本人设计的一款100W开关电源用的是384**产品反激电路,输出12V100W,变压器也换了几次,MOS管也换了,肖特基也换了,原本以为可以顺顺当当的出货,谁知老化测试时老炸机,哎有心的XDJM请帮忙分析一下了
谢谢了
特郁闷,100W电源老炸机
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@wxy2003
EI33600uH12N60
How many is Working Frewuency?
Maybe the MOSFET is too poor.Did you test the MOSFET temperature?I think if it is not open-frame,but a adapter,that will cause the mosfet overheat,damaged the MOSFET.
Maybe change the MOSfet to a super one is a solution.
Of course,confirming the transformer was not saturated is necessary.
Maybe the MOSFET is too poor.Did you test the MOSFET temperature?I think if it is not open-frame,but a adapter,that will cause the mosfet overheat,damaged the MOSFET.
Maybe change the MOSfet to a super one is a solution.
Of course,confirming the transformer was not saturated is necessary.
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@fei90
耐壓是夠的,除非你的吸收電路跟TRANSFOMER有問題,應該是你的MOS電流不夠你用的10A的MOS是在環境溫度25度測的數據.你可以查你的DATASHEET,在100度的時候你的電流可能就只有6A了,這樣造成你的MOS損壞.MOS壞了的話你的源極限流電阻,保險,3842都有可能損壞.不知你做過ON/OFF試驗沒有???
这样规格的电路600V的耐压肯定不够 12V8A以上的输出规格 漏感尖峰是很大的 无论你怎么样改善变压器的绕制工艺 其尖峰还是大于100V以上 而且变压器的铜损也是一个不能小视的问题 这种规格的反激电路 比较难做
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@superpowersupply
HowmanyisWorkingFrewuency?MaybetheMOSFETistoopoor.DidyoutesttheMOSFETtemperature?Ithinkifitisnotopen-frame,butaadapter,thatwillcausethemosfetoverheat,damagedtheMOSFET. MaybechangetheMOSfettoasuperoneisasolution.Ofcourse,confirmingthetransformerwasnotsaturatedisnecessary.
频率是75K
MOS管用了7A-20A的都试过,同样会在盖壳后炸机
MOS管用了7A-20A的都试过,同样会在盖壳后炸机
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