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CLLLC DAB secondary side low-leg Vds ringing problem.

Hin
Hin Contributor Level 1
edited April 2023 in Module Products

Hi Sir/Madam,

I have facing a problem which is the ringing happening on the low leg(Vds ringing) of the secondary side. 

Do you have any experience with that?

How can I examine the root cause? parasitic inductance? layout? trr?

How can I reduce the ringing? Add a snubber?

Thanks a lot.

Comments

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5

    Hello, thank you for your message. A member of our technical team is looking into your questions and we will respond shortly. 

  • jshao
    jshao Wolfspeed Employee - Contributor Level 2

    Hi Hin,

    First check the gate timing of the secondary side. Is the sync rectification timing right? If the timing is not right, miss-alignment can cause significant ringing. Do you have waveforms?

    BR,

    Jianwen

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5

    Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.

This discussion has been closed.