Title :
Hysteresis-Current-Controlled Buck Converter Suitable for Li-Ion Battery Charger
Author :
Yang, Fong-Cheng ; Chen, Chih-Chiang ; Chen, Jiann-Jong ; Hwang, Yuh-Shyan ; Lee, Wen-Ta
Author_Institution :
Dept. of Electron. Eng., Nat. Taipei Univ. of Technol., Taipei
Abstract :
A new hysteresis-current-controlled (HCC) buck converter suitable for Li-ion battery charger is presented in this paper. The technique adopted in this charger is constant current/constant voltage dual mode, which is decided by the value of internal resistance of Li-ion battery. This technique will degrade the damage of Li-ion battery and improve the power efficiency of charger. The Li-ion battery charger is designed with 0.35 - mum CMOS DPQM processes. The simulation results show that the charger works well and confirms with theoretical analysis. The power efficiency of charger can be up to 82% under the average power of 825 mW. The chip area is only 1.71times 1.52 mm 2.
Keywords :
CMOS analogue integrated circuits; battery chargers; power convertors; secondary cells; CMOS DPQM process; Li; Li-ion battery chargers; constant current-constant voltage dual mode; hysteresis-current-controlled buck converter; power 825 mW; secondary cells; size 0.35 mum; Analytical models; Batteries; BiCMOS integrated circuits; Buck converters; CMOS process; Degradation; Driver circuits; Hysteresis; Switching circuits; Voltage;
Conference_Titel :
Communications, Circuits and Systems Proceedings, 2006 International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7803-9584-0
Electronic_ISBN :
0-7803-9585-9
DOI :
10.1109/ICCCAS.2006.285232
