Datasheet TSM111 Datasheet (SGS Thomson Microelectronics)



TRIPLEVOLTAGE AND CURRENTSUPERVISOR

.OVERVOLTAGE PROTECTIONFOR 3.3V, 5V

AND 12V WITHOUT EXTERNAL
COMPONENTS

.OVERCURRENT PROTECTION FOR3.3V, 5V

AND 12V WITH INTERNAL THRESHOLD
VOLTAGE

.POWERGOODCIRCUITRY

.GENERATESPOWERGOODSIGNAL

.REMOTE ON/OFFFUNCTION

.PROGRAMMABLE TIMING FOR POWER

GOODSIGNAL

.14.5VTO 36V SUPPLYVOLTAGERANGE

.TWO 1.6% VOLTAGE REFERENCES FOR

MAIN AND AUXILIARY CONVERTER
REGULATIONLOOPS

TSM11 1

N

DIP20

(Plastic Package)

D

SO20

(PlasticMicropackage)

DESC RIP TI ON

The TSM111 integrated circuit incorporates all
sensingcircuit to control a tripleoutputpower sup­ply.Itincludesvoltagereferences, comparatorsand
matchedresistorsbridge for overcurrentand over­voltage detectionwithout the need of any external
components.Timinggeneratorwithexternalcapaci­tors, control turn On and Off delays. It providesan
integratedandcost effective solutionforsimultane­ous multiple voltagecontrol.

APPL ICATIONS

ThiscircuitisdesignedtobeusedinSMPSforDesk­top PC,tosupervisecurrentsandvoltagesof allout­puts and generate power good information to the
system while managing all timing during transitory
operation.

The IC also manages the standbymode of SMPS
while the PCis in sleepmode.

ORDER CODES

Part

Number

TSM111C 0, +70

Example : TSM111CD

PIN CONNE CTIONS (top view)

Vs33

Vs5

Vs12

ADJ

Vcc

PWM

REM

Trem

PG

Tpor

Temperature

Range

1

2

3

4

5

6

7

8

9

10 11

o

C ••

20

Is33

19

Is5

18

Is12

17

Tsur

16

GND

15

FbMAIN

14

VrefMAIN

13

VrefAUX

12

FbAUX

UV

Package

ND

May 1999

1/18

TSM111

SCHE MATIC DIAGRAM

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

I

T

DC Supply Voltage pin 5 - note 1 44 V

CC

Output Current Power Good and PWM 30 mA

out

Power Dissipation 1 W

P

d

Storage Temperature Range -55 to +150

stg

ESD Electrostatic Discharge 2 kV

Input Current 50 mA

I

in

Note : 1. A ll voltages values , except differential voltage, ar e wit h r espect to net work g r ound t er minal.

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

T

Note : 2. T he D C supply volt a ge must be higher than the maximum voltage applie d on th e 3.3, 5, 12V inp ut s

2/18

DC Supply Voltage pin 5 - note 2 15 to 36 V

CC

Operating Free AirTemperature Range 0 to +70

oper

Operating Cathode Current, Vrefaux and Vrefmain 30 mA

I

k

(I s3.3, Is5, I s12) plus 2V.
For exam ple, if 13.2V i s pre sent on t he I s12 input, th e mi nimum re quired value on V

CC

is 15.2V.

o

C

o

C

TSM111

ELECTRICAL CHARACTERISTICS

= 16V, T

V

CC

Symbol Parameter Test Condition Min. Typ. Max. Unit

I
V
V
V

V

V
V
V
V

Total Suppy Current PG Low 5 10 mA

CC

Current Sense Threshold Voltage 3.3V 46.5 50 53.5 mV

cs1

Current Sense Threshold Voltage 5V 46.5 50 53.5 mV

cs2

Current Sense Threshold Voltage 12V 60.5 65 69.5 mV

cs3

Current Sense Input Common Mode

iscm

Voltage Range
Overvoltage Sense 3.3V 3.8 4 4.2 V

vs1

Overvoltage Sense 5v 5.8 6.1 6.4 V

vs2

Overvoltage Sense 12V 13.4 14.2 15 V

vs3

Threshold Voltage, 3.3V OVP

Adj

Protection.

