A peak capacitor current pulse-train controlled buck converter with fast transient response and a wide load range

Jin Sha, Duo Xu, Yiming Chen, Jianping Xu, Barry W. Williams

Research output: Contribution to journalArticle

27 Citations (Scopus)
150 Downloads (Pure)

Abstract

It is known that ripple-based control of a switching dc-dc converter benefits from a faster transient response than a conventional PWM control switching dc-dc converter. However, ripple-based control switching dc-dc converters may suffer from fast-scale oscillation. In order to achieve fast transient response and ensure stable operation of a switching dc-dc converter over a wide load range, based on a conventional pulse train control technique, a peak capacitor current pulse train (PCC-PT) control technique is proposed in this paper. With a buck converter as an example, the operating modes, steady-state performance and transient respond performance of a PCC-PT controlled buck converter are presented and assessed. To eliminate fast-scale oscillation, circuit and control parameter design consideration are given. An accurate discrete iteration model of a PCC-PT controlled buck converter is established, based on which, the effects of circuit parameters on stability of converter operating in a DCM mode, mixed DCM-CCM mode, and CCM mode are studied. Simulation and experimental results are presented to verify the analysis results.
Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Early online date26 Oct 2015
DOIs
Publication statusE-pub ahead of print - 26 Oct 2015

Keywords

  • capacitor current feedback
  • pulse train control
  • switching DC-DC converter
  • wide load range

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