DocumentCode :
849776
Title :
Thin surface mounting type inductor and its application (high-performance inductor)
Author :
Nakao, Fumiaki ; Yamada, K. ; Kitaoka, M. ; Matsuo, Y. ; Sakamoto, H.
Author_Institution :
Electron. Device Lab., FDK Corp., Kosai, Japan
Volume :
38
Issue :
5
fYear :
2002
fDate :
9/1/2002 12:00:00 AM
Firstpage :
3332
Lastpage :
3334
Abstract :
In recent years there have been increasing demands for the power supplies of microprocessors to supply a high current at a low voltage while maintaining a favorable load response performance. This in turn requires inductors for use as dc-dc converters to have low winding resistance and low inductance. Consequently, these inductors now incorporate many vertical-structure parts due to low production costs. Assuming further miniaturization of electronic equipment and components, however, vertical parts are likely to be adversely affected by the expanding magnetic field that interlinks with the winding region. We performed magnetic field analysis on a new method of decreasing the interlinking magnetic fluxes in the winding region by improving the core structure and winding technique. It was found that, by providing a number of windings on a laterally structured core and by connecting them cumulatively, the magnetic fields induced in the gap areas could be removed from the winding region. This inductor proved to yield an outstanding low-loss performance when used as a dc-dc converter for high-frequency operation.
Keywords :
DC-DC power convertors; power inductors; power supplies to apparatus; switched mode power supplies; transformer cores; voltage regulators; core structure; dc-dc converters; electronic components; electronic equipment; expanding magnetic field; gap areas; high current; high-frequency operation; high-performance inductor; interlinking magnetic fluxes; laterally structured core; load response performance; low inductance; low production costs; low voltage; low winding resistance; low-loss performance; magnetic field analysis; magnetic fields; microprocessors; miniaturization; power supplies; thin surface mounting type inductor; vertical parts; vertical-structure parts; voltage regulator module; winding region; winding technique; Current supplies; DC-DC power converters; Inductance; Inductors; Low voltage; Magnetic cores; Magnetic fields; Microprocessors; Power supplies; Production;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2002.803122
Filename :
1042543
Link To Document :
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