Modern integrated class D UMZCH combine seemingly incompatible: high efficiency and low THD. This article describes the basic principles of Class-D amplifiers and describes the line chips UMZCH American firm MPS (Monolithic Power Systems). Recently, the power amplifier circuitry (UMZCH) have developed two contradictory directions: Improvement in the subjective quality of sound reproduction, usually by reducing the efficiency (COP) of the amplifier; Increased efficiency of the amplifier and reduce its size while maintaining high quality performance. The first direction is characterized by using the output stages UMZCH powerful field-effect transistors and vacuum tubes (Hi-End), often working in class A. The second direction is characteristic of wearable and automotive audio equipment. It is in realization of this direction are widely used amplifiers class D, and high-quality sound reproduction apparatus stationary class D is most commonly u...
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