3087 - 1W + 1W Stereo Amplifier Module (TDA2822 equiv.)

This 1W stereo amplifier module uses the Samsung KA2209B IC (equivalent to the TDA28222) designed for portable cassette players and radios.

We use the standard data book circuit for this chip and have include a volume control pot. You can feed the input from a preamplifier like 3098 into this kit. Output speakers (not supplied) should be rated 1W minimum, 4 to 8 Ohms. No heat sink required.

Technical Specifications
Power Supply	3 – 12 V at 200 – 500 mA max
Idle Current	~ 10 mA
Output Power	> 1 Watt max. 4-8 ohms, 12V DC > 500 mW, 32 ohm, 12V > 500 mW, 4 ohm, 6V ~ 0.4 Watt RMS cont. per channel
Output impedance	4 - 32 Ohm
Freq. response	~ 40 Hz to 200 kHz, 8 ohm, G=10  < 20 Hz to > 50 kHz, 32 ohm
THD	< 1 % @ 750 mW, 4-8Ω, 12V < 0.2 % @ 250 mW, 4-8Ω, 12V
Gain	~ x10 (20 dB) OR x100 (40dB)
S/N ratio	> 80 dB, G = 20 dB > 60 dB, G = 40 dB
Sensitivity	< 300 mV, G = 20 dB < 30 mV, G = 40 dB
Input Z	~ 10 k ohm
Board Dimensions	40 x 50 x 25 mm
Board Connections	Solder pads
Product Formats	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual KA2209B IC Data Sheet