1W stereo Headphone Amp with TDA2822
A stereo power amp designed for use in portable players and radios. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel, and a 9V supply will provide 1W in 8 Ohm per channel for small loudspeakers.
Amplifier 30W
R1=1Kohm R16-17=270ohm D1=9.1V 0.4W zener R2=47Kohm R18=22ohm 1W D2-3=1N4148 R3=1.5Kohm R19=NC Q1-2=BC550C R4-5=10Kohm R20-21=0.39ohm 4W Q3=MPSA56 R6=5.6Kohm TR1=250ohm trimmer Q4=BC547B R7=10ohm C1=470nF 100V MKT Q5=BC212 R8=47Kohm C2=1nF 100V MKT Q6=BC183 R9=560ohm C3=68pF ceramic Q7-8=MPSAO6 R10-11=8.2Kohm C4-8=22nF 100V MKT Q9=TIP141 R12-15=120ohm C5-6-7=100nF 100V MKT Q10=TIP146 R13=680ohm C9=47uF 25V F1-2=1.6AT FUSE R14=330ohm C10-11=220uF 63V All the resistors [...]
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