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LM5026 OUT_A波形不正常

Other Parts Discussed in Thread: LM5026

请教一下, 手头使用LM5026做了一块DC100V到160V转24V的电源,有源钳位正激方式,在140V一下的时候,输出都正常,OUT_A的波形如图1 ,但是到140以上的时候,发现OUT_A的波形变成图二的样子,目前还不知道问题出现在哪里,希望大侠帮忙分析解决,谢谢~~