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WT7502 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - PC POWER SUPPLY SUPERVISOR - Weltrend Semiconductor

भाग संख्या WT7502
समारोह PC POWER SUPPLY SUPERVISOR
मैन्युफैक्चरर्स Weltrend Semiconductor 
लोगो Weltrend Semiconductor लोगो 
पूर्व दर्शन
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WT7502 pdf
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WT7502
Rev. 1.01
GENERAL DESCRIPTION
The WT7502 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 and VCC input voltage level.
When OVD or UVD detect the fault voltage level, the FPOB is latched HIGH and PGO go low. When
PGI detect the fault voltage level, the FPOB would be kept LOW and PGO go low. The latch can be
reset by PSONB go HIGH. There is 3.5 ms delay time for PSONB turn off FPOB.
When PGI and OVD and UVD detect the right voltage level, the power good output (PGO) will be
issue.
FEATURES
The Over / Under Voltage Detector (OVD / UVD) monitors V33, V5 and VCC input voltage.
Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
75 ms time delay for UVD.
300 ms time delay for PGO.
38 ms for PSONB input signal De–bounce.
73 us for PGI / UVD internal signal De–glitches.
55 us for OVD internal signal De–glitches.
3.5 ms time delay for PSONB turn-off FPOB.
The UVD would been disabled when PGI < 1.2V.
PIN ASSIGNMENT AND PACKAGE TYPE
WT7502
PGI
GND
FPOB
PSONB
1
2
3
4
8 PGO
7 VCC
6 V5
5 V33
ORDERING INFORMATION
PACKAGE
8–Pin Plastic DIP 8–Pin Plastic SOP
CHIP
WT7502–N084
WT7502–S084
Lead–FreePbWT7502–N084 Pb WT7502–S084 Pb
WT7502-HXXX
The Top-Side Marking would be added a dot(●)in the right side for lead-free package.
Weltrend Semiconductor, Inc.
Page 2
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