帶容性負載時OVER SHOOT 問題

一100W正激電源,在帶容容性負載時OVER SHOOT 嚴重,求助如何解決,用UC3843芯片.

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janysophia

LV.3

2008-04-26 23:55

有過經驗的同胞來頂下啊

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血月狼2008

LV.1

2008-05-04 11:56

@janysophia

有過經驗的同胞來頂下啊

帶電容能力一般都和芯片供電有關,希望把電路貼上來,再具體分析

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b.r.g.j.wallace航天電源

LV.8

2008-05-05 14:06

你指的是輸出電壓過沖?
沒有軟啟動么?

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janysophia

LV.3

2008-05-06 21:49

@b.r.g.j.wallace航天電源

你指的是輸出電壓過沖?沒有軟啟動么?

有軟啟動的,用的3843芯片

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janysophia

LV.3

2008-05-06 21:49

@janysophia

有軟啟動的,用的3843芯片

是輸出,帶容性負載的時候,OVERSHOOT嚴重,

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temp1234

LV.5

2008-05-12 19:57

@janysophia

是輸出,帶容性負載的時候,OVERSHOOT嚴重,

You can try to reduce the smooth chock, may help you!
Good Luck!

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janysophia

LV.3

2008-05-12 20:27

@temp1234

Youcantrytoreducethesmoothchock,mayhelpyou!GoodLuck!

smooth chock 是后面的那個濾波電感嗎?

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temp1234

LV.5

2008-05-13 09:29

@janysophia

smoothchock是后面的那個濾波電感嗎?

yes! In general case, try to low-down the ripple&noise then you have a over smooth-chock. But in Muiltiple-layer PCB case, you will easy to have a too-small chock --- this case should cover by soft-start function!

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janysophia

LV.3

2008-05-15 19:32

@temp1234

yes!Ingeneralcase,trytolow-downtheripple&noisethenyouhaveaoversmooth-chock.ButinMuiltiple-layerPCBcase,youwilleasytohaveatoo-smallchock---thiscaseshouldcoverbysoft-startfunction!

多謝,我去試試看.

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