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Nonlinear Frequency-Dependent Model for Microinductors With Magnetic Core

TitleNonlinear Frequency-Dependent Model for Microinductors With Magnetic Core
Publication TypeJournal Article
Year of Publication2013
AuthorsGaskill, S., A. Papou, A. Mohan, W. French, and A. Weisshaar
JournalIEEE Electron Device Letters
Volume34
Issue2
Pagination304 - 306
Date Published02/2013
ISSN1558-0563
KeywordsDC–DC power conversion, eddy currents, equivalent circuit modeling, magnetic films, microinductor
Abstract

This letter presents a compact nonlinear and frequency-dependent equivalent circuit model for microinductors with thin-film magnetic cores. The model is suitable for many existing microinductor geometries. It captures magnetic saturation and eddy currents and electric field coupling in a physically meaningful manner and can be directly implemented in commonly used circuit simulators. The new model lends itself for simple extraction from standard biased small-signal impedance analyzer measurements. We demonstrate the performance of the proposed model for a representative measured NiFe inductor. The results of the extracted model are in good agreement with the measurements.

DOI10.1109/LED.2012.2235815
Short TitleIEEE Electron Device Lett.