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Switching Battery Charger Integrated Circuit for Mobile Devices in a 130-nm BCDMOS Process

Title
Switching Battery Charger Integrated Circuit for Mobile Devices in a 130-nm BCDMOS Process
Author
유창식
Keywords
Battery charger; BCDMOS; DC-DC conversion; Li-ion battery; switching converter
Issue Date
2016-11
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON POWER ELECTRONICS, v. 31, NO 11, Page. 7943-7952
Abstract
A switching battery charger integrated circuit (IC) for a mobile device is described which can regulate the system supply voltage and charge a Li-ion battery simultaneously. The charging current level is adaptively controlled according to the system load current and a battery can be forced to supply current to the system load when the input power is not sufficient. In order to allow a mobile device to supply power to peripheral devices, the battery charger IC can also be configured to operate as a boost dc-dc converter with the reversed direction of power flow. The operation mode of the battery charger IC is smoothly switched by adopting a diode-based mode selection scheme. Implemented in a 130-nm BCDMOS process, the battery charger IC occupies 12.25 mm(2) and has been verified to provide the appropriate charging profile for a Li-ion battery and regulate the system supply voltage under various operating conditions. The maximum charging current is 1.5 A and the output voltage ranges from 2.5 to 4.2 V. The maximum power efficiency of dc-dc conversion is 90% and 92%, respectively, for the buck and boost modes.
URI
https://ieeexplore.ieee.org/document/7372478https://repository.hanyang.ac.kr/handle/20.500.11754/101104
ISSN
0885-8993; 1941-0107
DOI
10.1109/TPEL.2016.2514518
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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