WT7527V データシートの表示（PDF） - Weltrend Semiconductor

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WT7527V

PC POWER SUPPLY SUPERVISOR

Weltrend Semiconductor 

WT7527V

Rev. 1.01

GENERAL DESCRIPTION

The WT7527V 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 Voltage Detector (OVD) monitors VX, V33, V5, V12A and V12B input voltage level. The

Under Voltage Detector (UVD) monitors V33, V5, V12A and V12B input voltage level. The Over Current

Detector (OCD) monitor I33&V33, I5&V5, I12A&V12A and I12B&V12B input current sense. The pin VX

provides an extra protection function. When OVD or UVD or OCD or VX 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 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 Voltage Detector (OVD) monitors VX, V33, V5, V12A and V12B input voltage.

• The Under Voltage Detector (UVD) monitors V33, V5, V12A and V12B input voltage.

• The Over Current Detector (OCD) monitors I33&33, I5&V5, I12A&V12A and I12B&V12B input pins.

• The VX > 1.2V provide an extra protection.

• Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.

• 75 / 600 ms time delay for UVD / OCD / VX .

• 300 ms time delay for PGO.

• 38 ms for PSONB input signal De–bounce.

• 14 us for OVD internal signal De–bounce.

• 60 us for UVD / VX internal signal De–bounce.

• 20 ms for OCD internal signal De–bounce.

• 73 us for PGI internal signal De–bounce.

• 4 ms for PSONB turn-off FPOB.

PIN ASSIGNMENT AND PACKAGE TYPE

Pin assignment

PGI

GND

FPOB

PSONB

I12A

RI

I12B

V12B

WT7527V

1 16

2 15

3 14

4 13

5 12

6 11

7 10

89

PGO

VCC

V5

V33

V12A

I33

I5

VX

Weltrend Semiconductor, Inc.

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