NDLI: A Dimmable LED Driver With Resistive DAC Feedback Control for Adaptive Voltage Regulation

Content Provider	IEEE Xplore Digital Library
Author	Lohaus, L. Rossius, A. Dietrich, S. Wunderlich, R. Heinen, S.
Copyright Year	1972
Abstract	This paper proposes a dimmable energy-efficient light-emitting diode (LED) driver for applications in interior lighting. High efficiency is achieved by an adaptive voltage regulation, which minimizes power losses in the linear current regulator. A digital control mechanism employing a resistive digital-to-analog converter for feeding the analog feedback input of a dc-dc converter is introduced. It is shown that the digital control methodology gives maximum design flexibility and enhances control over regulation speed and stability. In an experimental setup, the proposed concept is verified and evaluated. Operating at an input voltage of 24 V, the LED driver provides a relatively wide output voltage range of 3.5-38 V. Output current is regulated to 700 mA with a steady-state precision of more than 98.8%, whereas pulse width modulation dimming with a frequency of 1 kHz and shortest on-time of 4 μs is employed. A peak efficiency of the complete system of 93.9% is achieved.
Sponsorship	IEEE Industry Applications Society
Starting Page	3254
Ending Page	3262
Page Count	9
File Size	1391768
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Light emitting diodes Regulators Pulse width modulation Voltage measurement Current measurement Feedback control pulsewidth modulation (PWM) dimming Adaptive digital control adaptive voltage regulation energy efficient lighting high efficieny light-emitting diode (LED) driver
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Electrical and Electronic Engineering Control and Systems Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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