Design a Flybuck Solution With Optocoupler to ImproveRegulation Performance用光耦合器设计一种调节性能地飞溅溶液.pdf

Design a Flybuck Solution With Optocoupler to ImproveRegulation Performance用光耦合器设计一种调节性能地飞溅溶液.pdf

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时间:2020-03-27

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1、ApplicationReportSNVA727–January2015DesignaFlybuckSolutionWithOptocouplertoImproveRegulationPerformanceJohnnyGuo,DanielLiABSTRACTThispaperpresentsanisolatedflybuckdesignwithsynchronousbuckregulatorLM5160usingoptocouplerforbetterregulationperformance.Comparedwithtypicalisolated

2、flybacksolution,flybucktopologyhasoutstandingfeatureslikehigherfrequency,smallersolutionsize,andbetterefficiency.Higherperformanceandreliabilityrequiresbetterinputandloadregulation.Fortypicalflybuckdesign,theisolatedoutputvoltageisonlycontrolledbyprimaryoutputvoltageandtransfo

3、rmer.Thereforetheinputandloadregulationcannotbeensured.Aimingatthis,anoptocouplerisaddedintothedesignascompensationtoimproveregulationperformance.Thispaperincludesapplicationdesignandtestresults.Contents1Introduction.............................................................

4、.....................................................................22DesignFlybuckWithLM5160......................................................................................................22.1SelectionofPrimaryVoltageandTurnsRatio.......................................

5、................................32.2FeedbackResistor.................................................................................................................32.3SecondaryRectifierDiode.....................................................................................

6、................32.4TransformerCalculation........................................................................................................42.5InputandOutputCapacitor....................................................................................................42.6

7、RippleInjectionCircuit...........................................................................................................52.7LM5160FlybuckSchematic...................................................................................................63DesignFlybuckWithOpto

8、coupler......................................................

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