PLANE TRANSFORMER WITH INTEGRATED INDUCTANCE AND CONVERTER CONTAINING SUCH A TRANSFORMER

Abstract

The transformer (110) comprises: a multilayer printed circuit board (202); windings each having at least one turn (BT1); at least one inductor; a magnetic core comprising: main legs (J1-3), the turns (BT1) being wound around a first (J3) leg so that the windings are magnetically coupled in each other, the turn of the inductor being wound around a second (J1, J2) leg and auxiliary legs (J'1-4) for magnetic flux return so that the multilayer printed circuit board has a portion inside the auxiliary legs (J'1-4). The multilayer printed circuit board passes from the inner part through a first opening (EA1, EA2) existing between two auxiliary legs to present a first outer part (PA1, PA2) to the auxiliary legs, the turn (BT1) of a first of the windings extending into the first outer part of the multilayer printed circuit board.Figure for the abridged version: Fig. 4.