6W class A Audio Amplifier

When I have nothing to do, I like to listen to songs, so for long time I wanted to make my own audio amplifier that can drive two 4 ohm speakers(i.e. stereo). I wanted it to be compact so I was in search of suiatable IC that has stereo amplifier and able to be driven from PC sound o/p or mp3 player o/p. I ended with the IC known as TPA 1517 from Texas Instruments. This is a 6 W stereo audio amplifier IC and requires very less external components. It can be driven from power supply ranging from 9-18 v. The circuit diagram from the datasheet is as shown below.

For more information on the IC and its internal construction, download datasheet from here.

All you have to do is just join the circuit and enjoy the amplifier. I have made it and tested it with my two 4 ohm speakers. Its quality is quite good. It can be driven from the PC as well as mobile phone (with 3.5 mm jack output) and also from TV's audio out pins. One more thing is that use only regulated power supply otherwise it would produce a annoying background humming sound. I used my variable regulated power supply made using LM 317 IC. You can supply voltage to be between 9v to 18v. I used RCA female jack for both input and output. Although volume control is not shown in the circuit diagram you can add volume control just by adding two 10k potentiometers in two input channels as shown in figure below. Repeat this for the second channel.


This amplifier is quite easy to build and very compact. I have mounted it in a visiting card box with input and output female jacks taken out. To connect supply, I have used a 3 pin circuit board mounted header.

So what are you waiting for? Just make it and enjoy your favourite music.

If you have any doubts or problem making this thing or have anything to say to me then write a comment or mail me at dmehta17@gmail.com.