22W Audio Amplifier with TDA1554

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Here the 22W audio amplifier which is low cost and very easy to build. You can use this circuit as a booster in a car audio system, an amplifier for satellite speakers in a surround sound or home theater system, or as an amplifier for computer speakers

22W Audio Amplifier with TDA1554

Circuit Notes


  1. Use 4 ohm speakers for best performance, but 8 ohm units can be used too.
  2. The circuit dissipates roughly 28 watts of heat, so a good heatsink is necessary. The TDA1554 chip should keep cool enough to touch with the proper heatsink installed.
  3. The circuit works at 12 Volts at about 5 Amps at full volume. Lower volumes use less current, and therefore produce less heat on the TDA1554 chip.
  4. Construction on Printed circuit board (PCB) is preferred, but universal solder or perf board will do since the design is very simple. Keep lead length short.

Parts List:
R1 = 39K
C1,C2 = 10uf/25V
C3 = 100uf/25V
C4 = 47uf/25V
C5 = 100nF
C6 = 2200uf/25V
U1 = TDA1554

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