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D类功放级联底噪明显

Other Parts Discussed in Thread: TPA3113D2

Hi 

我们公司有一个项目采用RK3288 (CPU)+ ALC5640(Audio Codec)+ TPA3113D2 (Amplifier)方案。由于在之前产品做功放升级,所以从ALC5640的speaker 左右声道信号作为TPA3113D2 input信号。但发现TPA3113D2 的输出底噪明显,想请问这种D类级联是否正确的应用设计?

Andy Guo