Overview
In today’s tutorial, we are going to make an “18W Stereo Hi-Fi Audio Amplifier” using TDA2030 IC.
The design comprises a 2x 18W Hi-Fi Stereo Power Amplifier utilizing two TDA2030 ICs. This configuration offers notable input sensitivity, minimal distortion, robust operational stability, and comprehensive protection against overload and output short circuits. It serves as an effective booster amplifier for augmenting existing small systems or for driving an additional pair of speakers alongside those already integrated into the system.
The board needs a symmetrical power supply of ±18Vdc/3A for optimal performance, accommodating loads of 8 or 4 Ohm. Adequate heat dissipation is crucial, necessitating a large heat sink for efficient operation. Refer to the diagram below depicting the left channel; replicate this circuit to create a stereo version comprising two separate circuits.
Stereo Hi-Fi Audio Amplifier
The term “Stereo” indicates that the amplifier processes and amplifies two separate audio channels (left and right) to create a spatial audio experience for the listener. “Hi-Fi” stands for high fidelity, which means the amplifier aims to reproduce the audio signal with high accuracy and minimal distortion, providing a faithful and high-quality sound output that closely resembles the original audio source.
Hardware Components
To make a stereo amplifier you’ll need the following hardware components to get started:
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1 | Integrated Circuit IC | IC = TDA2030 | 1 |
| 2 | Diodes | D1 = 1N4001 D2 = 1N4001 | 1 1 |
| 3 | Capacitors | C1 = 1uf-25V C2 = 22uF-25V C3 = 100nF-63V C4 = 100nF-63V C5 = 100uF-25V C6 = 100uF-25V C7 = 220nF-63V | 1 1 1 1 1 1 1 |
| 4 | Resistors | R1 = 22K R2 = 680R R3 = 22K R4 = 1R-1w | 1 1 1 1 |
Schematic
Technical Specifications:
- Supply voltage = ±18Vdc/3A symmetrical (see text)
- Current consumption = 3A maximum
- Input impedance = 500K Ohms
- Input sensitivity = 250 mV
- Signal-to-noise ratio = 80 dB
- Frequency response = 20 – 20,000 Hz ± 1 dB
- Distortion = 0.5 % maximum
- Load impedance = 4 – 8 ohm
Conclusion
This 18w stereo Hi-Fi Audio Amplifier Circuit is designed to accurately amplify and reproduce audio signals from stereo sources with high fidelity, delivering a high-quality listening experience with minimal distortion.
