A Fast-Switching Current-Pulse Driver for LED Backlight

被引：0

作者：

Kim, Jang-Su ^{[1
]}

Lee, Yong-Kyu ^{[1
]}

Lee, Jee-Sue ^{[1
]}

Shin, Young-Kyu ^{[1
]}

Tark, Jung-Hyun ^{[1
]}

Ryu, Keun-Chul ^{[1
]}

Yang, Byung-Do ^{[1
]}

机构：

[1] Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea

来源：

ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5 | 2009年

关键词：

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a fast-switching current-pulse driver for light emitting diodes (LED) backlight is proposed. It uses a regulated drain current mirror (RD-CM) [1] and a high-voltage NMOS transistor (HV-NMOS). It achieves the fast-response current-pulse switching by using a dynamic gain-boosting amplifier (DGB-AMP). The DGB-AMP does not discharge the large HV-NMOS gate capacitance of the RD-CM when the output current switch turns off. Therefore, it does not need to charge the HV NMOS gate capacitance when the switch turns on. The proposed current-pulse driver achieves the fast current switching by removing the repetitive gate discharging and charging. Simulation results were verified with measurements performed on a fabricated chip using a 5V/40V 0.5um BCD process. It reduces the switching delay to 360ns from 700ns of the conventional current-pulse driver.

引用

页码：1775 / 1778

页数：4