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UC3854B: Abnormal output waveform

Genius 3195 points

Replies: 2

Views: 484

Part Number: UC3854B

Hello,

Make UC385BDW board, and under testing.

But Several boards are abnormal output waveform as attached. Many others are normal output waveform.

Could you let me know why this kind of symptom occurred? 

Is it related with UC3854BDW  IC damage?

Regards,

Nicky

  

  • Hello Nicky,
    It looks like for some reason the UC3854B is shutting down and re-starting. This could be a protection feature being triggered, a design issue, a mechanical issue with the pcb or a damaged ic.
    Regards
    John
  • In reply to John Griffin1:

    Hello John,

    If IC is damaged, could you let me know which kind of damage or why got a damage?

    Regards,
    Nicky

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