A fixed-frequency pulsewidth modulation based quasi-sliding-mode controller for buck converters

Siew Chong Tan, Y. M. Lai, Chi Kong Tse, Martin K.H. Cheung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

224 Citations (Scopus)


This paper presents the design and analysis of a fixed-frequency pulsewidth modulation (PWM)-based quasi-sliding-mode voltage controller for buck converters from a circuit design perspective. A practical design approach that aims at systematizing the procedure for the selection of the control parameters is presented. In addition, a simple analog form of the controller for practical realization is provided. The resulting controller exhibits the same structure as a PWM proportional derivative (PD) linear controller, but with an additional component consisting of the instantaneous input voltage and the instantaneous output voltage. Simulation and experimental results show that the performance of the converter agrees with the theoretical design.
Original languageEnglish
Pages (from-to)1379-1392
Number of pages14
JournalIEEE Transactions on Power Electronics
Issue number6
Publication statusPublished - 1 Nov 2005


  • Buck converter
  • Fixed-frequency
  • Hysteresis-modulation
  • Pulsewidth modulation (PWM)
  • Quasi-sliding-mode (QSM)
  • Sliding-mode (SM) control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'A fixed-frequency pulsewidth modulation based quasi-sliding-mode controller for buck converters'. Together they form a unique fingerprint.

Cite this