AIC1686 Off-Line Power Supply Protection IC with Shunt Regulator FEATURES Overvoltage Protection for 3.3V, 5V, and 12V Outputs. Power Good Signal for 5V Output. Remote ON/OFF Input. Uncommitted Protection Input. 5V Regulator with 25mA Source Current. 2.5V Precision Shunt Regulator. 8V to 16V Operation. Low Power Consumption. APPLICATIONS PC Off-Line Power Management. DESCRIPTION The AIC1686 is a supervisory and protection IC intended for use in off-line, multiple output power supplies. It consists of protection circuitry, power good indicator, remote ON/OFF control, and precision shunt regulator. The overvoltage protection (OVP) function is for 3.3V, 5V, and 12V outputs. In addition, an uncommitted fault detection input (PRIN) is available for use with other protection functions, such as overcurrent, undervoltage, and/or short-circuit protection of outputs. The shunt regulator has been included to implement the feedback control for one of the power supply’s outputs. The noniverting input (EAI) is internally tied to a precision 2.5V reference. The power good circuit monitors the 5V output and asserts, with a programmable delay, a TTL compatible high logic level at its output after the 5V output reaches the regulation range. The delay is programmed by a timing capacitor connected to CPG pin of the IC. The power good circuit sets its output low before the 5V output goes out of regulation range. The remote ON/OFF function enables the power supply to be turned on and off from the secondary side by a switch. Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC DS-1686-00 TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1686 ORDERING INFORMATION AIC1686 XX ORDER NUMBER PACKAGE TYPE N: PLASTIC DIP AIC1686CN (PLASTIC DIP) PIN CONFIGURATION TOP VIEW TEMPERATURE RANGE C: 0°C~70°C PRIN 1 16 CPG REMI 2 15 FL PG 3 14 REMO V33 4 13 REF GND 5 12 VCC V5 6 11 CLS V12 7 10 LS EAO 8 9 EAI TYPICAL APPLICATION CIRCUIT DC OUTPUTS AC/DC CONVERTER AC LINE SENSE PWM CONTROLLER OPTOISOLATOR OPTPISOLATOR POWER GOOD AIC1686 PROTECTION INPUT REGULATION REMOTE ON/OFF PROTECTION O/P ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC .......................……………………..………..….................-0.5V to 16V Pins: V12, V5, V33, LS, EAO ....................…….………….…………................. -0.5V to 16V Any Other Pins ...............…………........………….…................. GND - 0.5V to Ambient Temperature Range VCC+0.5V .......................………………………..…................. 0°C~70°C Thermal Information Thermal Resistance, θJA DIP Package ...................………..…................. 110°C/W Maximum Junction Temperature (Plastic Package) .....….......................………....... 125°C Maximum Storage Temperature Range .......................……........………....... -65°C~150°C Maximum Lead Temperature (Soldering 10 Sec) .......................……………............. 300°C Maximum Power Dissipation .......................………………………………................. 500mW (Derate at 10mW/°C above 70°C ambient) 2 AIC1686 TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ELECTRICAL CHARACTERISTICS (VCC= 12V, Ta=25°°C, unless otherwise specified.) PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT VCC Supply Current Nominal Mode ( Remote On) All Outputs Unloaded IVCC 0.5 1 mA Standby Mode ( Remote Off) All Outputs Unloaded IVCCSB 0.4 0.8 mA Reference Voltage IO=0 to 25mA, CL=1µF VREF 5 5.15 V Line Regulation VCC=8V to 16V, CL=1µF 15 mV 5V Reference (Note1) 4.85 Error Amplifier Internal Reference Voltage Maximum Output Sink Current VEAO=1V VEA 2.45 IEA 20 mA 80 dB Open Loop Voltage Gain Unity Gain Bandwidth CL=100pF Power Supply Rejection Ratio Slew Rate CL=100pF 2.5 2.55 V GBW 3 MHz PSRR 85 dB SR 2 V/µS Fault Detection Fault Output High Voltage IOH=500µA, Remote On VFLOH 4 V Fault Output High Voltage IOH=20µA, Remote Off VFLOHS 4 V Fault Output Low Voltage IOL=4.5mA VFLOL 3.3V Input OVP Trip Level Input Voltage Rising V33OVP 3.7 5V Input OVP Trip Level Input Voltage Rising V5OVP 12V Input OVP Trip Level Input Voltage Rising Protection Input Trip Level 0.4 V 4 4.3 V 5.5 6 6.5 V V12OVP 13.2 14 15.6 V Input Voltage Rising VPIH 3.8 Input Voltage Falling VPIL Fault Latch Delay TFL 10 Input Voltage Rising VRIH 3.8 