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My power supply shutdown due to this ringing output voltage . May I know what could cause this ringing ? Thanks

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put on hold as unclear what you're asking by Hearth, winny, JYelton, Edgar Brown, SamGibson Feb 13 at 4:13

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ Welcome :-) Unfortunately there are nowhere near enough details in your question. Therefore please edit the question and add (a) more details about the power supply (make, model, link to datasheet etc.); (b) details about the ringing (e.g, oscilloscope traces, test conditions, your experiments etc.); (c) your analysis which makes you claim that the ringing is the cause of the PSU shutdown, and not any other cause. Otherwise your question might be closed as unclear. Please see the tour and help center. You need to supply all relevant details, and show your own work, when asking a question. Thanks. \$\endgroup\$ – SamGibson Feb 11 at 21:55
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    \$\begingroup\$ Any unloaded LC filter or switching regulator causes ringing due to the unloaded high Q. normally a ZVS or a preload to dampen the Q or an RC phase lead compensation on the DC feedback voltage can improve the poor phase margin that induces ringing from a transient. \$\endgroup\$ – Sunnyskyguy EE75 Feb 11 at 22:44