UNISONIC TECHNOLOGIES CO., LTD S3525 CMOS IC PC POWER SUPPLY SUPERVISOR DESCRIPTION The UTC S3525 is specially designed for switching power supply system. it provides protection circuits, power good output (PGO) indicator, fault protection output (FPOB) and a PSONB control. The protection circuits include over voltage protection (OVP), under voltage protection (UVP) and over current protection (OCP) monitoring for system voltages and currents. When 3.3V, 5V or 12V voltage is decreasing to 2.68V, 4.3V and 9.9V respectively, the under voltage protection (UVP) function will be enabled. FPOB will be set to high to turn off the PWM controller IC. Toggling the PSONB from low to high will reset the fault protection latch. The voltage difference across external current shunt is used for OCP functions. An external resistor can be used to adjust protection threshold. The power supply is turned on after 38mS delay time when PSONB signal is set from high to low. To turn off power supply, PSONB signal is set from low to high with the delay time 38mS. The PGI circuitry provides a power-down warning signal for PGO. When PGI input is lower than the internal 1.20V reference voltage, PGO signal is pulled low. FEATURES * OVP/UVP monitors 3.3V, 5V, 12V input voltage level. * OCP monitors IS33, IS5, IS12 input current sense. * Fault protection output (FPOB) with Open Drain Output stage. * Power good output (PGO) with Open Drain Output stage. * 38ms de-bounce time for PSONB input signal. * 300ms time delay from PGI to PGO. * 2.4ms time delay for PSONB to turn off FPOB. ORDERING INFORMATION Ordering Number Lead Free Plating Halogen Free S3525L-D14-T S3525G-D14-T S3525L-S14-R S3525G-S14-R S3525L-S14-T S3525G-S14-T www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd Package Packing DIP-14 SOP-14 SOP-14 Tube Tape Reel Tube 1 of 9 QW-R502-105.B S3525 CMOS IC PIN ASSIGNMENT FUNCTION DESCRIPTION PGI PSONB UV&OC Protection OV Protection PGI<1.2V L No No PGI<1.2V L No Yes PGI<1.2V L Yes No PGI<1.2V L Yes Yes PGI>1.2V L No No PGI>1.2V L No Yes PGI>1.2V L Yes No PGI>1.2V L Yes Yes X H X X Note: FPOB=L means: fault is not latched. FPOB=H means: fault is latched PGO=L means: fault. PGO=H means: No fault X=do not care FPOB L H L H L H H H H PGO L L L L H L L L L PIN DESCRIPTIONS PIN NO. PIN NAME TYPE 1 PGI Input 2 GND Supply 3 FPOB Output 4 PSONB Input 5 IS12AB Input 6 RI Input 7 8 9 10 11 12 13 V12B IS5 IS33 V12A V33 V5 VDD Input Input Input Input Input Input Supply 14 PGO Output DESCRIPTION Power Good Input. For ATX SMPS, it detects AC line voltage through the main transformer. Ground Fault Protection Output. Output signal to control the primary PWM IC through an opto-coupler. When FPOB is low, the PWM IC is enabled. Remote On/Off logic input from CPU or main-board. The power supply will be turned on/off after 38mS delay. 12V AB over current protection. Reference setting. One external resistor Ri connected between RI and GND pin will determine a reference current, IREF = 1.20/Ri, for OCP programming. 12V over/under voltage protection. 5V over current protection. 3.3V over current protection 12V over/under voltage protection. 3.3V over/under voltage protection 5V over/under voltage protection. Power supply. Power good logic output, 0 or 1(open-drain). Power good=1 means that the power supply is good for operation. The power good delay is 300mS. