Patent ID: 9054658
Filing Date: 2015-06-09
Classification: H02M,H03F

Abstract:
1. An apparatus for driving speakers, said apparatus comprising: amplifier cells, each of the cells being connected between a first and second power rail, the amplifier cells being user-configurable for driving selected speakers; a synchronous rectifier circuit for providing current on the power rails for consumption by all the amplifier cells, said current being dependent on a user-defined configuration of said amplifier cells relative to said speakers; and a control system for implementing a model of said synchronous rectifier circuit and said amplifier cells, said control system being configured to control an audio input signal in response to information concerning electrical outputs of the amplifier cells, thereby limiting current drawn from the synchronous rectifier circuit; wherein said model comprises a rectifier power dissipation model that provides an estimate of total power dissipated by said rectifier circuit as a function of the electrical outputs of the amplifier cells.