ADJ input pin4
V
T

V

V

surend

Threshold voltage (Tsur input) 2.4 2.5 2.6 V

sur

Tsur Timing with Determined External

sur

Components

Tsur Input Clamp Voltage 7 8 V

Input Pulled Down Voltage for V33, V5

pull

and V12

=0oCto70oC (typical values given for 25oC)

amb

see note 2 0 VCC-2 V

33kΩ to VCC, 4.7µFto
ground

Isink = 100µA,
REMOTE high

1.22 1.26 1.3 V

21 ms

0.4 V

VOLTAGE REFERENCE, AUXILIARY CONVERTER (Fbaux)

Symbol Parameter Test Condition Min. Typ. Max. Unit

Vrefaux Reference Voltage I

Iaux Current Stability I

= 0.5mA, T

r

= 0.5mA to 10mA 20 mV

r

=25oC 2.46 2.5 2.54 V

amb

Taux Temperature Stability 17 mV

Regliaux Line Regulation 15 < V

Ioutaux Output Sinking Current Capability V

out

< 36V 1 mV/V

CC

>2V 15 25 mA

VOLTAGE REFERENCE, MAIN CONVERTER (Fbmain)

Symbol Parameter Test Condition Min. Typ. Max. Unit

Vrefmain Reference Voltage I

Imain Current Stability I

= 0.5mA, T

r

= 0.5mA to 10mA 20 mV

r

Tmain Temperature Stability 17 mV

Reglimain Line Regulation 15 < V

Ioutmain Output Sinking Current Capability V

CC

>2V 15 25 mA

out

Resp Absolute Precision of the Internal

Resistor Connected to Vrefmain
(39k, 10k, 5.4k)

Resm Matching of the Internal Resistors

Connected to Vrefmain
(39k, 10k, 5.4k)

=25oC 2.46 2.5 2.54 V

amb

< 36V 1 mV/V

+-15 %

+-1 %

3/18

TSM111

POWER GOOD SECTION

Symbol Parameter Test Condition Min. Typ. Max. Unit

Tpor Turn on Delay for Power Good,

Cpor = 2.2µF

Ic Tpor Delay Charging Current 12 20 28 µA

Vth Tpor Delay Threshold Voltage 1.8 2 2.2 V
Vhdet Under Voltage Comparator Hysteresis 20 40 80 mV
Vhpor Hysteresis on Tpor 200 250 mV

Vdet Voltage Detect Level

UV Input pin 11

Rdet Load Resistor on Vdetect

UV Input pin 11

Vvs4 Undervoltage Sense 5V 4.1 4.3 4.5 V

tr PG Output Rise Time C

tf PG Output Fall Time C
Vol2 Power Good Output Saturation Level Ic = 15mA 0.4 V
Ioh2 Power Good Leakage Current Collector V

REMOTE On/Off

Symbol Parameter Test Condition Min. Typ. Max. Unit

Vrem Remote On/Off Input Threshold Level 1 1.8 V

Iil Remote Input Low Driving Current 1 mA
Vol1 Remote Output (PWM) Saturation Level Ic = 0.5mA 1.3 V
Ioh1 Remote Output (PWM) Collector

Leakage Current

Vih1 Remote Input Voltage Level Pin 7 open 4.2 5.25 V

Trem1 Timing On to Off in to On/Off

out, Cext = 100nF

Trem2 Timing Off to On in to On/Off

out, Cext = 100nF

Ic = 20µA typ.,

100 300 500 ms

Vth = 2V typ.

1.22 1.26 1.3 V

20 kΩ

= 100pF 1 µs

L

= 100pF 300 ns

L

=5V 1 µA

out

Vout = 5V 1 µA

4 8 14 ms

16 24 34 ms

4/18

PIN DESCRIPTION

Name Pin Type Function

V

CC

Vrefmain 14 analog input Reference comparison input for main converter regulation loop.

Fbmain 15 analog output Output for main converter regulation loop (optocoupler)
Vrefaux 13 analog input Reference comparison input for auxiliary converter regulation loop.

Fbaux 12 analog output Output for auxiliary converter regulation loop (optocoupler)

IS33 20 analog input 3.3V overcurrent control sense input.

V33 1 analog input 3.3V overvoltage control sense input.

IS5 19 analog input 5V overcurrent control sense input.

V5 2 analog input 5V overvoltage control sense input.

IS12 18 analog input 12V overcurrent control sense input.

V12 3 analog input 12V overvoltage control sense input.

