资源描述：
《llc谐振半桥转换器fsfr2100192wlcdtv电源方案》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、LLC谐振半桥转换器FSFR2100192WLCDTV电源方案Fairchild公司的192WLCDTV电源方案采用FSFR系列器件FSFR2100,额定输出功率192W,输出电压24V/8A,输入电压400V,效率大于94%,具有多种保护功能以增加系统可靠性.本文介绍了FSFR2100的主要特性,功能方框图,LLC谐振半桥转换器典型应用电路以及FSFR2100评估板电路图和材料清单(BOM).TheFSFR-seriesareahighlyintegratedpowerswitchesdesignedforhigh-efficien
2、cyhalf-bridgeresonantconverters.Offeringeverythingnecessarytobuildareliableandrobustresonantconverter,theFSFR-seriessimplifiesdesignsandimprovesproductivity,whileimprovingperformance.TheFSFR-seriescombinespowerMOSFETswithfast-recoverytypebodydiodes,ahigh-sidegate-drivec
3、ircuit,anaccuratecurrentcontrolledoscillator,frequencylimitcircuit,soft-start,andbuilt-inprotectionfunctions.Thehigh-sidegate-drivecircuithasacommon-modenoisecancellationcapability,whichguaranteesstableoperationwithexcellentnoiseimmunity.Thefast-recoverybodydiodeoftheMO
4、SFETsimprovesreliabilityagainstabnormaloperationconditions,whileminimizingtheeffectofthereverserecovery.Usingthezero-voltage-switching(ZVS)techniquedramaticallyreducestheswitchinglossesandefficiencyissignificantlyimproved.TheZVSalsoreducestheswitchingnoisenoticeably,whi
5、challowsasmall-sizedElectromagneticInterference(EMI)filter.TheFSFR-seriescanbeappliedtovariousresonantconvertertopologiessuchasseriesresonant,parallelresonant,andLLCresonantconverters.FSFR2100主要特性:VariableFrequencyControlwith50%DutyCycleforHalf-bridgeResonantConverterTo
6、pologyHighEfficiencythroughZeroVoltageSwitching(ZVS)InternalSuperFETswithFast-RecoveryTypeBodyDiode(trr=120ns)forFSFR2100andUniFETswithFast-RecoveryTypeBodyDiode(trr<160ns)forFSFR2000/1900/1800/1700.FixedDeadTime(350ns)OptimizedforMOSFETsUpto300kHzOperatingFrequencyPuls
7、eSkippingforFrequencyLimit(Programmable)atLight-LoadConditionRemoteOn/OffControlUsingControlPinProtectionFunctions:Over-VoltageProtection(OVP),Over-LoadProtection(OLP),Over-CurrentProtection(OCP),AbnormalOver-CurrentProtection(AOCP),InternalThermalShutdown(TSD)FSFR2100应
8、用:PDPandLCDTVsDesktopPCsandserversAdaptersTelecomPowerSuppliesAudioPowerSupplies图1.FSFR2100方框图图2.典型应用电路图(LLC谐振
