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TPS65130 Design Spreadsheet

Padraic
Expert 7730 points
Other Parts Discussed in Thread: TPS65130

Could you find out for me if there is a design spreadsheet available for the TPS65130? I would like to play with some compensation values and get a feel for expected efficiencies. In particular I want to explore the potential impact of using a higher value inductor than recommended in the datasheet or having inductive filters downstream in order to minimize the ripple/noise getting to my sensitive circuitry.

  • 0
    TI__Guru 65390 points
    Hello Padraic,
     
    Sorry, there is no spreadsheet for this part. The part is partly internal compensated, therefore the impact of the external compensation components is limited.
    In general I would not recommend to have an additional filter in the FB loop, most probable this will make the power supply instable. Adding a filter behind the point where the FB divider is connected and after the output capacitors is normally not a problem.
    For the use of a higher indcutor value, I would recommend to take the EVM and test it with a load transient according this appnote: http://www.ti.com/litv/pdf/slva381
     
    In general TPS65130 does not need a feedforward network and just needs a capacitor on the CP and CN pins. I would start to test the power supply with just this basic setup and just add resistors in the compensation network or a feedforward network on the feedback divider if needed.
     
    Best regards,
    Brigitte