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TAS5630 2.1CH 声道 分离度问题

Other Parts Discussed in Thread: TAS5630

PVDD:44V

GVDD:12V

散热器接地良好,加载功率输出正常

A+B  4欧负载

C/D  2欧负载

问题现象:当A+B输出时(空载或者加载)  ,C,D分离度很低

                   断开R29,R30,加大C20,C23至0.1uF,问题同样存在。

                   C与D之间互相干扰。

                   当A+B输入100HZ ,随着输出幅度增大,C,D会有干扰输出,输出频率随A+B幅度增大而增大。

                   当将PCB改成2*BTL模式时 ,CMRR提高,性能良好

                   请问SE模式时,IC如何提高扰干扰能力?

2.1CH AMP TAS5630.pdf