Taylor-series-expression-based equivalent circuit models of LED for analysis of LED driver system

Ray-Lee Lin, Shun Yao Liu, Chia Chun Lee, Yi Chun Chang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

This paper presents the Taylor series expression based light-emitting-diode (LED) model for the analysis of the LED driver system. In order to precisely describe the nonlinear V-I curve of LEDs, Taylor series can be utilized to express the Shockley equation of LEDs for the derivations of the dc and small-signal equivalent models. Based on the proposed LED models, the LED array with M paralleled strings of N LEDs in series can be constructed. Furthermore, the equivalent resistances of the N × M LED array can be derived. Finally, one LED array with eight paralleled strings of 15 LEDs in series is constructed to verify the equivalent small-signal resistance with the measured results.

Original languageEnglish
Article number6507252
Pages (from-to)1854-1862
Number of pages9
JournalIEEE Transactions on Industry Applications
Volume49
Issue number4
DOIs
Publication statusPublished - 2013 Aug 5

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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