Optimal design of LED array for single-loop CCM buck-boost LED driver

Author

Lin, Ray-Lee ; Lee, Chia-Chun ; Chang, Yi-Chun

Author_Institution

Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2011

fDate

9-13 Oct. 2011

Firstpage

1

Lastpage

5

Abstract

This paper presents optimal design of the light-emitting-diode (LED) array for the single-loop CCM buck-boost LED driver. The exponential function for describing the characteristics of the LED is used to represent the relationship between the forward voltage and current of LEDs. Moreover, in order to analyze the system characteristics, the equivalent circuits of the single-loop buck-boost driver for the LED array are built. Considering the requirement of the system stability and maximum-efficiency power transferring, the unity quality factor is preferred for the optimal design of the LED array. In this paper, the derived transfer functions are verified with SIMPLIS^® simulation results.

Keywords

LED lamps; Q-factor; power convertors; LED array; SIMPLIS simulation; exponential function; forward current; forward voltage; light-emitting-diode array; maximum-efficiency power transferring; single-loop CCM buck-boost LED driver; system stability; unity quality factor; Arrays; Indexes; Indium tin oxide; Light emitting diodes; Array; Buck-boost converter; CCM; Continuous-conduction-mode; Light-emitting-diode; Modeling; Quality factor; Single-loop; System analysis; Taylor series expression;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting (IAS), 2011 IEEE

Conference_Location

Orlando, FL

ISSN

0197-2618

Print_ISBN

978-1-4244-9498-9

Type

conf

DOI

10.1109/IAS.2011.6074373

Filename

6074373