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LM27402 HG和LG有回沟和振铃处理

Other Parts Discussed in Thread: LM27402

各位老师:

       我想请教各位一个问题,我最近在使用LM27402电源的时候,在HG和LG测试波形的时候有一些回沟,在gate上面串了1R电阻后有改善,但是还不能消掉。

下面是HG的波形

下面是这个LG波形(绿色波形)

还请各位老师给指导一下,这个是什么原因导致的。谢谢了