A reduced Li-Ion battery charger for portable applications

Author

Chia-Chun Tsai

Author_Institution

Dept. of Comput. Sci. & Inf. Eng., Nanhua Univ., Chiayi, Taiwan

fYear

2013

fDate

23-25 July 2013

Firstpage

1718

Lastpage

1722

Abstract

This paper presents a reduced Li-Ion battery charger design for portable applications. The charger supplies the trickle current, large constant current, and constant voltage to a Li-Ion battery in order for the safety charging. The charger is designed using the technology of low dropout voltage regulator associated with TSMC 0.35μm 2P4M CMOS process and the whole circuits are simulated by HSPICE. Experimental results provide the trickle current of 304mA, maximum charging current of 711mA, and charging voltage of 4.2V at the power supply of 5V. The power efficiency of 67.4% is acceptable under the power consumption of 851mW. The chip area including pads is 1.1×1.1 mm² and the total number of transistors is 164.

Keywords

CMOS integrated circuits; battery chargers; secondary cells; voltage regulators; HSPICE; Li; TSMC 2P4M CMOS process; constant voltage; current 304 mA; efficiency 67.4 percent; large constant current; low dropout voltage regulator; portable applications; power 851 mW; reduced lithium-ion battery charger; safety charging; size 0.35 mum; trickle current; voltage 4.2 V; voltage 5 V; Batteries; Power supplies; Regulators; Simulation; Transistors; Voltage control; Voltage measurement; Li-Ion battery charger; line regulation; load regulation; low dropout voltage regulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Natural Computation (ICNC), 2013 Ninth International Conference on

Conference_Location

Shenyang

Type

conf

DOI

10.1109/ICNC.2013.6818259

Filename

6818259