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1. general description the SSL2109T is a high-voltage integrated circuit (ic) for driving led lamps in general lighting applications. the main benefits of this ic include: ? small printed-circuit board (pcb) footprint and compact solution ? high efficiency (up to 95 %) for non-dimmable high power factor solutions ? high power factor >0.9 (application dependent) ? ease of integration and many protection features ? low electronic bill of material (bom) ? highly flexible ic for use in buck, buck/boost and flyback modes ? single inductor used for non-isolated configurations because of internal demagnetization detection and dv/dt supply the ic is supplementary to the ssl21081/ssl21083 series but without an internal switch. the ic h a s been designed to start up directly from the hv supply by an internal high-voltage current source. thereafter, the dv/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. th is functionality provides full flexibility in the application design. an internal clamp limits the supply voltage. the ic provides accurate output current control to within 5 % led current accuracy. the ic can be operated using pulse-width modulation (pwm) current regulation and has many protection features includi ng easy led temperature feedback. 2. features and benefits ? led driver ic for driving strings of leds or high-voltage led modules from a rectified mains supply ? part of a high-efficiency switch mode flyback or buck product family. ? driver-only which can drive an external mosfet ? driver that has power-efficient bounda ry conduction mode of operation with: ? no reverse recovery loss es in fre e wheel diode ? zero current switching (z cs) for switch turn-on ? zero voltage or valley swit ching for switch turn-off ? minimal required inductance value and size ? suitable for high power factor (>0.9) applications ? applicable in buck, buck/boost and flyback topologies SSL2109T compact non-dimmable led driver ic rev. 5 ? 3 october 2013 product data sheet
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 2 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic ? direct pwm current regulation possible ? fast transient response through cycle-by-cycle current control: ? negligible ac mains ripple in led curr ent and minimal total capacitance in low ripple configurations ? no over or undershoots in the led current ? simple high input power factor solution (>0.9) ? internal protection features: ? undervoltage lockout (uvlo) ? leading-edge blanking (leb) ? overcurrent protection (ocp) ? short-winding protection (swp) ? internal overtemperature protection (otp) ? brownout protection ? output short pr otection (osp) ? low component count led driver solution (see f i gure 3 ): ? easy external temperature protection with a single ntc ? option for sof t -start function ? compatible with wall swit ch es with built-in indication light during standby ? ic lifetime easily matches or surp as ses led lamp lifetime 3. applications the SSL2109T is intended for compact led lamps with accurate fixed current output for single mains input voltages. mains input voltages include 100 v, 120 v and 230 v (ac). the ou tput signal can be modulated using a pwm signal. external components determine the power range. 4. quick reference data [1] an internal clamp sets the supply voltage. the current into the vcc pin must not exceed the maximum idd value (see table 4 ) table 1. quick reference data symbol parameter conditions min typ max unit v cc supply voltage operating range [1] 8 - 16 v i cc(int) internal supply current normal operation - 1.3 - ma v hv voltage on pin hv ? 0.4 - +600 v v drain voltage on pin drain ? 0.4 - +600 v f conv conversion frequency - 100 - khz v o(driver)max maximum output voltage on pin driver vcc > v cc(startup) 9 10.5 12 v
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 3 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 5. ordering information 6. block diagram table 2. ordering information type number package name description version SSL2109T so8 plastic small package outline body; 8 leads; body width 3.9 mm sot96-1 fig 1. SSL2109T block diagram ddd 17& )81&7,21 6833/< ,17(51$/ 5(*8/$725 $1' %$1'*$3 9$//(< '(7(&7,21 g9g7 6833/< /2*,& &21752/ $1' 3527(&7,21 6:3 2&3 7+(50$/ 6+87'2:1 325 /2*,& -)(7 + 9 9&& 17& *1' 6285&( '5,9(5 '5$,1 '9'7 7210$; %/$1. 72))0$; 9 9!9
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 4 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 7. pinning information 7.1 pinning 7.2 pin description fig 2. SSL2109T pin configuration ,& +9 '5$,1 9&& *1' 17& '9'7 6285&( '5,9(5 ddd table 3. pin description symbol pin description hv 1 high-voltage supply pin vcc 2 supply voltage ntc 3 temperature protection input source 4 low-side external switch driver 5 driver output dvdt 6 ac supply pin gnd 7 ground drain 8 high-side external switch
