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Author Kowase, I. ♦ Sato, T. ♦ Yamasawa, K. ♦ Miura, Y.
Sponsorship IEEE Magnetics Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1965
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Thick film inductors ♦ Ferrites ♦ Polyimides ♦ Thick films ♦ DC-DC power converters ♦ Magnetic cores ♦ Coils ♦ Inductance ♦ Low voltage ♦ Composite materials ♦ screenprinting ♦ Composite material ♦ dc–dc converter ♦ Mn–Zn ferrite ♦ planar inductor ♦ polyimide
Abstract A new planar inductor using a composite magnetic core for low voltage and large current dc-dc converter has been developed. The composite material consisted of a 40% volume fraction of Mn-Zn ferrite particle with a mean diameter of 10 /spl mu/m and polyimide matrix. The composite magnetic core exhibited a low relative permeability of 6. The fabricated planar inductor with a size of 15/spl times/15/spl times/1.4 mm consisted of an inner two-turn copper square spiral coil, a top 350-/spl mu/m-thick composite magnetic core and a bottom 1-mm-thick Ni-Zn ferrite substrate. The inductor had a dc coil resistance of 15 m/spl Omega/ and an inductance of 140 nH. The degradation of inductance was below 4% at a superimposed dc current of 10 A. A synchronous rectifier type buck converter with a switching frequency of 1 MHz, an input voltage of 5 V, and an output voltage of 1 V was constituted using a planar inductor, and exhibited a maximum conversion efficiency of 80% at 4 A.
Description Author affiliation :: Fac. of Eng., Shinshu Univ., Nagano, Japan
ISSN 00189464
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-10-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 41
Issue Number 10
Size (in Bytes) 342.31 kB
Page Count 3
Starting Page 3991
Ending Page 3993

Source: IEEE Xplore Digital Library