搜索
FairchildFSEZ1016A高度集成PWM电源控制方案关键词：电源管理,DC/DC转换器,FSEZ1016AFairchild公司的FSEZ1016A是高度集成PWM控制器,能使小功率反激转换器增加性能,简化电路设计,特别是电池充电器的应用.FSEZ1016A的起动电流仅为10uA,允许使用高的起动电阻,从而进一步降低了功耗.工作电流为3.5mA,主要用在手机,无绳电话,PDA,数码相机的电池充电器,以及替代线性变压器和RCC开关电源.本文介绍了FSEZ1016A主要特性,方框图,典型应用以及5W(5V/1A)应用电路图和所用材料清单.FSEZ1016A:Primary-Side-RegulationPWMIntegratedPowerMOSFETThishighlyintegratedPWMcontrollerprovidesfeaturestoenhancetheperformanceoflow-powerflybackconverters.TheproprietarytopologyofFSEZ1016Aenablessimplifiedcircuitdesign,especiallyforbatterychargerapplications.Alow-cost,smaller,andlighterchargeristheresultwhencomparedtoaconventionaldesignoralineartransformer.Thestartupcurrentisonly10μA,whichallowslargestartupresistanceforfurtherpowersaving.Tominimizethestandbypowerconsumption,theproprietarygreen-modefunctionprovidesoff-timemodulationtolinearlydecreasePWMfrequencyunderlight-loadconditions.Thisgreenmodeassiststhepowersupplyinmeetingpowerconservationrequirements.ByusingFSEZ1016A,achargercanbeimplementedwithfewerexternalcomponentsandminimizedcost.FSEZ1016A-seriescontrollerisavailableinthe7-pinSOICpackage.FSEZ1016A主要特性:Constant-Voltage(CV)andConstant-Current(CC)ControlWithoutSecondary-FeedbackCircuitryAccurateConstantCurrentAchievedbyFairchild’sProprietaryTRUECURRENTTMTechniqueGreen-ModeFunction:PWMFrequencyLinearlyDecreasingFixedPWMFrequencyat42KHzwithFrequencyHoppingtoSolveEMIProblemsCableCompensationinCVModeLowStartupCurrent:10μALowOperatingCurrent:3.5mAPeak-Current-ModeControlinCVModeCycle-by-CycleCurrentLimitingVDDOver-VoltageProtection(OVP)withAuto-RestartVDDUnder-VoltageLockout(UVLO)FixedOver-TemperatureProtection(OTP)withLatchSOIC-7PackageAvailableFSEZ1016A应用:BatteryChargersforCellularPhones,CordlessPhones,PDA,DigitalCameras,PowerToolsBestChoicetoReplaceLinearTransformerandRCCSMPS图1.FSEZ1016A内部方框图图2.FSEZ1016A典型应用图3.采用FSEZ1016A的5W(5V/1A)应用电路图5W(5V/1A)应用电路图材料清单(BOM):初级边调整(PSR)PWM控制器和EZ-SwitchFAN100/FAN102/FSEZ1016A/FSEZ1216的设计和应用DesignandApplicationofPrimary-SideRegulation(PSR)PWMControllerandEZ-SwitchFAN100/FAN102/FSEZ1016A/FSEZ1216图4.FSEZ1016A(FAN100+MOSFET)应用电路图5.FSEZ1016A(FAN100+MOSFET)(5V/1A)应用电路(5V/1A)应用电路材料清单:AO-Electronics傲壹电子官网：中文网：