Assessment of microinductors for DC-DC converters

David Flynn, Hua Lu, Chris Bailey, Marc Desmulliez

Research output: Chapter in Book/Report/Conference proceedingConference contribution


There are increasing demands on the power density and efficiency of DC-DC power converters due to the soaring functionality and operational longevity required for today's electronic products. In addition, DC-DC converters are required to operate at new elevated frequencies in the MHz frequency regime. Typical ferrite cores, whose useable flux density falls drastically at these frequencies, have to be replaced and a method of producing compact component windings developed. In this study, two types of microinductors, pot-core and solenoid, for DC-DC converter applications have been analyzed for their performance in the MHz frequency range. The inductors were manufactured using an adapted UV-LIGA process and included electrodeposited nickel-iron and the commercial alloy Vitrovac 6025 as core materials. Using a vibrating sample magnetometer (VSM) and a Hewlett Packard 41 92A LFimpedance analyzer, the inductor characteristics such as power density, efficiency, inductance and Q-factor were recorded. Experimental, finite element and analytical results were used to assess the suitability of the magnetic materials and component geometries for low MHz operation. ©2006 IEEE.

Original languageEnglish
Title of host publication2006 International Conference on Electronic Materials and Packaging, EMAP
Publication statusPublished - 2006
Event2006 International Conference on Electronic Materials and Packaging - Kowloon, China
Duration: 11 Dec 200614 Dec 2006


Conference2006 International Conference on Electronic Materials and Packaging
Abbreviated titleEMAP


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