Analysis of LLC Resonant Converter for Multi-Output LED Driver with Coupled Inductor for Output Current Balancing

2021 ◽  
Vol 70 (2) ◽  
pp. 329-337
Author(s):  
Sang-Beom Park ◽  
Woo-Cheol Lee
Keyword(s):  
Resonant Converter ◽  
Output Current ◽  
Led Driver ◽  
Llc Resonant Converter

scholarly journals A High Efficiency LED Driver Circuit using LLC Resonant Converter

2010 ◽  
Vol 15 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Dae-Seong Shin ◽  
Young-Jin Jung ◽  
Sung-Soo Hong ◽  
Sang-Kyu Han ◽  
Byung-Jun Jang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Resonant Converter ◽  
Led Driver ◽  
Driver Circuit ◽  
Llc Resonant Converter

scholarly journals Design of High-efficiency LED Driver Power Supply Based on Improved Particle Swarm Optimization

2021 ◽  
Vol 2136 (1) ◽  
pp. 012021
Author(s):  
Fanghui Zhang ◽  
Huimin Qiu
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
Soft Switching ◽  
Constant Current ◽  
Resonant Converter ◽  
Led Driver ◽  
Swarm Optimization ◽  
Improved Particle Swarm Optimization ◽  
Photoelectric Properties ◽  
Llc Resonant Converter

Abstract The photoelectric properties of LED are affected by driving current and ambient temperature. To solve the problem of light wane caused by excessive current and overheating, LLC resonant converter with soft switching was chosen as the main topology, improving the power efficiency, and reducing the heat of the LED driver. Firstly, the soft-switching conditions of the LLC resonant converter are analyzed, and the constraint equation is obtained. Then, an improved particle swarm optimization algorithm is proposed to optimize the resonant parameters. The weight of particles is dynamically and adaptively changed to balance the global and local optimization performance of particles. Finally, the controller is designed to realize constant current. This design improves the efficiency of the LED driver. At the same time, the light wane is effectively suppressed by stable output current, and the rationality of the selected parameters is verified by simulation and experiment.

Design on LED Driver Based on LLC Resonant Topology

2013 ◽  
Vol 303-306 ◽  
pp. 1702-1705
Author(s):  
Jia Min Cui ◽  
Xian Feng Yu ◽  
Wei Jie Xu
Keyword(s):  
Design Process ◽  
Experimental Results ◽  
Constant Current ◽  
Resonant Converter ◽  
Led Driver ◽  
Current Output ◽  
Design Considerations ◽  
Llc Resonant Converter ◽  
Converter Design

As for the DC/DC part in high-effiency LED driver with constant current output, this paper presents the circuit based on LLC resonant topology. The principle of the LLC resonant converter, design process, and the influence of different key parameters to its performance are also prensented. Design considerations and experimental results are presented for a 200W LED driver prototype which demonstrating good performance and the efficiency of the LLC resont converter can be reached above 95%.

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