Adaptive prediction in digitally controlled buck converter with fast load transient response

Albert Ting Leung Lee, Philip Ching Ho Chan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

7 Citations (Scopus)

Abstract

An adaptive prediction scheme based on linear extrapolation for digitally controlled voltage-mode buck-type switching converter is presented. A major drawback of conventional digitally controlled switching converters is bandwidth limitation due to the additional phase lag in the digital feedback control loop. By predicting the future error voltage, the ADC sampling time delay is compensated in order to achieve a higher bandwidth even with a modest sampling rate. Both simulation and measurement results show that the output voltage settling time of the digitally controlled buck converter is reduced by as much as 28% with the proposed adaptive prediction. The fastest settling time in response to a 600mA load transient is around 15μs, approaching the transient response of the state-of-the-art analog-based controller.
Original languageEnglish
Title of host publication2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012
DOIs
Publication statusPublished - 1 Oct 2012
Event2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012 - Kyoto, Japan
Duration: 10 Jul 201213 Jul 2012

Conference

Conference2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012
Country/TerritoryJapan
CityKyoto
Period10/07/1213/07/12

Keywords

  • adaptive FIR filter
  • Adaptive prediction
  • buck converter
  • digital controller
  • IIR filter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Modelling and Simulation

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