Optimizing the efficiency of DC-DC converters with an analog variable-frequency controller

Jia Ming Liu, Chun Jen Yu, Yeong Chau Kuo, Tai Haur Kuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Maintaining high-efficiency through wide load ranges is important for switching DC-DC converter designs. By appropriately varying the switching frequencies with various load currents, the power-efficiency can be improved. The optimal relationship of switching frequencies versus load currents can be obtained by evaluating the power-loss models of switching converters. In this paper, a variable-frequency controller (VFC) circuit which can realize the optimal relationship is proposed. The VFC circuit can easily accommodate with various switching converters. A switching DC-DC buck converter with the proposed VFC circuit is designed. Compared to existing converters, variable-frequency control can be achieved with lower cost and lower controller power-loss by employing the novel VFC circuit.

Original languageEnglish
Title of host publicationProceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
Pages910-913
Number of pages4
DOIs
Publication statusPublished - 2008 Dec 1
EventAPCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems - Macao, China
Duration: 2008 Nov 302008 Dec 3

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

OtherAPCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
CountryChina
CityMacao
Period08-11-3008-12-03

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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    Liu, J. M., Yu, C. J., Kuo, Y. C., & Kuo, T. H. (2008). Optimizing the efficiency of DC-DC converters with an analog variable-frequency controller. In Proceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems (pp. 910-913). [4746171] (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS). https://doi.org/10.1109/APCCAS.2008.4746171