Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.07d
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- Pages.2531-2533
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- 2001
Analog-Digital Switching Mixed Mode Low Ripple - High Efficiency Li-Ion Battery Charger
아날로그 - 디지털 스위칭 혼합형 저 리플- 고 효율 Li-Ion 배터리 충전기
- Jung, Sang-Hwa (Department of Electrical Engineering KAIST) ;
- Woo, Young-Jin (Department of Electrical Engineering KAIST) ;
- Kim, Nam-In (Department of Electrical Engineering KAIST) ;
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Cho, Gyu-Hyeong
(Department of Electrical Engineering KAIST)
- 정상화 (한국과학기술원 전기 및 전자공학과) ;
- 우영진 (한국과학기술원 전기 및 전자공학과) ;
- 김남인 (한국과학기술원 전기 및 전자공학과) ;
-
조규형
(한국과학기술원 전기 및 전자공학과)
- Published : 2001.07.18
Abstract
This paper describes a low noise and high efficiency analog-digital switching mixed mode battery charger for production facilities of Li-Ion batteries. The requirements for battery chargers for production facilities are very strict. The accuracy of output voltage and output current should be below 0.1% with very low ripple current. Therefore analog type linear regulators are widely used for battery charger in spite of their inefficiency and bulkiness. We combined linear regulator as a voltage source with digital switching converter as a dependent current source. Low current ripple and high accuracy are obtained by linear regulator while high efficiency is achieved by digital switching converter. Experimental results show that proposed method has 0.1% ripple and 90% efficiency at an output current of 1A for a battery voltage of 4V.
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