TSM111
TRIPLE VOLTAGE AND CURRENT SUPERVISOR
s
OVERVOLTAGE PROTECTION FOR 3.3V, 5V
AND 12V WITHOUT EXTERNAL COMPO-
NENTS
s
OVERCURRENT PROTECTION FOR 3.3V,
5V AND 12V WITH INTERNAL THRESHOLD
VOLTAGE
N
DIP20
(Plastic Package)
s
POWER GOOD CIRCUITRY
s
GENERATES POWER GOOD SIGNAL
s
REMOTE ON/OFF FUNCTION
s
PROGRAMMABLE TIMING FOR POWER
GOOD SIGNAL
s
14.5V TO 36V SUPPLY VOLTAGE RANGE
s
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.
D
SO20
(Plastic Micropackage)
ORDER CODE
Package
Part Number
Temperature Range
N
TSM111C
Example :
TSM111CD
0, +70°C
•
D
•
N =
Dual in Line Package (DIP)
D =
Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS
(top view)
Vs33
Vs5
Vs12
ADJ
Vcc
PWM
REM
Trem
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
Tsur
GND
FbMAIN
VrefMAIN
VrefAUX
FbAUX
UV
January 2003
1/17
TSM111
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
I
out
P
d
T
stg
ESD
I
in
V
ter
I
1
I
2
DC Supply Voltage pin 5
1)
Output Current Power Good and PWM
Power Dissipation
Storage Temperature Range
Electrostatic Discharge
Input Current
Minimum voltage on all pins with respect to ground terminal
Maximum continuous current in all pins (except pin 5)
Max peak current in all pins for latch-up free operation
Parameter
Value
44
30
1
-55 to +150
2
50
-0.3
±10
±200
Unit
V
mA
W
°C
kV
mA
V
mA
mA
1. All voltages values, except differential voltage are with respect to network ground terminal.
OPERATING CONDITIONS
Symbol
V
CC
T
oper
I
k
DC Supply Voltage pin 5
1)
Operating Free Air Temperature Range
Operating Cathode Current, Vrefaux and Vrefmain
Parameter
Value
15 to 36
0 to +70
30
Unit
V
°C
mA
1. 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 V
CC
is 15.2V.
2/17
TSM111
ELECTRICAL CHARACTERISTICS
V
CC
= 16V, T
amb
= 0°C to 70°C (typical values given for 25°C)
Symbol
I
CC
V
cs1
V
cs2
V
cs3
V
iscm
V
vs1
V
vs2
V
vs3
V
Adj
V
sur
T
sur
V
surend
V
pull
Parameter
Total Supply 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
Projection
ADJ Input pin 4
Thereshold Voltage (T
sur
input)
T
sur
Timing with Determined External
Components
Tsur Input Clamp Voltage
Input Pulled Down Voltage for V33, V5
and V12
I
sink
= 100µA,
REMOTE high
33kΩ to VCC, 4.7µF to
ground
see note 2
Test Condition
PG low
46.5
46.5
60.5
0
3.8
5.8
13.4
1.22
2.4
4
6.1
14.2
1.26
2.5
21
7
8
0.4
Min.
Typ.
5
50
50
65
Max.
10
53.5
53.5
69.5
VCC -2
4.2
6.4
15
1.3
2.6
Unit
mA
mV
mV
mV
V
V
V
V
V
V
ms
V
V
VOLTAGE REFERENCE, AUXILIARY CONVERTER (Fbaux)
Symbol
V
refaux
I
aux
T
aux
R
egliaux
I
outaux
Parameter
Reference Voltage
Current Stability
Temperature Stability
Line Regulation
Output Sinking Current Capability
15 < V
CC
< 36V
V
out
> 2V
15
1
25
Test Condition
I
r
= 0.5mA, T
amb
= 25°C
I
r
= 0.5mA to 10mA
Min.
2.46
Typ.
2.5
Max.
2.54
20
17
Unit
V
mV
mV
mV/V
mA
VOLTAGE REFERENCE, MAIN CONVERTER (Fbmain)
Symbol
V
refmain
I
main
T
main
R
eglimain
I
outmain
Resp
Parameter
Reference Voltage
Current Stability
Temperature Stability
Line Regulation
Output Sinking Current Capability
Absolute Precision of the Internal Resis-
tor Connected to V
refmain
(39k, 10k, 5.4k)
Matching of the Internal Resistors Con-
nected to V
refmain
(39k, 10k, 5.4k)
15 < V
CC
< 36V
V
out
> 2V
15
1
25
±15
Test Condition
I
r
= 0.5mA, T
amb
= 25°C
I
r
= 0.5mA to 10mA
Min.
2.46
Typ.
2.5
Max.
2.54
20
17
Unit
V
mV
mV
mV/V
mA
%
Resm
±1
%
3/17
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 = 2.2µF
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
Test Condition
Ic = 20µA typ.,
Vth = 2V typ.
Min.
100
12
1.8
20
200
1.22
Typ.
300
20
2
40
250
1.26
20
4.1
C
L
= 100pF
4.3
1
300
0.4
1
4.5
Max.
500
28
2.2
80
Unit
ms
µA
V
mV
mV
V
kΩ
V
µs
ns
V
µA
1.3
C
L
= 100pF
PG Output Fall Time
Power Good Output Saturation Level
Ic = 15mA
Power Good Leakage Current Collector V
out
= 5V
REMOTE On/Off
Symbol
Vrem
Iil
Vol1
Ioh1
Vih1
Trem1
Trem2
Parameter
Test Condition
Min.
1
Typ.
Max.
1.8
1
1.3
1
4.2
4
16
8
24
5.25
14
34
Unit
V
mA
V
µA
V
ms
ms
Remote On/Off Input Threshold Level
Remote Input Low Driving Current
Remote Ouput (PWM) Saturation Level Ic = 0.5mA
Remote Output (PWM) Collector
Vout = 5V
Leakage Current
Remote Input Voltage Level
Pin 7 open
Timing On to Off in to On/Off
out, Cext = 100,F
Timing Off to On in to On/Off
out, Cext = 100nF
4/17
TSM111
PIN DESCRIPTION
Name
Pin
Type
Function
Positive supply voltage. The DC supply voltage must be higher than the maxi-
mum 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
µC
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
µC,
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) tim-
ing. Trem (on to off) is 8ms typ. Trem (off to on) is 24ms typ.
Crem = 0.1µF
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 = 2.2µF
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.
Vcc
5
supply
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
program.
analog input
logic input
program.
analog input
logic output
program.
analog input
analog input
logic input
supply
Tsur
Rem
17
7
Trem
8
PWM
Tpor
UV
PG
GND
6
10
11
9
16
5/17
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