A dual-input high-efficiency li-ion battery charger with current-mode smooth transition and ripple reduction circuits

Chung Cheng Su, Yen Wei Liu, Chung-Chih Hung

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

1 Scopus citations

Abstract

A Li-ion battery charger with dual input source capability and high efficiency is proposed in this work. An internal source determination circuit could choose the sufficient energy source for charging system. Also, a new approach of smooth transition to avoid oscillation between charging mode switching is used through current-mode-like smooth transition circuit. Pulse frequency modulation with adaptive off-time control is applied to the charger to reduce the requirement of compensation design. The charging current is controlled not only by the current loop but also through the ripple reduction circuit to suppress the increasing charging current ripple as the battery voltage rises. The chip was fabricated in TSMC 0.35-μm CMOS process.

Original languageEnglish
Title of host publication2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages468-471
Number of pages4
ISBN (Electronic)9781509063895
DOIs
StatePublished - 27 Sep 2017
Event60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017 - Boston, United States
Duration: 6 Aug 20179 Aug 2017

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2017-August
ISSN (Print)1548-3746

Conference

Conference60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017
CountryUnited States
CityBoston
Period6/08/179/08/17

Keywords

  • Battery charger
  • Constant-current (CC) charger
  • Constant-voltage (CV) charger

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    Su, C. C., Liu, Y. W., & Hung, C-C. (2017). A dual-input high-efficiency li-ion battery charger with current-mode smooth transition and ripple reduction circuits. In 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017 (pp. 468-471). [8052961] (Midwest Symposium on Circuits and Systems; Vol. 2017-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2017.8052961