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TPA3110D2失真度问题

Other Parts Discussed in Thread: TPA3110D2

现在用TPA3110D2驱动一个8欧姆的喇叭输出,12V供电(100mv纹波)。输入信号失真度为0.1%,但输出信号测试失真为10%,放大倍数为20db。现在观察输出方波信号,当没有音频输入时有很大的过冲和振铃(5V左右),在感觉是因为这个原因引起,请问如何处理?还有相关的技术文档?急需谢谢了!