
输入电压48V,输出电压5V,频率设置未390khz,测量发现输出电压纹波非常大,请问如何排查肯可能是那部分的原因,谢谢!
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Hi
这个是轻载时的波形,能够将输出波形放上来看一下? 纹波具体多大?
建议你用webench确认一下电路,主要是要确认补偿电路(环路补偿,确认反馈是否稳定), 其次就是layout,尽量按照datasheet参考和要求来做。