WT7524数据手册Weltrend中文资料规格书

描述 Description

The WT7524 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 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. 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 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.

特性 Features

• The Over Voltage Detector (OVD) monitors 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.
• Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
• 75 ms time delay for UVD / OCD.
• 300 ms time delay for PGO.
• 38 ms for PSONB input signal de-bounce.
• 14 us for OVD internal signal de-bounce.
• 3ms 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.
• The VX>1.25V provide an extra protection.