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TPA3130D2: TPA3130D2 1SPW 问题

Part Number: TPA3130D2

您好

    如下图:

    R47不焊接,默认为1SPW模式,R51:0ohm ,增益电阻5.6k 20db,黄色为输入,蓝色为输出(单端),输入不到200mV,输出失真了,不知道哪里出现问题。

   去掉R46,焊接R47 0ohm,模式为BD,输出正常,按照20db增益放大,问题是1SPW模式下,哪里出问题了?

问题波形。