . . . . 13 7.5.2.2 restart timer . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7.5.3 fast shutdown reset (snsmains pin). . . . . . . . . . . . . . . . . . . . . . . 14 7.5.4 output overvoltage protection (snsout pin) . . . . . . . . . . . . . . . . . . . . . . . . 14 7.5.5 output failed star t protection, fsp-output (snsout pin) . . . . . . . . . . . . . . . . . . . . . . . . 14 7.5.6 overtemperat ure protection (otp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.6 burst mode operation (snsburst pin) . . . . . . . . . . . . . . . . . . . . . . 15 7.7 pfc controller. . . . . . . . . . . . . . . . . . . . . . . . . 15 7.7.1 pfc gate driver (gatepfc pin). . . . . . . . . . . . . . . . . . . . . . . . 16 7.7.2 pfc on-time control . . . . . . . . . . . . . . . . . . . . 16 7.7.2.1 pfc error amplifier (comppfc and snsboost pins) . . . . . . . . 16 7.7.2.2 pfc mains compensation (snsmains pin) . . . . . . . . . . . . . . . . . . . . . . 17 7.7.3 pfc demagnetization sensing (snsauxpfc pin). . . . . . . . . . . . . . . . . . . . . 18 7.7.4 pfc valley sensing (snsauxpfc pin). . . . . . . . . . . . . . . . . . . . . 18 7.7.5 pfc frequency and off-time limiting . . . . . . . . 19 7.7.6 pfc soft-start and soft-stop (snscurpfc pin) . . . . . . . . . . . . . . . . . . . . 19 7.7.7 pfc overcurrent regulation, ocr-pfc (snscurpfc pin) . . . . . . . . . . . . 20 7.7.8 pfc mains undervoltage protection/brownout protection, uvp-mains (snsmains pin) . . . . . . . . . . . . . . . . . . . . . . 20 7.7.9 pfc boost overvoltage protection, ovp-boost (snsboost pin) . . . . . . . . . . . . 21 7.7.10 pfc short circuit/open-loop protection, scp/olp-pfc (snsboost pin) . . . . . . . . . 21 7.8 hbc controller . . . . . . . . . . . . . . . . . . . . . . . . 21 7.8.1 hbc high-side and low-side driver (gatehs and gatels pins). . . . . . . . . . . . . 21 7.8.2 hbc boost undervoltage protection, uvp-boost (snsboost pin) . . . . . . . . . . . . 21 7.8.3 hbc switch control. . . . . . . . . . . . . . . . . . . . . 22 7.8.4 hbc adaptive non-overlap (ano) time function (hb pin) . . . . . . . . . . . . . 22 7.8.4.1 inductive mode (normal operation) . . . . . . . . 22 7.8.4.2 capacitive mode . . . . . . . . . . . . . . . . . . . . . . 24 7.8.5 hbc slope controlled oscillator (pin cfmin) . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.8.6 hbc feedback input (snsfb pin) . . . . . . . . . 26 7.8.7 hbc open-loop protection, olp-hbc (snsfb pin). . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.8.8 hbc soft-start (pin sshbc/en) . . . . . . . . . . . 26 7.8.8.1 soft-start voltage levels . . . . . . . . . . . . . . . . . 26 7.8.8.2 soft-start charge and discharge . . . . . . . . . . . 27 7.8.8.3 soft-start reset . . . . . . . . . . . . . . . . . . . . . . . . 27 7.8.9 hbc high-frequency protection, hfp-hbc . . 28 7.8.10 hbc overcurrent regulation and protection, ocr and ocp (snscurhbc pin) . . . . . . . . . . . . 28 7.8.10.1 boost voltage compensation . . . . . . . . . . . . . 28 7.8.10.2 overcurrent regulation (ocr-hbc) . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.8.10.3 overcurrent protection (ocp-hbc) . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.8.11 hbc capacitive mode regulation, cmr (hb pin). . . . . . . . . . . . . . . . . . . . . . . . . 31 7.9 protection functions overview . . . . . . . . . . . . 31
nxp semiconductors TEA1716T resonant power supply control ic with pfc ? nxp b.v. 2012. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 30 november 2012 document identifier: TEA1716T please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 8 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 32 9 thermal characteristics . . . . . . . . . . . . . . . . . 33 10 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 33 11 application information. . . . . . . . . . . . . . . . . . 40 12 package outline . . . . . . . . . . . . . . . . . . . . . . . . 41 13 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 42 14 revision history . . . . . . . . . . . . . . . . . . . . . . . . 43 15 legal information. . . . . . . . . . . . . . . . . . . . . . . 44 15.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 44 15.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 15.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 15.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 45 16 contact information. . . . . . . . . . . . . . . . . . . . . 45 17 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

▲Up To Search▲

Price & Availability of TEA1716T

	To Download TEA1716T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .