FAN7527中文资料

©2002FairchildSemiconductorCorporation•InternalStart-upTimer•InternalR/CFilterEliminatestheNeedforanExternalR/CFilter•VeryPreciseAdjustableOutputOverVoltageProtection•ZeroCurrentDetector•OneQuadrantMultiplier•Trimmed1.5%InternalBandGapReference•UnderVoltageLockoutwith3VofHysteresis•TotemPoleOutputWithHighStateClamp•LowStart-upandOperatingCurrent•8-PinDIPor8-PinSOPApplications•ElectronicBallast•SMPSDescriptionTheFAN7527Bprovidessimpleandhighperformanceactivepowerfactorcorrection.TheFAN7527Bisoptimizedforelectronicballastsandlowpowerandhighdensitypowersupplieswhichrequireminimumboardsize,reducedexternalcomponentsandlowpowerdissipation.BecausetheR/Cfilterisincludedinthecurrentsenseblock,theexternalR/Cfilterisnotnecessary.Specialcircuitryhasalsobeenaddedtopreventnoloadrunawayconditions.Regardlessofthesupplyvoltage,theoutputdriveclampingcircuitlimitstheovershootofthepowerMOSFETgatedrive.Itgreatlyenhancesthesystemreliability.FAN7527BPowerFactorCorrectionController8-DIP8-SOP11FAN7527B2InternalBlockDiagramINV12Vea(-)ErrorAmpVref++++−−−−OVPCurrentDetectorIsovp=30uAIdovp=40uA++++−−−−VrefVm2Vref~Vref+2.5V2.25VStaticOVP++++−−−−EA_OUT6GND)(Vref2Vm1VmVmoK−−−−⋅⋅⋅⋅====Multiplier++++−−−−Vm1Vmo0~3.8V8pF40k++++−−−−++++−−−−2.5VRefInternalBiasTimerR7Vcc5438VccIdetCSMULTOUTDriveOutput0.25VVeao(L)=2.25VRQSUVLO7.2VZeroCurrentDetectorCurrentSenseComparator1.8V2V1.5V11.5V8.5VFAN7527B3PINDescriptionPinNumberPinNamePinFunctionDescription1INVInvertinginputoftheerroramplifier.Theoutputoftheboostconvertershouldberesistivelydividedto2.5Vandconnectedtothispin.2EA_OUTTheoutputoftheerroramplifier.AfeedbackcompensationnetworkisplacedbetweenthispinandtheINVpin.3MULTInputtothemultiplierstage.Thefull-waverectifiedACvoltageisdividedtolessthan2Vandisconnectedtothispin.4CSInputofthePWMcomparator.TheMOSFETcurrentissensedbyaresistorandtheresultingvoltageisappliedtothispin.AninternalR/Cfilterisincludedtorejectanyhighfrequencynoise.5ldetZerocurrentdetectioninput.6GNDThegroundpotentialofallthepins.7OUTGatedriveroutput.ThepushpulloutputstageisabletodrivethePowerMOSFETwithpeakcurrentof500mA.8VccSupplyvoltageofdriverandcontrolcircuits.12348765VccOUTMULTCSGNDldetEA_OUTINV(TopView)FAN7527B4AbsoluteMaximumRatings(Ta=25°°°°C)TemperatureCharacteristics(-25°°°°C≤≤≤≤Ta≤≤≤≤125°°°°C)CharacteristicsSymbolValueUnitSupplyVoltageVCC30VPeakDriveOutputCurrentIOH,IOL±500mADriverOutputClampingDiodesVoVccorVo-0.3Vlclamp±10mADetectorClampingDiodesldet±10mAErrorAmp,MultiplierandComparatorInputVoltagesVin-0.3to6VOperatingJunctionTemperatureTj150°COperatingTemperatureRangeTopr-25to125°CStorageTemperatureRangeTstg-65to150°CPowerDissipationPd0.8WCharacteristicsSymbolMin.Typ.Max.UnitTemperatureStabilityforReferenceVoltage(Vref)∆Vref-20-mVTemperatureStabilityforMultiplierGain(K)∆K/∆T--0.2-%/°CFAN7527B5ElectricalCharacteristicsVCC=14V,-25°C≤Ta≤125°C,unlessotherwisestated.CharacteristicsSymbolTestConditionMin.Typ.Max.UnitUNDERVOLTAGELOCKOUTSECTIONStartThresholdVoltageVth(st)VccIncreasing10.511.512.5VUVLOHysteresisHY(st)-234VSUPPLYCURRENTSECTIONStart-upSupplyCurrentIstVcc=Vth(st)-0.2V1060100uAOperatingSupplyCurrentIccOutputnotswitching-36mAOperatingCurrentatOVPIcc(ovp)Vinv=3V-1.74mADynamicOperatingSupplyCurrentIdcc50kHz,CI=1nF-48mAERRORAMPLIFIERSECTIONVoltageFeedbackInputThresholdVrefIref=0mA,Ta=25°C2.4652.52.535V-25≤Ta≤125°C2.442.52.56VLineRegulation∆Vref114V≤Vcc≤25V-0.110mVTemperatureStabilityofVref(Note1)∆Vref3-25≤Ta≤125°C-20-mVInputBiasCurrentIb(ea)--0.5-0.5uAOutputSourceCurrentIsourceVm2=4V-2-4-mAOutputSinkCurrentIsinkVm2=4V24-mAOutputUpperClampVoltage(Note2)Veao(H)Isource=0.1mA-6-VOutputLowerClampVoltage(Note3)Veao(L)Isink=0.1mA-2.25-VLargeSignalOpenLoopGain(Note4)Gv-6080-dBPowerSupplyRejectionRatio(Note5)PSRR14V≤Vcc≤25V6080-dBUnityGainBandwidth(Note6)GBW--1-MHzSlewRate(Note7)SR--0.6-V/usMULTIPLIERSECTIONInputBiasCurrent(Pin3)Ib(m)--0.5-0.5uAM1InputVoltageRange(Pin3)∆Vm1-0-3.8VM2InputVoltageRange(Pin2)∆Vm2-Vref-Vref+2.5VMultiplierGain(Note8)KVm1=1V,Vm2=3.5V0.360.440.521/VMaximumMultiplierOutputVoltageVomax(m)Vinv=0V,Vm1=4V1.651.81.95VTemperatureStabilityofK(Note9)∆K/∆T-25≤Ta≤125°C--0.2-%/°CFAN7527B6ElectricalCharacteristics(Continued)VCC=14V,-25°C≤Ta≤125°C,unlessotherwisestated.Note1~14:Theseparameters,althoughguaranteed,arenot100%testedinproduction.CharacteristicsSymbolTestConditionMin.Typ.Max.UnitCURRENTSENSESECTIONInputOffsetVoltage(Note8)Vio(cs)Vm1=0V,Vm2=2.2V-10310mVInputBiasCurrentIb(cs)0V≤Vcs≤1.7V-1-0.11uACurrentSenseDelaytoOutput(Note11)td(cs)--200500nsZEROCURRENTDETECTSECTIONInputVoltageThresholdVth(det)VdetIncreasing1.722.3VDetectHysteresisHY(det)-0.20.50.8VInputLowClampVoltageVclamp(I)Idet=-100uA0.450.751VInputHighClampVoltageVclamp(h)Idet=3mA6.57.27.9VInputBiasCurrentIb(det)1V≤Vdet≤5V-1-0.11uAInputHigh/LowClampDiodeCurrent(Note12)Iclamp(d)---±3mAOUTPUTSECTIONOutputVoltageHighVohIo=-10mA10.511-VOutputVoltageLowVoIIo=10mA-0.81VRisingTime(Note13)trCI=1nF-130200nsFallingTime(Note14)tfCI=1nF-50120nsMaximumOutputVoltageV