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(R)
TSM111
TRIPLE VOLTAGE AND CURRENT SUPERVISOR
.OVERVOLTAGEPROTECTI .OVERCURRENTPROTECTI .POWERGOODCI .GENERATESPOWERGOODSI .REMOTEON/ .PROGRAMMABLE .14. .TWO
AND 12V COMPONENTS
ON FOR 3.3V, 5V WITHOUT EXTERNAL
ON FOR 3.3V, 5V AND 12V WITH INTERNAL THRESHOLD VOLTAGE RCUITRY GNAL OFF FUNCTION TIMING FOR POWER GOOD SIGNAL 5V TO 36V SUPPLY VOLTAGE RANGE 1.6% VOLTAGE REFERENCES FOR MAIN AND AUXILIARY CONVERTER REGULATION LOOPS
N DIP20 (Plastic Package)
D SO20 (Plastic Micropackage)
ORDER CODES
Part Number TSM111C Example : TSM111CD Temperature Range 0, +70oC Package N * D *
DESCRIPTION The TSM111 integrated circuit incorporates all sensing circuit to control a triple output power supply. It includes voltage references , comparatorsand matched resistors bridge for overcurrent and overvoltage detection without the need of any external components.Timing generatorwith externalcapacitors, control turn On and Off delays. It provides an integrated and cost effective solution for simultaneous multiple voltage control. APPLICATIONS This circuit is designedto be used in SMPS forDesktop PC, to supervise currents and voltages of all outputs and generate power good information to the system while managing all timing during transitory operation. The IC also manages the standby mode of SMPS while the PC is in sleep mode.
May 1999
PIN CONNECTIONS (top view)
Vs33 Vs5 Vs12 ADJ Vcc P WM REM Tre m PG Tpor
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
Is33 Is5 Is12 Ts ur GND FbMAIN VrefMAIN VrefAUX FbAUX UV
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TSM111
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Iout Pd Tstg ESD Iin
Note : 1.
Parameter DC Supply Voltage pin 5 - note 1 Output Current Power Good and PWM Power Dissipation Storage Temperature Range Electrostatic Discharge Input Current
Value 44 30 1 -55 to +150 2 50
Unit V mA W
o
C
kV mA
Al l vol tages val ues, except dif ferenti al voltage, are w ith respect to netw ork ground terminal.
OPERATING CONDITIONS
Symbol VCC Toper Ik
Note :
Parameter DC Supply Voltage pin 5 - note 2 Operating Free Air Temperature Range Operating Cathode Current, Vrefaux and Vrefmain
Value 15 to 36 0 to +70 30
Unit V
o
C
mA
2. The D C supply voltage must be higher than t he maxi mum vol tage applied on the 3.3, 5, 12V inputs (I s3.3, Is5, Is12) plus 2V. For example, if 13.2V is present on the I s12 input, the mi nimum required value on VCC is 15.2V .
