|【 General Description 】|
|The WT7505 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 V12 input voltage level. The Over Current Detector (OCD) monitor I33&V33, I5&V5 and I12&V12 input current sense. When OVD or UVD or OCD 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 and OCD detect the right voltage level, the power good output (PGO) will be issue.
|【 Features 】|
|●||The Over Voltage Detector (OVD) monitors V33, V5 and V12 input voltage.|
|●||The Under Voltage Detector (UVD) monitors V33, V5 and V12 input voltage.|
|●||The Over Current Detector (OCD) monitors I33&33, I5&V5 and I12&V12 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 / OCD.|
|●||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.|
|●||10 ms for OCD internal signal De–glitches.|
|●||3.5 ms time delay for PSONB turn-off FPOB.|
|●||Package: SOP/DIP 14|