Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Study on Design of Magnetic Thin Film Inductors for DC-DC Converter Applications

DC-DC Converter용 자성박막 인덕터 설계에 관한 연구

  • 윤의중 (호서대학교 제어계측공학과) ;
  • 김좌연 (호서대학교 재료공학과) ;
  • 박노경 (호서대학교 정보통신공학과) ;
  • 김상기 (한국전자통신연구원 회로소자기술연구소 전력소자팀) ;
  • 김종대 (한국전자통신연구원 회로소자기술연구소 전력소자팀)
  • Published : 2001.01.01

Abstract

In this study, the optimum structure of a magnetic thin film inductor was designed for application of DC-DC converters. The Ni$\sub$81/Fe$\sub$19/ (at%) alloy was selected as a high-frequency($\geq$MHz) magnetic thin film magnetron sputtering system. As-deposited NiFe thin films show similar magnetic properties compared to bulk NiFe alloys, indicating that they have a good film quality. The optimum design of dolenoid-type magnetic thin film inductors was performed utilizing a Maxwell computer simulator (Ansoftt HFSS V7.0 for PC) and parameters obtained from the magnetic properties of magnetic core materials selected. The high-frequency characteristics of the inductance(L) and quality factor(Q) obtained for the designed inductors through simulation agreed well with those obtained by theoretical calculations, confirming that the simulated result is realistic. The optimum structure of high-performance (Q$\geq$60, L = 1${\mu}$H, efficiency $\geq$90%), high-frequency ($\geq$5MHz), and solenoid-type magnetic thin film inductors was designed successfully.

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References

  1. IEEE Trans. Magn. v.MAG-20 no.5 Planar Inductor K. Kawabe;H. Koyama;K. Shirae
  2. Dense DC-DC Converters Actively Share Stress D. Maliniak
  3. Proceedings IEEE v.76 no.4 High Frequency High-Density Converters for Distributed Power Supply Systerms J. G. Kassakian
  4. IEEE Trans. Magn. v.29 no.6 I.Sasada;T. Yamaguchi;K. Harada;Y. Notohara
  5. IEEE Trans. Magn. v.28 no.4 A New Planar Microtransformer for Use in Micro-Switching Converters M. Mino;T. Yachi;A. Tago;K. Yanagisawa;K. Sakakibara
  6. IEEE Trans. Magn. v.26 no.3 High-Frequency Operation of a Planar-Type Microtransformer and its Application to Multilayers Switching Regulators K. Yamasawa;K. Maruyama;I. Hirohama;P. P. Bringer
  7. IEEE Trans. Magn. v.15 no.6 Magnetic Thin Film Inductors for Intergrated Circuit Applications R. F. Soohoo
  8. J. Appl. Phys. v.37 no.12B Monolithic Fabrication of Electroplated Solenoid Inductors Using Three-Dimensional Photolithography of a Thick Photoresist J. B. Yoon;C. H. Han;E. S. Yoon;C. K. Kim
  9. IEEE Trans. on Industrial Electronics v.45 no.6 Micromachined Planar Inductors on Silicon Wafers for MEMS Applications C. H. Ahn;M. G. Allen
  10. Introduction to Magnetic Materials B. D. Cullity
  11. IEEE Trans. Magn. v.30 no.2 A Magnetic Thin Film Inductor and its Application to a MHz Switching dc-dc Converter T. Sato;H. Tomita;A. Sawabe;T. Inoue;T. Mizoguchi;M. Sahashi
  12. IEEE Trans. Magn. v.30 no.1 High Frequency Magnetic Properties of CoFe/SiO₂Multilayer Film with the Inverse Magnetostrictive Effect M. Senda;O. Ishii
  13. A Study of Volume vs. Frequency for Soft Switching Converters B. J. Masserant;E. W. Beans;T. A. Stuart