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LM5000 flyback电路动态负载情况下变压器啸叫

Other Parts Discussed in Thread: LM5000

关于LM5000这颗心片有个问题想请教一下(附件为原理图)

    1)目前在调试lm5000时,发现动态负载情况下,LM5000电路中的变压器会啸叫

    2)变压器啸叫声音与动态负载重复频率(动态负载重复频率在2.7K—6.25K之间)有关

    请问针对这个问题,是否有什么好的解决办法