Patent ID: 7859382
Filing Date: 2010-12-28
Classification: H01F

Abstract:
1. A planar transformer, comprising: a primary transformer winding having a first quantity of coiled electrically conductive traces formed in a nonconductive substrate that defines a first generally planar circuit board, wherein the first generally planar circuit board is elongate and includes a major and a minor axis; a second transformer winding having a second different quantity of coiled electrically conductive traces formed in a nonconductive substrate that defines a second generally planar circuit board, wherein the second generally planar circuit board is elongate and includes a major and a minor axis; an auxiliary transformer winding having coiled electrically conductive traces formed in a nonconductive substrate that defines a third generally planar circuit board, wherein the third generally planar circuit board is elongate and includes a major and a minor axis; means for magnetically coupling the primary transformer winding and the second transformer winding and the auxiliary transformer winding, wherein the first, second and third generally planar circuit boards are received onto a transformer core in a configuration aligning the respective major axes; a first set of connector ends electrically connected to the primary transformer winding, wherein the first set of connector ends extends from one end of the aligned major axes; a second set of connector ends electrically connected to the second transformer winding, wherein the second set of connector ends extends from a distal end of the aligned major axes, a third set of connector ends electrically connected to the auxiliary transformer windings, wherein the third set connector ends extends from one side of the aligned minor axes,