Adaptive frequency control technique for enhancing transient performance of DC-DC converters

Hong Wei Huang*, Chun Yu Hsieh, Ke-Horng Chen, Sy Yen Kuo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Scopus citations

Abstract

An adaptive frequency control (AFC) technique is proposed for minimizing transient dropout voltage and response time of switching DC-DC converters. As we know, nonlinear fast-transient techniques with fixed switching frequency can effectively regulate the unstable output voltage back to steady-state within a short time. However, they suffer from oscillation problem because of large sourcing or sinking recovery current at output of error amplifier by fast transient circuit. Therefore, linear operation provided by AFC technique can dynamically and smoothly adjust the switching frequency, which is proportional to the output voltage variation, to regulate output voltage back to its steady-state value. In other words, AFC technique eliminates system and sub-harmonic oscillation scenarios. Experimental results demonstrate the transient dropout voltage is improved 37.8% when load current changes from 100 mA to 500 mA.

Original languageAmerican English
Title of host publicationESSCIRC 2007 - Proceedings of the 33rd European Solid-State Circuits Conference
PublisherIEEE
Pages174-177
Number of pages4
ISBN (Print)1424411254, 9781424411252
DOIs
StatePublished - 1 Dec 2007
EventESSCIRC 2007 - 33rd European Solid-State Circuits Conference - Munich, Germany
Duration: 11 Sep 200713 Sep 2007

Publication series

NameESSCIRC 2007 - Proceedings of the 33rd European Solid-State Circuits Conference

Conference

ConferenceESSCIRC 2007 - 33rd European Solid-State Circuits Conference
CountryGermany
CityMunich
Period11/09/0713/09/07

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