我用LM5176设计的一个100W升降压DCDC,输入9~15V,输出5V。发现在空载或者0~4A带载,都无法正常连续工作,电感有高噪音,并发热严重。从全桥前端电感波型以及MOS驱动波形可见,LM5176工作于DCM模式。不知是什么原因导致的。
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