Many times we have been asked about an amplifier that can be powered with the computer source to amplify this. We have also seen the need for an amplifier that can be transportable everywhere and that provides an acceptable...Electronics Projects, 20W Stereo Amplifier With TDA2003 Tone Control "audio amplifier circuits, audio control circuits, ic amplifier, " Date 2019/08/04
Many times we have been asked about an amplifier that can be powered with the computer source to amplify this. We have also seen the need for an amplifier that can be transportable everywhere and that provides an acceptable power service. Thinking about filling these expectations, we present a 20W stereo amplifier (10W per channel) with 3-way tone control, included in the same printed circuit.
This amplifier uses the integrated circuit TDA2003 that has the same configuration and distribution of the pins of the TDA2002. The interesting thing about this integrated is that it uses very few external components, its assembly is very simple, low cost and uses little space. The TDA2003 provides an output current of up to 3.5 A, very low harmonic or cross-over distortion. It has protection against short circuit of DC and AC, thermal protection over the allowed range, dump of the load voltage peaks of up to 40V and accidental earth breaks. In conclusion it is a good option when it comes to an amplifier for the work table or the room. Ideal for beginners, although we must clarify that any circuit, however simple, sometimes has its drawbacks
TDA2003 Amplifier Schematic
4558 Tone Control Schematic
NOTE: The TDA2003 output integrals must be attached to an aluminum heatsink so that the heat emitted by them is dissipated. If you do not place the heatsink, screwing the integrated ones firmly into the heater, the amplifier will surely burn in a few minutes.
The part of tones is a little more complex but nothing because to be scared. The main component of the preamplifier with tone control is the C4558 integrated circuit. The original integrated is JRC4558 from the company New Japan Radio Co, but those who say only (C), leave good quality like other brands. The 4558 is a double low noise operational amplifier. It is one of the most used in professional audio for its excellent response and defined sound. Other replacements such as the TL072 can be used, but the sound is not the same, although it is also good.