www.fairchildsemi.comFAN7527BPower Factor Correction ControllerFeatures•Internal start-up timer•Internal R/C filter eliminates the need for an externalR/C filter•Very precise adjustable output over voltage protection•Zero current detector•One quadrant multiplier•Trimmed 1.5% internal band gap reference•Under voltage lockout with 3V of hysteresis•Totem pole output with high state clamp•Low start-up and operating current•8-Pin DIP or 8-Pin SOPDescriptionThe FAN7527B provides simple and high performanceactive power factor correction. The FAN7527B is optimizedfor electronic ballasts and low power and high density power supplies which require minimum board size, reduced external components and low power dissipation. Because theR/C filter is included in the current sense block, the externalR/C filter is not necessary. Special circuitry has also beenadded to prevent no load runaway conditions. Regardless ofthe supply voltage, the output drive clamping circuit limitsthe overshoot of the power MOSFET gate drive. It greatlyenhances the system reliability.8-DIPApplications•Electronic ballast•SMPS18-SOP1Rev 1.0.2©2003 Fairchild Semiconductor CorporationFAN7527BInternal Block DiagramVcc82.5V RefVcc+−11.5V8.5VUVLOInternalBiasDriveOutputTimer R7OUTIdet57.2V2V1.5V+−Zero CurrentDetectorSQStatic OVP40kCS48pF+−RCurrent SenseComparator+−2.25VVrefVeao(L)=2.25V1.8VVmoMULT3Vm10 ~ 3.8VMultiplierVmoK=Vm1⋅(Vm2−Vref)−0.25V+Vm2Vref~Vref+2.5VIsovp=30uAIdovp=40uAOVPCurrentDetector+−VrefVea(-)1INVError Amp6GND2EA_OUT2FAN7527BPIN DescriptionINVEA_OUTMULTCS1234(Top View)8765VccOUTGNDldetPin Number12345678Pin NameINVEA_OUTMULTCSldetGNDOUTVccPin Function DescriptionInverting input of the error amplifier. the output of the boost converter should be resistively divided to 2.5V and connected to this pin.The output of the error amplifier. a feedback compensation network is placed between this pin and the INV pin.Input to the multiplier stage. the full-wave rectified ac voltage is divided to less than 2V and is connected to this pin.Input of the PWM comparator. the MOSFET current is sensed by a resistor and the resulting voltage is applied to this pin. an internal R/C filter is included to reject any high frequency noise.Zero current detection input. The ground potential of all the pins.Gate driver output. the push pull output stage is able to drive the power MOSFET with peak current of 500mA.Supply voltage of driver and control circuits.3FAN7527BAbsolute Maximum Ratings (Ta=25°C)CharacteristicsSupply voltagePeak drive output currentDriver output clamping diodes Vo > Vcc or Vo < -0.3VDetector clamping diodesError amp, multiplier and comparator input voltagesOperating junction temperatureOperating temperature rangeStorage temperature rangePower dissipation8-DIP8-SOPSymbolVCCIOH,IOLlclampldetVinTjToprTstgPdValue30±500±10±10-0.3 to 6150-25 to 125-65 to 1501.10.8UnitVmAmAmAV°C°C°CWThermal DataCharacteristicsThermal resistance junction-ambient Max.8-DIP8-SOPSymbolRθjaValue110150Unit°C/WTemperature Characteristics (-25°C ≤ Ta ≤ 125°C)CharacteristicsTemperature stability for reference voltage (Vref)Temperature stability for multiplier gain (K)Symbol∆Vref∆K/∆TMin.--Typ.20-0.2Max.