Title :
Design of a multi-mode and high-stability linear charger for Lithium-ion batteries
Author :
Dai, Lan ; Ning, Ke-Qing ; Jiang, Yan-Feng
Author_Institution :
Dept. of Microelectron., North China Univ. of Technol., Beijing, China
Abstract :
In this paper, a monolithic linear charger for single-cell Lithium-ion batteries is presented. It is capable of operating within USB power specifications and adopts multiple charging modes (constant-current and constant-voltage). Due to novel constant-current and constant-voltage charging circuits, it achieves high stability and high accuracy charging voltage. In addition, an internal thermal feedback loop reduces the programmed charging current if the die temperature attempts to rise above a preset value of approximately 120□. The chip is implemented in a CSMC 0.5um CMOS mixed-signal process, experimental results shows the charging current of constant-current mode is 497mA and the final voltage of the battery after is 4.191V.
Keywords :
battery chargers; secondary cells; CMOS mixed-signal process; Lithium-ion battery; USB power specification; constant-voltage charging circuit; die temperature; high stability linear charger; monolithic linear charger; thermal feedback loop; Accuracy; Batteries; CMOS integrated circuits; Circuit stability; Modulation; Thermal stability; Transistors;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667724
