Title :
A multi-mode LDO-based Li-ion battery charger in 0.35μm CMOS technology
Author :
Tsai, Chia-Chun ; Lin, Chin-Yen ; Hwang, Yuh-Shyan ; Lee, Wen-Ta ; Lee, Trong-Yen
Author_Institution :
Inst. of Comput., Commun. & Control Nat. Taipei Univ. of Technol., Taiwan
Abstract :
The paper designs a CMOS Li-ion battery charger that uses multi-mode low dropout (LDO) voltage regulator associated with current sense circuit to supply trickle current, large constant current and constant voltage. The whole circuits have been approved by HSPICE with TSMC 0.35μm 2P4M CMOS process. The simulation results provide the trickle current of 150mA, the maximum charging current of 312mA and charging voltage of 4.2V at input voltage of 4.5V. The power efficiency of 72.3% is acceptable under the power of 1.28 W.
Keywords :
CMOS integrated circuits; battery chargers; lithium; voltage regulators; 0.35 micron; 1.28 W; 150 mA; 312 mA; 4.2 V; 4.5 V; CMOS technology; HSPICE; Li; Li-ion battery charger; TSMC 2P4M standard; constant current; constant voltage; current sense circuit; maximum charging current; multimode low dropout battery charger; trickle current; voltage regulator; Batteries; CMOS process; CMOS technology; Circuit simulation; Low voltage; Portable computers; Protection; Regulators; Temperature sensors; Voltage control;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1412688
