Design and Verification of a High Performance LED Driver with an Efficient Current Sensing Architecture
作者机构：Department of Electrical and Electronic Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon China Peking University Shenzhen SOC Key Laboratory PKU HKUST Shenzhen Institution Shenzhen Institute of Peking University Shenzhen China Peking University Shenzhen SOC Key Laboratory PKU HKUST Shenzhen InstitutionShenzhen Institute of Peking University Shenzhen China Shenzhen Huayue Terascale Chip Ltd. Co. Shenzhen China Peking University Shenzhen SOC Key Laboratory PKU HKUST Shenzhen InstitutionShenzhen Institute of Peking University Shenzhen China Department of Electrical and Electronic Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon China Shenzhen Huayue Terascale Chip Ltd. Co. Shenzhen China
出 版 物：《Circuits and Systems》 (电路与系统（英文）)
年 卷 期：2013年第4卷第5期
页 码：393-400页
摘 要：A high power buck-boost switch-mode LED driver delivering a constant 350 mA with a power efficient current sensing scheme is presented in this paper. The LED current is extracted by differentiating the output capacitor voltage and maintained by a feedback. The circuit has been fabricated in a standard 0.35 μm AMS CMOS process. Measurement results demonstrated a power-conversion efficiency over 90% with a line regulation of 8%/V for input voltage of 3.3 V and current output between 200 mA and 350 mA.
主 题 词：LED Driver Current Sensing Capacitor Voltage Feedback Circuit
学科分类：1002[医学-临床医学类] 100214[100214] 10[医学]
D O I：10.4236/cs.2013.45052
馆 藏 号：203459772...
