2 x 3W Stereo Audio Amplifier with IC BA5406

This is 2 x 3W stereo audio amplifier based on IC power BA5406. This circuit which will give you 3W power in each channel. This circuit will be great for indoor audio system.

2 x 3W Stereo Audio Amplifier with IC BA5406 circuit diagram

Components List:

R1, R2 = 120 ohm
R3, R4 = 2R2 ohm
C1, C2, C11, C12 = 220nF nonpolar capacitor
C3, C4, C5, C6, C7, C8 = 47uF/16V electrolytic capacitor
C9,  C10 = 470uF/16V electrolytic capacitor
IC = BA5406


The BA5406 contains two sets of AF power amplifiers. It delivers 5W x 2 into 3 ohm loads with a 12V supply. The BA5406 has good low-voltage characteristics, and the “pop” sound when power is applied is small. It generates little radio-band noise, minimal RF radiation.

Recommended supply voltage: 5-15V max. Typical 12V. Ideally the power supply should be able to deliver over 2.5Amps. This means that a typical “cheap” plugin power supply (wall wart) will not be good enough. The power supply leads should be as short as possible. Quiescent current 20-70mA, typically 40mA.

Download the manual of 2x3W Audio Amplifier with IC BA5406 in PDF version:

Download the BA5406 datasheet:

3W stereo amplifier kit


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