WT7507T数据手册Weltrend中文资料规格书

描述 Description

The WT7507T-T1 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 Protector (OVP) monitors V33, V5, V12A and V12B input voltage level. The Under Voltage Protector (UVP) monitors V33, V5, V12A and V12B input voltage level. The Over Current Protector (OCP) monitor I33&V33, I5&V5, I12A&V12A and I12B&V12B input current sense. The pin OTP provides the over temperature protection function. When OVP or UVP or OCP or OTP 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 3.5 ms delay time for PSONB turn off FPOB.When OVP and UVP and OCP detect the right voltage level, the power good output (PGO) will be issue.

特性 Features

•  Two Channels for I12A&V12A and I12B&V12B OCP with auto calibration
• The OTP provides the over temperature protection.
• Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
• 75 ms delay time for UVP / OCP
• 300 ms delay time for PGO.
• 38 ms for PSONB input signal De–bounce.
• 73 us for OVP internal signal De–bounce.
• 73 us for UVP internal signal De–bounce.
• 20 ms for OCP internal signal De–bounce.
• 73 us for PGI internal signal De–bounce.
• 3.5 ms for PSONB turn-off FPOB.
• Short-circuit turn-on protection
- 75 ms delay to enable UV/OC detection, when PGI>1.2V, both at power on mode and normal mode
- 300ms delay to enable UV/OC detection, when PGI<1.2V, at power on mode.
- Disable UV/OC detection, when PGI<1.2V, at normal mode