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TPS23731EVM-095: how to reduce noise on power transformer

Poh Kok Keng
Genius 5512 points

Part Number: TPS23731EVM-095

Dear expert,

I can hear the noise from TPS23731EVM-095 POE transformer when in operation at 10Khz range.

Can I know any advice how can i reduce the noise at POE transformer

Best regards,

Felix

  • 0
    TI__Mastermind 37111 points

    Hi Poh Kok,

    Thanks for reaching out!

    In your TPS23731EVM-095 testing, do you set the switching frequency at 10-kHz or you set the dithering frequency at 10-kHz?

    I do not think the switching frequency can be set at 10-kHz considering the transformer was designed at the 250-kHz normal operation. 10-kHz may saturate the flyback transformer.  

    Best regards,

    Diang