3V Battery Powered Stereo Amplifier Circuit TDA2822M

7805 5V 1A Regulated Power Supply with Overvoltage Protection Circuit

DIY simple low voltage dual power amplifier circuit TDA2822M

This is a simple low voltage stereo power amplifier circuit using single 8 pins IC. You can easily operate it using two battery cell. TDA2822M IC work within 1.8V to 15V. This can use for many applications like small battery powered radio, alarm, portable cassette player, headphone amplifier and more.3V Battery Powered Stereo  Amplifier Circuit TDA2822M

R1 4.7Ω 1/4W
R2 4.7Ω 1/4W
R3, R4 10kΩ stereo potentiometer
C1 470µF 16V
C2 470µF 16V
 C3 100µF 16V
C4 100µF 16V
C5 0.1µF
C6 0.1µF
C7 1µF 16V
C8 1µF 16V
C9 100µF 25V
IC1 TDA2822M
LS1 1W 4Ωspeaker
LS2 1W 4Ω speaker


TDA2822M is a monolithic integrated circuit in 8 lead Minidip package.

TDA2822M 3v stereo amplifier pin configuration

TDA2822M has Low crossover distortion, Supply voltage down to 1.8V, Low quiescent current and Bridge or Stereo configuration.

Speaker Output Power (each channel)
(f = 1kHz, d = 10%)
4Ω 3V 110mW
4Ω 4.5V 320mW
4Ω 6V 650mW
8Ω 6V 380mW
8Ω 9V 1000mw (1W)

R1, C6 and R2, C5 are resistor capacitor branch. They are connect between speaker out and ground to preventing oscillation and improving high frequency stability. C9 capacitor use for power supply filter.

This stereo power amplifier is very simple. because you can easily assemble it using vero board. Also TDA2822M amplifier can made very small and low cost. Additionally I use 3.5mm audio port for connecting portable device.

Battery Powered Amplifier TDA2822M DIY 3V Stereo Headphone Amplifier TDA2822M dual low voltage audio amplifier

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