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| Weltrend Semiconductor, Inc. WT7515 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. 73 us for internal signal De-glitches. 2.4 ms time delay for PSONB turn-off FPOB. PIN ASSIGNMENT AND PACKAGE TYPE Pin assignment WT7515-140WT PGI GND FPOB PSONB IS12 RI NC WT7515-141WT PGO VCC V5 V33 V12 IS33 IS5 PGI GND FPOB PSONB IS12 RI IS5 WT7515-142WT PGO VCC V5 V33 VCC2 V12 IS33 PGI GND FPOB PSONB IS12 RI VCC2 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1 2 3 4 5 6 7 14 13 12 11 10 9 8 PGO VCC V5 V33 V12 IS33 IS5 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 Package type 14-Pin Plastic DIP 14-Pin Plastic SO 14-Pin Plastic DIP 14-Pin Plastic SO 14-Pin Plastic DIP 14-Pin Plastic SO ORDERING INFORMATION WT7515-N140WT WT7515-S140WT WT7515-N141WT WT7515-S141WT WT7515-N142WT WT7515-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 |
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