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TSM111
ELECTRICAL CHARACTERISTICS VCC = 16V, Tamb = 0oC to 70oC (typical values given for 25oC)
Symbol ICC Vcs1 Vcs2 Vcs3 Viscm Vvs1 Vvs2 Vvs3 VAdj Parameter Total Suppy Current Current Sense Threshold Voltage 3.3V Current Sense Threshold Voltage 5V Current Sense Threshold Voltage 12V Current Sense Input Common Mode Voltage Range Overvoltage Sense 3.3V Overvoltage Sense 5v Overvoltage Sense 12V Threshold Voltage, 3.3V OVP Protection. ADJ input pin4 Threshold voltage (Tsur input) Tsur Timing with Determined External Components Tsur Input Clamp Voltage Input Pulled Down Voltage for V33, V5 and V12 Isink = 100A, REMOTE high 33k to VCC, 4.7F to ground see note 2 Test Condition PG Low 46.5 46.5 60.5 0 3.8 5.8 13.4 1.22 4 6.1 14.2 1.26 Min. Typ. 5 50 50 65 Max. 10 53.5 53.5 69.5 VCC -2 4.2 6.4 15 1.3 Unit mA mV mV mV V V V V V
Vsur Tsur Vsurend Vpull
2.4
2.5 21 7
2.6
V ms
8 0.4
V V
VOLTAGE REFERENCE, AUXILIARY CONVERTER (Fbaux)
Symbol Vrefaux Iaux Taux Regliaux Ioutaux Parameter Reference Voltage Current Stability Temperature Stability Line Regulation Output Sinking Current Capability 15 < VCC < 36V Vout > 2V 15 1 25 Test Condition Ir = 0.5mA, Tamb = 25 C Ir = 0.5mA to 10mA
o
Min. 2.46
Typ. 2.5
Max. 2.54 20 17
Unit V mV mV mV/V mA
VOLTAGE REFERENCE, MAIN CONVERTER (Fbmain)
Symbol Vrefmain Imain Tmain Reglimain Ioutmain Resp Parameter Reference Voltage Current Stability Temperature Stability Line Regulation Output Sinking Current Capability Absolute Precision of the Internal Resistor Connected to Vrefmain (39k, 10k, 5.4k) Matching of the Internal Resistors Connected to Vrefmain (39k, 10k, 5.4k) 15 < VCC < 36V Vout > 2V 15 1 25 +-15 Test Condition Ir = 0.5mA, Tamb = 25 C Ir = 0.5mA to 10mA
o
Min. 2.46
Typ. 2.5
Max. 2.54 20 17
Unit V mV mV mV/V mA %
Resm
+-1
%
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TSM111
POWER GOOD SECTION
Symbol Tpor Ic Vth Vhdet Vhpor Vdet Rdet Vvs4 tr tf Vol2 Ioh2 Parameter Turn on Delay for Power Good, Cpor = 2.2F Tpor Delay Charging Current Tpor Delay Threshold Voltage Under Voltage Comparator Hysteresis Hysteresis on Tpor Voltage Detect Level UV Input pin 11 Load Resistor on Vdetect UV Input pin 11 Undervoltage Sense 5V PG Output Rise Time PG Output Fall Time Power Good Output Saturation Level Power Good Leakage Current Collector C L = 100pF CL = 100pF Ic = 15mA Vout = 5V 4.1 Test Condition Ic = 20A typ., Vth = 2V typ. Min. 100 12 1.8 20 200 1.22 Typ. 300 20 2 40 250 1.26 20 4.3 1 300 0.4 1 4.5 1.3 Max. 500 28 2.2 80 Unit ms A V mV mV V k V s ns V A
REMOTE On/Off
Symbol Vrem Iil Vol1 Ioh1 Vih1 Trem1 Trem2 Parameter Remote On/Off Input Threshold Level Remote Input Low Driving Current Remote Output (PWM) Saturation Level Remote Output (PWM) Collector Leakage Current Remote Input Voltage Level Timing On to Off in to On/Off out, Cext = 100nF Timing Off to On in to On/Off out, Cext = 100nF Ic = 0.5mA Vout = 5V Pin 7 open 4.2 4 16 8 24 Test Condition Min. 1 Typ. Max. 1.8 1 1.3 1 5.25 14 34 Unit V mA V A V ms ms
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TSM111
PIN DESCRIPTION
Name VCC Pin 5 Type supply Function Positive supply voltage. The DC supply voltage must be higher than the maximum voltage applied on the 3.3, 5, 12V inputs (Is3.3, Is5, Is12) plus 2V. For example, if 13.2V is present on the Is12 input, the minimum required value on VCC is 15.2V Reference comparison input for main converter regulation loop. 2.5V +-1.6% Output for main converter regulation loop (optocoupler) Reference comparison input for auxiliary converter regulation loop. 2.5V +-1.6% Output for auxiliary converter regulation loop (optocoupler) 3.3V overcurrent control sense input. 3.3V overvoltage control sense input. 5V overcurrent control sense input. 5V overvoltage control sense input. 12V overcurrent control sense input. 12V overvoltage control sense input. Adjustment pin for 3.3V OVP. This pin is to be used for an OVP other than 3.3V (eg for C power supply = 2.7V). When not in use, this pin should be grounded. When in use, VS33 should not be connected. Overcurrent blank-out time 20 to 30ms settable through external RC. The voltage at this pin is clamped at typically 5V. Trip voltage = 1.25V. Remote On/Off logic input for C, turn off PWM after Trem delay. Rem = 0 means that the main SMPS is operational. Connected to external capacitor to determine Trem (remote control delay) timing. Trem (on to off) is 8ms typ. Trem (off to on) is 24ms typ. Crem = 0.1F Output signal to control the primary side of the main SMPS through an opto-coupler. When PWM is low, the main SMPS is operational. Connected to external capacitor for Power-on-reset timing. Cpor = 2.2F Undervoltage detection, control and detect main AC voltage failure. Power Good logic output, 0 or 5V. Power Good high (=1) means that the power is good for operation. Ground or Negative supply voltage.
