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TPA3251失真

Other Parts Discussed in Thread: TPA3251

HI 你好,我有个关于TPA3251的问题想咨询一下,我按规格书上的PBTL,但是4欧时即使在空载的情况下超过100W就开始失真了,波型很像被限幅(如附档)

  测试的喇叭输出座子电压为22V(用36V供电),占空比为66%,正常情况应为喇叭座子测量直流为36/2=18V,占空比为50%左右。

 请问这种情况下,一般哪里出问题多?