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TPA3112上电1-3秒后无输出

大家好

用TPA3112设计的一个音频功放电路

输入采用差分的,后来把1个输入接地,变成了单端的了

问题很奇怪

接信号发生器,上电后,1-3秒内有音频输出,能够听到声音

然后就没有声音了

FAULT输出低

折腾了很久,望高手指点一二