3V Battery Powered Stereo Amplifier Circuit TDA2822M

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.

PARTS LIST
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 has Low crossover distortion, Supply voltage down to 1.8V, Low quiescent current and Bridge or Stereo configuration. This IC can deliver a maximum power of 1000 milli-watts per channel, for a total of 2 watts.

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.

3V Battery Powered Stereo Amplifier Circuit TDA2822M Video

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