Modified hysteretic current control (MHCC) for improving transient response of boost converter

Jen Chieh Tsai*, Chi Lin Chen, Yu Huei Lee, Hong Yuan Yang, Ming Shen Hsu, Ke-Horng Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

This paper proposes a modulated hysteretic current control (MHCC) technique to improve the transient response of a DC-DC boost converter, which suffers from low bandwidth due to the existence of the right-half-plane (RHP) zero. The MHCC technique can automatically adjust the on-time value to rapidly increase the inductor current, as well as to shorten the transient response time. In addition, based on the characteristic of the RHP zero, the compensation poles and zero are deliberately adjusted to achieve fast transient response in case of load transient condition and adequate phase margin in steady state. Experimental results show the improvement of transient recovery time over 7.2 times in the load transient response compared with the conventional boost converter design when the load current changes from light to heavy or vice versa. The power consumption overhead is merely 1%.

Original languageEnglish
Article number5712173
Pages (from-to)1967-1979
Number of pages13
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume58
Issue number8
DOIs
StatePublished - 16 Feb 2011

Keywords

  • Boost converter
  • hysteretic current control (HCC)
  • load transient response
  • right-half-plane (RHP) zero

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