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TPA3128D2: How much current consumes TPS3128D2 in 12V PVCC?

Shen Zed
Prodigy 225 points
Part Number: TPA3128D2

HI, I am going to use 12V Voltage source for TPA3128D2.

I will use TPS3128D2 as mono.(Only one speaker is used)

I wonder how much current consumes when using TPS3128D2 for using one 30W  4ohm Speaker.

.

I think Power = Voltage * Current, so 30W Power = 12V * 2.5A. 

.

Is this right? If my 12V source has max 3A budget, will this sufficient to work? 

.

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And just one additional simple question,

Is the term "BTL mode" is same as the term "Mono mode" ? (not PBTL, just BTL)

  • 0
    TI__Mastermind 19010 points

    Hi Zed,

    The efficiency of the 30W on PBTL at 12V is 88%, so the PVCC input power is about 34W. So the input current is about 2.9A. I think 3A max supply is not suitable.

    For BTL mode, the efficiency of your application is 90%, the input current is about 2.8A. 

    Regards,

    Derek

  • 0 in reply to Yanming Gong
    Prodigy 225 points

    Thanks for kind reply Yanming.

    1. Then If i use 18V Voltage Source with 3A budget, will it suitable?

    2. To use BTL mode, setting is same as mono mode right? (I am going to use one speaker)

    I am sorry for simple questions, this is my first time to design audio amps. Please understand.

    Thanks.

  • 0 in reply to Shen Zed
    TI__Mastermind 19010 points

    Hi Zed,

    For 18V PVCC, 3A is suitable.

    If you use BTL mode and just one channel, you can use left or right channel, the other channel can be un-used.

    Mono setting in datasheet is PBTL mode setting.

    Regards,

    Derek