A Non-Inverting Buck-Boost Converter with State-Based Current Control for Li-ion Battery Management in Mobile Applications

Ki Duk Kim, Hyung Min Lee, Sung Wan Hong, Gyu Hyeong Cho

Research output: Contribution to journalArticle


A non-inverting buck-boost converter with state- based current control is proposed for Li-ion battery management. Unlike conventional multi-mode control in buck-boost converters, our control scheme utilizes a state controller with a single-level error current and a state checking clock to define the operation mode at every cycle. The state-based buck-boost (S3B) converter enables seamless mode transition and stable output regulation with fixed interleaving patterns even when input and output voltages are similar, ensuring robust mode change with inherent hysteresis. The prototype IC was fabricated in 0.18-μm BCD process and achieved 90.9% efficiency with 1.1-A maximum load current capability at 1-MHz switching frequency.

Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Publication statusAccepted/In press - 2018 Jan 1



  • buck-boost converter
  • Li-ion battery management
  • state-based current control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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