Digital Average Current Predictive Control for Multiphase Interleaved DC-DC Converters

Guihua Mao, Guohua Zhou*, Hongbo Zhao, Yuan Gao, Pawel Piotr Kubulus, Stig Munk-Nielsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

1 Citation (Scopus)

Abstract

Multiphase interleaved DC-DC converters are widely used in power electronics. However, conventional phase-shedding controls for improving efficiency at light load result in uneven thermal stress among phases. In this brief, the digital average current (DAC) predictive control with load current compensation for multiphase interleaved DC-DC converters is investigated. Taking a three-phase interleaved buck converter as an example, the working principle and load transient performance are analyzed. And a rotating phase- shedding strategy is proposed to distribute switching activities concentrated on a few phases at light load to all phases with the fastest shedding speed and minimized output oscillation. The effectiveness of the proposed method is verified experimentally.

Original languageEnglish
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume70
Issue number12
Pages (from-to)4519-4523
Number of pages5
ISSN1549-7747
DOIs
Publication statusPublished - 1 Dec 2023

Bibliographical note

Publisher Copyright:
© 2004-2012 IEEE.

Keywords

  • Digital average current control
  • load transient
  • multiphase interleaved DC-DC converter
  • phase-shedding

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