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TPA3140D2: Validity of efficiency

na na78
Guru 16770 points
Part Number: TPA3140D2

Hi

We want to verify the validity of efficiency that we obtained.

How to estimate the dissipation of TPA3140D2 itself?

BestRegards

  • 0
    TI__Mastermind 25895 points
    Hi,

    Shawn can help you out with estimating the efficiency of the device. He should be posting shortly.

    Regards,

    Alex
  • 0
    TI__Mastermind 24835 points

    Hi na na,

    In efficiency measurement, you need to measure Pt(the total power consumption), Po(the output power on the load) and Pe(power loss on cables/inductors...). Then calculate the efficiency by (Po+Pe)/Pt. And the power consumption on the devie itself should be Pt-Po-Pe.

    Please note that this is a very sensitive mesasurement. The load resistance for each channel need to be measured by multimeter in Four-Wire(Kelvin) mode. And the cable resistance and inductor DCR can't be ingored. 

    Best regards,

    Shawn Zheng