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Power Supply for the C6713

Bendous
Intellectual 340 points

Hello all,

 

I am designing a PCB around the C6713 DSP. I am looking at the power supply and it seems I need to supply two different levels DVdd (I/O) and CVdd (Core), which should ideally be 3.3 and 1.2V, respectively. Reading through the document: "Embedded Processing Guide", they suggest the use of a very complicated power supply utilising two TPS54350PWP ICs.

Is this necessary??? Could I design my own supply using a simple TRACO DC/DC converter, a couple of regulators, and decoupling capacitors??

They also insist 60 decoupling caps must be used for the 30 CVdd  and 30 DVdd pins on the DSP!!! Do I have to do all of that?? It seems like a serious overkill to me.

 

Any help would be very much appreciated.

 

Thanks all.

  • 0
    Prodigy 10 points

    Hi

    I used mic4680 for c6713 and it worked well.

    Inho

  • 0 in reply to In Ho Shin
    Intellectual 340 points

    Thanks for the reply Inho.

    Just one stupid question, did u use two of them for the 3.3V and 1.2V??

  • 0 in reply to Bendous
    TI__Guru 62975 points

    Bendous,

    You can use any power supply implementation you wish.  The power management reference designs are provided for those who wish to use a pre-canned solution.

    As far as the cap-count goes, it is a rule-of-thumb recommendation to use one cap per power pin.  Given that capacitor type and placement have a far greater impact on noise filtering than just raw quantity, it is likely that an experienced PCB designer can get away with fewer caps.  Just keep in mind that TI cannot support issues when there are deviations from the datasheet.

    -Tommy