--UnitmV%/°C4FAN7527BElectrical CharacteristicsVCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.CharacteristicsStart threshold voltageUVLO hysteresis< SUPPLY CURRENT SECTION >Start-up supply currentOperating supply currentOperating current at OVPDynamic operating supply current< ERROR AMPLIFIER SECTION >Voltage feedback input thresholdLine regulationTemperature stability of Vref (Note1)Input bias currentOutput source currentOutput sink currentOutput upper clamp voltage (Note2)Output lower clamp voltage (Note3)Large signal open loop gain (Note4)Power supply rejection ratio (Note5)Unity gain bandwidth (Note6)Slew rate (Note7)< MULTIPLIER SECTION>Input bias current (pin3)M1 input voltage range (pin3)M2 input voltage range (pin2)Multiplier gain (Note8)Maximum multiplier output voltageTemperature stability of K (Note9)Ib(m)∆Vm1∆Vm2K∆K/∆T---Vm1 = 1V, Vm2 = 3.5V-25 ≤ Ta ≤ 125°C-0.50Vref0.361.65----0.441.8-0.20.53.8Vref+2.50.521.95-uAVV1/VV%/°CVref∆Vref1∆Vref3Ib(ea)IsourceIsinkVeao(H)Veao(L)GvPSRRGBWSRVm2 = 4VVm2 = 4VIsource = 0.1mAIsink = 0.1mA-14V ≤ Vcc ≤ 25V--Iref = 0mA, Ta = 25°C-25 ≤ Ta ≤ 125°C14V ≤ Vcc ≤ 25V-25 ≤ Ta ≤ 125°C-2.4652.44---0.5-22--6060--2.52.50.120--4462.25808010.62.5352.5610-0.5--------VVmVmVuAmAmAVVdBdBMHzV/usIstIccIcc(ovp)IdccVcc = Vth(st) -0.2VOutput not switchingVinv = 3V50kHz, CI = 1nF10---6031.741008uAmAmAmASymbolVth(st)HY(st)Test ConditionVcc Increasing-Min.10.52Typ.11.53Max.12.UnitVV< UNDER VOLTAGE LOCKOUT SECTION>Vomax(m)Vinv =0V, Vm1 = 4V5FAN7527BElectrical Characteristics (Continued)VCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.Characteristics< CURRENT SENSE SECTION>Input offset voltage (Note8)Input bias currentCurrent sense delay to output (Note11)< ZERO CURRENT DETECT SECTION >Input voltage thresholdDetect hysteresisInput low clamp voltageInput high clamp voltageInput bias current< OUTPUT SECTION >Output voltage highOutput voltage lowRising time (Note13)Falling time (Note14)Maximum output voltageOutput voltage with UVLO activated< RESTART TIMER SECTION>Restart time delay
Soft OVP detecting currentDynamic OVP detecting currentStatic OVP threshold voltageIsovpIdovpVovpVinv = 2.7V--25352.130402.25352.4uAuAVtd(rst)Vm1 = 1V, Vm2 = 3.5V-150-usVohVoItrtfVomax(o)Vomin(o)Io = -10mAIo = 10mACI = 1nFCI = 1nFVcc = 20V, Io = 100uAVcc = 5V , Io = 100uA10.5---12-110.81305014--1200120161VVnsnsVVVth(det)HY(det)Vclamp(I)Ib(det)Vclamp(h)Idet = 3mA1V ≤ Vdet ≤ 5V-Vdet increasing-Idet = -100uA1.70.20.456.5-1-20.50.757.2-0.1-2.30.817.91±3VVVVuAmAVio(cs)Ib(cs)td(cs)Vm1=0V , Vm2 = 2.2V0V ≤ Vcs ≤ 1.7V--10-1-3-0.1200101500mVuAnsSymbolTest ConditionMin.Typ.Max.UnitInput high/low clamp diode current (Note12)Iclamp(d)Note 1 ~ 14: These parameters, although guaranteed, are not 100% tested in production.Pin4_ThresholdMultiplier Gain: K=------------------------------------------------------......(Vm1=Vpin3,Vm2=Vpin2)Vm1×(Vm2–Vref)6FAN7527BTypical Performance CharacteristicsFig.1 E.A. Output Voltage vs. C.S. Threshold2.0Vm1=3.0VVm1=2.5VVm1=2.0VVm1=3.5VFig.2 Multiplier Input Voltage vs. C.S. Threshold2.01.8Veao=4.25VVeao=4.0VVeao=3.75VVeao=4.5VCS ST hesshholdollttaag(VC.Trhreold VVogee(V))Vm1=4.0VVm1=1.0V1.0C.S. Threshold Voltage(V)1.5Vm1=1.5VCS Threshold Voltage(V)1.61.41.21.00.80.60.40.2Veao=3.5VVeao=3.25VVeao=3.0VVm1=0.5V0.5Veao=2.75VVeao=2.5VVm1=0V0.02.02.53.03..04.55.00.0012345EA Output Voltage(V)Multiplier Input Voltage(V)Figure 