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WEBENCH® Tools/TPS40304: How do I change FET selection to use alternate TI FET combination that is not provided in the predefined list?

Part Number: TPS40304
Other Parts Discussed in Thread: CSD16340Q3

Tool/software: WEBENCH® Design Tools

I am trying to implement a 3.3V/0.8V design for IMax 8A and 10A.  I have FETs from and existing design that I would like to leverage and simulate.  For example I would like to simulate with single instance of CSD16340Q3 for M1 and M2 however WEBENCH  only allows options for 2 CSD16340Q3 for the low side (M2) and then M1 is fixed to some other combination of single or dual fets.  Please advise.

  • Hi Ryan,

    We do not have the feature to pick the exact FET partnumber with its quantity for the M1/M2 sockets just yet. It is possible that the alternate FETs list has the CSD16340Q3 ranked lower than the dual qty solution and may be present in the alternate FETs list. It may not be present in the alternate FETs list if it ranks significantly lower ( not present in the first 125 solutions) Alternatively, it is possible that the single quantity FETs might not be feasible in this design with CSD16340Q3. We can find this out if you can share the exact design with us. You can use the share design public URL option to do so.

    Regards,

    Amod

  • Hi Ryan,

    Thanks for sharing the design link. For shared input condition, the mosfet "CSD16340Q3" should work with quantity one (for both high side and low side). But these fets rank lower on Webench due to comparatively high power loss, price and area. Due the limitation on number of alternate fets we show on Webench, you will not be able to find these fets in the list. 

    Regards,

    Bhushan