Paper Info
Title
A Fast-Switching Current-Pulse Driver For Led Backlight
Abstract
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.
Year
DOI
Venue
2009
10.1109/ISCAS.2009.5118120
ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5
Keywords
Field
DocType
logic gates,light emitting diodes,brightness,liquid crystal displays,pulse width modulation,light emitting diode,high voltage,switches,capacitance,chip
Logic gate,Capacitance,NMOS logic,Computer science,Backlight,Electronic engineering,Liquid-crystal display,MOSFET,Electrical engineering,Gate driver,Amplifier
Conference
Citations 
PageRank 
References 
3
0.98
3
Authors
7
Name
Order
Citations
PageRank
Jang-Su Kim113530.86
Yong Kyu Lee29717.49
Jee-Sue Lee331.32
Young-Kyu Shin430.98
Jung-Hyun Tark530.98
Keun-Chul Ryu630.98
Byung-Do Yang730328.07