1. Error Amplifier Output Voltage vs Current Sensing ThresholdFig.3 Supply Current vs. Supply Voltage0.015Figure 2. Multiplier Input Voltage vs Current Sensing ThresholdFig.4 Reference Voltage vs. Temperature2.70.0122.60.009Reference Voltage(V)Supply Current(A)2.50.0062.40.0030.000010203040502.3-250255075100125Supply Voltage(V)Temperature (℃)Figure 3. Supply Current vs Supply VoltageFigure 4. Reference Voltage vs TemperatureFig.5 Start-up Threshold vs. Temperature141210820-250255075100125Fig.6 UV Lockout Hysteresis vs. TemperatureUV Lockout Hyteresis(V)Startup Threshold(V)3210-250255075100125Temperature (℃)Temperature (℃)Figure 5. Start-Up Threshold vs TemperatureFigure 6. UV Lockout Hysteresis vs Temperature7FAN7527BTypical Performance Characteristics (Continued)Fig.7 Start-up Supply Current vs. Temperature10090Fig.8 E.A. Source CurrenT vs. Temperature0Start-up Supply Current(uA)80706050403020100-250255075100125-1EA Source Current(mA)-2-3-4-5-250255075100125Temperature (℃)Temperature (℃)Figure 7. Start-Up Supply Current vs TemperatureFigure 8. Error Amplifier Source Current vsTemperatureFig.10 E.A. Input Bias Current vs. Temperature0.50.4Fig.9 E.A. Sink Current vs. Temperature5EA Input Bias Current(uA)40.30.20.10.0-0.1-0.2-0.3-0.4EA Sink Current(mA)3210-250255075100125-0.5-250255075100125Temperature (℃)Temperature (℃)Figure 9. Error Amplifier Sink Current vs TemperatureFig.11 Multiplier Gain vs. Temperature1.0Figure 10. Error Amplifier Input Bias Current vs TemperatureFig.12 Idet Threshold Voltage vs. Temperature4.00.83.20.6Idet Threshold Voltage(V)-250255075100125Multiplier Gain(1/V)2.40.41.60.20.80.00.0-250255075100125Temperature (℃)Temperature (℃)Figure 11. Multiplier Gain vs TemperatureFigure 12. ldet Threshold Voltage vs Temperature8FAN7527BTypical Performance Characteristics (Continued)Fig.13 Idet Input Hysteresis vs. Temperature1.0 5004500.8Idet Input Hysteresis(mV)4003500.6Restart Time(us)3000.4200150100500.20.0-2502550751001250-250255075100125Temperature (℃)Temperature(℃)Figure 13. ldet Input Hysteresis vs Temperature Figure 14. Restart Time vs TemperatureFig.15 Max. Mult. Output Voltage vs. temperature2.0Fig.16 Supply Current vs. Temperature5Maximum Mult. Output Voltage(V)1.Supply Current(mA)1.230.820.410.0-2502550751001250-250255075100125Temperature (℃)Temperature (℃)Figure 15. Max.Mult.Output Voltage vs TemperatureFigure 16. Supply Current vs Temperature 2509FAN7527BMechanical DimensionsPackage Dimensions in millimeters8-DIP0.018 ±0.0041.524 ±0.100.060 ±0.0040.46 ±0.106.40 ±0.200.252 ±0.008(#1#.20 ±0.200.362 ±0.00.60MAX0.378#4#52.0.1007.620.3005.08MAX0.2003.40 ±0.200.134 ±0.0083.30 ±0.300.130 ±0.0120.33MIN0.0130.79)0.0310.25–0.050.010–0.0020~15°+0.004+0.1010FAN7527BMechanical Dimensions (Continued)Package Dimensions in millimeters 8-SOPSymbolAA1A2BCDEeHhLGPqaaabbbMin-0.101.250.350.194.803.805.790.250.500--Nom-0.151.450.370.204.903.901.27BSC5.99-0.700.36 BSC---Max1.750.251.500.510.255.004.006.200.500.9080.250.1011FAN7527BOrdering InformationProduct NumberFAN7527BNFAN7527BMPackage8-DIP8-SOPOperating Temperature-25 ~ +125oCDISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.www.fairchildsemi.com8/16/03 0.0m 001Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation2.A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