Input Voltage Falling VRIL V 25 1.2 V 50 µS Remote ON/OFF REMI Input Threshold REMI Input Hysteresis HYSRI 0.7 V 1.2 V 1.8 V 3 AIC1686 ELECTRICAL CHARACTERISTICS (CONTINUED) PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT REMI=L RRIL 100 REMI=H RRIH 6 REMO Output Low Voltage IOL=4.5mA VROL REMO Output High Voltage IOH=500µA VROH 4 7.8 REMI Pull High Resistor KΩ 0.4 V V Power Good LS Input Clamp Voltage ILS=1mA VLSCMP LS Input Rising Threshold CLS=5V VLSH LS Input Hysteresis Voltage CPG Timing Current V5=5V CPG Input Hysteresis 9.8 6.2 V V HYSLS 1 1.2 1.6 V ICPGH 6 9 12 µA HYSCPG 0.4 V 6.7 mS CPG Recharge Delay Time LS (L to H) TRCPG PG Output High Voltage IOH=5mA VPGOH PG Output Low Voltage IOL=12mA VPGOL Delay LS Falling to PG Falling CPG=1µF TPGF Delay LS Rising to PG Rising CPG=1µF TPGR Delay REMI Rising to PG Falling 8.8 TRIPGF 4 V 0.4 µS 52 150 300 V 450 1 mS µS Note1: A 1µF capacitor is connected between REF and GND to ensure a stable reference voltage. 4 AIC1686 5V Reference Voltage vs. Temperature 5.05 5 4.95 4.9 -10 0 10 20 30 40 50 60 70 80 90 100 Inverting Input Voltage Change (mV) Temperature (°C) Inverting Input Voltage Change with Output Sink Current of Error Amplifier 50 30 EAO=1V EAO=2.5V 10 0 0.01 0.1 1 Inverting Reference Voltage of Error Amplifier vs. Temperature 2.52 2.51 2.5 2.49 2.48 2.47 -10 0 10 20 30 40 50 60 70 Temperature (°C) 80 90 100 CPG Timing Current vs. V5 voltage 40 20 2.53 12 CPG Timing current (µA) 5V Reference Voltage (V) 5.1 Internal Reference Voltage of Error amplifier (V) TYPICAL PERFORMANCE CHARACTERISTICS 0°C 10 25°C 8 100°C 6 4 10 4.5 Output Sink Current (mA) 4.7 4.9 5.3 5.1 5.5 V5 Input Voltage (V) Delay CPG Rising to PG Ringing Standby mode Vcc Supply Current vs. Temperature 0.43 0.41 450 CPG =1µF 0.39 TPGR (mS) Vcc Supply Current (mA) 0.37 0.35 350 0.33 0.31 0.29 -10 0 10 20 30 40 50 60 Temperature (°C) 70 80 90 100 250 6 8 10 12 CPG Timing Current (µA) 5 AIC1686 BLOCK DIAGRAM VCC REF EAI EAO GND REG. - 2.5V + V33 V5 V12 OVP Dwtector REF S 25µS Delay R Q REF Power ON Reset PRIN 60K FL REMI V5 REF V5 PG 9µA + - REMO LS + 2.5V CPG V5 9V CLS 10K 100K 6 AIC1686 PIN DESCRIPTIONS IN 1: PRIN Use rectified output from main - Auxiliary protection logic input to power fault latch. HIGH for 25µS to set Internally clamped to 9V and sinks up to latch and cause FL output to go LOW. Internally active transformer. 2mA. pulled down for normal operation. PIN 2: REMI - Logic input for remote ON/OFF control power supply. PIN 11: CLS - Timing capacitor used to help ensure that a falling LS voltage is LOW= detected before power supply REMOTE ON, HIGH=REMOTE outputs fall out of regulation. OFF. In remote off state this chip mode, PIN 12: VCC- VCC supply input to IC. This FL=HIGH, REMO = LOW, and should be a DC voltage between PG = LOW. 8 and 16V. goes PIN 3: PG into standby - Power good output signal. High PIN 13: REF - +5V precision reference output. level indicates that power is May be used to supply up to good. 25mA to external circuitry. PIN 4: V33 - From 3.3V power supply. Used PIN 14: REMO- Remote ON/OFF output that indicates the state of the power for overvoltage sensing only. supply. HIGH = REMOTE ON, PIN 5: GND - Ground pin. Connect to ground LOW=REMOTE OFF. This is on secondary side. PIN 6: V5 essentially the inverse of the - From 5V power supply. Used for overvoltage sensing as well as internal supply for certain specific REMI input voltage. PIN 15: FL - Fault output that indicates the fault condition. HIGH = NORMAL, functions. PIN 7: V12 LOW = FAULT. When fault states - From 12V power supply. Used for overvoltage sensing only. PIN 16: CPG PIN 8: EAO - Output of the error amplifier. Can be used to drive an opto-isolator. PIN 9: EAI - Inverting input of the the PG goes LOW. error amplifier, used to close voltage -Timing capacitor that sets the delay from +5V main coming up to PG signal being asserted High. TPGR ≈ 2 . 5 × CCPG ICPGH feedback loop. PIN 10: LS - AC line sense input signal. 7 AIC1686 PACKAGE DIMEMSION 16 LEAD PLASTIC DIP (unit: mm) D E1 E A2 A1 C L eB b e SYMBOL MIN MAX A1 0.381 — A2 2.92 4.96 b 0.35 0.56 C 0.20 0.36 D 18.66 19.69 E 7.62 8.26 E1 6.09 7.12 e 2.54(TYP) eB — 10.92 L 2.92 3.81 8