Vrefmain Fbmain Vrefaux Fbaux IS33 V33 IS5 V5 IS12 V12 Adj
14 15 13 12 20 1 19 2 18 3 4
analog input analog output analog input analog output analog input analog input analog input analog input analog input analog input ana input
Tsur Rem Trem
17 7 8
program. analog input logic input program. analog input logic output program. analog input analog input logic input supply
PWM Tpor UV PG GND
6 10 11 9 16
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TSM111
APPLICATION DIAGRAM
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TSM111
TIMING DIAGRAM : remote control
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TSM111
TIMING DIAGRAM : overvoltage or overcurrent shut-down
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TSM111
AN EXAMPLE OF 90W MICRO ATX POWER SUPPLY USING L5991A, VIPER20 AND TSM111 Protection against accidental short circuits and fault conditions is mandatory in PC power supplies. These protection circuits can be realized by using many discrete components which occupy a lot of PCB space, design time in fine tuning the circuit and also add to assembling costs. ST's single chip TSM111 IC provides complete protection circuits design easier, with fewer number of components. TSM111 is an ideal supervisor IC for PC power supplies. The salient features and benefits of this device are listed below : a) Over voltage protectionfor 3.3V,5V and12V without external component. b) Over current protection for 3.3V, 5V and 12V. c) Generates Power Good signal. d) Programmable timing for Power Good signal. e) Wide range supply operating voltage up to 36V (44V AMR). f) Stable internal voltage reference. g) Two 1.6% voltage reference for Main and Auxiliary regulation. h) Few external components. i) Circuit occupies little space on PCB. j) Easy implementation of the circuit. FEATURE DESCRIPTIONS a) Over voltageprotectioncan be implementedwithout any additional components. Overvoltage sense levels for 3.3V, 5V, 12V are 4V, 6.1V, 14.2V respectively. With very little tolerances, better protection is achieved. b) Over current protectioncan be implemented with very small value sense resistors. As the current sense threshold levels are set very low, regulation is not affected. The current sense threshold levels for 3.3V, 5V, 12V are 50mV, 50mV and 65mV respectively. c) The power good signal (pin9) is asserted to indicate the 5V and 3.3V is above the under voltage threshold level. PG pin goes high when the above condition is reached. Pull up resistor R27 (3.1K) is connected to 5V STDBY supply from this pin. d) The timing of the power good signal can be controlled by adjusting the value of the charging capacitor on pin 10. With 2.2F/16V capacitor on pin 10, 400msec turn on delay is achieved. e) The power supply can be operated from 14.5V to 36V. The VCC must always be higher than the supply voltage on the 12V input pin by 2V .i.e. if 14V is appearing 12V input pin the Vcc must be > 16V.
