Desenvolvimento e caracterização de um amplificador classe D de média potência

Abstract

The present work presents the creation and analysis of a class D amplifier, to carry out the amplification, the integrated circuit IRS2092 from IOR - Infineon Technologies was used, capable of managing, modulating and amplifying the signals, requiring only a good choice of power and monitoring components. it also requires a good selection of switching transistors and a suitable passive filter for demodulation. Thus, an amplifier capable of delivering a power of 40W in a resistive load with low harmonic distortion, less than 0.8%, was designed, being comparable to linear amplifiers, but with an efficiency greater than 90%, common value for class amplifiers D .In the work, the values of the components that fit in the test sequences are calculated. To arrive at the results, a synthesis of the functioning of each amplifier stage was made using commercially components, using an automatic oscillating modulation that has an excellent sound quality, besides making the circuit smaller within its cost. Finally, the amplifier was assembled to carry out the specifications and tests in order to validate the operation and practical specifications.