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求教!LMZ14203H输出振荡!

Other Parts Discussed in Thread: LMZ14203H

用LMZ14203H设计了一个24V-12V的DCDC转换器,原理图见附件1

输出滤波电容采用了47uF/16V的陶瓷电容,但是输出信号发生振荡,振荡频率180Hz左右,不知道问题出在哪里?请高手解答一下,谢谢了

是因为输出电容ESR太大吗?但是陶瓷电容的ESR应该已经比较小了,但是查不到具体的ESR值

输出振荡的波形见附件2