A COMPLETE PC SMPS SECONDARY SUPERVISOR
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TSM111
f) Two internal high precision TL431 shunt regulators are built-in. It providesstable referencevoltages with a voltage precision of 1.6%. SUPERVISORY CIRCUIT OPERATION The system power ON/OFF logic is generated by the PC, which is "Low" in system "On" condition and "High" when the system is "Off". This is connected to remote pin 7. The IC's internal logic circuit generatesa control signal on pin 6. In normal operation, when there is no over voltage or over current at the three inputs, the voltage on pin 6 follows the Remote pin 7 voltage, i.e. if the remote pin 7 is low the pin 6 is also low or vice versa. When fault is detected on the inputs, control pin 6 goes "High". This control pin 6 output can be used to turn off the Mains Power Supply during fault condition. An optocoupler is connected directly, with cathode connected to the IC pin 6 and anode to 5V (from STDBY supply). In normal operation the voltage on pin 6 is (opto cathode) is around 3.7 V. On the primary side the opto transistor collector is pulled through a resistor to Vref. It is required to invert the signal before connecting to the feedback compensation pin 6 of L5991A for reverse logic. i.e during normal operation the compensation pin is not affected and during fault condition the pin is pulled Low. Slight delay (R34,C32) is introduced on the primary side to avoid fault turn on condition.
Note : Once the fault conditi on is removed, it is required to reset the Remote pin to make the system functi on again.
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TSM111
BILL OF MATERIAL The following are the bill of material for the 90W SMPS :
No ICs 1 2 3 4 5 MOSFETs 6 7 Rectifiers 8 9 10 11 12 13 12 13 14 15 16 17 18 Connectors 19 20 21 22 23 24 25 26 AC input conn 20-pin conn: 39-01-2200 Fann connector Fuse 3.5A NTC TLP621 Optocoupler AC switch 115V-230V selector 1 1 1 1 1 3 1 1 Molex Siemens Toshiba 2.2 ohm 100% transfer ratio 20pin output connector with terminals Molex 39-00-0038 BYV10-40 BYW100-200 STPS20L40CT STSPS10L40CT KAL04 1N4148 HM00-98150 HM00-98151 HM00-98148 HM50-150K HM11-51502 HM28-32022 10uH 1 3 1 1 1 1 1 1 1 1 1 1 1 ST ST ST ST BI Tech.** BI Tech. BI Tech. BI Tech. BI Tech. BI Tech. Aux Transformer Main Transformer Coupled inductors 15uH inductors - output filter 2.2uH Inductors - output filter Common Mode choke - AC input filter 10uH inductors - output filter 1A, 40V or BYV10-60 or BYW100-200 1A, 100V or 200V, BYW100-100 2x10A, 40V or STPS2045CT or STPS30L40CT 2x5A, 40V 3Amp 400VAC Bridge Rectifier or higher STP6NB80 STP3020L 1 1 ST ST TO220 6A, 800V Mos TO220 22mohm 30V Mos L5991A VIPer20DIP TSM111 LM7912CV TL431 1 1 1 1 1 ST ST ST ST ST Advanced PWM Controller Aux controller PWM+Mos Triple Voltage and Current Supervisor -12V Post Regulator Programmable Voltage Reference Part Number Qt Manufacturers Remarks/Descirptions
Transformers / Inductors
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TSM111
.... continued BILL OF MATERIAL
