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TPA3110D2,上电瞬时接通后又无输出,请问是何原因?怎样解决?

Other Parts Discussed in Thread: TPA3110D2

TPA3110D2双通道,按SLOS528D/TPA3110D2资料图37典型连接,上电短瞬接通后,又关闭,检测SD/FAULT脚的电位,上电瞬间为高,而后不到1秒变低,输出无声。但同样的有些电路板就正常。请问是何原因?怎样解决?