3521

UNISONIC TECHNOLOGIES CO., LTD 3521 PWM CONTROLLER WITH SUPERVISORY CIRCUIT FOR SWITCHING POWER SUPPLY CMOS IC „ DESCRIPTION UTC 3521 PWM controller is designed for switching mode power supply for PCs. It provides all the functions necessary to monitor and control the output of the power supply. Remote ON/OFF control, power good circuitry, some protection features against over-voltage and over-power are implements. „ FEATURES * Over-Voltage Protection for 3.3V, 5V and 12V * Under-Voltage Detection for 3.3V, 5V and 12V * Over-Power Protection * Remote ON/OFF Function * Power Good Circuitry * Delay Time for PG Signal * Delay Time for Over-Voltage and Under-Voltage Protection * On-Chip Oscillator and Error Amplifier DIP-16 „ ORDERING INFORMATION Ordering Number Lead Free Plating Halogen Free 3521L-D16-T 3521G-D16-T Package DIP-16 Packing Tube 3521L-D16-T (1)Packing Type (2)Package Type (3)Lead Free (1) T: Tube (2) D16: DIP-16 (3) L: Lead Free, G: Halogen Free www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 6 QW-R502-034.D 3521 „ PIN CONFIGURATION V33 V5 V12 PT GND CT C1 C2 1 2 3 4 5 6 7 8 16 VADJ 15 OPNEGIN 14 OPOUT 13 VCC 12 DET 11 PG 10 TPG 9 REM „ PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME V33 V5 V12 PT GND CT C1 C2 REM TPG PG DET VCC OPOUT OPNEGIN VADJ TYPE I I I I P O O I O I P O I I FUNCTIONS OVP/UVP Input For 3.3V OVP/UVP Input For 5V OVP/UVP Input For 12V Additional OVP Protection Ground Cap F...