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UCC27517A-Q1: RC Filter IN+ input on UCC27517A-Q1

Gerald Choi
Expert 1400 points
Part Number: UCC27517A-Q1

Hi AC/DC Team

I want to design RC Filter circuit in IN+ input line because PWM noise as a blow

input spec: 12V, 500Khz, Vp-p: 0 ~ 5V

Do you recommend R1 value range and C18 value?

Thanks

Best Regards

Gerald

  • 0
    TI__Expert 3555 points
    Hi Gerald,

    If you need a filter on the input PWM we recommend a small filter (avoiding trying to 'shape' or delay the signal with a large filter). In your schematic, R1 in the range of 10-100 ohm and C18 in the range of 10-200pF, such that you can filter out the noise you are seeing on the input.

    Regards,
    Will Toth