Multiphase Operation, Synchronous Rectification, and Interleaving of Resonant Converters

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Learning Objectives

The students will study advanced DC-DC converters for battery chargers application. The course will focus on the use of multiphase advanced resonant DC-DC converters. The objective is to analyze the operation of multiphase resonant converters to identify the control and modulation techniques. Furthermore, the integration of synchronous rectification will be investigated which provides higher efficiency compared to conventional diode rectification. The course will analyze and compare the possible modulation techniques to ensure proper and reliable operation of synchronous rectifiers.

Course Structure

  • 2 hour of lectures, discussion, and presentations per week.
  • Assigned reading.
  • Evaluation is based on student presentations (total of 6), 12 weekly summaries, and a final report, as well as the depth of understanding conveyed in the discussions and questions.

Course Topics

  1. Background: Power converter topologies: dc-dc (buck, boost, buck-boost), ac-dc (rectifier, power-factor corrector).
  2. Modeling and control techniques for resonant converters: fundamental harmonic approximation, extended describing function modeling, modulation and gate drivers for synchronous rectification switches, geometric control, phase-plane analysis, large signal averaging, and trajectory control.


[1] Various IEEE journal and conference papers.

[2] R. W. Erickson and D. Maksimovic, “Fundamental of Power Electronics”; Norwell, Mass.: Kluwer Academic, 2001.


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