TPA3122 audio amp circuit schematic

TPA3122D2 Class D Audio Amplifier

tpa3122D2 IC TPA3122D2 IC is used as a class D audio amplifier and can deliver up to 15W of power at 10% distortions. The real advantage of using a class D amp, especially TPA3122 is the fact that this IC doesn’t need a heatsink because it has a high efficiency. Another great thing about it is that you can buy a $20 built-it-yourself kit or even cheaper from ebay but you need to be careful not to buy a fake one.

Schematic of the TPA3122 amp circuit

TPA3122 audio amp circuit schematic

I discovered this IC while searching for an audio amplifier circuit that I need for the 2 x 10W/4Ω speakers received from my brother-in-law. I think that TPA3122 can provide enough power for what I need even though it can output only 8W with 1% distortions on a 4Ω speaker (something that some of you might find too low). The main reason I would choose this instead of a class A or B IC is the fact it doesn’t need a heatsink, so the whole amplifier will be lighter in weight and cheaper.

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  • Mister Jay

    Hello! I’m trying to figure out how to use this in my bluetooth headset/speaker hybrid that I’m in the process of developing. Any chance you could help me out? Email is email.lucero(at)