Patent ID: 9330833
Filing Date: 2016-05-03
CPC Classification: H01F,H02M,Y02B

Claim Text:
1. A power supply circuit comprising: a boost inductor configured to receive a rectified input signal; a diode coupled to the boost inductor; a bulk capacitor coupled to the diode, wherein the diode is configured to couple energy from the boost inductor to the bulk capacitor; and a switch coupled to the boost inductor; wherein the boost inductor has a parasitic capacitance less than about 100 pF; and wherein the boost inductor comprises a core having a first end and a second end, a wire coil wrapped around the core in a plurality of layers, and an insulation layer between first and second layers of the wire coil, and wherein the insulation layer comprises at least one layer of an insulating material having a relative permittivity greater than one that extends around the first layer of the wire coil and extends from a first end of the core to a second end of the core.