Adj 4 ana input Adjustment pin for 3.3V OVP. This pin is to be used for an OVP other

Tsur 17 program.

Rem 7 logic input Remote On/Off logic input for µC, turn off PWM after Trem delay.

Trem 8 program.

PWM 6 logic output Output signal to control the primary side of the main SMPS through

Tpor 10 program.

UV 11 analog input Undervoltage detection, control and detect main AC voltage failure.

PG 9 logic input Power Good logic output, 0 or 5V. Power Good high (=1) means that

GND 16 supply Ground or Negative supply voltage.

5 supply 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 V

CC

is 15.2V

2.5V +-1.6%

2.5V +-1.6%

than 3.3V (eg for µC powersupply = 2.7V). When not in use, this pin
should be grounded. When in use, V

should not be connected.

S33

Overcurrent blank-out time 20 to 30ms settable through external RC.

analog input

The voltage at this pin is clamped at typically 5V. Trip voltage = 1.25V.

Rem = 0 means that the main SMPS is operational.
Connected to externalcapacitor to determine Trem (remote control

analog input

delay) timing. Trem (on to off) is 8ms typ. Trem (off to on) is 24ms typ.
Crem = 0.1µF

an opto-coupler. When PWM is low, the main SMPS is operational.
Connected to externalcapacitor for Power-on-reset timing.

analog input

Cpor = 2.2µF

the power is good for operation.

TSM111

5/18

TSM111

APPL ICATION DIAGRAM

6/18

TIMING DIAGRAM : remote control

TSM111

7/18

TSM111

TIMING DIAGRAM : overvoltage o r overcurrent shut -down

8/18

TSM111

AN EXAMP LE O F 90W MI CR O A T X
POWER SUPPLY USING L5991A, VI­PER2 0 AND TSM1 1 1

Protectionagainstaccidentalshort circuitsand fault
conditions is mandatory in PC power supplies.
These protection circuits can be realized by using
many discrete components which occupy a lot of
PCBspace,designtimeinfinetuningthecircuit and
also addto assemblingcosts.

ST’ssinglechipTSM111ICprovidescompletepro­tectioncircuits designeasier, with fewernumber of
components.TSM111 is an idealsupervisorIC for
PC powersupplies.

The salient featuresand benefits of this device are
listedbelow :

a)Overvoltageprotectionfor3.3V,5Vand12Vwith­out externalcomponent.

b) Over currentprotectionfor 3.3V,5V and 12V.
c) GeneratesPower Good signal.
d) Programmabletimingfor Power Good signal.
e) Wide range supply operating voltageup to 36V

(44VAMR).
f) Stableinternalvoltage reference.
g) Two 1.6% voltage referencefor Mainand Auxil-

iary regulation.
h) Few externalcomponents.
i) Circuitoccupieslittlespace on PCB.

j) Easyimplementation of thecircuit.

FEATURE DESCRIPTI ONS

a)Overvoltageprotectioncanbeimplementedwith­out anyadditionalcomponents.Overvoltagesense
levelsfor3.3V,5V,12Vare4V,6.1V,14.2Vrespec­tively. With very little tolerances,betterprotectionis
achieved.

b) Overcurrent protectioncan beimplementedwith
very small value sense resistors. As the current
sense thresholdlevels 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 goodsignal(pin9) isassertedto indi­cate the 5V and 3.3V is above the under voltage
thresholdlevel. PG pin goes high when the above
conditionis reached.Pull up resistorR27 (3.1K) is
connectedto 5V STDBY supplyfrom this pin.

d) The timing of thepowergood signalcan be con­trolledby adjustingthe valueofthechargingcapaci­tor on pin 10. With 2.2µF/16Vcapacitoron pin 10,
400msecturnon delayis achieved.

e) Thepower supplycanbe operatedfrom 14.5Vto
36V.TheV

mustalwaysbehigherthanthesupply

CC

voltageon the 12Vinput pin by 2V.i.e. if 14Vis ap­pearing12V inputpin the Vcc must be> 16V.

A COMPLETE P C SMPS SECO NDARY SUPE RVI SOR

9/18

TSM111

f) Two internal high precision TL431 shunt regula­torsarebuilt-in.Itprovidesstablereferencevoltages
with a voltageprecisionof 1.6%.

SUPERVISORY CIRCUIT O PERATION

The system power ON/OFF logic is generated by
the PC,whichis ”Low” insystem”On” conditionand
”High” when the systemis ”Off”. This is connected
to remotepin 7.

