UNISONIC TECHNOLOGIES CO., LTD 3521 CMOS IC PWM CONTROLLER WITH SUPERVISORY CIRCUIT FOR SWITCHING POWER SUPPLY DESCRIPTION UTC 3521 PWM controller is designed for switching mode power supply for PCs etc. It provides all the functions similar to combinations of industrial 494 plus UTC 3510 circuits. DIP-16 FEATURES * Over-voltage protection for 3.3V, 5V and 12V with delay * Under-voltage detection for 3.3V, 5V and 12V with delay * Remote ON/OFF function * Power good circuitry for PCs. *Pb-free plating product number: 3521L ORDERING INFORMATION Normal 3521-D16-T Order Number Lead Free Plating 3521L-D16-T 3521L-D16-T Package Packing DIP-16 Tube (1)Packing Type (1) T: Tube (2)Package Type (2) D16: DIP-16 (3)Lead Plating (3) L: Lead Free Plating, Blank: Pb/Sn www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-034,B 3521 CMOS IC PIN CONFIGURATION V33 V5 V12 PT GND CT C1 C2 1 2 3 4 5 6 7 8 16 UTC 3521 15 14 13 12 11 10 9 VADJ OPNEGIN OPOUT VCC DET PG TPG 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 FOR OSCIILATION FREQUENCY OUTPUT 1 OUTPUT 2 REMOTE ON/OFF PIN. POWER GOOD DELAY TIME SETTING POWER GOOD SIGNAL OUT. POWER GOOD SIGNAL DETECTION INPUT SUPPLY VOLTAGE FOR IC OP AMP OUTPUT OP AMP NEGATIVE INPUT VOLTAGE ADJUST PIN UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-034,B 3521 CMOS IC BLOCK DIAGRAM (1) V33 +UV (2) V5 +UV (3) V12 +UV UVP 250ms delay IN +OV OUT CLR S OVP Q QN R +OV +OV 1.25V (4) PT 0.625V 36ms Delay (9) REM OV + + QOUT REMONF 4.5 ms REMON Delay (12) DET 0. 625V OSC CLR (6) CT (16) VADJ (15) OPNEGIN 4k + ERROR AMP + 2.45V (14) OPOUT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw PWM CONTROL PWMCMP + 0.4V + - D Q C QN TPG (10) PG (11) C1 (7) C2 (8) DETCMP DEAD TIME CONTROLER 3 of 5 QW-R502-034,B 3521 CMOS IC ABSOLUTE MAXIMUM RATINGS (VCC=5.5V, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 5.5 V Drain Output Voltage VCC1, VCC2 5.5 V Drain Output Current ICC1, ICC2 200 mA Power Dissipation PD 200 mW Operating Temperature TOPR -10 ~ +70 ℃ Storage Temperature TSTG -65 ~ +150 ℃ Note Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (Ta=25℃, VCC =5V, unless otherwise specified) PARAMETER DEAD TIME CONTROL SECTION Input Threshold Voltage ERROR AMP SECTION Opneg Bias Voltage Close Loop Voltage Gain Cross Over Point OUTPUT SECTION Output Saturation Voltage Drain Off-State Current Rising Time Falling Time PROTECTION SECTION Over Voltage Protection (OVP) Under Voltage Protection (UVP) UVP Disable Voltage UVP Delay Time REMOTE ON/OFF SECTION REM High Input Voltage REM Low Input Voltage REM Pull High Voltage REM Delay Time REM Off Delay Time POWER GOOD SECTION Detecting Input Voltage Output Saturation Voltage Charging Current For TPG PG Output Pull-up Resistor PG Output Load Resistor PG Delay Time TOTAL DEVICE Standby Supply Current OSCILLATION SECTION Oscillation Frequency Frequency Change With TEMP. SYMBOL VI(THR) GVC VDSSAT ID(OFF) tR tF TEST CONDITIONS ZERO DUTY CYCLE MAX. DUTY CYCLE OPNEG OPEN 0.5V ~ 3.5V 0dB 2.38 ID=200mA VCC=VD=VS=0V V33 V5 V12 PT V33 V5 V12 PT tDLY 3.8 5.8 4.41 1.2 1.78 2.70 2.11 0.55 100 VIH VIL 2.0 VH(PULL) tDLY tDLY (OFF) 2.0 30 3.5 VI(DET) VO(SAT) ICHAR 0.55 IPG=10mA RO(PULL-UP)) RO(LOAD) tDLY C=2.2µF 0.5 100 ICC Fosc Fosc/T CT=2200P CT=2200P UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 3.0 0.1 3.3 2.45 65 320 2.52 V dB KHz 1.1 2 100 50 1.3 10 200 200 V µA ns ns 4.1 6.2 4.64 1.25 1.98 3.00 2.37 0.62 250 4.3 6.6 4.90 1.3 2.18 3.30 2.63 0.68 500 V ms 36 4.5 0.8 5.25 42 5.5 V V V ms ms V V V 0.62 0.2 30 4 1 250 0.68 0.4 2 500 V V µA KΩ KΩ ms 10 20 mA 60 KHz % 50 2 4 of 5 QW-R502-034,B 3521 CMOS IC UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R502-034,B