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
收藏
页码：1775 / 1778
页数：4
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