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TAS5611A current consumption

Manjula Ellepola
Expert 1335 points

Other Parts Discussed in Thread: TAS5611A

Hi,

I am trying to calculate the current consumption from the 12V rail by the TAS5611A. From the data sheet I seem to calculate a total of 100mA. Is this correct. I need to be sure as I have to do a secondary power supply design to support the 12V rail for this amp and I am doing a 200mA switcher. Also is there any inrush currents that I need to be aware of?

Thanks for your help in advance..

Rgds

Manjula

DSPComm

  • 0
    TI__Mastermind 37045 points

    Hi Manjula,

    I would recommened having local decoupling caps at each of the GVDD_X and a 10uF cap close to the device for all the GVDD_X. The 10uF cap should take care of the in-rush current. Please refer to the EVM user's guide for the schematic and layout.

    http://www.ti.com/product/tas5611a

     

    reg,

    Paul Chen

    Audio Applications Engineer

    Dallas TX USA.

  • 0 in reply to user5276421
    Expert 1335 points

    Hi Paul

    Thank you for the helpful hints regarding the decoupling capacitors. However this did not quite answer my question which could have been confusing. What I am really after is the average current demand of the chip from the 12V power rail. From the data sheet I calculate it as 100mA max (taking into account the various demands from the half bridge circuits etc). Can you please verify to me that if I design a step down power supply for 200mA max load current that this would be adequate to supply the TAS5611A?

    Thanks for your help

    Manjula