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tpa3112d1音频功放DC检测?



按datasheet电路连接。上电后每过420ms复位一次,将输入2端短路接地仍然相同。增益均接地。该如何检查电路?将1,2脚断开,输出25脚1.5-1.6V,输出18脚2.12伏左右。