3521-D16-T

3521_05 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD

3521 CMOS IC

w w w . u n i s o n i c . c o m . t w 1 of 5 Copyright © 2005 Unisonic Technologies Co., Ltd QW-R502-034,B 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. „ 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. DIP-16 *Pb-free plating product number: 3521L „ ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing 3521-D16-T 3521L-D16-T DIP-16 Tube

3521 L-D16-T

(1)Packing Type (2)Package Type (3)Lead Plating (1) T: Tube (2) D16: DIP-16 (3) L: Lead Free Plating , Blank: Pb/Sn

UNISONIC TECHNOLOGIES CO., LTD 2 of 5 www.unisonic.com.tw Q W - R 5 0 2 - 0 3 4 , B „ PIN CONFIGURATION V33 V12 PT GND CT VADJ OPNEGIN OPOUT DET PG TPG REM VCCUTC 3521 „ PIN DESCRIPTION PIN NO. PIN NAME TYPE FUNCTIONS 1 V33 I OVP/UVP INPUT FOR 3.3V

2 V5 I OVP/UVP INPUT FOR 5V

3 V12 I OVP/UVP INPUT FOR 12V

4 PT I ADDITIONAL OVP PROTECTION

5 GND P GROUND

6 CT CAP FOR OSCIILATION FREQUENCY

7 C1 O OUTPUT 1

8 C2 O OUTPUT 2

9 REM I REMOTE ON/OFF PIN.

10 TPG POWER GOOD DELAY TIME SETTING

11 PG O POWER GOOD SIGNAL OUT.

12 DET I POWER GOOD SIGNAL DETECTION INPUT

13 V CC P SUPPLY VOLTAGE FOR IC

14 OPOUT O OP AMP OUTPUT

15 OPNEGIN I OP AMP NEGATIVE INPUT

16 V ADJ I VOLTAGE ADJUST PIN

UNISONIC TECHNOLOGIES CO., LTD 3 of 5 www.unisonic.com.tw Q W - R 5 0 2 - 0 3 4 , B „ BLOCK DIAGRAM (1) (2) (3) OV V12 UVP 36ms Delay 4.5 ms Delay CT VADJ OPOUT PG TPG V33 1.2 5V 0.625V (4) PT (9) REM (6) (16) (15) (1 4) OPNEGIN (10) (11) (7) (8) IN UV UV UV+ OV+ OV+ OV+ OVP 250 ms delay OUT CLR S R QN -DET 0.625 V (12) OSC CLR 2 . 45V Q C N DETCMP DEAD TIME CONTROLER PWM PWMCMPERROR AMP REMONF REMON QOUT 0. 4V CONTROL D Q Q

UNISONIC TECHNOLOGIES CO., LTD 4 of 5 www.unisonic.com.tw Q W - R 5 0 2 - 0 3 4 , B „ ABSOLUTE MAXIMUM RATINGS (VCC=5.5V, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 5.5 V Drain Output Voltage V CC1, VCC25 . 5 V Drain Output Current I CC1, ICC2 200 mA Power Dissipation P D 200 mW Operating Temperature T OPR -10 ~ +70 ℃ Storage Temperature T STG -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 SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DEAD TIME CONTROL SECTION ZERO DUTY CYCLE 3.0 3.3Input Threshold Voltage V I(THR) MAX. DUTY CYCLE 0.1 V ERROR AMP SECTION Opneg Bias Voltage OPNE G OPEN 2.38 2.45 2.52 V Close Loop Voltage Gain G VC 0.5V ~ 3.5V 65 dB Cross Over Point 0dB 320 KHz OUTPUT SECTION Output Saturation Voltage V DSSAT I D=200mA 1.1 1.3 V Drain Off-State Current I D(OFF) V CC=VD=VS=0V 2 10 µA Rising Time t R 100 200 ns Falling Time t F 50 200 ns PROTECTION SECTION V33 3.8 4.1 4.3 V5 5.8 6.2 6.6 V12 4.41 4.64 4.90Over Voltage Protection (OVP) PT 1.2 1.25 1.3 V V33 1.78 1.98 2.18 V5 2.70 3.00 3.30Under Voltage Protection (UVP) V12 2.11 2.37 2.63 V UVP Disable Voltage P T 0.55 0.62 0.68 V UVP Delay Time tDLY 100 250 500 ms REMOTE ON/OFF SECTION REM High Input Voltage V IH 2.0 V REM Low Input Voltage V IL 0.8 V REM Pull High Voltage V H(PULL) 2.0 5.25 V REM Delay Time tDLY 30 36 42 ms REM Off Delay Time tDLY (OFF) 3.5 4.5 5.5 ms POWER GOOD SECTION Detecting Input Voltage V I(DET) 0.55 0.62 0.68 V Output Saturation Voltage V O(SAT) I PG=10mA 0.2 0.4 V Charging Current For TPG I CHAR 30 µA PG Output Pull-up Resistor R O(PULL-UP)) 4 K Ω PG Output Load Resistor R O(LOAD) 0.5 1 2 K Ω PG Delay Time tDLY C=2.2µF 100 250 500 ms TOTAL DEVICE Standby Supply Current I CC 10 20 mA OSCILLATION SECTION Oscillation Frequency Fosc C T=2200P 50 60 KHz Frequency Change With TEMP. Fosc/T C T=2200P 2 %

UNISONIC TECHNOLOGIES CO., LTD 5 of 5 www.unisonic.com.tw Q W - R 5 0 2 - 0 3 4 , B 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.