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我选型的mos管是WSF40N10AN沟道.100V.31A.42mΩ，我应用于55输入，38V，3A输出，mos管却持续的发烫，是我mos管选型的不对吗？
50V输入电压，38V输出，3A，mos管如何选型Rdson和Qg
