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LM25118 noice

Chimpins Chimpins
Prodigy 10 points
Other Parts Discussed in Thread: LM25118

Dear support TI.

We make  one dc - dc converter with the LM25118, the drive works fine.
The problem is that it generates a lot of interference on the FM band, we tested different EMi filters but not do away with noise.

What can be the cause?.

Best regards

  • 0
    TI__Guru 59001 points

    Hi

    EMI filter might not remove the noise perfectly, but at least you should be able to see an improvement. 

    If you could not see any improvement with a filter, this means your filter was not working well or that was not the noise source.

    Usually, MOSFET gate resistance, Qrr, Quality of PC board layout affects FM band noise.

    Regards,