Design of control IC for multiphase interleaved buck converter with alternate phase-shedding

Ji Shiang Lee, Chun Yu Huang, Tsorng Juu Liang, Kai Hui Chen

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

3 Citations (Scopus)

Abstract

In this paper, a controller for a multiphase interleaved buck converter with alternate phase-shedding is realized. With phase-shedding control, the efficiency at low load condition is improved by turning-on appropriate number of phase(s), but the temperature on the active phase(s) is higher than the off phase(s) that cause the temperature unevenly distribution. To solve this problem, the alternate phase-shedding is implemented in the proposed controller. The phases take turns to provide the load current at low load condition to distribute power to each phase and share the same load as well as improve reliability. The proposed controller would implement interleaved control regardless the number of active phases. In addition, taking advantage of the application of high step-down ratio, the proposed control structure that input current is sensed to control each phase is adopted. The number of components and pins of controller can be reduced. This chip is fabricated with TSMC 0.25um CMOS high voltage mixed signal general purpose process and is tested with an input voltage of 12 V, output voltage of 1.2 V, and output power of 72 W three-phase buck converter to verify the feasibility.

Original languageEnglish
Title of host publication9th International Conference on Power Electronics - ECCE Asia
Subtitle of host publication"Green World with Power Electronics", ICPE 2015-ECCE Asia
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1025-1032
Number of pages8
ISBN (Electronic)9788957082546
DOIs
Publication statusPublished - 2015 Jul 27
Event9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia - Seoul, Korea, Republic of
Duration: 2015 Jun 12015 Jun 5

Publication series

Name9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia

Other

Other9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia
CountryKorea, Republic of
CitySeoul
Period15-06-0115-06-05

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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