No 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Part Number Capacitors 47UF/25V 3.9NF .47UF/16V 1NF 100UF/25 .22UF/250V A.C 1000UF/10V 3300UF/10 470UF/16V 2.2NF 2.2UF/16 470UF/25V 4.7NF 47UF/16V 100UF/25V 100UF/25V 47NF 220UF/200V 1000UF/25V 2.2UF 1.5NF 10NF .1UF 3.3NF 56NF 1 1 1 2 1 2 2 1 2 2 1 1 4 1 3 1 3 2 1 1 1 1 1 1 1 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 Qt No 20K 47K,3W 100K,1/2W 5.1K 3 MOHM 1OR 10 MOHM 4.7K 68K 680R 39K 3.1K 470K 100R 10K 3.3K 5 MOHM 1K 330R 10,1/4W 470R 0.68 6.8K Part Number Resistors 1 1 2 1 1 2 1 5 1 1 1 1 1 1 4 1 1 1 1 2 1 2 2 Qt
** BI Technolo ies Pte Lte Phone No: 65 249-1115 F ax No: 65 445-1983 Attn: Kelvi n Lim, Sales Dept
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TSM111
1 2 3 4 5 6 7 8 9 1 CON3 0
CN3
11114161890 123151712
P
WO K
P SO N / O F F
R29 R47 10K F 2 1 R22 R42 1K R38 3.3K 33K 12 C37 47nF 13 15 R27 3.1K 4.7K C41
9 FbAUX PG
10
2.2uF
7
-12V
R 680,1 /2W C38 C R26 39K
Tpor
REM
8
C51
VrefAUX FbMAIN
Trem
100nF
12V
R
47nF C25
1
100uF/25V IC7
1K C29
+ OUT
GND 2 470uF/25V L6 INDUCTOR L7912 C40
14 3 C23
VrefMAIN VS12
5V
L4 2.2uH
ADJ
4
R 20K
470uF/16V
3.3V
C24 1000u F/10V Q3 C22 + STP3020 1000u F/10V
R19 10mo hm 18 2 R17A 3.5m ohm 19 D14 1 R39 5mohm
TSM111 SUPERVISOR IS12 VS5 IC6
IN 3
C19
+ +
3300uF/10
1000uF/25V 100uF/25V L2 COUPLEDINDUCTOR
IS5 VS33 Gnd
16
D12
D15
1N4148 D16 BYW100-200 D11 STPS2045CT R17 D12 C21 STP1060CT 2.2nF R18
20
IS33 Vcc UV 11
D14 OP T C55
BYW100-200 D13 BYW100-200
BYW100-200
Tsur 1 7C28
2.2uF/16
PWM 6
C26 2.2nF
5
C34
9
12
T17
8
10
10
11
10
12
MAINS TRANS
R23 680
100uF/25V 10uF/35V IC4 R24 10K IC5
17V
6
4 5
3
2D3
OP T
1 1 2
C12
5 V S C18 D B Y T
470uF/16V L3 10uH C35
R43 C20 4.7K 470nF R X C17
R45 4.7K IC10 GND ANALOG TL431 D2 R10 4.7nF 47K BYT11-800
1 4 TLP621 3
R13 10K
2
4TLP621 3
R34 10K C32
C30 4.7nF
+
R20 220uF/16V 4.7K
C3
C4
+
D7 470uF/16 BYW100-200
+
D8100uF/25 BYW100-200 IC2 R44 330
+
220uF/200 V
+
220uF/200V R12 100K,1/2 W C9 S2 SW SPST D1 C10 4.7nF
Q1 STP6NB80
R7A .22 R7A1 R7 D 1K 20V R6 470 R3 100
1 2
6 7 9 8
R11 100K,1/ W 2
Q2 NPN1
T2
AUX TRANS
4 TLP621 3 2
R9 47 D4
3
R10 10
+
47uF/25V R5 10
5
D6 OPT
D5
1
C11
C7
OP T
D5 1N414 8
R4 10
1nF
3.3nF IC3 L5991A
1N414 8
+
R 47uF/25V 8.2K R15 5.1K C13 LF01 C2 VAR
BRIDGE
8
2 Vcc
8
R
10
13
12116
.22uF/250 A.C V
R OPT
9 14
7 6 5
o1c s D R IA C I 1N uI tP )E R 2 0 (o V
C14 4comp
OPT C31
Vc cc V O U TI S E N SGPGCO MP N DN D DIS I CL 5 9 9 1 3
C1 3.9nF R16 4.7K NTC 2.2ohm R28 470K
.22uF/250 A.C V
4.7nF R9 4.7K
1 5D C - L I M V RD C R C T EF 4 3 2
STBSVFB SY 167 5
.47uF/16V
GND
C16
3
1nF F1 3.5A
R8 6.8K
R2 6.8K C6 C8 C5 56nF .1uF 1.5nF
S1 CN1 SWSPST CON1
A.INPUT C 1 0 0 2 4~A .V C V 0
12
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TSM111
EVALUATION BOARD - TECHNICAL NOTICE TSM111 is a Housekeeping IC which is best used in PC Switch Mode Power Supplies for secondary 3.3V, 5V, and 12V power lines protection. TSM111 integrates all the necessaryfunctions for a secure and reliable overcurrent and overvoltage protection, as well as a logic interface for proper communication with the motherboard and adjustable timing circuitry for optimized sequencing management. Moreover, TSM111 integrates two precise shunt voltage references for direct optocoupler drive. TSM111, integrating the equivalent of more than 25 discrete components, saves a lot of design time and fine tuning, as well as PCB area, and increases the