Audio amplifier power supply with inherent power factor correction

摘要

An audio amplifier is powered by a switch mode power supply optimized for audio applications. The power supply includes a rectifier circuit and a discontinuous mode multiphase isolated flyback power circuit and does not require a separate power factor correction stage. The discontinuous mode multiphase isolated flyback power circuit includes multiple isolated flyback converters operating synchronously to each convert a portion of the power and supply a phase-summed direct current voltage to the audio amplifier.

主权项

1. An audio amplifier power supply with inherent power factor correction, the audio amplifier power supply comprising:
(a) a rectifier circuit configured for rectifying an input voltage from an alternating current (AC) power source; and (b) a discontinuous mode multiphase isolated flyback power circuit configured for receiving the rectified input voltage from the rectifier circuit and supplying a phase-summed direct current (DC) voltage.