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TAS5731: Question about PVDD

Austin Do
Intellectual 1895 points
Part Number: TAS5731

Hello team,

I have questions about PVDD with SE mode. Can you please answer the questions below?

1. Can I remove C40 and C41? If not, what is the available range of capacitance? 

2. The customer will not use PVDD_CD, so can you let me know how to terminate PVDD_CD and PGND_CD? Can I leave these NC?

Best Regards,

Austin

  • +1
    TI__Genius 11300 points

    Hi Austin

    this is Jesse in MAP team.

    1. Can I remove C40 and C41? If not, what is the available range of capacitance? 

    No, if you remove them, the noise come from power will affect the output THD.

    it is hard to say the range, according to our experience, 330uf, 470uf also should be ok.

    if you want more information about the capacitor, you can refer this document.https://www.ti.com/lit/an/slyt199/slyt199.pdf

    2. The customer will not use PVDD_CD, so can you let me know how to terminate PVDD_CD and PGND_CD? Can I leave these NC?

    yes, if you don't use them, you can leave them NC.

    but BST capacitor should be kept.

    thanks.

    Jesse