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大功率电源

Other Parts Discussed in Thread: UCC28950, UCC28070

现在用的UCC28950,输入交流220V进行整流。输出直流14.5V,,输出电流可达50A,当进入恒流状态时,负载变大,但是电流稳定在50A,此时就是恒流状态,此时变压器就会发出响声,电流变的不稳定,请问这如何解决?谢谢