reliability of the whole application. How to use the TSM111 Evaluation Board ? This evaluation board allows to adapt the TSM111 housekeepingchip to an already existing PC Power Supply by simply choosing proper values for it's external components, and making the adequate connections to the I/O of the evaluation board. The Electrical Schematic of the TSM111 evaluation board is shown on figure 1. It includes the TSM111 as well as the minimum component number required to make the TSM111 fit in a PC SMPS application. Components calculations The overvoltage protection is not to be adjusted. Internal voltage thresholds are given by Vvs1, Vvs2, Vvs3 for respective protection of the 3.3V, 5V, 12V power lines. The overcurrent protection is given by the choice of the Sense resistors R1, R2, R3 (respectively for eachpower line 3.3V, 5V, 12V). Internalprecise voltage thresholds define the tripping voltage drops for each line following equations 1, 2 & 3 : Vcs1 = R1 x I33 eq1 Vcs2 = R2 x I5 eq2 Vcs3 = R3 x I12 eq3 where I33, I5, and I12 are the tripping currents. The system will latch (Fault output will be active high) if the overcurrent lasts more than the authorized surge delay Tsur given by equations 4 & 5 : Icharge = Vcc / R4 eq4 Tsur = (C1 x Vsur) / Icharge eq5 Note that eq4 is an approximation of a capacitive charge where Vcc (16V min) is large versus the threshold voltage Vsur (2.5V). R4=33k, C1=4.7F => Tsur=21ms Thanks to the Tsur adjustment, the normal surge currents which occur during power up (capacitive
EVALUATION BOARD - ELECTRICAL SCHEMATIC
J3 Optaux J16 VrefAux J15 VrefMain J7 IN12V J6 In5V J5 In3.3V J1 Vdet
1 2
Optaux
R9 R10
Roptaux C5 RoptMain C4
1 2
VrefAux 1 2 OptMain
J18 OptMain
1 2 VrefMain
R7 R8
1
In12V
1
In5V
1
In3.3V
R1 rs3.3V D1
20 11 9
R2 rs5V
R3 rs12V
Out12V
1
Out5V
1
Out3.3V 5Vstby
1
J8 Out12V J9 Out5V J10 Out3.3V J11 PG J12 Rem
21 8
3
1 41 51 31 2
9
R11
PG 1 2
1 2
Vdet
UV
11
Is33
UV Tsur PWM
Is5 Vs33
V I s s5 1 2
5Vstby
R4 Rsur
17 6
U1
TSM111
Vcc 5 Gnd 16 4
Vs12 F b m r Fe i f n A u x abA V r e fV M a i n 10 u x Tpor
Rem 7
PG
Adj
TRem 8
J2 Fault J13 Vcc J14 Gnd
R6
1 2 VCC 1 2 Fault
D6Fro m c D5 C3 Cpor
1 3
R5 R rem C2 Crem
1 2
I C1 Csur
2 +
U2 78L05
Vin Vout
1INV
SW1 5Vstby
2 4
5Vstby 3
C7
1 2
GND 1
C6
BP Rem
1 2
J20
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TSM111
loads charging) are blankedfor a time dependingon each application. When the system has latched (either after overcurrent or overvoltage condition), the system needs to be reset via the Remote input. The C2 capacitor determines two different timings to the Fault output : C2=100nF => Trem1(ON to OFF)=8ms C2=100nF => Trem2(OFF to ON)=24ms R5 is a pull down resistor on the remote pin of TSM111. Note that an integrated pull up resistor of 100k is to be taken into account in the choice of R5, knowing that the threshold voltage of the input comparator is 1.4V. Therefore, R5 should be lower than 38.8k. R5 = 1k is a good value. The evaluation board integrates the possibility to make theRemote signaleither manual, or electronic thanks to the ORing diodes D5 and D6 (and the pull down resistor R5), and the Push Button (SW1). These diodes can of course be replaced by straps according to the evaluation