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5W Stereo Audio Amplifier
author: Rajkumar Sharma

This project is a 5W Stereo Audio amplifier based on BA5406.


5W Stereo Audio Amplifier project based on BA5406 IC which is  suitable for application like stereo radio cassette player, stereo components systems etc.  

The Heart of the project, BA5406 is a dual OTL monolithic power IC with two built-in, high output speaker amplifier circuits. High output of 5W×2 can be produced when VCC=12 V and RL=3Ω, and 2.8 W×2 when VCC=9V and RL=3Ω. The BA5406, which uses a high allowable power dissipation package, has a simple heat-sink design.


Good low voltage characteristics (Operation from Vcc=5 V)
Ripple filter (6pin) also can be used as muting pin (Make 6pin GND potential)
Small thermal resistance package and simple heat-sink design  
Power supply 5 to 12 VDC
Output - 5 W + 5W, 3 Ω
Input resistance - 100 KΩ
Good distortion (THD - 0.3%), Good channel balance
Berg pins for connecting of inputs
Power Battery Terminal (PBT) for easy power supply and speakers connection
Power-On LED indicator
Gain 46dB
Total Harmonic Distortion 0.4% ( Pout=0.5W Frequency=1Khz)
Heat-sink for IC Four mounting holes of 3.2 mm each with nut and stud
PCB dimensions 45 mm x 73 mm


download schematic in PDF


Parts List

PCB Design

PCB bottom layer






120x90 spot



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