PLANAR TRANSFORMER OF A RESONANCE DC/DC CONVERTER, AND CORRESPONDING CONVERTER

摘要

The planar transformer according to the invention (14) is of the type of those comprising a magnetic circuit (15) exhibiting a predetermined number at least equal to four of lateral branches (16) each linked at each end to a central branch (21) by a first and a second magnetic bridge (28, 29), at least one primary winding (18) and at least one secondary winding (19, 20) which is arranged around each of the lateral branches. In accordance with the invention, the primary winding is arranged around the central branch. According to a particular characteristic, a plurality of air gaps (22, 23) are disposed in the lateral branches and/or the central branch as a function of a predetermined primary inductance. According to another particular characteristic, the primary winding is a flat coil extending substantially perpendicularly to the central branch.