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This paper presents micro-fabrication results and electrical performance measurements for chip-scale racetrack power inductors. Magnetic components with sputtered Co-Zr-O magnetic cores are demonstrated in a multi-megahertz dc-dc converter for solid-state lighting applications. The dc-dc converter achieves an 89% conversion efficiency at 5 MHz with an inductor power density of 1 W/mm2 of substrate...
In order to maximize efficiency for waveforms that contain low frequency and high frequency components, an inductor design using quasi-distributed gaps with thin and thick foil windings connected in parallel is presented. Compared to a single foil winding, this allows having more flexibility in design, improving packing factor, and pushing the upper frequency limit higher for a wide range of power...
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