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What's the best way to customize a Webench design? Right now it's very slow...

user4544767
Prodigy 240 points


I have a current design for a SMPS - I want to ut in my own values for components, but going through the TI /Flash interface takes >10s per component this makes the tool almost useless, especially as the design flow is very linear, so changes made, to say, the input voltage causes everything to be recalculated and I loose all my custom component values.

Am I doing something wrong, or is this just an interface limitation?

  • 0
    TI__Mastermind 39210 points
    Hi,

    Unless you are changing the specs completely for the design (Vin, Vout or Iout), WEBENCH should not calculate other components in the design. You can edit individual components by clicking on the component and selecting "Alternate parts". This will only change that part and nothing else.

    If for a particular design, you want to test it at different Vin or Iout values, then you can go to he OpVal tab or the sim tab and check out the operating conditions at those Vin and Iout values on this page. This will not change any component in the design, it will just tell you how the circuit will function under those conditions.

    Also, if you are new to WEBENCH, we have a short video training series which might be useful.

    training.ti.com/webench®-power-designer-training-series

    Does that help answer your question?
  • 0 in reply to Nikhil Gupta (Product Folder Models)
    Prodigy 240 points
    Nevertheless selecting "alternate" components is a slow slow process - it takes at *least* 10s per component, usually more like 20s. One is due to the poor UI (select target range has upper bound row above lower bound - it's more logical (for me) to think: range: min, to max))

    Then when the component is select, it recalculates the operating point - *every time*, then it has to ask me if I want to recalculate the compensation values (no, every time)... it's just a very slow, arduous process to do anything in webench, apart from simulate a Eval board design without any modifications. Or am I missing something?


    In this case, can you also confirm that to change the input voltage range will require a "redesign" (loosing custom components)?
  • 0 in reply to user4544767
    TI__Mastermind 39210 points
    Hi,

    Thanks for the feedback. We will take that into consideration for future improvements.

    To answer your last question, yes, changing the Vin range in the design will recalculate the components for you as the old components may no longer be valid for your new Vin specs.