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UNISONIC TECHNOLOGIES CO., LTD
3512 CMOS IC
w w w . u n i s o n i c . c o m . t w 1 of 9 Copyright © 2005 Unisonic Technologies Co., Ltd QW-R502-073,A PC POWER SUPPLY SUPERVISORS DESCRIPTION The UTC 3512 is specially designed for switching power supply system. It provides over-voltage protection, over-current protection, under-voltage protection, on/off control and power good signal generating. OVP/UVP (Over/Under-Voltage Protection) monitors 3.3V, 5V and double 12V to protect our power supply and PC, FPO goes to high when one of these supply voltages exceeds their normal operation voltage range. OCP (Over Current Protection) monitors IS33, IS5, IS12 input current. The voltage difference across external current shunt is used for OCP functions. An external resistor which is connected between the RI pin and the GND pin can be used to adjust protection threshold. To achieve better immunity for lighting surge glitch and to prevent accidental power shut down during dynamic loading condition, the de-bounc e time for UVP/OCP is 73us respectively. The deglitch time for OVP is 73uS for better noise immunity. The power supply is turned on after 38mS de-bounce time when PSON signal is set from high to low. To turn off power supply, PSON signal is set from low to high and the de-bounce time is 115mS. When PGI input voltage level is lower than the internal 1.15V reference voltage, after 73uS de-bounce time, the PGO signal is pulled low. FEATURES * Over/Under-voltage protection for 3.3V, 5V, and two 12V * Over-current protection for 3.3V, 5V, and two 12V * PGO and FPO pins with open drain output stage * 300mS power good delay from PGI to PGO * 75mS delay for 3.3V, 5V and 12V power turn on * 2.8mS delay for PSON control to FPO turn off * 38mS / 115mS PSON on/off de-bounce time * 73uS width noise deglitches * 73uS de-bounce time for UVP and OCP * Wide supply voltage range DIP-14 SOP-14 *Pb-free plating product number: 3512L ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing 3512-D14-T 3512L-D14-T DIP-14 Tube 3512-S14-R 3512L-S14-R SOP-14 Tape Reel 3512-S14-T 3512L-S14-T SOP-14 Tube
UNISONIC TECHNOLOGIES CO., LTD 2 of 9 www.unisonic.com.tw QW-R502-073,A ORDERING INFORMATION(Cont.) 3512L-D14-T (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) D14: DIP-14, S14: SOP-14 (3) L: Lead Free Plating , Blank: Pb/Sn
UNISONIC TECHNOLOGIES CO., LTD 3 of 9 www.unisonic.com.tw QW-R502-073,A PIN CONFIGURATION
14 PGO
V DD VS5 VS33 VS12 IS33 IS5 PGI GND FPO PSON IS12 RI VS12B PIN DESCRIPTION PIN NO PIN NAME TYPE DESCRIPTION 1 PGI input Power good input. 3 FPO output Fault protection output, open drain output stage. 4 PSON input Power on/off control signal sends from CPU or main-board. The power supply will be turned on/off after 38mS/115mS respectively. 8 I S5 input 5V over current protection. 9 I S33 input 3.3V over current protection.
5 I S12 input
12V over current protection. Regardi ng typical application, this pin is connected to the positiv e end of a current shunt through one resistor. When the voltage on IS12 is higher than that of VS12 by 5mV, OCP will be enabled. One current sink, 8 x I REF, is used to determine the voltage drop between the positive end of the current shunt and VS12. Adjusting the value of the external resistor can adjust the threshold for OCP accordingly. The operation for IS5 or IS33 is the same.
6 RI input
Current sense setting. An external resistor Ri is connected between RI pin and GND pin will adjust a reference current, IREF = 1.15/Ri, for OCP function. 12 V S5 input 5V over/unde r-voltage protection. 7 V S12B input Second 12V over/ under-voltage protection. 10 V S12 input 12V over/unde r-voltage protection. 11 V S33 input 3.3V over/unde r-voltage protection. 13 V DD power Supply voltage. 4V ~ 15V. 14 PGO output Power good logic output, open drain output stage. The power good delay is 300mS from PGI to PGO. 2 GND power Ground.
