Overview
In today’s tutorial, we are going to make a “7-Watt Audio Power Amplifier Circuit” using TDA2003 IC.
This compact amplifier is built around the TDA2003 integrated circuit (IC), capable of delivering 4-watt RMS at 4 ohms. The TDA2003 offers enhanced performance while maintaining the same pin configuration as the TDA2002. It retains the additional features of the TDA2002, including a minimal requirement of external components, ease of assembly, space-saving design, and cost efficiency. The device boasts a high output current capability of up to 3.5 amperes, minimal harmonic distortion, and negligible crossover distortion.
Safe operation is assured through various protections, including safeguarding against DC and AC short circuits between all pins and ground, thermal over-range protection, resistance to load dump voltage surges of up to 40 volts, and protection against accidental open ground connections. It can be powered by a conventional direct current source.
Hardware Components
To make this circuit, you’ll need the following hardware components to get started:
| S no | Components | Value | Qty |
|---|---|---|---|
| 1 | Integrated Circuit IC | IC1 = TDA2003 | 1 |
| 2 | Polar Capacitors | C4 = 10uF-25V C5 = 470uF-25V C6 = 1000uF-35v C7 = 1000uF-35V | 1 1 1 1 |
| 3 | Non Polar Capacitors | C1 = 1822pF C2 = 100nF-63V C3 = 100nF-63v | 1 1 1 |
| 4 | Resistors | R1 = 470R R2 = 47R R3 = 100R R4 = 1R | 1 1 1 1 |
Schematic
Specifications:
- Music power output: 7W / 4ohm
- RMS output: 3.5W / 4ohm or 2W / 8ohm
- Total harmonic distortion: 0.05% (1W / 1kHz)
- Frequency response: 20Hz to 20kHz (-3dB)
- Signal/noise ratio: 86dB (A-weighted)
- Input sensitivity: 40mV / 150Kohm
- Overload and short-circuit-protected
- Supply voltage: 15V DC (8 to 18V DC possible) / 0.5A
Conclusion
This 7-Watt Audio Power Amplifier Circuit using the TDA2003 IC stands out as a versatile and efficient solution for audio amplification applications. With its ability to deliver 4 watts RMS at 4 ohms and a host of features such as improved performance, minimal external component requirements, ease of assembly, and robust safety measures, this amplifier circuit caters to both hobbyists and professionals alike
