SGS Thomson Microelectronics TSM111 Datasheet

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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 %

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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

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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