WT7512

 Weltrend Semiconductor, Inc. ` WT7512 PC POWER SUPPLY SUPERVISOR Data Sheet REV. 1.10 June 26, 2000 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] WT7512 Rev. 1.10 GENERAL DESCRIPTION The WT7512 provides protection circuits, power good output (PGO), fault protection latch (FPL_N), and a protection detector function (PDON_N) 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. When OVD or UVD detect the fault voltage level, the FPL_N is latched HIGH and PGO go low. The latch can be reset by PDON_N goo HIGH. There is 2.4mS delay time for PDON_N turn off FPL_N. When OVD and UVD detect the right voltage level, the power good output (PGO) will be issue. The WT7512 is similar to WT7510. It added under voltage detector of 12V and the short power–on protection. And the delay time 1.2mS is changed to 2.4mS. FEATURES The Over / Under Voltage Detector (OVD / UVD) monitors 3.3V, 5V, 12V input voltage level. Both of the power good output (PGO) and fault protection latch (FPL_N) are Open Drain Output. 75 / 300 ms time delay for UVD. 300 ms time delay for PGO. 38 ms for PDON_N input signa...