TPA3112上电瞬间有输出,但没多久SD和FAULT就被拉低了,但芯片不烫、没接LC滤波,会是什么问题呢
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你好:
芯片不发烫就SD,直流检测引起SD的原因比较大。
你检查一下前级输入差分是否存在直流,还有差分输入的两端阻抗是否匹配。