S3525

UNISONIC TECHNOLOGIES CO., LTD S3525 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. CMOS IC 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 Package DIP-14 SOP-14 SOP-14 Packing Tube Tape Reel Tube www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 9 QW-R502-105.B S3525 PIN ASSIGNMENT CMOS IC FUNCTION DESCRIPTION PGI PSONB UV&OC Protection OV Protection PGI1.2V 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN NAME PGI GND FPOB PSONB IS12AB RI V12B IS5 IS33 V12A V33 V5 VDD PGO TYPE Input Supply Output Input Input Input Input Input Input Input Input Input Supply 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 BLOCK DIAGRAM CMOS IC V cc + UN PGO PGI Bandgap Reference VREF=1.2V IS33 73 μs debounce clr 225ms delay V12A + I REF*8 VS33 + OV + UN V12A IS12AB + IREF*8 VS12A + OV + UN V12A + Power On Reset PWR 73 μs debounce RQ SQ FPOB Internal Power VCCI=3.6V PSONB 2.4ms delay 38 ms debounce 75ms/ 300ms delay VS12B + OV + UN V12A PWR OSC CLK IS5 + IREF*8 V12A VS5 + OV + UN - VREF=1.2V + RI UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R502-105.B S3525 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Supply Voltage, VDD, V12A CMOS IC 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. RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage VDD Supply Voltage VCC2 Input Voltage Output Voltage Output Sink Current RI Output Current Supply Voltage Rising Time (VDD) V5,V33 ,PGI ,PSONB V12A, V12B FPOB PGO FPOB PGO SYMBOL VDD VIN VOUT IO(SINK) IO(RI) tR 10 1 MIN 4 9.5 TYP 12 12 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 Low Level Output Voltage (FPOB) Output Leakage Current (FPOB) PSONB High-Level Input Voltage Low-Level Input Voltage Input Pull-up Current PGI and PGO Under Voltage Threshold Input Threshold Voltage (PGI) Low Level Output Voltage (PGO) Output Leakage Current (PGO) SYMBOL V12A, V12B V5 V33 VOL ILEAK VIH VIL IIN ISINK=10mA ISINK=30mA V(FPOB)=5V 2 0.8 PSONB=0V 9.5 4.1 2.55 1.16 120 10 4.30 2.69 1.20 10.5 4.47 2.83 1.24 0.4 5 TEST CONDITIONS MIN 13.2 5.7 3.7 TYP 13.8 6.1 3.9 MAX UNIT 14.4 6.5 4.1 0.3 0.7 5 V V V V uA V V uA V V V V V uA V12A, V12B V5 V33 VI(THD) VOL ISINK=10mA ILEAK PGO=5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 9 QW-R502-105.B S3525 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 TEST CONDITIONS MIN 32 32 200 2.0 65 260 63 63 TYP 38 38 300 2.4 75 300 75 75 3.0 PSONB=5V CMOS IC MAX UNIT 62 62 490 4 122 488 120 120 ms ms ms ms ms ms μs μs V mA VDD=5V VDD=5V VDD=5V VDD=5V FPOB=Low & PGI > 1.2V FPOB=Low & PGI < 1.2V 1 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 9 QW-R502-105.B S3525 APPLICATION INFORMATION CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R502-105.B S3525 APPLICATION INFORMATION CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 9 QW-R502-105.B S3525 TYPICAL TIMMING DIAGRAM 1) PGI (UNDER-VOLTAGE): CMOS IC 2) V33, V5, V12A, V12B (UNDER-VOLTAGE) or IS33, IS5, IS12AB (OVER-CURRENT): PSONB tUVP2 = 300ms FPOB tUVP2 + t g2 t PSOFF t(PSONB ON) PGO t(PSONB ON) 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 TYPICAL TIMMING DIAGRAM(Cont.) 3) V33, V5, V12A, V12B (OVER-VOLTAGE). 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 9 of 9 QW-R502-105.B