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 5 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 8. functional description 8.1 introduction the SSL2109T is a driver for small form fact or retrofit ssl lamps and separate led drivers. 8.2 converter operation the converter in the SSL2109T is a boundary conduction mode (bcm), peak current controlled system. figure 3 shows the basic application diagram. figure 4 shows the waveforms. this converter type operates at the boundary between continuous and discontinuous mode . ene rgy is stored in inductor l each pe riod that the switch is on. the inductor current i l is zero when the mosfet is switched on. the amplitude of the current build-up in l is proportional to the voltage drop over the inductor and the time that the mosfet switch is on. when the mosfet is switched off, the energy in the inductor is released towards the output. the current then falls at a rate proportional to the value of v out . the led current i led depends on the peak current through the inductor (SSL2109T controlled) and on the hv bus voltage while it is optimized for a high power factor. as soon as the inductor current i l is zero, a new cycle is started. this quasi-resonant oper ation results in higher efficiency. 8.3 driver pin the SSL2109T is equipped with an internal driver that can control an external switch. the voltage on the driver output pin is increased towards v o(driver)max to open the switch during the first cycle (t 0 to t 1 ). the voltage on the driver output pin is pulled down towards a low level from the start of the secondar y stroke until the ne xt cycle starts (t 0 to t 00 ). during transition from low to high and back, there is a controlled switching slope steepness. this controlled condition limits the hi gh-frequency radiation from the circuit to the surrounding area. at the lowest vcc voltage (v cc(stop) ), the voltage of the driver is v o(driver)min . fig 3. SSL2109T basic low ripple buck application diagram ,& +9 '9'7 9&& '5$,1 17& '5,9(5 *1' 17& /('v 6285&( ddd 5 lquxvk 5 vhqvh 9 vhf
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 6 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 8.4 valley detection a new cycle is started when the pr imary switch is switched on (see figure 4 ). in the following sections, ?on? represents the conduc tive st ate and off the non-conductive state. following time t 1 , when the peak current is detected on the source pin, the switch is turned off and the secondary stroke starts at t 2 . when the secondary stroke is completed with the coil current at t 3 equaling zero, the drain volt age starts to oscillate at approximately v in ? v out level. the peak-to-peak amplitude equals 2 ? v out . a special feature, called valley detection is an integrated part of the SSL2109T circuitry. dedicated built-in circuitry connected to the drain pin, senses when the voltage on the drain of the switch has reached its lowest value. the next cycle is then started at t 00 . as a result the capacitive switching losses are reduced. if both the frequency of t he oscillations and the volt a ge sw ing are within the range specified (f ring and ? v vrec(min) ) for detection, a valley is detected and accepted. if a valid valley is not detected, the secondary stroke is continued until the maximum off-time (t off(high) ) is reached. then the next cycle is started. a series resistance can be included at the drain sensing pin for flyback mode to remove the h i gh-frequency ringing caused by the transformer leakage inductance. fig 4. buck waveforms and valley detection aaa-001744 demagnetization v in valley v gate v drain 0 0 i l v out magnetization 3 2 t 1 t 0 t 00 t 2 t 3 t 4 1
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 7 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 8.5 protective features the ic has the following protections: ? undervoltage lockout (uvlo) ? leading-edge blanking (leb) ? overcurrent protection (ocp) ? internal overtemperature protection (otp) ? brownout protection ? short-winding protection (swp) ? output short protection (osp) ? led overtemperature control and protection the swp and the osp are latched protections. these pr otections cause the ic to halt until a reset (a resu lt of power cycling) is executed. when v cc drops to below v cc(rst) , the ic resets the latch protection mode. th e internal otp and led over temperature protections are safe-resta rt protections. if v cc drops to below v cc(stop) , the ic halts. switching starts only when a no fault condition exists. 8.5.1 undervoltage lockout (uvlo) when the voltage on the vcc pin drops lower than v cc(stop) , the ic stops switching. an attempt is made to restart by supplying v cc from the hv pin voltage. 8.5.2 leading-edge blanking (leb) to prevent false detection of the short-winding or overcurrent, a blanking time following switch-on is implemented. when the mosfet switch switches on, there can be a short current spike due to capacitive discharge of voltage over the drain and source and the charging of the gate to source capacitance . during the leb time (t leb ), the spike is disregarded. 8.5.3 overcurrent protection (ocp) the SSL2109T contains a highly accurate peak current detector. it triggers when the voltage at the source pin reaches the peak-level v th(ocp)source . the current through the switch is sensed using a resistor connect ed to the source pin. the sense circuit is activated following leb time t leb . as the led current is half the peak current (by design), it automatically provides protection for maximu m led current during operation. there is a propagation delay (t d(ocp-swoff) ) between the overcurrent detection and the actual switching off of the switch. due to the de lay, the actual peak current is slightly higher than the ocp level set using the resistor in series to the source pin. 8.5.4 overtemperature protection (otp) when the internal otp function is triggered at a certain ic temperature (t th(act)otp ) , the converter stops operating. the otp safe-res tart protection and the ic restart with switching resuming when the ic temperature drops to below t th(rel)otp .
