TSM115
3.3V
+
5V
±
12V Housekeeping IC
PRELIMINARY DATA
s
s
s
s
s
s
s
s
s
Over voltage and under voltage protection
for 3.3V +5V and ±12V without external
components
Over current protection for 3.3V 5V and
12V with external components
Under voltage blanking fonction
Power good input/output
Externally adjustable PG delay
Fault output
Remote output
Externally adjustable remote delay
2kV ESD protection
N
DIP-20
(Plastic Package)
D
SO-20
(Plastic Micropackage)
PIN CONNECTIONS
(top view)
1
2
3
4
5
6
7
8
9
Fault
Gnd
nc
PG
Tuv/Tpg
Rem
Vcc 20
Rcrnt 19
nc 18
Is3.3 17
Vs3.3 16
Is12 15
DESCRIPTION
The TSM115 integrated circuit incorporates all
sensing circuitry to protect from over and under
voltage and over current a multiple output power
supply (3.3V, +5V and ±12V).
TSM115 incorporates all the necessary functions
for Housekeeping features which allow safe
operation in all conditions, and very high system
integration.
Trem/Tsur Vs-12 14
nc
Bsense
Vs12b 13
Vs12a 12
Is5 11
APPLICATION
s
PC SMPS Multiple Power Line
Housekeeping IC (3.3V +5V ±12V)
10 Vs5
ORDER CODE
Part Number
TSM115CN
TSM115CD
Temperature Range
0 to 95°C
Package
DIP
SO
Packaging
Tube
Tube or Tape & Reel
Marking
TSM115C
M115
July 2004
1/17
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TSM115
1
Pin Description
Name
Fault
Gnd
PG
Pin #
1
2
4
Type
Open collector
Power supply
Open collector
Function
Pin Description
Tuv/Tpg
5
Timing capacitor
Rem
6
Control Input pin
Trem/Tsur
7
Timing capacitor
Bsense
Vs5
Is5
Vs12a
Vs12b
Vs-12
Is12
Vs3.3
Is3.3
Rcrnt
Vcc
9
10
11
12
13
14
15
16
17
19
20
Control input pin
Analog input
Analog Input
Analog input
Analog input
Analog input
Analog Input
Analog input
Analog Input
Analog input
Power supply
Fault
output. Output of the over voltage and under voltage comparators.
Signal ground and silicon substrate
Output of the
Tpg
comparator. This pin goes low upon an under voltage
condition. Except for the delay set by the
Tpg
capacitor this pin always
reflects the actual state of the under voltage sensing comparators output.
A capacitor from this pin to
Gnd
provides a delay between outputs rail volt-
age within regulation and
PG
output going high. Capacitor discharges
whenever
Bsense
low or
Rem
high or UVP is detected.
This capacitor will also provide the under voltage blanking function when
the voltage at this pin is larger than the
Vref
voltage. The under voltage
function resume.
Pulling this pin high will send the
Fault
pin high latching off the power sup-
ply, reset the internal latch, discharge the start-up timing capacitors,
Tuv
and
Tpg
capacitors, allowing normal start up of the system. Pulling this pin
low will send the
Fault
pin low, initiating a normal start up function.
A capacitor from this pin to
Gnd
will delay the
Fault
signal when the
Rem
pin is used to shut down the power supply. The
PG
will signal a power fail-
ure warming immediately, but the
Fault
pin shut down of the power will be
delayed. This capacitor will also provide the overcurrent blanking function
(surge current).
Non inverting input to the
Bsense
voltage sensing comparator. Pulling this
pin lower than 2.5V will cause
PG
goes low and
Tuv
goes low.
Over voltage and under voltage detection for +5V rail
5V overcurrent control sense input.
Over voltage and under voltage detection for +12V rail
Over voltage and under voltage detection for +12V rail
Over voltage and under voltage detection for -12V rail.
12V overcurrent control sense input.
Over voltage and under voltage detection for 3.3V rail.
3.3V overcurrent control sense input.
A resistor from this pin to
Gnd
will provide the internal constant current.
