ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢉ
Weltrend Semiconductor, Inc.
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WT7515
GENERAL DESCRIPTION
The WT7515 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 3.3V, 5V, 12V input voltage level. The Over
Current Detector (OCD) monitor IS33, IS5, IS12 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
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The Over / Under Voltage Detector (OVD / UVD) monitors 3.3V, 5V, 12V input voltage level.
The Over Current Detector (OCD) monitors IS33, IS5, IS12 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
WT7515–140WT
WT7515–141WT
WT7515–142WT
1
2
3
4
5
6
7
14
13
12
11
10
9
1
2
3
4
5
6
7
14
13
12
11
10
9
1
2
3
4
5
6
7
14
13
12
11
10
9
PGI
PGO
VCC
V5
PGI
PGO
VCC
V5
PGI
PGO
VCC
V5
GND
GND
GND
FPOB
PSONB
IS12
FPOB
PSONB
IS12
FPOB
PSONB
IS12
V33
V12
IS33
IS5
V33
V33
V12
IS33
IS5
VCC2
V12
RI
RI
RI
NC
IS5
VCC2
8
8
8
IS33
ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢅꢆꢉꢊꢋ24ꢌ2ꢍ
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
Email:support@weltrend.com.tw
