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上管的驱动波形
下管没有驱动波形,即便有它也是外部电源引入的噪声
破案了,mos管淘宝上买的
很高兴您的问题得到解决。
其实更换MOS以后并未解决问题,芯片的震荡不正常,具体情况可以查看我新发的帖子
您可以尝试参考下面资料进行检查:
LM5148-LM25148DESIGN-CALC
LM25149-Q1EVM-2100 PCB Layout Files
LM5149-Q1EVM-400
LM25149-Q1EVM-2100
PMP31252