FP6716升压方案.pdf

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1、fitipowerintegratedtechnologylnc.FP671685T5V,8A,550KHzHighEfficiencyLowRippleSynchronousStep-UpConverterDescriptionFeaturesTheFP6716isahighefficiency,fixedfrequencyHighEfficiencyupto90%550KHz,currentmodePWMboostDC/DCconverterLowRDS(ON)IntegratedPowerMOSFETwhichcouldoperatebatterysuchasinputvo

2、ltageNMOS50mΩ/PMOS60mΩdownto2.5V.TheconverteroutputvoltagecanbeWideInputVoltageRange:2.5Vto5.25Vadjustedtoamaximumof5.25VbyanexternalFixed550KHzSwitchingFrequencyresistordivider.BesidestheconverterincludesaLow-PowerModeforLightLoadConditions0.05ΩN-channelMOSFETswitchand0.08Ω±2.0%VoltageRef

3、erenceAccuracyP-channelsynchronousrectifier.SonoexternalAdjustableCurrentLimitSchottkydiodeisrequiredandcouldgetbetterPMOSCurrentLimitforShortCircuitProtectionefficiencynear90%.LowQuiescentCurrentOutputRippleunder200mV(ScopeFullTheconverterisbasedonafixedfrequency,currentBandwidth)mode,puls

4、e-width-modulationPWMcontrollerthatInputUnderVoltageLockoutgoesautomaticallyintoPSMmodeatlightload.InternalCompensationFunctionBuilt-InSoftStartFunctionWhenconverteroperationintodiscontinuousmode,Over-TemperatureProtectionwithAutoRecoverytheinternalanti-ringingswitchwillreduceOutputOvervol

5、tageProtectioninterferenceandradiatedelectromagneticenergy.SOP-8(ExposedPad)Pb-FreePackageTheFP6716isavailableinaspace-savingSOP-8(ExposedPad)packageforportableapplication.ApplicationsPortablePowerBankWirelessEquipmentHandheldInstrumentGPSReceiverPinAssignmentsOrderingInformationSPPackage(

6、SOP-8ExposedPad)FP6716□□□TR:Tape/ReelVIN18PGC:GreenOUT297LXFB3PGND6ENPackageType5SP:SOP-8(ExposedPad)GND4ILIMFigure1.PinAssignmentofFP6716FP6716-Preliminary0.1-MAY-20131fitipowerintegratedtechnologylnc.FP671685TTypicalApplicationCircuitR4L1VINVOUTC24.7μHC82.5Vto5.5V5V/3A0.1μFD1C3C4C1722μF1LX222

7、μF0.1μFR1VINOUTX2525KFP671658ILIMPGRILIMR263可调限制输入电流脚ENFB100KPGNDGNDON94OFFFigure2.TypicalApplicationCircuitILIMResistanceValue(MΩ)TypicalInputLimits(A)0.5814224180.5FunctionalPinDescriptionPinNamePinNo.PinFunctionVIN1PowerSupplyI