requirements (manual or electronic). The Tpor delay time allows the PG output (Power Good) to rise to high level when the 5V power line internal supervision circuitry has stayed above the undervoltage 4.3V threshold for more than Tpor time following the approximated equation 6 : C3 x Vth = Ic x Tpor eq6 where Vth is 2V and Ic is 20A. C3=2.2F => Tpor=300ms When the 5V power line passes under the 4.3V undervoltage threshold, the Power Good signal (PG) falls immediately to low level. ThePower Good output can also be triggered by the Vdet input of the board. This input should be connected to a power line representative of the AC mains power situation. As an example, an additional winding on the auxiliary power supply offer an early warning of power down from the mains power point of view. The UV threshold is internally fixed to Vdet=1.26V. Therefore, it is necessary to add a zener diode D1. D1=15Vzener => Vdet=16.26V Note that a 20k serial pull down resistor is integrated. Therefore, only a low power zener is needed. The Fault output needs a pull up resistor R6. The Power Good output needs a pull up resistor R11. Both signals are pulled up to the 5Vstandby power supply which can be generated from the evaluation board thanks to a 78L05 5V regulator. This regulator needsa C6 bypass capacitor. The C7 bypass capacitor smoothens the VCC pin of TSM111. The Adj (Adjust) pin shouldbe connectedto ground. Adjust allows to tune a new overvoltage protection value (ex 2.7V instead of 3.3V). Example of component lists Table 1 gives an example of component list
Name U1 U2 R1 Type IC IC R 1/4W R 1/2W R 1W R 1/4W R 1/2W R 1W R 1/4W R 1/2W R 1W R 1/4W R 1/4W R 1/4W R 1/4W R 1/4W R 1/4W R 1/4W R 1/4W Z 1/4W D 1/4W D 1/4W C Electro C Plastic C Electro C Plastic C Plastic C Plastic C Electro Value Comment TSM111 DIP20 78L05 TO92 10m 5A 5m 10A 2.5m 20A 10m 5A 5m 10A 2.5m 20A 65m 1A 13m 5A 6.5m 10A 33k 1k 47k depends on opto used 10k comp. network to be fine tuned depends on opto used 10k comp. network to be fine tuned 47k 15V 1N4148 1N4148 4.7F 100nF 2.2F 10NF comp. network to be fine tuned 10NF comp. network to be fine tuned 100nF 10F
R2
R3
R4 R5 R6 R7 R8 R9 R10 R11 D1 D5 D6 C1 C2 C3 C4 C5 C6 C7
Figures 2a and 2b show the copper and silkscreen sides of the Evaluation board PCB. Note that it is not a 1/1 scale.
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TSM111
Figure 2a Figure 2b
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TSM111
PACKAGE MECHANICAL DATA 20 PINS -PLASTIC DIP
Dimensions a1 B b b1 D E e e3 F I L Z
Min. 0.254 1.39
Millimeters Typ.
Max. 1.65
Min. 0.010 0.055
Inches Typ.
Max. 0.065
0.45 0.25 25.4 8.5 2.54 22.86 7.1 3.93 3.3 1.34
0.018 0.010 1.000 0.335 0.100 0.900 0.280 0.155 0.130 0.053
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TSM111
PACKAGE MECHANICAL DATA 20 PINS -PLASTIC MICROPACKAGE (SO)
Dimensions A a1 a2 b b1 C c1 D E e e3 F L M S
Min. 0.1 0.35 0.23
Millimeters Typ.
Max. 2.65 0.3 2.45 0.49 0.32 45 (typ.)
o
Min. 0.004 0.014 0.009
Inches Typ.
Max. 0.104 0.012 0.096 0.019 0.013
0.5 12.6 10 1.27 11.43 7.4 0.5 7.6 1.27 0.75 8o (Max.) 0.291 0.020 13.0 10.65 0.496 0.394
0.020 0.512 0.419 0.050 0.450 0.299 0.050 0.030
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