• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 1365 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS54360: TPS54360 EMI exceeded the standard in 800Khz.

Xiaogang Tian49
Prodigy 235 points
Part Number: TPS54360


HI,

   The customer test EMI for TPS54360, but  EMI exceeded the standard in 800Khz. Please help to check schematic,  PCB Layout and EMI reprot.

   Please hlep to give some suggestion, thanks!

  • 0
    TI__Genius 11085 points
    Is the switching frequency of the TPS54360 at 800kHz? Can you measure the frequency in time domain and see it matches one of the peaks in the EMI measurement or not. The peak which is over the limit seems at a lower frequency than 800khz. Why there are so many lower frequency peaks than 800kHz in the EMI measurement? Are there other switching converters on the same board?

    For the improvment in the schematic, I would suggest to use higher capacitance at the input of the pi filter, try a 10uF or 4.7uF. The filter inductance can be lower, try a 10uH or 4.7uH. You can also add a snubber RC from SW to GND.

    -Yang
  • 0 in reply to YangZhang
    TI__Genius 11085 points
    I am closing this post for now due to lack of response. The thread will be open again if a new response is posted.

    -Yang