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R502-105.B S3525 CMOS IC BLOCK DIAGRAM V cc PGI Bandgap Reference VREF=1.2V + UN - 73 μs debounce clr PGO 225ms delay V12A IS33 + I REF*8 VS33 73 μs debounce + OV + UN V12A IS12AB Power On Reset + IREF*8 VS12A 2.4ms + UN V12A PWR Internal Power VCCI=3.6V 38 ms debounce delay + OV - FPOB RQ S Q PSONB 75ms/ 300ms delay + - VS12B + OV + UN V12A IS5 PWR OSC CLK + - V12A IREF*8 VS5 + OV + UN - UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw VREF=1.2V + RI 3 of 9 QW-R502-105.B S3525 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT -0.3 ~ 16 V V5,V33, PSONB, IS5, IS33 -0.3 ~ 7 V Input Voltage VIN IS12AB, V12B -0.3 ~ 16 V PGI -0.3 ~ VDD+0.3 V FPOB -0.3 ~ 7 V Output Voltage VOUT PGO -0.3 ~ 7 V Operating Temperature TOPR -40 ~ +125 °C Storage Temperature TSTG -55 ~ +150 °C 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. Supply Voltage, VDD, V12A RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL VDD Supply Voltage VDD Supply Voltage VCC2 Input Voltage Output Voltage Output Sink Current V5,V33 ,PGI ,PSONB V12A, V12B FPOB PGO FPOB PGO TYP 12 12 VIN VOUT IO(SINK) RI Output Current Supply Voltage Rising Time (VDD) MIN 4 9.5 IO(RI) tR 10 1 MAX 15 15 7 15 7 7 30 10 65 UNIT V V V V V V mA mA uA ms ELECTRICAL CHARACTERISTICS (Ta=25°C and VDD=5V and V12A=12V) PARAMETER Over Voltage Detection Over Voltage Threshold SYMBOL V12A, V12B V5 V33 Low Level Output Voltage (FPOB) VOL Output Leakage Current (FPOB) PSONB High-Level Input Voltage Low-Level Input Voltage Input Pull-up Current PGI and PGO ILEAK Under Voltage Threshold Input Threshold Voltage (PGI) Low Level Output Voltage (PGO) Output Leakage Current (PGO) VIH VIL IIN MIN TYP MAX UNIT 13.2 5.7 3.7 13.8 6.1 3.9 14.4 6.5 4.1 0.3 0.7 5 ISINK=10mA ISINK=30mA V(FPOB)=5V 2 PSONB=0V V12A, V12B V5 V33 VI(THD) VOL ISINK=10mA ILEAK PGO=5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS 10 4.30 2.69 1.20 V uA 0.8 V V uA 10.5 4.47 2.83 1.24 0.4 5 V V V V V uA 120 9.5 4.1 2.55 1.16 V V V 4 of 9 QW-R502-105.B S3525 CMOS IC ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER SWITCHING CHARACTERISTICS PSONB ON(PSONB Low to FPOB Low) PSONB OFF(PSONB Hi to PGO Low) PGI to PGO Delay Time Timing PGO Low to FPOB high UVD/OCD Turn on Delay Time Noise Deglitch Time Noise Deglitch Time for Latch TOTAL DEVICE Low Voltage Supply Current SYMBOL T(PSONB ON) T(PSONB OFF) TPG TPSOFF TUVP1 TUVP2 tg1 tg2 VDD IDD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS VDD=5V VDD=5V VDD=5V VDD=5V FPOB=Low & PGI > 1.2V FPOB=Low & PGI < 1.2V MIN TYP MAX UNIT 32 32 200 2.0 65 260 63 63 38 38 300 2.4 75 300 75 75 62 62 490 4 122 488 120 120 ms ms ms ms ms ms μs μs 1 V mA 3.0 PSONB=5V 5 of 9 QW-R502-105.B S3525 CMOS IC APPLICATION INFORMATION UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R502-105.B S3525 CMOS IC APPLICATION INFORMATION UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 9 QW-R502-105.B S3525 CMOS IC TYPICAL TIMMING DIAGRAM 1) PGI (UNDER-VOLTAGE): 2) V33, V5, V12A, V12B (UNDER-VOLTAGE) or IS33, IS5, IS12AB (OVER-CURRENT): tUVP2 = 300ms PSONB t PSOFF tUVP2 + t g2 FPOB t(PSONB ON) t(PSONB ON) PGO t PG +t g1 t(PSONB OFF) PGI V33 /V5 /V12 IS33 /IS5 /IS12 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R502-105.B S3525 CMOS IC TYPICAL TIMMING DIAGRAM(Cont.) 3) V33, V5, V12A, V12B (OVER-VOLTAGE). 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 9 of 9 QW-R502-105.B