Charles Sullivan headshot

Charles R. Sullivan

Sue and John Ballard '55 TT'56 Professor of Engineering

Research Interests

Power electronics; electromagnetic design of power electronics components; micro-fabricated magnetic components; nanocomposite magnetic materials; energy efficiency and renewable energy


  • BS, Electrical Engineering, Princeton University 1987
  • PhD, Electrical Engineering and Computer Sciences, University of California Berkeley 1996


  • IEEE PELS Modeling and Control Technical Achievement Award, 2018
  • IEEE Fellow, 2014
  • Sigma Xi, 2001
  • IEEE Power Electronics Society Prize Paper Award, 2000
  • National Science Foundation CAREER award, 1999

Professional Activities

  • Institute of Electrical and Electronics Engineers (IEEE), member
  • Transactions on Power Electronics, Associate Editor
  • Power Electronics Society, Member at Large, Administrative Committee
  • Industry Applications Society, Awards Chair, Power Electronics Devices and Components Committee
  • Magnetics Society, Industrial Electronics Society


Resonant Link
Senior Scientist

Research Projects

  • Microfabricated magnetic components using nanomaterials

    Microfabricated magnetic components using nanomaterials

    Microfabricated magnetic components using nanomaterials make it possible to miniaturize power-handling magnetic components through taking advantage of the materials' high-flux-density and high-frequency capabilities. We are developing practical methods of depositing these materials and fabricating inductors and transformers on silicon chips or in other technologies.

  • Passive high-frequency power components

    Passive high-frequency power components

    Passive high-frequency power components are often the limiting factors in reducing the power loss, size, cost, and weight of high-frequency electronic power converters. Through detailed analysis, modeling, and optimization of high-frequency effects in inductors, transformers, and capacitors, we are improving performance of these components and making it easier to design the efficient, low-cost power electronics needed for a wide range of applications including energy efficiency and renewable energy.

Selected Publications

  • A. J. Stratakos, C.R. Sullivan, S.R. Sanders, and R.W. Brodersen. "High-Efficiency Low-Voltage DC-DC Conversion for portable applications," in Low-Voltage/Low-Power Integrated Circuits and Systems: Low-Voltage Mixed-Signal Circuits, Edgar Sanchez-Sinencio and Andreas Andreou, Eds. IEEE Press, 1999.
  • A. J. Stratakos, C.R. Sullivan, S.R. Sanders. "DC Power Supply Design in Portable Systems," in Low Power Digital CMOS Design, A.P. Chandrakasan and R.W. Brodersen, Kluwer Academic Publishers, Boston, 1995.


  • Low AC resistant foil winding for magnetic coils on gapped cores | 7,701,317
  • Method for making magnetic components with N-phase coupling, and related inductor structures | 7,498,920
  • Low impedance test fixture for impedance measurements | 7,365,550
  • Method and apparatus for multi-phase DC-DC converters using coupled inductors in discontinuous conduction mode | 7,317,305
  • Voltage converter with coupled inductive windings, and associated methods | 6,362,986
  • Circuit for dimming gas discharge lamps without introducing striations | 5,001,386


  • ENGG 173: Energy Utilization
  • ENGS 23: Distributed Systems and Fields
  • ENGS 125: Power Electronics and Electromechanical Energy Conversion


Dartmouth Ph.D. Innovation Program: Daniel Harburg


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Transforming Power
Aug 01, 2020
$30B for Small Biz
Mar 07, 2011