Optimal Design of LED Array Combinations for CCM Single-Loop Control LED Drivers

Ray Lee Lin, Jhong Yan Tsai, Shun Yao Liu, Hsin Wei Chiang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


This paper presents the optimal design of the light-emitting diode (LED) array combinations for three typical nonisolated continuous-conduction mode single-loop control LED drivers. Based on the LED Taylor series model and the equivalent circuits of these three LED drivers, the quality factor functions in their transfer functions of the control-to-output current are derived to predict the optimal combination of the LED arrays according to the given circuit and LED parameters to fulfill the requirement of critical damping and maximum efficiency power conversion, which happen at unity quality factor. The three prototype circuits of three LED drivers with 120 LEDs are presented to verify the optimal design of the corresponding LED array combinations through the theoretical, simulation, and experimental results.

Original languageEnglish
Article number7062016
Pages (from-to)609-616
Number of pages8
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number3
Publication statusPublished - 2015 Sep 30

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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