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TPA3131输出端有3.8V直流偏置



TPA3131供电电压7.5V;输出波形正常(前端DA出的正弦波),只是有个直流偏置在3.8V;

看手册,是在输入的时候加了3V的偏置(不明白为什么会在这里加3V偏置),我想3.8V的输出是不是和这个有关系!

能不能通过配置把这个直流偏置去掉,我怕烧坏后级的喇叭!

谢谢!