US 12,142,407 B2
Inductor devices and stacked power supply topologies
Luca Peluso, Villach (AT); Gerald Deboy, Klagenfurt (AT); Matthias J. Kasper, Villach (AT); and Kennith K. Leong, Villach (AT)
Assigned to Infineon Technologies Austria AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Feb. 26, 2021, as Appl. No. 17/186,339.
Prior Publication US 2022/0276685 A1, Sep. 1, 2022
Int. Cl. H01F 17/06 (2006.01); H01F 17/04 (2006.01); H01F 21/12 (2006.01); H01F 27/24 (2006.01); H01F 17/00 (2006.01)
CPC H01F 21/12 (2013.01) [H01F 17/045 (2013.01); H01F 2017/008 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An inductor device comprising:
a core fabricated from magnetically permeable material, the core including an inner diameter and an outer diameter, the magnetically permeable material disposed between the inner diameter and the outer diameter;
an electrically conductive path disposed within the inner diameter of the core, an outer diameter of the electrically conductive path extending to the inner diameter of the core;
a magnetic permeability of the core varying in magnitude depending on a distance with respect to the electrically conductive path;
wherein the core includes multiple concentric layers of magnetically permeable material disposed about the electrically conductive path;
wherein the multiple concentric layers of magnetically permeable material include a first concentric layer of magnetically permeable material and a second concentric layer of magnetically permeable material;
wherein the first concentric layer of magnetically permeable material extends between the outer diameter of the electrically conductive path to an inner diameter of the second magnetically permeable material; and
wherein a portion of the second concentric layer of magnetically permeable material disposed near the inner diameter of the second concentric layer of magnetically permeable material is operative to support a first magnetic flux density, the first magnetic flux density being greater than 50 percent of a second magnetic flux density supported by a portion of the first concentric layer of magnetically permeable material disposed near an inner diameter of the first concentric layer of magnetically permeable material.