PIengineer,Ihavemadethesameexperimentwithoutstackfettopology.Thentheefficiencyisthesamewithbeforeresult.TherebyIthinkmaybetheissueisnottheIC.UntilnowImakesomeotherimprovmentonthat,andtheefficiencyisabout68,55%.Itislittlemorehighterthanbefore.NowIwillattachmenttheschematic,andpleasehelpmeimprovethat.Ihopethatefficiencycanreachover70%at750mWoutputpower.andinputvoltageisfrom300-600Voutputpowerisabout750mW.132311190300361.pdf

PI的工程师不在吗?怎么没有回复呢?自己顶一下,坛子里的电源高手给个建议,看看有没有什么办法解决效率问题,明天我会将原理图以及PCB的图放上来,请高手赐教!

Today,Imadesomeimprovementsontheflybackconverter.Untillnowtheefficiencyisupto54,66%at380VDCinput.Inordertomakethefurthersteponefficiency,CouldPIexpertbringsomesuggestionsonthat.Thx.

Noanyanswer?PIAE:couldgivemesomesuggestiononthat?whatkindofmethodswouldbeposibilityforrealizingthehighefficiencyamingtothehighvoltageinputandlowpoweroutput?

我的邮箱是:liujiehit2000@sohu.com  谢谢!

用acrobat软件打开!

万分感谢!:)