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.

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.



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