• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 73 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS54327: FB voltage ramp up abnormally

Given Ding
Expert 7325 points
Part Number: TPS54327

Hi Team, 

below is a question on TPS54327. we found FB voltage ramp up abnormally which stops switching, but Vout is normal. To my opinion, it seems like there is noise coupling on FB pin. Please kindly add your comments. 

CH1= Vout, Ch2=SW, Ch3=FB 

BRs

Given

  • 0
    TI__Expert 7500 points

    Hi Given,

    For 12Vin-3.3Vout, recommended inductor in DS is only 2.2uH. Why use 10uH inductor in customer side? It's better to upload the layout to check the layout whether FB trace is noised by other signals. Tahar will give you more comments.

    Thanks,

    Lishuang