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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
Pagination304 - 306
Date Published02/2013
KeywordsDC–DC power conversion, eddy currents, equivalent circuit modeling, magnetic films, microinductor

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.

Short TitleIEEE Electron Device Lett.