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.
|R3, R4||10kΩ stereo potentiometer|
|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%)
|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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