WT7515 140WT 141WT 142WT N140WT S140WT N141WT S141WT N142WT S142WT

Weltrend Semiconductor, Inc. ` WT7515 GENERAL DESCRIPTION The WT7515 provides protection circuits, power good output (PGO), fault

Weltrend Semiconductor, Inc. ` WT7515 WT7515 GENERAL DESCRIPTION The WT7515 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 Debounce. 73 us for internal signal Deglitches. 2.4 ms time delay for PSONB turn-off FPOB. PIN ASSIGNMENT AND PACKAGE TYPE Pin assignment WT7515 WT7515140WT 140WT PGI 1 14 WT7515 WT7515141WT 141WT PGO PGI 1 14 PGO 13 VCC GND 2 13 VCC 3 12 V5 FPOB 3 12 V5 PSONB 4 11 V33 PSONB 4 11 V33 V12 IS12 5 10 VCC2 IS12 5 10 V12 9 IS33 RI 6 9 V12 RI 6 9 IS33 8 IS5 IS5 7 8 IS33 VCC2 7 8 IS5 1 PGO PGI 13 VCC GND 2 3 12 V5 FPOB PSONB 4 11 V33 IS12 5 10 RI 6 NC 7 GND 2 FPOB 14 WT7515 WT7515142WT 142WT 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:support@weltrend.com.tw WT7515 WT7515 Package type ORDERING INFORMATION 14Pin Plastic DIP 14Pin Plastic SO 14Pin Plastic DIP 14Pin Plastic SO 14Pin Plastic DIP 14Pin Plastic SO WT7515 WT7515N140WT N140WT WT7515 WT7515S140WT S140WT WT7515 WT7515N141WT N141WT WT7515 WT7515S141WT S141WT WT7515 WT7515N142WT N142WT WT7515 WT7515S142WT S142WT PIN DESCRIPTION Pin Name TYPE PGI I GND P FPOB O PSONB I IS12 I RI I VCC2 I IS5 I IS33 I V12 I V33 I V5 I VCC I PGO O Description Power good input signal pin Ground Fault protection output pin, open drain output On/Off switch input 12V over current protection sense input Current sense adjust input Current sense power supply 5V over current protection sense input 3.3V over current protection sense input 12V over/under voltage input pin 3.3V over/under voltage input pin 5V over/under voltage input pin Power supply Power good output signal pin, open drain output Weltrend Semiconductor, Inc. Page 2