WT7515

Weltrend Semiconductor, Inc. ` WT7515 PC POWER SUPPLY SUPERVISOR Data Sheet REV. 1.50 May 07, 2004 The information in this document is subject to change without notice. ©Weltrend Semiconductor, Inc. All Rights Reserved. 24 2 2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected] WT7515 Rev. 1.50 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 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. ...