A 97% Maximum Efficiency Fully Automated Control Turbo Boost Topology for Battery Chargers

Balakumar Muniandi, Chao Jen Huang, Chun Chieh Kuo, Te Fu Yang, Ke Horng Chen*, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In this paper, the proposed topology of a fully automated control (FAC) battery charger that provides turbo-boost operation and fully automated detection without any feedback from the system is discussed. It uses closed-loop control for automatic system load detection and automatically adjusts the battery discharge current. The advantages include shortened battery discharge time and maximum power provided by the adapter. Therefore, the FAC technique is flexible for any load system that is limited to battery chargers with the turbo boost mode support. In addition, to avoid over discharge, a battery protection circuitry is also included. The test chip is fabricated using a 0.25-\mu \text{m} CMOS process, with a maximum efficiency of 94.58% when the charger operates in the turbo boost mode, and achieves 97% maximum efficiency when the charger operates in buck charge mode.

Original languageEnglish
Article number8760562
Pages (from-to)4516-4527
Number of pages12
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number11
StatePublished - Nov 2019


  • Closed loop control
  • constant current mode
  • constant voltage mode
  • efficiency
  • fully automated control topology
  • fully automatic detection
  • self-calibrated discharging current

Fingerprint Dive into the research topics of 'A 97% Maximum Efficiency Fully Automated Control Turbo Boost Topology for Battery Chargers'. Together they form a unique fingerprint.

Cite this