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LM5022试验遇到的问题

Other Parts Discussed in Thread: LM5022

用LM5022芯片做了一个升压电源  输入12-30V   输出36V4A   电路搭接完    遇到以下问题   空载输出36V工作正常     带载2.5A左右 mos(mos用的aot460)很烫   求教怎么把mos温度下来

万用表测量芯片5脚(out)2.1V  示波器看波形像一个漏斗   这个波形对吗 ?