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WEBENCH® Tools/LM3481: frequency is not settable or changeable

Vern Bunch
Intellectual 520 points
Part Number: LM3481

Tool/software: WEBENCH® Design Tools

hi, using web bench for my sepic design, which is nice, but the frequency is not settable or changeable.

if I use advanced options, it only allows +-5%.  not a stoppable problem.  but it "crashes", won't work with the advanced frequency option.

also, when I change BOM inductor and inductance values, I expect the frequency to change accordingly, but it remains fixed at 507khz.

what to do?

  • 0
    TI__Mastermind 21720 points
    Hi Vern,

    Thanks for reaching out to us for your question.

    I was able to adjust the frequency by checking the user preferred frequency box. Nothing crashed either. Please make sure that your internet browser if up to date.

    The switching frequency is taken as a design parameter. Since switching frequency is considered a fixed parameter it will not change when the inductance value is changed.

    Thanks,

    Garrett