NDLI: A white LED backlight driving IC with 3-bit dimming controller

Content Provider	IEEE Xplore Digital Library
Author	Guo-Ming Sung Sheng-Kai Peng Yen-Tang Chang
Copyright Year	2011
Description	Author affiliation: Department of Electrical Engineering, National Taipei University of Technology, 1, Sec. 3, Zhung-Xiao E. Road, Taiwan (Guo-Ming Sung) \|\| Graduate Institute of Automation Technology, National Taipei University of Technology, 1, Sec. 3, Zhung-Xiao E. Road, Taiwan (Sheng-Kai Peng; Yen-Tang Chang)
Abstract	This paper presents a white LED backlight driving chip with 3-bit dimming controller and duty-variable power MOS which can be modified with the voltage-mode pulse width modulation (PWM). In the proposed chip, a 3-bit digital-to-analog converter (DAC) and a ramp generator are used to provide eight pulses with variable width through a voltage comparator. Thus, a 3-bit dimming controller can be implemented with those duty cycles for white LED backlight driver. In this paper, the proposed chip is designed and implemented with TSMC 0.35 µm 2P4M CMOS process. The simulation results of the switching DC-DC boost converter show that the output voltage, output current, and chip area are 20 V, 20 mA, and 1.45×1.28 $mm^{2},$ respectively, at the supply voltage of 3.7 V. The output voltage of 20 V can drive five white LEDs because that a white LED works with a driving voltage of 3.5 V and a driving current of 20 mA.
Starting Page	79
Ending Page	84
File Size	415814
Page Count	6
File Format	PDF
ISBN	9781457701450
e-ISBN	9781457701443
DOI	10.1109/ASQED.2011.6111706
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-19
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistors Latches digital-to-analog converter LED backlight driver pulse-width modulation Light emitting diodes Generators Transistors Voltage control dimming controller DC-DC boost converter Clocks
Content Type	Text
Resource Type	Article

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