A 0.18µm CMOS 91%-Efficiency 0.1-to-2A Scalable Buck-Boost DC-DC Converter for LED Drivers

📋 论文概要

提出一种0.18µm CMOS工艺的buck-boost DC-DC转换器，用于LED驱动，支持0.1到2A的宽电流范围，最高效率达91%。通过调节LED端电压来最小化驱动电流源上的压降，从而提升效率。

💡 主要创新点

• 采用可扩展的buck-boost拓扑，适应0.1至2A的宽负载电流范围，满足不同LED驱动需求。
• 通过动态电压调节技术最小化电流源压降，实现91%的高效率。
• 集成电流源与电压调节功能，简化LED驱动系统设计。

🏷 关键词

📄 原文摘要

Several emerging portable applications require high-efficiency LED drivers [1-4]. An LED driver is basically a current source that forces the current required for achieving the desired light emission into the LED. In order to increase the LED driver efficiency, besides controlling the LED current, it is necessary to regulate the voltage applied to the LED itself, to minimize the voltage drop across the driver current source and, hence, the power consumption. Depending on the kind of LED and on the current forced through the LED itself (0.1 to 2A in this design) and, hence, on the desired light emission, the voltage required to drive the LED, while maintaining the voltage headroom across the driver current source to the minimum, varies over a wide range (0 to 5V). Starting from a standard voltage supply in the range 2.7 to 5.5V, a buck-

👥 作者与机构

Piero Malcovati1, Massimiliano Belloni1, Fabio Gozzini2,

Cristiano Bazzani2, Andrea Baschirotto3 University of Pavia, Pavia, Italy Mindspeed, Newport Beach, CA 3 University of Milano-Bicocca, Milano, Italy 1 2