100W Power Amplifier Based IC TDA7294 Circuit Diagram

100W Power Amplifier Based IC TDA7294 Circuit Diagram

100W Power Amplifier

The most interesting circuit design to assemble. The printed circuit board has a 4-in-1 amplifier module. 100W power amplifier using TDA7294 and using IC LM3914 for VU meter. The Tone Control preamp uses the well-known IC4558. A balanced power module is included in the PCB. visit circuits99.com

100W Power Amplifier Based IC TDA7294 Circuits diagram

TDA7294 100W Power Amplifier Circuit Diagram

Components Required for TDA7294 100W Power Amplifier

Active Components

  • IC TDA 7294: 1
  • IC 7812: 1
  • IC LM3914: 1
  • Diode Zener 12V: 2
  • IC 4558: 1
  • Diode 1N4148: 1
  • Rectifier Bridge Diode 6 A: 1
  • LED: 11

Resistors

  • 390 Ω – 1/4w: 1
  • 680 Ω – 1/4w: 1
  • 1K Ohm – 1/4w: 2
  • 2k2 Ohm – 1/4w : 3
  • 2k7 Ohm – 1/4w: 1
  • 3k3 Ohm – 1/4w: 1
  • 5k6 Ohm – 1/4w: 1
  • 8k2 Ohm – 1/4w: 1
  • 10K Ohm – 1/4w: 4
  • 20K Ohm – 1/4w: 2
  • 22K Ohm – 1/4w : 3
  • 30K Ohm – 1/4w: 1
  • 47k Ohm – 1/4w: 1
  • 10R ohm – 1/4w: 1
  • 56R Ohm – 2w: 1
  • 2K2 Ohm – 2w: 2
  • Potentiometer 50K Ohm : 3

Capacitors

  • 100pF nonpolar capacitor disc / ceramic : 2
  • 6n8F nonpolar polyester capacitor: 2
  • 10nF nonpolar polyester capacitor: 2
  • 100nF nonpolar polyester capacitor: 6
  • 220nF nonpolar polyester capacitor: 1
  • 2.2uF/63V electrolytic capacitor: 1
  • 10uF/63V electrolytic capacitor: 5
  • 22uF/63v electrolytic capacitor: 2
  • 100uF/63V electrolytic capacitor: 2
  • 4700uF/63V electrolytic capacitor: 2

This is a mono channel audio system. For the stereo audio system, you need two similar circuits and make some changes such as use higher transformer current, higher diode current, higher capacitor value for the power supply module. Use only one power supply. Use stereo potentiometer and connect to the two boards using cables.

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