TPA3128D2: Efficiency of Audio Amplifiers

Ryu Yamashita

Expert 2080 points

Part Number: TPA3128D2
Other Parts Discussed in Thread: TPA3138D2, , TPA3131D2

Hi team,

I was evaluating the TPA3138D2 and was concerned about its low efficiency at low power.
So I am considering TPA3128D2 and TPA3131D2. Is there an efficiency curve for TPA3128D2 with details below 5W?
Also, is there an efficiency curve for the TPA3131D2 at 12V?
I would like to know if there are any other amplifiers you would recommend in terms of efficiency for 12V use.

Sincerely.
Ryu

over 1 year ago

+1 Shadow He over 1 year ago

TI__Mastermind 35000 points

Hi Ryu

If efficiency is our mainly concern, we would recommend to use TPA3128D2, it's frequency is higher than others. Please check below efficiency curve.

0 Ryu Yamashita over 1 year ago in reply to Shadow He

Expert 2080 points

Hi Shadow

Thanks for the reply.
Do you have any data on the efficiency curve with expanded power below 5W when the load is 4 ohms?
I have checked the efficiency curves on the datasheet but would like to know if you have detailed data.

Sincerely.
Ryu

+1 Shadow He over 1 year ago in reply to Ryu Yamashita

TI__Mastermind 35000 points

Hi Ryu

I checked the database, seems no data totally the same with your working condition.

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TPA3128D2: Efficiency of Audio Amplifiers