SUPPLY SUPERVISOR. WT7525 Datasheet

WT7525 SUPERVISOR. Datasheet pdf. Equivalent


Weltrend Semiconductor WT7525
Weltrend Semiconductor, Inc.
`
WT7525
PC POWER SUPPLY SUPERVISOR
Data Sheet
REV. 0.20
March 08, 2004
The information in this document is subject to change without notice.
©Weltrend Semiconductor, Inc. All Rights Reserved.
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WT7525 Datasheet
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Part WT7525
Description PC POWER SUPPLY SUPERVISOR
Feature WT7525; °¶¸à¹q¤lªÑ¥÷¦³--¤½¥q Weltrend Semiconductor, Inc. ` WT7525 PC POWER SUPPLY SUPERVISOR Data Sheet .
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Weltrend Semiconductor WT7525
WT7525
Rev. 0.20
GENERAL DESCRIPTION
The WT7525 provides protection circuits, power good output (PGO), fault protection latch (FPOB),
and a protection detector function (PSONB) control. It can minimize external components of switching
power supply systems in personal computer.
The Over / Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A and V12B input voltage
level. The Over Current Detector (OCD) monitor IS33, IS5, IS12A and IS12B input current sense. When
OVD or UVD or OCD detect the fault voltage level, the FPOB is latched HIGH and PGO go low. The
latch can be reset by PSONB go HIGH. There is 2.4 ms delay time for PSONB turn off FPOB.
When OVD and UVD and OCD detect the right voltage level, the power good output (PGO) will be
issue.
FEATURES
The Over / Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A and V12B input voltage
level.
The Over Current Detector (OCD) monitors IS33, IS5, IS12A and IS12B input current sense.
Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
75 / 300 ms time delay for UVD.
300 ms time delay for PGO.
38 ms for PSONB input signal De–bounce.
73 us for internal signal De–glitches.
2.4 ms time delay for PSONB turn-off FPOB.
PIN ASSIGNMENT AND PACKAGE TYPE
Pin assignment
WT7525-140
PGI 1 14
GND 2 13
FPOB 3 12
PSONB 4 11
IS12AB 5 10
RI 6
9
V12B 7
8
PGO
VCC
V5
V33
V12A
IS33
IS5
WT7525-160
PGI 1 16
GND 2 15
FPOB 3 14
PSONB 4 13
IS12A 5 12
RI 6 11
NC 7 10
V12B 8 9
WT7525-161
PGO
PGI 1 16
VCC
GND 2 15
V5 FPOB 3 14
V33 PSONB 4 13
V12A IS12A 5 12
IS33
RI 6 11
IS5 IS5 7 10
IS12B V12B 8 9
PGO
VCC
V5
V33
VCC2
V12A
IS33
IS12B
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Weltrend Semiconductor WT7525
WT7525
Rev. 0.20
ORDERING INFORMATION
Package type
ORDERING INFORMATION
14–Pin Plastic DIP WT7525N140
14–Pin Plastic SOP WT7525S140
16–Pin Plastic DIP WT7525N160
16–Pin Plastic SOP WT7525S160
16–Pin Plastic DIP WT7525N161
16–Pin Plastic SOP WT7525S161
PIN DESCRIPTION
Pin Name TYPE
PGI I
GND
P
FPOB
O
PSONB
I
IS12A
I
IS12AB
I
RI I
V12B
I
IS12B
I
IS5 I
IS33
I
V12A
I
VCC2
I
V33 I
V5 I
VCC
I
PGO
O
Description
Power good input signal pin
Ground
Fault protection output pin, open drain output
On/Off switch input
12VA over current protection sense input
12VAB over current protection sense input
Current sense adjust input
12VB over/under voltage input pin
12VB over current protection sense input
5V over current protection sense input
3.3V over current protection sense input
12VA over/under voltage input pin
Current sense power supply
3.3V over/under voltage input pin
5V over/under voltage input pin
Power supply
Power good output signal pin, open drain output
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