ISO specific Class D amp.

Marc Wolfe

Other Parts Discussed in Thread: TPA3251

I'm looking for a stereo class D amp with analog potentiometer volume control, capable of 200 watts per channel or more. Preferably one with a reference PCB design as I'm far from a professional PCB designer. I know class D amps are similar to motor drivers and there are motor drivers with analog controls, but I doubt they would work well as an audio amp.

over 7 years ago

0 Shawn Zheng over 7 years ago

TI__Mastermind 24835 points

Hi Marc,
We are looking into this and Adam will get back to you later

0 Adam Sidelsky over 7 years ago

TI__Guru 65510 points

Marc,

Our devices do not directly support potentiometer volume control but a potentiometer to GND can always be added to the op-amp stage before the amplifier.

How many channels are you needing at 200W or more?

Regards,

-Adam

0 Marc Wolfe over 7 years ago in reply to Adam Sidelsky

Prodigy 30 points

Just 2 channels.

0 Adam Sidelsky over 7 years ago in reply to Marc Wolfe

TI__Guru 65510 points

Marc,

Please take a look at our reference design:

www.ti.com/.../PMP11769

This has both a volume knob on the front end as well as the TPA3251 which supports the power level you are asking about.

TPA3251:

www.ti.com/.../tpa3251.pdf

Regards,

-Adam

0 Marc Wolfe over 7 years ago in reply to Adam Sidelsky

Prodigy 30 points

Thanks. I'll go with the TPA 3255. I should have mentioned I want 200 watts at WAY LESS than 10% THD.

Audio

Audio forum

ISO specific Class D amp.