Patent ID: 8841984
Filing Date: 2014-09-23
Classification: H01F

Abstract:
1. A transformer, comprising: at least one host board comprising internal windings, the internal windings comprising copper, the internal windings comprising a primary winding and a secondary winding; and external windings, wherein the external windings comprise copper and are separate from and are connected externally, with respect to the host board, and in parallel to the secondary winding of the internal windings, wherein the external windings are heavier than the internal windings, wherein the external windings are disposed on a copper stamping or a heavy copper two layer printed circuit board, wherein metal layers on the heavy copper two layer printed circuit board or the copper stamping have a thickness greater than a thickness of metal layers on the host board, wherein the heavy copper two layer printed circuit board or the stamping are disposed in a plane parallel to the metal layers of the host board.