TheIC’sinternallogiccircuitgeneratesacontrolsig­nal on pin 6. In normal operation,whenthere is no
over voltageor over currentat the threeinputs, the
voltageon pin 6 follows the Remote pin 7 voltage,
i.e. if the remotepin7 is lowthe pin 6is alsolow or
viceversa.

When fault is detected on the inputs, control pin 6
goes ”High”. This controlpin 6 output canbe used
to turnoff theMains PowerSupplyduringfault con-

dition. An optocoupler is connected directly, with
cathodeconnectedto the IC pin6 andanode to

5V (from STDBYsupply).
In normal operation the voltage on pin 6 is (opto

cathode)is around3.7 V. On the primary side the
opto transistor collectoris pulled througha resistor
to Vref.

It is requiredto invertthe signal before connecting
to the feedbackcompensationpin 6 of L5991A for
reverse logic.i.e duringnormaloperationthe com­pensationpin is not affectedand duringfaultcondi­tionthe pinis pulledLow. Slightdelay (R34,C32)is
introducedonthe primary sideto avoidfaultturnon
condition.

Note : Once t he f ault condition is removed, it is requi r ed t o
reset t h e Remote pin to make t he system functi on again.

10/18

BILL OF MATERIAL

The following are the bill of material for the 90W SMPS :

No Part Number Qt Manufacturers Remarks/Descirptions

ICs

1 L5991A 1 ST Advanced PWM Controller
2 VIPer20DIP 1 ST Aux controller PWM+Mos
3 TSM111 1 ST Triple Voltage and Current Supervisor
4 LM7912CV 1 ST -12V Post Regulator
5 TL431 1 ST Programmable Voltage Reference

MOSFETs

6 STP6NB80 1 ST TO220 6A, 800V Mos
7 STP3020L 1 ST TO220 22mohm 30V Mos

Rectifiers

8 BYV10-40 1 ST 1A, 40V or BYV10-60 or BYW100-200
9 BYW100-200 3 ST 1A, 100V or 200V, BYW100-100

10 STPS20L40CT 1 ST 2x10A, 40V or STPS2045CT or

11 STSPS10L40CT 1 ST 2x5A, 40V
12 KAL04 1 - 3Amp 400VAC Bridge Rectifier or higher
13 1N4148 1 -

Transformers / Inductors

12 HM00-98150 1 BI Tech.** Aux Transformer
13 HM00-98151 1 BI Tech. Main Transformer
14 HM00-98148 1 BI Tech. Coupled inductors
15 HM50-150K 1 BI Tech. 15uH inductors - output filter
16 HM11-51502 1 BI Tech. 2.2uH Inductors - output filter
17 HM28-32022 1 BI Tech. Common Mode choke - AC input filter
18 10uH 1 - 10uH inductors - output filter

Connectors

19 AC input conn 1 ­20 20-pin conn:

39-01-2200
21 Fann connector 1 ­22 Fuse 3.5A 1 ­23 NTC 1 Siemens 2.2 ohm
24 TLP621 Optocoupler 3 Toshiba 100% transfer ratio
25 AC switch 1 ­26 115V-230V selector 1 -

1 Molex 20pin output connector with terminals

STPS30L40CT

Molex 39-00-0038

TSM111

11/18

TSM111

.... continued BILL OF MATERIAL

No Part Number Qt No Part Number Qt

Capacitors Resistors

27 47UF/25V 1 52 20K 1
28 3.9NF 1 53 47K,3W 1
29 .47UF/16V 1 54 100K,1/2W 2
30 1NF 2 55 5.1K 1
31 100UF/25 1 56 3 MOHM 1
32 .22UF/250V A.C 2 57 1OR 2
33 1000UF/10V 2 58 10 MOHM 1
34 3300UF/10 1 59 4.7K 5
35 470UF/16V 2 60 68K 1
36 2.2NF 2 61 680R 1
37 2.2UF/16 1 62 39K 1
38 470UF/25V 1 63 3.1K 1
39 4.7NF 4 64 470K 1
40 47UF/16V 1 65 100R 1
41 100UF/25V 3 66 10K 4
42 100UF/25V 1 67 3.3K 1
43 47NF 3 68 5 MOHM 1
44 220UF/200V 2 69 1K 1
45 1000UF/25V 1 70 330R 1
46 2.2UF 1 71 10,1/4W 2
47 1.5NF 1 72 470R 1
48 10NF 1 73 0.68 2
49 .1UF 1 74 6.8K 2
50 3.3NF 1
51 56NF 1