Supply input voltage
ABSOLUTE MAXIMUM RATINGS
Symbol
Vcc
Vpmax
Vnmax
VDBTT
VTER
PT
Tstg
Tj
ESD
DC Supply Voltage
DC Supply Voltage
1
Terminal voltage Vs3.3, Is3.3, Vs12, Is12, Vs5, Is5
Terminal voltage Vs-12
VTpg/Tuv, VTrem/Tsur input voltage
Other terminals
Power dissipation
Storage temperature
Junction temperature
Electrostatic Discharge
Value
-0.3 to 18
-0.3 to 18
-15 to 5
-0.3 to 3.3V
-0.3 to Vcc
1
-55 to 150
150
2
Unit
V
V
V
V
V
W
°C
°C
kV
1) All voltage values, except differential voltage are with respect to network ground terminal.
OPERATING CONDITIONS
Symbol
Vcc
Toper
DC Supply Conditions
Temperature range
Parameter
Value
3 to 15
0 to 95
Unit
V
°C
2/17
Electrical Characteristics
2
Electrical Characteristics
Symbol
Parameter
Test Condition
Min
Typ
Max
TSM115
Tamb = 25°C, Vcc=5V, Vs3.3=3.3V, Vs5=5V, Vs12= 12V, Vs-12=-12V, Rem=Low, Rcrnt=12kΩ
Unit
Total Current Consumption
Icc
Iccstdby
Vccmin
Total Supply Current
Total Supply Current in Stand-by Condi- Rem=high
tions
Vs3.3=0V, Vs5=0V
Min operating Vcc
Vs12=0V, Vs-12=0V
Tmin < Tamb < Tmax
1
1
3
mA
mA
V
Over Voltage and Under Voltage Protection
Vov12
Vuv12
Iin12b
Vov5
Vuv5
Iin5
Dis5
Vov3.3
Vuv3.3
Iin3.3
Vov-12
Vuv-12
Iin-12
Dis-12
Over Voltage Sense 12V
Under Voltage Sense 12V
Input current Voltage sense 12V
Over Voltage Sense 5V
Under Voltage Sense 5V
Input current Voltage Sense 5V
Disable Voltage Sense 5V
Over Voltage Sense 3.3V
Under Voltage Sense 3.3V
Input current Voltage Sense 3.3V
Over Voltage Sense -12V
Under Voltage Sense -12V
Input current Voltage sense -12V
Disable Voltage Sense -12V
13.6
8.85
50
6.01
4.00
50
7
3.88
2.52
25
-15.49
-9.99
-200
14
9.12
100
6.20
4.12
100
7.5
4.00
2.60
50
-15.04
-9.70
-100
3.3
14.4
9.39
200
6.39
4.24
200
8
4.12
2.68
100
-14.59
-9.41
-50
V
V
µA
V
V
µA
V
V
V
µA
V
V
µA
V
Internal delay time
Tdelay
Internal time
30
37
45
µs
Over current Protection
Is3.3
Vicm3.3
Vio3.3
Is5
Vicm5
Vio5
Is12
Vicm12a
Vio12a
Vicm12b
Vio12b
Iin12a
Bsense
Thbs
Ilbs
Iobs
DIobsT
Vbsoh
Iclbs
Vinbs
Bsense voltage threshold
Bsense current leakage
Current source
Current source drift in temperature
Clamp voltage
Clamping current
Input voltage
1.218
Bsense=1V
Bsense=1.5V
Tmin < Tamb < Tmax
IoBsense=1µA
Bsense > 2.5V
Tmin < Tamb < Tmax
90
2.00
3
-0.3
0
100
5
2.15
3.6
1.282
1
110
2.30
5
2.5
V
µA
µA
µA
V
mA
V
Current source
Input common mode
Input offset voltage
Current source
Input common mode
Input offset voltage
Current source
Input common mode
Input offset voltage
Input common mode
Input offset voltage
Input current
46
0.7
46
0.7
46
0.7
0.7
2
10
50
2
50
2
50
2
54
Vov3.3
3
54
Vov5
3
54
Vov12
3
Vov12
3
µA
V
