Audio amplifier using PAM8403

This is a basic circuit idea of making audio amplifier using PAM8403 chip. Note that this is readily available as a module. But if you need to try your hands on it or want to modify it following circuit may be handy.

Key Features

  • 3W Output at 10% THD  with a 4    Load and
  • 5V Power Supply
  • Efficiency up to 90%
  • Short Circuit Protection
  • Thermal Shutdown
  • Require very few  External Components  to Save the Space and Cost

Circuit Idea


Parts list required

  1. IC PAM8493
  2. Speakers 2 nos ( 4/8 ohm)
  3. C1 – 0.1 μf
  4. C2 and C3 – 220 nf
  5. C4, C5, C7 – 1 μf
  6. C6 – 470 μf
  7. R1 and R2 10k
  8. Volume control -100 k double pole.

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