** BI T echnol o ies Pte Lt e

Phone No: 65 249- 1115
F ax No: 65 445-1983
Attn: Kelvin Lim, Sales Dept

12/18

TSM111

17V

C18

5VSTDBY

470uF/16V

L3
10uH

C35

+

D7

470uF/16

BYW100-200

6

7

T2

AUX TRANS

D5

D6

OPT

OPT

-12V

1

3

R43
C20

4.7K

470nF
R

X

C17

+

D8

100uF/25

BYW100-200

98

R9
47

D4

1N4148

2

Vcc

8

IC1

VIPER20

GND
3

1osc

comp4

7

DRAIN(out)

6

5

123456789

11121314151617181920

F

2

C40

1000uF/25V

D15

BYW100-200

12V

R
1K

L6
INDUCTOR

+

L2
COUPLEDINDUCTOR

D16
BYW100-200

T1

MAINSTRANS

1

C29

470uF/25V

R
680,1/2W

OUT

GND

IN

D13
BYW100-200

C

100uF/25V

IC7

2

L7912

C19

100uF/25V

D12

BYW100-200

12

64 3

R45

4.7K

IC10

TL431

GNDANALOG

R44
330

IC2

1

TLP621

2

34

1235

+

R

47uF/25V

8.2K

R15

5.1K
C13

C14

3.9nF

R16

4.7K

.47uF/16V
C16

1nF

5V

L4

2.2uH

R17
10

5

R10
47K

C3

+

220uF/200V

R11
100K,1/2W

NTC

2.2ohm
R28

470K

F1

3.5A

S1

CN1

SWSPST

CON1

CON3

10

CN3

R421KR38

C25

+

470uF/16V

C24

+

3300uF/10

D11
STPS2045CT C21

C12

4.7nF

VAR

C2

.22uF/250V A.CLF01

C1

.22uF/250V A.C

A.CINPUT

100V~240VA.C

12

3.3K

C38

R26
39K

47nF

C23

3.3V

1000uF/10V

Q3

C22

+

STP3020

1000uF/10V

D14

1N4148

D12
STP1060CT

2.2nF
R18

10

D3

21

OPT

D2

BYT11-800

C4

+

220uF/200V

R12
100K,1/2W

S2
SWSPST

D1

BRIDGE

R
OPT

PWOK

PSON/OFF

R29

R47
10K

R19
10mohm

C26

2.2nF

121110789

R23
680

IC4

12

43

TLP621

C9

C10

R10
10

D5
1N4148

C31

4.7nF
R9

4.7K

R8

6.8K

4.7nF

+

47uF/25V

R4
10

R
OPT

R17A

3.5mohm

R39
5mohm

9

14

15

R27

3.1K

R22
33K

12

C37
47nF
13

15

14

3

18

2

19

1

20

C34

100uF/25V

R13
10K

Q1
STP6NB80

R5
10

8

10 13 12

Vc

Vcc

OUT

DIS

DC-LIM

DC

R2

6.8K
C6

.1uF

4.7K
C41

2.2uF

910

FbAUX

PG

VrefAUX
FbMAIN

VrefMAIN

VS12

IS12
VS5

IS5

VS33

7

Tpor

REM

Trem

ADJ

TSM111

SUPERVISOR

IC6

Gnd

C51

8

100nF

R

4

20K

16

IS33

UV

11

D14
OPT

R24
10K

R7A
.22

R7A1

R7
D

1K

20V
R6
470

C11

1nF

SGNDPGND

L5991

16

C5

1.5nF

C55

10uF/35V

11

Tsur

17

C28

2.2uF/16

IC5

12

TLP621
R34

10K

R3
100

C7

3.3nF

IC3

6

L5991A

COMP

VFBSSSTBYRCTVREF

57

C8

56nF

PWM

34

C30

C32

R20

220uF/16V

4.7K

Q2
NPN1

4.7nF

+

Vcc

56

ISEN

IC3

234

13/18

TSM111

EVAL UATI ON BOARD - TECHNICAL NOTICE

TSM111 is a HousekeepingIC which is best used
in PC Switch Mode Power Suppliesfor secondary

3.3V,5V, and 12V power linesprotection.
TSM111integratesallthe necessaryfunctionsfor a

secure and reliable overcurrent and overvoltage
protection, as well as a logic interface for proper
communication with the motherboardand adjust­able timing circuitry for optimized sequencingman­agement. Moreover, TSM111 integrates two pre­ciseshuntvoltagereferencesfor direct optocoupler
drive. TSM111, integratingthe equivalent of more
than 25 discrete components,savesa lotof design
time and fine tuning, as well as PCB area, and in­creasesthereliabilityof thewhole application.

