Title :
Optimal Design of LED Array for Single-Loop CCM Buck–Boost LED Driver
Author :
Ray-Lee Lin ; Yi-Chun Chang ; Chia-Chun Lee
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
This paper presents the optimal combination design of the light-emitting diode (LED) array for the single-loop continuous-conduction-mode (CCM) buck-boost LED driver. Based on the Taylor series to describe the LED exponential function, the dc and small-signal transfer functions of LED arrays are derived for the system analysis of the employed single-loop CCM buck-boost LED driver. In this paper, the derived system transfer functions of the employed LED driver are verified with SIMPLIS® simulation results. The combination design of a 120-piece LED array for the employed LED driver to have power conversion with optimal efficiency is obtained and validated through the theoretical, simulation, and experimental results.
Keywords :
driver circuits; light emitting diodes; LED array optimal combination design; LED exponential function; SIMPLIS simulation; Taylor series; dc transfer functions; light-emitting diode array optimal combination design; power conversion; single-loop CCM buck-boost LED driver; single-loop continuous-conduction-mode buck-boost LED driver; small-signal transfer functions; Arrays; Equivalent circuits; Integrated circuit modeling; Light emitting diodes; Power conversion; Q-factor; Taylor series; Array; Taylor series expression; buck–boost converter; continuous conduction mode (CCM); light-emitting diode (LED); modeling; quality factor; single loop; system analysis;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2013.2243091
