LED Driver Circuit with Series-Input-Connected Converter Cells Operating in Continuous Conduction Mode

2010 ◽  
Vol 25 (3) ◽  
pp. 574-582 ◽  
Author(s):  
Qingcong Hu ◽  
R. Zane
Keyword(s):  
Led Driver ◽  
Driver Circuit ◽  
Conduction Mode ◽  
Continuous Conduction Mode

The Design of High Power LED Driver Power Supply Based on the Pattern of LLC Harmonic

2014 ◽  
Vol 997 ◽  
pp. 862-867
Author(s):  
Ting Cao
Keyword(s):  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Low Loss ◽  
Led Driver ◽  
High Power Led ◽  
Driver Circuit ◽  
Llc Resonant Converter ◽  
Working Principle ◽  
Conduction Mode

The working principle of LLC resonant converter is analyzed. On the basis of the analysis, a high power LED driver power supply circuit is designed based on LLC resonant model. Driver circuit is two-stage: the pre-driver circuit using boundary-conduction mode controller L6562 achieves PFC function, while the post-stage LLC half-bridge topology provides constant pressure parts. This structure makes the overall efficiency of the circuit is higher. And the simulation experiment of the circuit is carried out and the experimental results verify that the driver power supply can achieve high efficiency, low loss and so on.

Comparison of Dc-Dc SEPIC, CUK and Flyback Converters Based LED Drivers

2020 ◽  
pp. 99-107
Author(s):  
Erdal Sehirli
Keyword(s):  
Integrated Circuit ◽  
Closed Loop ◽  
Input Voltage ◽  
Open Loop ◽  
Current Sensor ◽  
Switching Frequency ◽  
Led Driver ◽  
Advantages And Disadvantages ◽  
Led Drivers ◽  
Conduction Mode

This paper presents the comparison of LED driver topologies that include SEPIC, CUK and FLYBACK DC-DC converters. Both topologies are designed for 8W power and operated in discontinuous conduction mode (DCM) with 88 kHz switching frequency. Furthermore, inductors of SEPIC and CUK converters are wounded as coupled. Applications are realized by using SG3524 integrated circuit for open loop and PIC16F877 microcontroller for closed loop. Besides, ACS712 current sensor used to limit maximum LED current for closed loop applications. Finally, SEPIC, CUK and FLYBACK DC-DC LED drivers are compared with respect to LED current, LED voltage, input voltage and current. Also, advantages and disadvantages of all topologies are concluded.

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
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