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 8 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 8.5.5 brownout protection brownout protection is designed to limit the lamp power when the input voltage drops close to the output voltage level. the input power has to remain constant. the input current would otherwise increase to a level that is too high for the input circuitry. for the SSL2109T, there is a maximum limit on the on-time of switch t on( high) . the rate of current rise in the coil during the on-phase is proportional to the difference be twe en input voltage and output voltage. ther efore, the peak current cannot be reached before t on (high) . as a result the average output current to the leds is reduced. 8.5.6 short-winding protection (swp) swp activates if there is a steep rising current through the mosfet. the voltage across the external resistor connected to the so urce pin increases. this current can occur when there is a short from the freewheel diode. additionally, it occurs due to a small/shorted inductor between the input voltage and the drain pin. if the voltage on the source pin exceeds 1.5 v, latched protection is tr igger ed following leb time t leb . in addition, if v cc drops to below v cc(rst) , the ic resets the latched protection mode. 8.5.7 output short-circuit protection (osp) during the secondary stro ke (switch-off time), if a valley is not detected within the off-time limit (t off(high) ), then typically the output voltage is less than the minimum limit allowed in the application. this condition can occur either during start-up or due to a short-circuit. a timer t det(sc) is started when t off(high) is detected. timer t det(sc) is reset when a valid valley detection occurs in one of the subsequent cycles or when v cc drops to below v cc(stop) . the timer can also be reset if the maximu m limit on the on-time of the switch (t on(high) ) is reached, which is usually the case at start-up (brownout protection). if no valley is detected and (t on(high) ) is not reached before t det(sc) , then it is concluded that a real short-circuit exists. the ic enters latched protection. if v cc drops to below v cc(rst) , the ic resets the latched protection mode (see figure 5 ). fig 5. osp logic diagram ddd 9$//(< '(7(&7,21 7,0(5 w ghwvf 9 &&uvw w rqkljk 9 &&vwrs 64 5 w riikljk 6 263 4 5 ?
