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- Title
Highly accurate average current controller using charge sharing method for LED lamp driver.
- Authors
Ahn, H. -A.; Hong, S. -K.; Kwon, O. -K.
- 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 μm CMOS process technology and occupied a small chip area of 1028 μm × 728 μm. 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.
- Subjects
ELECTRONIC controllers; LIGHT emitting diodes; LUMINANCE (Photometry); DIELECTRIC amplifiers; CHARGE sharing (Digital electronics)
- Publication
Electronics Letters (Wiley-Blackwell), 2018, Vol 54, Issue 7, p439
- ISSN
0013-5194
- Publication type
Article
- DOI
10.1049/el.2017.4028