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TSM111CNST ?N/a31avaiTRIPLE VOLTAGE AND CURRENT SUPERVISOR
TSM111CDTSTN/a3999avaiTRIPLE VOLTAGE AND CURRENT SUPERVISOR
TSM111CDSTN/a3000avaiTRIPLE VOLTAGE AND CURRENT SUPERVISOR


TSM111CDT ,TRIPLE VOLTAGE AND CURRENT SUPERVISORABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit1)V44 VCC DC Supply Voltage pin 5 IOutput ..
TSM111CN ,TRIPLE VOLTAGE AND CURRENT SUPERVISORTSM111TRIPLE VOLTAGE AND CURRENT SUPERVISOR ■ OVERVOLTAGE PROTECTION FOR 3.3V, 5V AND 12V WIT ..
TSM1121ID ,3.3V 5V 12V HOUSEKEEPING ICELECTRICAL CHARACTERISTICS Tamb = 25°C and Vcc = 17V (unless otherwise specified) Symbol Par ..
TSM1121IN ,3.3V 5V 12V HOUSEKEEPING ICfeatures which allow safeoperation in all conditions, and very high systemVS12 3 12 PGintegration. ..
TSM112CD ,3.3V 5V 12V HOUSEKEEPING ICfeatures which allow safe oper-ation in all conditions, and very high system inte- VS5 2 13 FAULTgr ..
TSM112CD ,3.3V 5V 12V HOUSEKEEPING ICABSOLUTE MAXIMUM RATINGS Symbol DC Supply Voltage Value Unit1)Vcc 25 VDC Supply Voltage Iout O ..
UC282TD-1 ,1maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
UC282TD-3 ,1maximum ratings over operating free-air temperature (unless otherwise noted)VB . . . . . . . . . . ..
UC282TD-ADJ ,1maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
UC282TDKTTT-1 ,1electrical characteristics, T = −40°C to 100°C for the UC282-X series and 0°C to 100°C for theAUC38 ..
UC282TDKTTT-1 ,1electrical characteristics, T = −40°C to 100°C for the UC282-X series and 0°C to 100°C for theAUC38 ..
UC282TDKTTT-ADJ ,1maximum ratings over operating free-air temperature (unless otherwise noted)VB . . . . . . . . . . ..


TSM111CD-TSM111CDT-TSM111CN
TRIPLE VOLTAGE AND CURRENT SUPERVISOR
�OVERVOLTAGE PROTECTION FOR 3.3V, 5V
AND 12V WITHOUT EXTERNAL COMPO-
NENTS OVERCURRENT PROTECTION FOR 3.3V,
5V AND 12V WITH INTERNAL THRESHOLD
VOLTAGE POWER GOOD CIRCUITRY GENERATES POWER GOOD SIGNAL REMOTE ON/OFF FUNCTION PROGRAMMABLE TIMING FOR POWER
GOOD SIGNAL 14.5V TO 36V SUPPLY VOLTAGE RANGE TWO 1.6% VOLTAGE REFERENCES FOR
MAIN AND AUXILIARY CONVERTER REG-
ULATION LOOPS
DESCRIPTION

The TSM111 integrated circuit incorporates all
sensing circuit to control a triple output power sup-
ply. It includes voltage references , comparators
and matched resistors bridge for overcurrent and
overvoltage detection without the need of any ex-
ternal components. Timing generator with external
capacitors, control turn On and Off delays. It pro-
vides an integrated and cost effective solution for
simultaneous multiple voltage control.
APPLICATION

This circuit is designed to be used in SMPS for
Desktop 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.

ORDER CODE
N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
TSM111

TRIPLE VOLTAGE AND CURRENT SUPERVISOR
TSM111
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
All voltages values, except differential voltage are with respect to network ground terminal. 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 13.2Vis present on the Is12 input, the minimum required value on VCC is 15.2V.
TSM111
ELECTRICAL CHARACTERISTICS

VCC = 16V, Tamb = 0°C to 70°C (typical values given for 25°C)
VOLTAGE REFERENCE, AUXILIARY CONVERTER (Fbaux)
VOLTAGE REFERENCE, MAIN CONVERTER (Fbmain)
TSM111
POWER GOOD SECTION
REMOTE On/Off
TSM111
PIN DESCRIPTION
TSM111
APPLICATION DIAGRAM
TSM111
TIMING DIAGRAM : remote control
TSM111
TIMING DIAGRAM : overvoltage or overcurrent shut-down
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 sup-
plies. These protection circuits can be realized by
using many discrete components which occupy a
lot of PCB space, design time in fine tuning the cir-
cuit and also add to assembling costs.
ST’s single chip TSM111 IC provides complete
protection circuits design easier, with fewer num-
ber 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 protection for 3.3V, 5V and 12V
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 Aux-
iliary regulation.
h) Few external components.
i) Circuit occupies little space on PCB.
j) Easy implementation of the circuit.
FEATURE DESCRIPTIONS

a) Over voltage protection can be implemented
without any additional components. Overvoltage
sense levels for 3.3V, 5V, 12V are 4V, 6.1V, 14.2V
respectively. With very little tolerances, better pro-
tection is achieved.
b) Over current protection can be implemented
with very small value sense resistors. As the cur-
rent sense threshold levels are set very low, regu-
lation 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 in-
dicate 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 con-
trolled by adjusting the value of the charging ca-
pacitor on pin 10. With 2.2μF/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.
f) Two internal high precision TL431 shunt regula-
tors are built-in. It provides stable reference volt-
ages with a voltage precision of 1.6%.
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