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1、CirrusCS1501高效250WPFC电源解决方案Cirrus公司的CS1501是高性能数字功率因素修正(PFC)控制器,它能动态管理PFC,从而在很宽负载范围内得到高效率.CS1501具有零电压开关拓扑,欠压锁住(UVLO),输出过压保护,逐个周期的限流,开路/短路保护和热关断,主要用在LCD和LED TV,笔记本电脑,服务器/通信设备.本文介绍了CS1501主要特性,方框图,典型应用电路图以及CS1501250W高效PFC演示板主要特性,电路图,材料清单和PCB元件布局图表. TheCS1501is
2、ahigh-performancedigitalpowerfactorcorrection(PFC)controllerdesignedforswitchingmodepowersupply(SMPS)applications.TheCS1501activELymanagesthepowerfactorcorrectionwhileachievinghighefficiencyoverawideloadrange.TheCS1501adaptivelycontrolstheinputACcurrentsot
3、hatitisinphasewiththeACmainsvoltage,anditswaveformmimicstheinputvoltagewaveform.ThePFCcontrollerexecutesadaptivedigitalalgorithmsdesignedtoshapetheACmainsinputcurrentwaveformtobeinphasewiththeinputvoltagewaveform.TheCS1501isequippedwithazero-currentdetecti
4、on(ZCD)circuitprovidingthePFCdigitalcontrollerthecapabilitytoturnontheMOSFETwhenthevoltageacrossthedrainandsourceisnearzero.Additionally,acurrent-sensingcircuitisincorporatedforinstantaneousovercurrentprotection.CS1501主要特性:•DigitalEMINoiseShaping•AdaptiveD
5、igitalEnergyController•ExcellentEfficiencyUnderAllLoadandLineConditions•Zero-voltageSwitchingTopology•MinimalExternalDevicesRequired•AdaptiveDigitalControlLoop•ComprehensiveSafetyFeatures•UndervoltageLockout(UVLO)•OutputOvervoltageProtection•Cycle-by-cycle
6、CurrentLimiting•Open/ShortLoopProtectionforIAC&IFBPins•ThermalShutdown•PinPlacementSimilartoTraditionalBoundaryMode(CRM)ControllersCS1501应用:qLCDandLEDTVsqNotebooksqServer/Telecom图1.CS1501方框图图2.CS1501典型应用电路图S1501250W高效PFC演示板TheCDB1501-250Wboarddemonstratest
7、heperformanceoftheCS1501digitalPFCcontrollerwitha250Wattoutputatalinkvoltageof400volts.TheCDB1501-250WboarddemonstratestheperformanceoftheCS1501withinputvoltagerangeof90-265VAC,typicallyseeninuniversalinputapplications.ThisboardhasbeendesignedforaVlinkof40
8、0V,250Watts,fullload.Extremecautionneedstobeexercisedwhilehandlingthisboard.Thisboardistobeusedbytrainedprofessionalsonly.PriortoapplyingACpowertotheCDB1501-250Wboard,theCS1501needstobebiasedusinganexternal13
