A low-cost digital controller for a switching DC converter with improved voltage regulation

M. Murshidul Islam, David Allee, Siva Konasani, Armando Rodriguez

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


A new control algorithm with improved regulation is presented for a switching dc buck converter. The controller is realized with hardware description language (HDL) and can be implemented in any process. The controller uses four decision levels, combines pulse frequency modulation (PFM), pulse width modulation (PWM), and uses dithering for improved regulation. The controller is prototyped on a field programmable gate array (FPGA) and experimental results show good performance over input and load disturbances. Importantly, the controller does not require high resolution analog-to-digital conversion for signal processing, and also does not require fast digital clocking. This controller has significant potential to be widely used in industrial applications where cost and design time are of great concern.

Original languageEnglish (US)
Pages (from-to)121-124
Number of pages4
JournalIEEE Power Electronics Letters
Issue number4
StatePublished - Dec 2004


  • Dc-dc
  • Digital controls
  • Dithering
  • Duty
  • Field programmable gate array (FPGA)
  • Pulse frequency modulation (PFM)
  • Pulse width modulation (PWM)
  • Rapid prototype
  • Regulation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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