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LM5085: FET selection affect ripple injection value?

Shotaro Sakai
Intellectual 2490 points
Part Number: LM5085

Hello team,

Does Q1 selection affect the value of ripple voltage on Type-3 Ripple Circuit?

Best regards,

Shotaro

  • +1
    TI__Expert 3766 points

    Hi Shotaro,

    Q1 selection affects your maximum ON time selection for FSW and RT, which affects your equation for choosing ripple voltage components. See section below where R3 and C1 are dependent on ON time:

    Regards,

    Henry