This is 2x1W stereo amplifier circuit based on single IC KA2209. IC KA2209 is an equivalent IC to the TDA2822, you can use TDA2822 if you can’t find KA2209. It is ideal for battery powered operation since the supply required for this circuit is 2V to 9VDC. Power output depends critically on speaker resistance & supply voltage. At 3V into 4 ohm speakers the power is 0.1W. At 6V into 4 ohm speakers it is 0.65W. At 9V it is over 1W.
R1 R2_______10K R3 R4_______4R7 C1__________10uF mini C2, C3______470uF/16V C4, C5______100uF/25V C6, C7______100nF IC__________KA2209/TDA2822 IC socket___8 pin
The kit for this stereo audio amplifier circuit is available at elektronickits.com
Download 2x1W Stereo Amplifier with IC KA2209 circuit tutorial here:
The KA2209 is a monolithic integrated audio amplifier in a 8-Pin plastic Dual in line package.
- Wide operating supply voltage:Vcc=1.8V-9V
- Low crossover distortion
- Low quiescent circuit current
- bridge/stereo configuration
Download KA2209 datasheet here: