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Title: Basic circuit theoretic considerations of LED driving : voltage-source versus current-source driving
Authors: Dong, Z 
Tse, CK 
Hui, SYR
Issue Date: Dec-2016
Source: 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016, p. 1-6 How to cite?
Abstract: Light-emitting-diodes (LEDs) are solid-state devices with specific v-i characteristics. In this paper we study the basic requirement of the driving circuits and discuss the proper approach to driving LEDs from the circuit theoretic viewpoint. We compare voltage source driving and current source driving, and discuss their relative advantages and constraints. We specifically introduce the use of duality principle in developing new current-source drivers which are mostly unknown but are theoretically more versatile compared to their conventional voltage-source counterparts. Although the study exploits very basic circuit theory, it is not always borne in mind or known by practitioners the impact of the choice of circuit topologies on the current and voltage ripples, range of duty cycle variation, sensitivity, and efficiency of LED drivers. This paper presents a systematic and comparative exposition of the circuit theory of driving LEDs, with experimental evidences supporting the major conclusions. Finally, we illustrate how these results can readily lead to an effective LED driver design.
Description: 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016, Auckland, New Zealand, 5-8 December 2016
ISBN: 9781509015467
DOI: 10.1109/SPEC.2016.7846015
Appears in Collections:Conference Paper

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