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Lm5118

Other Parts Discussed in Thread: LM5118

LM5118 做Dc/Dc ,发现特别容易损坏,整个下午几乎都在换芯片了,还整废了两个板子。现象是这样的,刚开始的时候带载不起,调了调缓启动电容好了。但是输出只要一过载或短路,芯片就坏,16脚和18脚短路了,甚至有一回电负载的正负加错了也坏了。请问这是为什么,这么脆弱?