Sepic-type voltage converter

摘要

A SEPIC-type voltage converter for converting an input voltage supplied by a power supply into an output voltage comprises an inductive component comprising primary and secondary windings, an output capacitor for delivering power to a load by way of an output node, an AC coupling capacitor, a first rectifier for rectifying the output voltage, and a switch for periodically switching between an ON state in which the primary winding is energized by the power supply and in which the secondary winding is energized by the coupling capacitor, and an OFF state in which the output capacitor is charged by both the primary winding and the secondary winding. A second rectifier is connected in series with the secondary winding and the secondary winding is inductively coupled to the primary winding such that the secondary winding is influenced by changes in the voltage applied across the primary winding by the power supply.

主权项

1. A single-ended primary-inductor converter (SEPIC)-type voltage converter for converting an input voltage supplied by a power supply into an output voltage, the SEPIC-type voltage converter comprising:
an inductive component comprising a primary winding and a secondary winding; an output capacitor arranged to deliver power to a load by way of an output node; an AC coupling capacitor; a first rectifier disposed between the AC coupling capacitor and an output node of the SEPIC-type voltage converter and arranged to rectify an output voltage of the SEPIC-type voltage converter; and a switch arranged to periodically switch between an ON state in which the primary winding is energised by the power supply and in which the secondary winding is energised by the AC coupling capacitor, and an OFF state in which the output capacitor is charged by both the primary winding and the secondary winding; wherein a second rectifier is connected in series with the secondary winding; and wherein the secondary winding is inductively coupled to the primary winding such that the secondary winding is influenced by changes in voltage applied across the primary winding by the power supply.