WT7502V Datasheet | Weltrend Semiconductor

DESCRIPTION The WT7502V provides protection circuits, power good output (PGO), fault protection latch (FPOB), and a protection detector function (PSONB) control. It can minimize external ponents of switching power supply systems in personal puter. The Over Voltage Detector (OVD) monitors V33, V5 and VCC input voltage level. The Under Voltage Detector (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 2.4 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 Voltage Detector (OVD) monitors V33, V5 and VCC input voltage. - The Under Voltage Detector (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 and UVD internal signal De- glitches. - 55 us for OVD internal signal De- glitches. - 2.4 ms time delay for PSONB turn-off FPOB. - The UVD would been disabled when PGI < 0.95V. PIN ASSIGNMENT AND PACKAGE TYPE ORDERING INFORMATION PACKAGE 8- Pin Plastic DIP Green WT7502V- NG084 8- Pin Plastic SOP WT7502V- SG084 Weltrend Semiconductor, Inc. Page 2 PIN DESCRIPTION Pin Name TYPE PGI I FPOB PSONB V33 I V5 I Description...