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tpa3255 放大器输入1K正弦波,出现过热问题。

Other Parts Discussed in Thread: TPA3255

电源电压:48V;

输入信号:正弦波  f=1K,Vpp=3.5V;

输出信号:正弦波  f=1K, Vpp=45V;(波形出现轻微失真)

负载:4欧姆,BTL工作模式;

问题:输入信号的频率为1K时,工作20s后FAULT置低(出错,确定是OTE),输入频率10K时,可正常10min。