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WEBENCH® Tools/TPS54335A: The ligth load operation of TPS54335A

takahiko yokota
Mastermind 7135 points
Part Number: TPS54335A

Tool/software: WEBENCH® Design Tools

Hi


I simulate TPS54335A under Vin=21V, Vout=5V, Iout=0.05A.
I think this device operates pulse skip mode this condition,
but the operation mode is CCM on Webench.
Could you tell me this reason?
Best regards,
Yokota
  • 0
    TI__Mastermind 21795 points

    Yokota,

    Only the CCM/FCCM operation is modeled for this device. The inductor is chosen in a way to keep the device in CCM. If the current is low enough that the inductor ripple current is large enough than the average value, then the device enters FCCM (forced CCM). Hope that helps.

    Regards,

    Amod