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