Secondary side hybrid converter apparatus and method

摘要

An apparatus comprises an isolated power converter coupled to an input dc power source, wherein the isolated power converter comprises a primary switching network operating at a fixed switching frequency, a secondary resonant tank including a dc blocking capacitor and a rectifier having two input terminals coupled to the secondary resonant tank, an output capacitor coupled between a first output terminal of the rectifier and a load and a dc/dc converter coupled between a second output terminal of the rectifier and the load.

主权项

1. An apparatus comprising:
an isolated power converter coupled to an input dc power source, wherein the isolated power converter comprises:
a primary switching network operating at a fixed switching frequency;a secondary resonant tank including a dc blocking capacitor; anda rectifier having two input terminals coupled to the secondary resonant tank, wherein the rectifier comprises two legs, and wherein a first leg comprises two switching elements connected in series and a second leg comprises two elements connected in series, and wherein a common node of the two switching elements is connected to a first input terminal of the rectifier and a common node of the two elements of the second leg is connected to a second input terminal of the rectifier; an output capacitor coupled between a first output terminal of the rectifier and a load; and a dc/dc converter coupled between a second output terminal of the rectifier and the load, wherein the dc/dc converter has an input directly connected to the first leg and an output directly connected to the second leg.