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 9 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 8.6 vcc supply the SSL2109T can be supplied using three methods: ? under normal operation, the voltage swing on the dvdt pin is rectified within the ic providing current towards the vcc pin ? at start-up, there is an internal current source connected to the hv pin. the current source provides internal power until either the dv/dt supply or an external current on the vcc pin provides the supply ? using an auxiliary winding, the voltage is rect ified and connected to the vcc pin via a series resistor. the ic starts up before the voltage at the vcc pin exceeds v cc(startup) . the ic locks out (stops switching) when the voltage at the vcc pin is < v cc(stop) . the hysteresis between the start and stop levels allows the ic to be supplied by a buffer capacitor until the dv/dt supply is settled. the SSL2109T has an internal v cc clamp, which is an internal active zener (or shunt regulator). this internal active zener limits the voltage on the supply vcc pin to the maximum value of v cc . if the maximum current of the dv/dt supply minus the current consumption of the ic (determined by the load on the gate drivers) is lower than the i dd maximum value, no external zener diode is required in the supply circuit. 8.7 dvdt pin supply the dvdt pin is connected to an internal si ngle-sided rectification stage. when a different voltage with sufficient amplitude is supplied to the pin, the ic can be powered without any other external power connection. this provides an effective method to prevent additional high power losses, which are the result if a r egulator were used for continuously powering the ic. unlike an auxiliary supply, addit ional inductor winding s are not required. 8.8 vcc regulator during supply dips, the input voltage can drop so much that it can no longer supply the required ic current through the dvdt pin. under these conditions, if the vcc voltage drops lower than v cc(swon)reg level, another regulator with a current capability of up to i hvhigh(oper) is started. the job of the regulator is to fill in the re quired supply cu rrent, which the dvdt supply does not deliver, thus preven ting that the ic en ters uvlo. when the vcc voltage exceeds the v cc(swon)reg level, the regulator is turned off. 8.9 ntc functionalit y and pwm regulation the ntc pin can be used as a control method for led thermal protection. alternatively, the pin can be used as an input to disable/enab le light output using a digital signal (pwm regulation). the pin has an internal current source that generates the current of i offset(ntc) . an ntc resistor to monitor the led temperature can be connected directly to the ntc pin. depending on the resistance value and the corresponding voltage on the ntc pin, the converter reacts as shown in figure 6 . during start-up, before v cc reaches v cc(startup) the voltage on the ntc pin must be less than the minimum value of v act(tmr)ntc . this is valid when the voltage on the ntc pin is derived from the v cc using a resistive divider and a ptc in series with the resistor between pins vcc and ntc.
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 10 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic if an ntc resistor is connected between the ntc pin and ground, the voltage on the ntc pin is 0 v when v cc reaches v cc(startup) . when the voltage on the ntc pin is higher than v th(high)ntc (see figure 6 (4)), the converter delivers nominal output current. when the voltage is lower than this level, the peak current is gradually reduced until v th(low)ntc is reached (see figure 6 (3)). the peak current is now half the peak current of nominal operation. when v act(tmr)ntc is passed (see figure 6 (2)), a timer starts to run to distinguish between the following situations: ? if the low-level v deact(tmr)ntc is not reached within time t to(deact)ntc (see figure 6 (1)), led overtemperature is detected. the ic stops switching and attempts to restart from the hv pi n voltage. the converter restarts from an ntc protection shutdown when the voltage on the ntc pin exceeds v th(high)ntc (see figure 6 (4)). it is assumed that the reduction in peak current does not result in a lower ntc temperature and led otp is activated. ? if the low-level v deact(tmr)ntc is reached within the time t to(deact)ntc (see figure 6 (1)) it is assumed that the pin is pulled down extern ally. the restart function is not triggered. instead, the output current is reduced to zero. pwm regulation and consequently led output current regulation can be implemented this way. the output current rises again when the voltage is higher than v th(low)ntc . 8.9.1 soft-start function the ntc pin can be used to make a soft start function. during switch-on, the level on the ntc pin is low. by connecting a capacitor (in parallel with the ntc resistor), a time constant can be defined. the time constant causes the level on the ntc pin to increase slowly. when passing level v th(low)ntc (see figure 6 (3)), the convertor starts with half of the maximum current. the output current slowly increases to maximum when v th(high)ntc (see figure 6 (4)) is reached. fig 6. ntc control curve 001aan700 2 3 4 5 i pk peak current i pk / 2 v th(ocp)source = 500 mv v th(ocp)source = 250 mv v ntc v th(high)ntc v th(low)ntc v act(tmr)ntc v deact(tmr)ntc 1
