小弟用TOP249Y做的反激电源,输入220V交流,5.00V输出路纹波感觉很诡异,下面两幅图是不同幅格显示下的输出纹波,用的是Agilent54622D示波器,请高人帮忙分析,
尤其是感觉到在锯齿波3个拐点处的振荡不知从何而来.
1133769477.tif1133769492.tif
TOP249Y反激做的电源,5.00V输出纹波求助
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上面两幅图是这样滴
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