22 Watt Audio Amplifier

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The 22 watt amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers. The circuit is quite compact and uses only about 60 watts. The circuit is not mine, it came from Popular Electronics.

Schematic

This is the schematic of the 22 Watt Amp

Parts
Part
Total Qty.
Description
Substitutions
R1139K 1/4 Watt Resistor
C1,C2210uf 25V Electrolytic Capacitor
C31100uf 25V Electrolytic Capacitor
C4147uf 25V Electrolytic Capacitor
C510.1uf 25V Ceramic Capacitor
C612200uf 25V Electrolytic Capacitor
U11TDA1554 Two Channel Audio Amp Chip
MISC1Heatsink For U1, Binding Posts (For Output), RCA Jacks (For Input), Wire, Board

Notes

  1. The circuit works best with 4 ohm speakers, but 8 ohm units will do.

  2. The circuit dissipates roughly 28 watts of heat, so a good heatsink is necessary. The chip should run cool enough to touch with the proper heatsink installed.

  3. The circuit operates at 12 Volts at about 5 Amps at full volume. Lower volumes use less current, and therefore produce less heat.

  4. Printed circuit board is preferred, but universal solder or perf board will do. Keep lead length short.

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Comments

walencho
22 Watt Audio Amplifier
Monday, May 12, 2008 6:55:08 AM
When i built the circuit, it didn't work. To further compound issues, the 2200uF capacitor blew up. What could be wrong and what is the solution. Pls feel free to mail me. NB: My lecturer says the current is too BIG! Is he wrong?
LEHJ
22 Watt Audio Amplifier
Sunday, May 04, 2008 10:34:51 PM
DO YOU HAVE A SCHEMATIC OF 1000 WATTS AUDIO AMPLIFIER
LEHJ
22 Watt Audio Amplifier
Sunday, May 04, 2008 10:32:39 PM
Where is the pin code of TDA 1554 two channel audio amplifier
Christiaan
22 Watt Audio Amplifier
Wednesday, April 30, 2008 6:32:08 PM
Thanks for the great circuit. Works like a charm
benson
22 Watt Audio Amplifier
Tuesday, April 29, 2008 11:36:12 AM
thanks gays it is the easiest to set up and greate performance I've used it 4 6yrs now and no problems. just dont short the speaker terminals
Gad
22 Watt Audio Amplifier
Tuesday, April 29, 2008 5:47:32 AM
Please can you show me how to calculate the gain of the amplifer and other relevant calculations. Thank you
nguyen
22 Watt Audio Amplifier
Sunday, April 20, 2008 8:32:16 AM
thanks for yours circuit, it's very useful for me i used it for my project and it operate perfect
Kaushik
22 Watt Audio Amplifier
Sunday, April 13, 2008 10:43:36 AM
Just look at the comment by "anonymous". He asks if this can play MP3? You fool how dumb you are? Its not a DAC, nor does it contain any microprocessor to process MP3 Files. It just amplifies the incoming message signal. You have to connect it to any audio source (or any other source whose signal u want to amplify). K, leave it. People like you will not understand these things. And can't you see those 2 inputs and 2 output lines? why the fuck did u ask that? Even small child can guess that. If you want more speakers, add more op-amps in similar manner. Have some logical understanding.
anonymous
22 Watt Audio Amplifier
Sunday, April 13, 2008 9:14:53 AM
For volume use a dual gang 100k pot with the middle pins going to C1/2 (open side of caps not amp side), signal in going to the right hand pins and 0v to the left hand pins (ref pins facing downward).
RAHUL BADRIKE
22 Watt Audio Amplifier
Saturday, April 05, 2008 4:21:57 AM
IS THIS IC TDA 1554 AVAILABLE IN INDIA?
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