电流(流体)
控制器(灌溉)
电荷(物理)
电气工程
计算机科学
材料科学
光电子学
电子工程
工程类
物理
农学
量子力学
生物
作者
Hyun-A Ahn,S.‐K. Hong,Oh‐Kyong Kwon
出处
期刊:Electronics Letters
[Institution of Engineering and Technology]
日期:2018-01-25
卷期号:54 (7): 439-441
摘要
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.
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