An area-efficient amplifier-less digitally-controlled li-ion battery charger in 0.35μm CMOS
Journal
2017 IEEE Asian Solid-State Circuits Conference, A-SSCC 2017 - Proceedings
Journal Volume
2017-January
Pages
37-40
Date Issued
2017
Author(s)
Lin, S.-Y.
Abstract
In this paper, an amplifier-less digitally-controlled lithium-ion (Li-Ion) battery charger is presented. Owing to the digitally-controlled technique, the proposed charger eliminates all analog circuits and reduces the size of the power transistor. Hence, the proposed charger features a simple circuit structure and a small chip area. Additionally, this charger provides essential operations including constant-current (CC) and constant-voltage (CV) modes. The proposed charger is implemented in the TSMC 0.35-pm CMOS process with a 5-V power supply. The output voltage is 4.2 V, and the charging current in CC mode is 600 mA with an area of only 0.768 mm2. © 2017 IEEE.
Subjects
Battery charger; constant-current mode; constant-voltage mode; power management
SDGs
Other Subjects
CMOS integrated circuits; Heterojunction bipolar transistors; Ions; Lithium-ion batteries; Power management; Battery chargers; Charging current; Constant current; Constant current mode; Constant voltage; Constant voltage mode; Digitally controlled; Li-ion battery chargers; Charging (batteries)
Type
conference paper