Design and Analysis of a 150W Audio Power Amplifier using IC 4122 with Comparative Performance Evaluation | IJCT Volume 12 – Issue 5 | IJCT-V12I5P56

This paper presents the design, simulation, and performance evaluation of a high-fidelity 150W stereo audio power amplifier using IC 4122. The design aims to achieve high efficiency, low distortion, and compact implementation suitable for modern consumer applications such as home theatre systems, Bluetooth speakers, and multimedia amplifiers. The amplifier operates in Class AB configuration with optimized biasing to minimize crossover distortion while maintaining thermal stability. Theoretical analysis, design equations, and experimental validation are discussed. Simulated results indicate a total harmonic distortion (THD) below 0.05% and efficiency above 82%. Comparative study with LM3886 and TDA7294 shows the superior efficiency and integration of IC 4122. The design integrates tone control, Bluetooth input, and noise suppression circuits, offering a low-cost yet high-performance audio solution suitable for academic and commercial applications.

This work presented the design and experimental validation of a 150W stereo audio power amplifier using IC 4122. The amplifier achieves high fidelity, low distortion, and compact implementation while maintaining thermal and operational stability. Comparative results show that IC 4122 outperforms LM3886 and TDA7294 in terms of power density and efficiency.

[1] V. Raj, S. Aravindan, A. Jayaprakash, H. M., M. R., and G. Bhuvaneshwaran, “Analysis of Different Audio Amplifiers,” IOSR Journal of Electronics and Communication Engineering, vol. 12, no. 1, pp. 32–36, 2017. [2] O. Bishop, ‘Design and Construction of High Quality 150W Power Amplifier,’ McGraw-Hill, 2009. [3] M. Berkhout, ‘200-W Class-D Audio Amplifier,’ IEEE Transactions on Circuits and Systems, July 2003. [4] H. Kaguono, ‘150W A/B Amplifier,’ Electronics World, vol. 112, no. 1849, pp. 47–48, 2007. [5] A. Agarwal and J. Lang, ‘Foundations of Analog and Digital Electronic Circuits,’ Morgan Kaufmann, 2005.

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