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 11 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 9. limiting values [1] the current flowing into the vcc pin must not exceed the maximum i dd value [2] an internal clamp sets the supply voltage. [3] human body model: equivalent to discharging a 100 pf capacitor through a 1.5 k ? series resistor. [4] c harged device model: equivalent to charging the ic up to 1 kv and the subsequent discharging of each pin down to 0 v over a 1 ? ? r esistor. 10. thermal characteristics table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit general sr slew rate on pin drain ? 5 +5 v/ns p tot total power dissipation so8 package - 0.6 w t amb ambient temperature ? 40 +125 ?c t j junction temperature ? 40 +150 ?c t stg storage temperature ? 55 +150 ?c voltages v cc supply voltage continuous [1] ? 0.4 +20 v v drain voltage on pin drain ? 0.4 +600 v v hv voltage on pin hv current limited ? 0.4 +600 v v source voltage on pin source current limited ? 0.4 +5.2 v v ntc voltage on pin ntc current limited ? 0.4 +5.2 v currents i dd supply current at pin vcc [2] - 20 ma i dvdt current on pin dvdt duration 20 ? s maximum - 1. 3 a v esd electrostatic discharge voltage human body model ; pins drain and hv [3] ? 1 +1 kv human body mode l; a ll other pins ? 2 +2 kv charged device [4] ? 500 +500 v table 5. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient in free air; pcb: 2 cm ? ? 3 cm; 2-layer; 35 ? m cu per layer 159 k/w in free air; pcb: jedec 2s2p 89 k/w ? j-top thermal characterization parameter from junction to top of package top package temperatur e measure d at the warmest point on top of the case 0.49 k/w
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 12 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 11. characteristics table 6. characteristics values specified at t amb = 25 ? c unless otherwise specified; all voltages are m easured with respect to ground; currents are positive when flowing into the ic. symbol parameter conditions min typ max unit f conv conversion frequency - 100 - khz high-voltage i leak(drain) leakage current on pin drain v drain = 600 v - - 10 ? a i leak(hv) leakage current on pin hv v hv = 600 v - - 30 ? a supply v cc supply voltage operating range [1] 8 - 16 v v cc(startup) start-up supply voltage 11 12 13 v v cc(stop) stop supply voltage 8 9 10 v v cc(hys) hysteresis of supply voltage between v cc(startup) and v cc(stop) 2 - 4.5 v v cc(rst) reset supply voltage 4.5 5 5.5 v v cc(swon)reg regulator switch-on supply voltage insufficient dv/dt supply 8.75 9.25 9.75 v v cc(swoff)reg regulator switch-off supply voltage insufficient dv/dt supply 9.5 10 10.5 v v cc(reg)hys regulator supply voltage hysteresis v cc( swoff)reg ? ? v cc(swon)reg 0.3 - - v v cc(regswon-stop) supply voltage difference between regulator switch-on and stop v cc(swon)reg ? ? v cc(stop) 0.3 - - v consumption i stb(hv) standby current on pin hv during start-up or in protection; v hv = 100 v 300 350 400 ? a i cc (int) internal supply current normal operation - 1.3 - ma capability i sup(high)hv high supply current on pin hv standby: v hv = 40 v; v cc < v cc(stop) 1 1.3 1.6 ma regulator on: v hv = 40 v; v cc < v cc(swon)reg after start-up 2 2.3 2.6 ma current and swp protection v th(ocp)source overcurrent protection threshold voltage on pin source ? v/ ? t = 0.1 v/ ? s 480 500 520 mv ? v/ ? t = 0.1 v/ ? s; v ntc = 0.325 v 230 250 270 mv t d(ocp-swoff) delay time from overcurrent protection to switch-off ? v/ ? t = 0.1 v/ ? s - 75 100 ns t leb leading edge blanking time overcurrent protection 260 300 340 ns short-winding protection 210 250 290 ns ? t leb leading edge blanking time difference between t leb for overcurrent protection and short-winding protection 30 50 - ns v th(swp)source short-winding protection threshold voltage on pin source 1.4 1.5 1.6 v
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 13 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic [1] an internal clamp sets the supply voltage. the curr ent into the vcc pin must not exceed the maximum i dd value (see table 4 ). [2] this parameter is not tested during production, by design it is guaranteed valley detection (? v/ ? t) vrec valley recognition voltage change with time on pin drain ? 30 ? 20 ? 10 v/ ? s f ring ringing frequency [2] 200 550 1000 khz ? v vrec(min) minimum valley recognition voltage difference voltage drop on pin drain 15 20 25 v t d(vrec-swon) valley recognition to switch-on delay time - 100 - ns brownout detection t on(high) high on-time 12.5 15 17.5 ? s driver (pin driver) i source(driver) source current on pin driver 1.5 ms maximum; v driver = 2 v - ? 