mV
µA
V
mV
µA
V
mV
V
mV
µA
3/17
TSM115
Electrical Characteristics
Symbol
Parameter
High threshold
Low threshold
Test Condition
From Low to high
From high to low
Min
1.87
1.0
Typ
1.93
1.25
Max
1.99
1.4
Unit
V
V
Rem
THrm
TLrm
Power Good (PG)
Ipgol
Vpgol
Tpgr
Sink current
Low output voltage
Rise time PG
VPg=0.4V
Ipg=10mA
Rpg=1K
10
0.4
500
mA
V
ns
Under Voltage Blanking (Tuv) and Power Good (Tpg) times
Iotuvtpg
THtuv
TLtuv
THtpg
TLtpg
Idtuvtpg
Vtuvtpgol
Vtuvtpgoh
VinTuvTpg
DIotuvtpg
Current output source
High threshold blanking
Low threshold blanking
High threshold power good
Low threshold power good
Current discharge of TuvTpg
Low output voltage
Clamp voltage
Input voltage
Current source drift in temperature
Vtuvtpg = 0V
From low to high voltage
From high to low voltage
From low to high voltage
From high to low voltage
Iotutpg = 1mA
2.1
-0.3
Tmin < Tamb < Tmax
2.3
4.5
0.287
1.218
0.9
2
5
0.312
0.25
1.25
1
5
5.5
0.337
1.282
1.1
0.2
2.5
2.3
1
µA
V
V
V
V
mA
V
V
V
µA
Remote (Trem) and Surge current blanking (Tsur) times
Iotrm
Iotsur
THtrm
TLtrm
Idtrmtsur
Vtrmtsurol
Vtrmtsuroh
Vintrmtsur
DIotrm
DIotsur
Fault
Ifltol
Vfltol
THVcc
TLVcc
HystVcc
Rcrnt
VRcrn
Output voltage
1.20
1.25
1.30
V
IFault sink current
Low output voltage
High threshold voltage, Vcc low to high
Low threshold voltage, Vcc high to low
Vcc hysteresis : THVcc-TLVcc
VFault=0.4V
IFault=10mA
Rem low, all lines between
UV and OV.
10
0.4
2.95
2.65
TBD
mA
V
V
V
mV
TRem current source
Tsur current source
High thresold voltage TRem
Low thresold voltage TRem
Current discharge of TRemTsur
Low output voltage
Clamp voltage
Input voltage
Current source drift in temperature
Current source drift in temperature
Vtrmtsur = 0V
Vtrmtsur = 0V
From low to high
From high to low
Iotmtsur = 1mA
2.1
-0.3
Tmin < Tamb < Tmax
Tmin < Tamb < Tmax
2.3
90
9
1.218
0.9
2
100
10
1.25
1
5
110
11
1.282
1.1
0.2
2.5
2.3
5
500
µA
µA
V
V
mA
V
V
V
µA
nA
TBD
300
4/17
Electrical Characteristics
Fig. 1: Application Schematic
TSM115
Primary
Rectification
MAIN
Converter
12V
5V
3.3V
-12V
PWM + OPTO
+ Vref
Auxiliary
converter
PWM + OPTO
+ Vref
Over & Undervoltage Protection
Logic
FAULT
Sequencer
TSM115
PG
REM
Fig. 2: Internal Bloc Schematic
POWER SUPPLY
12V
5V
3.3V
rsc12b
rsc12a
Vs12a
Vs5
TSM115
FAULT
TO PWM
Crem
TO MOTHERBOARD
Vs3.3
OVP
rsc3.3
rsc5
UVP
Rocp12V Is12
Rocp5V
OCP
Is5
LOGIC
BLOCK
MAIN POWER SUPPLY
PG
Rem
Trem/Tsur
Tuv/Tpg
Cpg
Gnd
12V
5V
3.3V
-12V
Rocp3.3V Is33
Vs-12
Bsense
Rcrnt
ybtsV
12V
Vs12b
Rocp3.3
5Vstby
Rocp12
Rocp5
ybtsV
b21csr
rsc12a
rsc5
rsc3.3
12V
12V
5V
3.3V
-12V
ccV
ybtsV5
5/17
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