How to use the TSM111 EvaluationBoard?

Thisevaluation boardallows to adapt the TSM111
housekeepingchiptoanalreadyexistingPCPower
Supplyby simply choosingproper valuesfor it’sex­ternalcomponents,and makingthe adequatecon­nectionsto theI/O of the evaluationboard.

The ElectricalSchematicof theTSM111evaluation
boardis shownon figure1. It includesthe TSM111
as well as the minimum component number re­quiredto maketheTSM111 fitin a PCSMPS appli­cation.

Components calculations

Theovervoltageprotectionis notto be adjusted.In­ternalvoltage thresholdsare given by Vvs1, Vvs2,
Vvs3for respectiveprotectionof the 3.3V, 5V, 12V
powerlines.

Theovercurrentprotectionis given bythe choiceof
the Sense resistors R1, R2, R3 (respectively for
eachpowerline3.3V,5V,12V).Internalprecisevolt­age thresholdsdefinethe trippingvoltagedrops for
each linefollowingequations1, 2 & 3 :

Vcs1= R1 x I33 eq1
Vcs2= R2 x I5 eq2
Vcs3= R3 x I12 eq3
whereI33, I5, and I12 are the trippingcurrents.
The system will latch (Fault output will be active -

high)if the overcurrentlasts more than the author­izedsurge delay Tsurgiven by equations4 & 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
thresholdvoltage Vsur(2.5V).

R4=33kΩ, C1=4.7µF =>Tsur=21ms
Thanks to the Tsur adjustment, the normal surge

currents which occur during power up (capacitive

14/18

J3

Optaux

J16

VrefAux

J15

VrefMain

J7

IN12V

J6

In5V

J5

In3.3V

J1

Vdet

J2

Fault

J13
Vcc

J14
Gnd

EVALUATION BOARD - ELECTRICA L SCHEMATIC

Roptaux

1

19

Is5

Vs33

U1 TSM111

Vout

GND

1

R9

R2
rs5V

5Vstby

3

R10

R7

R8

Vcc

5

C6

RoptMain

R3
rs12V

2

18

Vs5

Is12

Gnd

16

C5

C4

3

14

15

Vs1 2

Vref Main

Adj

4

I

1INV

13

12

PG

FbAu x

Fbmain

Vref Au x

Tpor

Rem

TRem

8

R5 R rem

C2
Crem

5Vstby

9

10
7

1

Optaux

2

VrefAux

1
2

J18

1

OptMain

OptMain

1
2

1

1

1

1
2

1
2

1
2

1
2

2

VrefMain

In12V Out12V

In5V

11

17

6

20

Is33

UV
Tsur

PWM

U2 78L05

2

+

R1
rs3.3V

Vin

In3.3V

D1

Vdet

5Vstby

UV

R4
Rsur

R6

Fault

VCC

C1 Csur

C7

R11

Cpor

C3

Out5V

Out3.3V

PG 1

D6

From c

D5

SW1

5Vstby

12

34

BP Rem

1

1

1

2

1
2

1
2

J8
Out12V
J9
Out5V
J10
Out3.3V

J11
PG

J12
Rem

J20

TSM111

loadscharging)areblankedfor atimedependingon
eachapplication.

Whenthe systemhas latched(eitherafter overcur­rent or overvoltagecondition),thesystem needsto
beresetviatheRemoteinput.The C2capacitorde­terminestwo differenttimingsto 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 integratedpull up resistorof
100kΩ is to be taken into account in thechoice of
R5, knowingthat thethresholdvoltage of the input
comparatoris 1.4V. Therefore,R5 shouldbe lower
than38.8kΩ.

R5 = 1kΩ is agood value.