0.195 - a i sink(driver) sink current on pin driver 20 ? s maximum; v driver = 2 v - 0.28 - a 20 ? s maximum; v driver = 10 v - 0.46 - a v o(driver)max maximum output voltage on pin driver v cc > v cc(startup) 9 10.5 12 v v o(driver)min minimum output voltage on pin driver v cc = v cc(stop) 6.5 7.5 8.5 v ntc functionality v th(high)ntc high threshold voltage on pin ntc 0.47 0.5 0.53 v v th(low)ntc low threshold voltage on pin ntc 0.325 0.35 0.375 v v act(tmr)ntc timer activation voltage on pin ntc 0.26 0.3 0.325 v v deact(tmr)ntc timer deactivation voltage on pin ntc 0.17 0.2 0.23 v t to(deact)ntc deactivation time-out time on pin ntc 33 46 59 ? s i offset(ntc) offset current on pin ntc - ? 47 - ? a osp t det(sc) short-circuit detection time 16 20 24 ms t off(high) high off-time 30 36 42 ? s temperature protection t th(act)otp overtemperature protection activation threshold temperature 160 170 180 ?c t th(rel)otp overtemperature protection release threshold temperature 90 100 110 ?c table 6. characteristics ?continued values specified at t amb = 25 ? c unless otherwise specified; all voltages are m easured with respect to ground; currents are positive when flowing into the ic. symbol parameter conditions min typ max unit
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 14 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 12. application information an led driver with the SSL2109T can be a buck, tapped buck or flyback converter operating in bcm. figure 7 shows a buck solution in a low ripple configuration using a minimum of components. capacitor c3 buffers the ic supply voltage, which is powered via the hv pin at start-up and via c5 dur ing normal operation. sense resistors r4 and r5 convert the current through mosfet q1 into a voltage on pin source. the value of these resistors determines the maximum primary peak current on mosfet q1, and thus the led current. resistor r6 reduces the reverse current into t he driver pin. the drain pin is connected with the drain of q1 for valley detection. in the example shown in figure 7 , the ntc pin is used fo r temperature protection. negative temperature coefficient (ntc) resistor r3 sets the temperature level. capacitor c4 reduce s noise on the ntc pin. see the SSL2109T application note for more information. fig 7. a typical SSL2109T buck low ripple application ,& +9 8 '5$,1 9&& *1' 17& '9'7 6285&( 5 17& n & q) & ?) 9 ' %<9* & ?) 9 '5,9(5 ddd & ?) 9 & ?) 9 / p+ p$6/ 59 ydulvwru9 5 ixvh / - - / 1 5 ' '%/6* 8 1 5 & s) n9 / p+ p$ 5 5 4 026)(71 - /(' /(' /(' /(' -
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 15 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 13. package outline fig 8. package outline sot96-1 (sot8) unit a max. a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz ywv references outline version european projection issue date iec jedec jeita mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 5.0 4.8 4.0 3.8 1.27 6.2 5.8 1.05 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 0.25 dimensions (inch dimensions are derived from the original mm dimensions) notes 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 2. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. 1.0 0.4 sot96-1 x w m a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 4 5 pin 1 index 1 8 y 076e03 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.20 0.19 0.16 0.15 0.05 0.244 0.228 0.028 0.024 0.028 0.012 0.01 0.01 0.041 0.004 0.039 0.016 0 2.5 5 mm scale so8: plastic small outline package; 8 leads; body width 3.9 mm sot96-1 99-12-27 03-02-18
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 16 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 14. abbreviations 15. references [1] an11041 ? ssl21081, ssl21083, and ssl2109 non-dimmable buck converter in low ripple co nfigurations [2] an11263 ? 230 v (ac) mains dimmable led driver using the ssl2129at or ssl210 84 at table 7. abbreviations acronym description bcm boundary conduction mode bom bill of materials leb leading-edge blanking led light emitting diode mosfet metal-oxide semiconductor field-effect transistor ocp overcurrent protection osp output short protection otp overtemperature protection pcb printed-circuit board pwm pulse-width modulation swp short-winding protection uvlo undervoltage lockout zcs zero-current switching
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 17 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 16. revision history table 8. revision history document id release date data sheet status change notice supersedes SSL2109T v.5 20131003 product data sheet - ssl2109_ser v.4 modifications: ? text and graphics have been updated throughout the data sheet. ssl2109_ser v.4 20121026 product data sheet - ssl2109_ser v.3 ssl2109_ser v.3 20120604 product data sheet - SSL2109T v.2 SSL2109T v.2 20120426 product data sheet - ssl2109 v.1.1 ssl2109 v.1.1 20120410 preliminary data sheet - ssl2109 v.1 ssl2109 v.1 20120330 preliminary data sheet - -
