Microfabricated inductors for 20 MHz dc-dc converters

T. O'Donnell, N. Wang, R. Meere, F. Rhen, S. Roy, D. O'Sullivan, C. O'Mathuna

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents the design and measured results for micro-fabricated inductors suitable for use in high frequency (> 10 MHz), low power (1 -2 W) dc-dc converters. The design has focused on maximizing inductor efficiency for a given converter specification. Inductors in the range of 100 nH to 300 nH have been fabricated and tested. The small signal measurements show a relatively flat inductance profile, with a 10% drop in inductance at 30 MHz. Inductance vs. dc bias current measurements show less than 15% decrease in inductance at 500 mA current. The performance of the micro-inductors have also been compared to a conventional wire-wound inductor in a 20 MHz dc-dc converter. The converter efficiency is shown to be approximately 4% lower when the micro-inductor is used compared to the when the wire-wound inductor is used. The peak efficiency of the micro-inductor in the converter is estimated to be approximately 93%.

Original languageEnglish
Title of host publication2008 23rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC
Pages689-693
Number of pages5
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event2008 23rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC - Austin, TX, United States
Duration: 24 Feb 200828 Feb 2008

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference2008 23rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC
Country/TerritoryUnited States
CityAustin, TX
Period24/02/0828/02/08

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