Circuit Description

The following circuit diagram represents 3 W stereo amplifier. This circuit is based on the IC MAX 7910. This particular IC has some added features like thermal overload protection. This amplifier IC is a stereo amplifier IC. This IC has another important advantage that it can operate from a single 4.5 to 5.5 V power supply. This feature makes it ideal for its application in hand held devices.

This amplifier circuit is suitable for small power audio devices such as radio sets and portable CD players. 5 V DC power supply is used for powering the circuit. 6V battery with an IN 4007 diode series to the positive terminal of it can also be used instead of 5 V DC supply. The circuit will get a supply voltage approximately 5 V after 0.7 V voltage drop across diode.

Circuit Diagram

Simple 3 Watt stereo amplifier circuit

Simple 3 Watt stereo amplifier circuit


  • Use a good quality PCB or common board to assemble this circuit.
  • The circuit is designed strictly as per the datasheet and found to be working properly.
  • The MAX 9710  stereo audio power amplifier IC is can deliver  3Watts  of output to 4 Ohm loads