US 12,431,281 B2
Quasi-planar transformer construction
Vijay G Phadke, San Jose, CA (US); Prudhvi Mohan Maddineni, Santa Clara, CA (US); and Balal Khan, Guilford, CT (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on May 16, 2022, as Appl. No. 17/663,538.
Prior Publication US 2023/0368963 A1, Nov. 16, 2023
Int. Cl. H01F 27/28 (2006.01); H01F 27/24 (2006.01); H05K 1/11 (2006.01); H05K 1/18 (2006.01)
CPC H01F 27/2823 (2013.01) [H01F 27/24 (2013.01); H01F 27/2804 (2013.01); H05K 1/115 (2013.01); H05K 1/18 (2013.01); H05K 2201/1003 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A quasi-planar transformer comprising:
a first winding comprising one or more turns of wire;
a second winding comprising one or more turns of a conductive trace disposed on a printed circuit board;
a magnetic core positioned with respect to the first and second windings so as to provide a magnetic flux path coupling the first and second windings, wherein the magnetic core comprises an E-core and an I-core secured to the E-core, with the first and second windings disposed within a winding window defined by the E-core and the I-core; and
a notch in a center leg of the E-core, wherein the printed circuit board includes a tab that fits within the notch and wherein one or more vias connecting one or more layers of the printed circuit board are disposed within the tab.