The evaluation board integrates the possibility to
maketheRemotesignaleithermanual,orelectronic
thanksto theORingdiodesD5 andD6 (andthepull
down resistor R5), and the Push Button (SW1).
Thesediodes can of course be replacedby 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
internalsupervision circuitry has stayedabove the
undervoltage 4.3V threshold for more than Tpor
timefollowing the approximatedequation6 :

C3 x Vth = Ic x Tpor eq6
whereVth is 2V and Ic is 20µA.
C3=2.2µF=> Tpor=300ms
Whenthe 5Vpower linepasses underthe4.3V un-

dervoltage threshold,the Power Good signal (PG)
fallsimmediately to low level.

ThePowerGoodoutputcanalsobetriggeredbythe
Vdet input of the board. This input should be con­nected to a power line representative of the AC
mainspowersituation.Asanexample,anadditional
windingonthe auxiliary powersupplyoffer an early
warningof power downfromthemainspowerpoint
of view. The UV threshold is internally fixed to
Vdet=1.26V. Therefore, it is necessary to add a
zenerdiodeD1.

D1=15Vzener=> Vdet=16.26V
Note that a 20kΩ serial pull down resistor is inte-

grated. Therefore, only a low power zener is
needed.

The Faultoutput needsa pullup resistorR6.
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.
ThisregulatorneedsaC6bypasscapacitor.TheC7
bypass capacitor smoothens the V

CC

pin of

TSM111.
TheAdj(Adjust)pinshouldbeconnectedto ground.

Adjust allows to tune a newovervoltageprotection
value (ex2.7V insteadof 3.3V).

Exampleof componentlists

Table 1 gives an example of componentlist

Name Type Value Comment

U1 IC TSM111 DIP20
U2 IC 78L05 TO92
R1 R 1/4W

R 1/2W
R1W

R2 R 1/4W

R 1/2W
R1W

R3 R 1/4W

R 1/2W

R1W
R4 R 1/4W 33kΩ
R5 R 1/4W 1kΩ
R6 R 1/4W 47kΩ
R7 R 1/4W depends on opto used
R8 R 1/4W 10k

R9 R 1/4W depends on opto used
R10 R 1/4W 10k

R11 R 1/4W 47kΩ
D1 Z 1/4W 15V
D5 D 1/4W 1N4148
D6 D 1/4W 1N4148
C1 C Electro 4.7µF
C2 C Plastic 100nF
C3 C Electro 2.2µF
C4 C Plastic 10NF comp. network to

C5 C Plastic 10NF comp. network to
C6 C Plastic 100nF

C7 C Electro 10µF

10mΩ
5mΩ

2.5mΩ
10mΩ

5mΩ

2.5mΩ
65mΩ

13mΩ

6.5mΩ

Ω

comp. network to

be fine tuned

Ω

comp. network to

be fine tuned

be fine tuned
be fine tuned

5A
10A
20A

5A
10A
20A

1A
5A
10A

Figures2a and 2b show thecopper and silkscreen
sidesof theEvaluationboardPCB.

Notethat it is not a 1/1scale.

15/18

TSM111

Figure 2a Figure 2b

16/18

PACKAG E MECHANI CAL DATA

20 PINS -PLAS TIC DIP

TSM111

Dimensions

a1 0.254 0.010

B 1.39 1.65 0.055 0.065

b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000
E 8.5 0.335

e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155

L 3.3 0.130

Z 1.34 0.053

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

17/18

TSM111

PACKAG E MECHANI CAL DATA

20 PINS -PLASTIC MICROPACKAGE (SO)

Dimensions

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

A 2.65 0.104
a1 0.1 0.3 0.004 0.012
a2 2.45 0.096

b 0.35 0.49 0.014 0.019

b1 0.23 0.32 0.009 0.013

C 0.5 0.020

c1 45

o

(typ.)
D 12.6 13.0 0.496 0.512
E 10 10.65 0.394 0.419

e 1.27 0.050

e3 11.43 0.450

F 7.4 7.6 0.291 0.299

L 0.5 1.27 0.020 0.050

M 0.75 0.030

S8

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support
devices or systems without express written approval of STMicroelectronics.

Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco

The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.

 The ST logo is a trademark of STMicroelectronics

 1999 STMicroelectronics – Printed in Italy – All Rights Reserved

STMicroelectronics GROUP OF COMPANIES

 http://www.st.com

o

(Max.)

18/18