12V Delta-Sigma Class-D Audio Amplifier
Chapter
Abstract
Among the various existing medium- and low-power system applications, where a full high-voltage integrated circuit solution can be used, there is a limit beyond which the SVX technique loses its advantages with respect to dedicated technologies. The class-D audio amplifier presented in this chapter is a typical medium power application suited for this purpose. In addition to the power limit considerations, this chapter points Out the flexibility of this approach in combining low-voltage signal processing and high-voltage features. In fact, the low-voltage part of the amplifier consists of a delta-sigma (Δ-Σ) modulator and some protection features,.such as over-temperature and over-current detection cells.
Keywords
Switching Frequency Total Harmonie Distortion Noise Floor Power Device Input Amplitude
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