Boost converter e.g. charging pump, and automatic dissipation control integrated pulse width modulation class-d audio amplifier for digital circuit, has digital-to-analog converter with input connected to output of integrator

摘要

The amplifier has digital circuits (7) provided with inputs connected to outputs (XP, XN) of comparators (5) and outputs connected to gates of output stage transistors (8-11). An XOR type digital port (13) includes inputs connected to the outputs of the comparators. A digital integrator (29) includes an input connected to an output (XDIFF) of the port, and performs a time-average of a digital signal (XINT) of the output of the port. A digital-to-analog converter (30) includes an input connected to an output of the integrator, and an output transmitted to a boost converter.