Power demultiplexer for high efficiency multi-channel led driver

Abstract

The invention relates to a power stage for powering a first load, the first load being couplable between a first output and a second output, the power stage comprising a first input for receiving a bus voltage, the first output coupled to the first input and arranged to be couplable to the first load, a first capacitor coupled between the second output and a first further node and couplable in series with the first load, a secondary power converter comprising a controller for controlling the secondary power converter, a first inductive element and a first switching element coupled in series between a second input and a return node, a second inductive element, inductively coupled to the first inductive element, and a first unidirectional device coupled in series between the second output and the first further node, wherein the secondary power converter is arranged to provide a current to the first capacitor that is of a reverse polarity of a current provided to the first capacitor via the first load.

Dependencies are inferred from the claim text.