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 18 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic 17. legal information 17.1 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 multip le device s. the latest product status information is available on the internet at url http://www.nxp.com . 17.2 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 wit h t he 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 she et 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. 17.3 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 lia ble fo r 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 what soe v er, 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, aut hori z ed 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 prod uct s 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 product s 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 liabil ity rela ted 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 a bsolute maximum ratings system of iec 60134) will cause permanent damage t o 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 prod uct s 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 conclud ed 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 constr ued a s 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 objec tive specificati on fo r product development. preliminary [short] data sheet qualification this document contains data from t he pre liminary specification. product [short] data sheet production this document contains the product specification.
SSL2109T all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 19 of 20 nxp semiconductors SSL2109T compact non-dimmable led driver ic export control ? this document as well as the item(s) described herein may be su bject to export control regu lations. export might require a prior authorization from competent authorities. quick reference data ? the quick reference data is an extract of the product dat a given in th e limiting values and characteristics sections of this document, and as such is not comple te, exhaustive or legally binding. non-automotive qualified products ? unless this data sheet expressly stat es th at 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 pro duct 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. translations ? a non-english (translated) version of a document is for refe ren ce only. the english version shall prevail in case of any discrepancy between the translated and english versions. 17.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. greenchip ? is a trademark of nxp b.v. 18. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com
nxp semiconductors SSL2109T compact non-dimmable led driver ic ? nxp b.v. 2013. 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: 3 october 2013 document identifier: SSL2109T please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 19. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 quick reference data . . . . . . . . . . . . . . . . . . . . . 2 5 ordering information . . . . . . . . . . . . . . . . . . . . . 3 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 functional description . . . . . . . . . . . . . . . . . . . 5 8.1 introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.2 converter operation . . . . . . . . . . . . . . . . . . . . . 5 8.3 driver pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.4 valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 6 8.5 protective features . . . . . . . . . . . . . . . . . . . . . . 7 8.5.1 undervoltage lockout (uvlo) . . . . . . . . . . . . 7 8.5.2 leading-edge blanking (leb) . . . . . . . . . . . . . 7 8.5.3 overcurrent protection (ocp) . . . . . . . . . . . . . 7 8.5.4 overtemperature protection (ot p ) . . . . . . . . . 7 8.5.5 brownout protection . . . . . . . . . . . . . . . . . . . . . 8 8.5.6 short-winding protection (swp) . . . . . . . . . . . 8 8.5.7 output short-ci rc uit protection (osp). . . . . . . . 8 8.6 vcc supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 8.7 dvdt pin supply. . . . . . . . . . . . . . . . . . . . . . . . 9 8.8 vcc regulator . . . . . . . . . . . . . . . . . . . . . . . . . . 9 8.9 ntc functionality and pwm regulation. . . . . . . 9 8.9.1 soft-start function . . . . . . . . . . . . . . . . . . . . . . 10 9 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 11 10 thermal characteristics . . . . . . . . . . . . . . . . . 11 11 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 12 12 application information. . . . . . . . . . . . . . . . . . 14 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 15 14 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 16 15 references . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 16 revision history . . . . . . . . . . . . . . . . . . . . . . . . 17 17 legal information. . . . . . . . . . . . . . . . . . . . . . . 18 17.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 18 17.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 17.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 17.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 19 18 contact information. . . . . . . . . . . . . . . . . . . . . 19 19 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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