UNISONIC TECHNOLOGIES CO., LTD 4 of 9 www.unisonic.com.tw QW-R502-073,A BLOCK DIAGRAM OV+ UN+ OV+ UN+ OV+ UN+ OV+ UN+ VREF IS3 3 IS1 2 IS5 PGI VS1 2B VS12A VS5 VS33 PSON FPO PGO VREF=1.15VBandgap Reference IREF×8 V12A V12A V12A IREF×8 IREF×8 V12A PWR 38ms /115ms debounce RST Power On Reset Clr 2.4 ms delay Clr 75ms delay RST R SQ 73µs debounce RST clr 300ms delay PWR IREF=VREF/RI VREF=1.15 V RI UN 73µs debounce
UNISONIC TECHNOLOGIES CO., LTD 5 of 9 www.unisonic.com.tw QW-R502-073,A ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT DC Supply Voltage V DD -0.3 ~ 16 V Input Voltage PSON, V S33, VS5, PGI V IN -0.3 ~ 8 V FPO -0.3 ~ 16 Output Voltage PGO VOUT -0.3 ~ 8 V Power Dissipation P D 400 mW Operating Temperature T OPR -40 ~ +85 Ċ Storage Temperature T STG -55 ~ +150 Ċ Note 1. Absolute maximum ratings are those val ues beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. Stresses above those listed may cause permanent damage to the device. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN MAX UNIT DC Supply Voltage V DD 4 15 V Input Voltage PSON, VS33, VS5, IS33, IS5, PGI 7 Input Voltage VS12,VS12B, IS12 VIN 15 V FPO 15 Output Voltage PGO VOUT 7 V FPO 20 Output Sink Current PGO IO(SINK) 10 mA Supply Voltage Rising Time See Note t R 1 mS Output Current RI I RI 12.5 62.5 µA Note VDD rising and falling slew rate must be less than 14V/mS. ELECTRICAL CHARACTERISTICS (VDD=12V, TA=25Ċ) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT UNDER-VOLTAGE AND PGI, PGO Input Threshold Voltage PGI V PGI 1.1 1.15 1.2 V Under-voltage protect VS33 2.6 2.8 3.0 Under-voltage protect VS5 4.0 4.2 4.4 Under-voltage protect VS12, VS12B VUVp 9.4 9.9 10.4 V Low Level Output Voltage (PGO) V OL V DD = 12V ISINK =10mA 0.7 V Leakage Current (PGO) I LEAK PGO = 5V 5 µA Under-voltage Enable Delay Time 49 75 114 mS Timing PG Delay PGI to PGO t PG 200 300 450 mS Noise Deglitch Time PGI to PGO 150 250 350 µS Timing UVP to Protection (FPO) T UVP V S33,VS5, VS12,VS12B 73 µS OVER-VOLTAGE AND OVER-CURRENT PROTECTION Over-Voltage Protection V S33 3.7 3.9 4.1 Over-Voltage Protection V S5 5.7 6.1 6.5 Over-Voltage Protection V S12, VS12B VOVP 13.2 13.8 14.4 V Ratio of Current Sense Sink Current to Current Sense Setting Pin (RI) Source Current IREF RI = 30 ΚΩ, 0.1% Resistor 7.6 8 8.4 Current Source Reference Voltage V REF 1.1 1.15 1.2 V OCP Comparator Input Offset Voltage V I(OFF) -5 5 mV Low Level Output Voltage (FPO) V OL I SINK =20mA 0.7 V Leakage Current (FPO) I LEAK V (FPO) = 5V 5 µA Timing OVP to Protection T OVP 73 µS Timing OCP to Protection T OCP 73 µS
UNISONIC TECHNOLOGIES CO., LTD 6 of 9 www.unisonic.com.tw QW-R502-073,A ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT PSON CONTROL High-Level Input Voltage V IH 1.9 V Low-Level Input Voltage V IL 0.98 V Timing PGO Low to FPO High T PSOFF 1.6 2.8 4.0 mS ON 24 38 57 mS Timing PSON to On/Off OFF TPSON 24 38 57 mS Input Pull-up Current IPSON PSON = 0V 120 µA TOTAL DEVICE Supply Current I DD PSON = 5V, V DD = 5V 1.0 1.8 mA VDD Start Threshold Voltage V THD 4.0 V VDD Min. Operation Voltage After Start-up V MIN 3.65 V
UNISONIC TECHNOLOGIES CO., LTD 7 of 9 www.unisonic.com.tw QW-R502-073,A TYPICAL APPLICATION CIRCUIT 12V UTC 3512 PSON PGI 1 14PGI GND FPO PSON I S12 RI VS12B PGO VDD VS5 VS33 VS12 IS33 IS5 VSB 12V 3.3V Power Supply Output Side 12V 12V System Side
UNISONIC TECHNOLOGIES CO., LTD 8 of 9 www.unisonic.com.tw QW-R502-073,A TIMING DIAGRAM PSON On/Off and 3.3V, 5V,12V OVP Function VDD PSON FPO PGI PGO TPSON(ON) TOVP TPG TPSOFF 3.3V,5V,12V TPSON(OFF) 3.3V,5 V,12V OVP UVP and OCP Function VDD PSON FPO PGI PGO 12V TOVP TUVP TOCP OCP
UNISONIC TECHNOLOGIES CO., LTD 9 of 9 www.unisonic.com.tw QW-R502-073,A 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.