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Tuning compensation component

shizunori
Prodigy 250 points

Other Parts Discussed in Thread: TPS54331

When I change output capacitor, SwitcherPro doesn't tune compensation components automatically.

Does SwitcherPro have this function?

If it doesn't, I must tune them manually using "what if analysis", right?

And are there any documents which are describing about the procedure of tuning compensation components?

Parts# is TPS54331.

 

  • TI__Intellectual 1280 points

    If you change the Output capacitor from the schematic then the software does go through the routine of selecting new compensations (this is also true if you change the inductor)

    In some cases this won't change the compensation much.  Also if you have the compensation components locked then they will not be updated. (this is useful if you are trying to model a design that's on already on a physical board)

    Now if you change inductor or output caps on the What if Analysis form then it will not automatically update compensation values.  This is a feature that we're investigating.  We'd also like to add a feature that will allow you to find L's and C's based on your what if Case.  So you don't have to go back to the schematic an adjust them manually. 

    compensating TPS54331 is a bit challenging.  We're working on a updated version of the tool that has an improved compensation selection for this part and related parts.  it's due out mid january.  We're using the venable "K factor" approach.  this can be done manually, with a little pain.  Check out the Venable technical paper 3 for details about this method

    http://hep.uchicago.edu/atlas/docs/lvpsdocs/Reference%20Material/tp-03.pdf