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Highly accurate average current controller using charge sharing method for LED lamp driver

Title
Highly accurate average current controller using charge sharing method for LED lamp driver
Author
홍성관
Keywords
driver circuits; CMOS integrated circuits; lighting; LED lamps; electric current control
Issue Date
2018-04
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
ELECTRONICS LETTERS, v. 54, no. 7, page. 439-440
Abstract
An average current controller (ACC) that can accurately regulate the light-emitting diode (LED) forward current for lighting applications is proposed. The proposed ACC employs a charge sharing method to achieve a highly accurate average LED forward current by compensating for an error occurred when the LED forward current is sampled. It was fabricated using a 0.35 mu m CMOS process technology and occupied a small chip area of 1028 mu m x 728 mu m. The measurement results showed that the proposed ACC achieved a deviation in the average LED forward current of < 0.6% over the entire input voltage range while achieving a maximum power efficiency of 93.6%. Therefore, the proposed ACC is suitable for high-quality LED lighting systems requiring an accurate LED forward current.
URI
https://digital-library.theiet.org/content/journals/10.1049/el.2017.4028http://repository.hanyang.ac.kr/handle/20.500.11754/118428
ISSN
0013-5194; 1350-911X
DOI
10.1049/el.2017.4028
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > RESEARCH INSTITUTE OF INFORMATION DISPLAY(디스플레이공학연구소) > Articles
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