基于ADI隔离电源控制器的解决方案.doc

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1、基于ADI隔离电源控制器的解决方案ADuM30701隔离器是一款稳压DC/DC隔离电源控制器，集成内部MOSFET驱动器。该DC/DC控制器原边内置一个隔离式PWM反馈，采用iCoupler®芯片级变压器技术和完整的回路补偿。可以不必采用光耦合器进行反馈以及为了稳定性而补偿环路。方案特点：TheEVAL-ADuM3070EBZdemonstratestwoseparateapplicationsfortheADuM3070isolatedswitchregulatorwithintegratedfeedback.Ithastwoindependentpow

2、ersupplycircuits:adoublesupplyandasinglesupply.Theswitchingfrequencycanbesetfrom200kHzto1000kHz.TheboardsupportsavarietyofI/Oconfigurationsandmultipletrans-formeroptions.ItisequippedwithtwoADuM3070isolators.TwoindependentandisolatedcircuitscomprisetheADuM3070evaluationboard.Thesin

3、glesupplyisconfiguredasa5Vsecondaryisolatedsupplywitha5Vprimaryinputsupply,whichcanprovideupto2.5Wofregulated,isolatedpower.Itcanbereconfiguredfora3.3Vsecondaryisolatedsupplywitha5Vor3.3Vprimaryinputsupply(seetheOtherInputandIsolatedOutputSupplyOptionssection).TheEVAL-ADuM3070EBZs

4、upportsmultipletransformeroptions.ThesinglesupplyisequippedwithaHaloTGSAD-260V6LF(T1)oraCoilcraftJA4631-BL(T2)1:2turnsratiotransformer.TheCoilcraftfootprintisoffsettotheleftoftheHalofootprint.Figure5andFigure7showtheefficiencycurvesforthesinglesupplyoperatingwithaCoilcraftandaHalo

5、transformer,respectively.原理图：原理图1原理图2PCBlayout