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同步降压芯片LM25116发烫问题

Other Parts Discussed in Thread: LM25116

LM25116芯片发烫:在空载状态下也些发烫,输入24V时电流=0.02A(空载)。

不知道哪里可以改进,包括原理图和PCB上。这颗IC可以输出7A,现在我到3A时就烫的摸不上。