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.

Design of Isolated Flyback LED Driver Based on LYT4326E

2014 ◽  
Vol 1049-1050 ◽  
pp. 657-660
Author(s):  
Hong Zhuan Cai ◽  
Qing Kai Geng
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Short Circuit ◽  
Drive Power ◽  
Led Driver ◽  
Power Supply Circuit ◽  
High Power Factor ◽  
Working Principle

The design of a high efficiency, silicon controlled dimming and power factor correction (PFC) LED drive power supply is proposed.The LED driver power supply uses isolated flyback topology,with high efficiency and power factor,and also has a no-load protection,short circuit protection and overvoltage protection.The power controller chip LYT4326E and working principle of the circuit are analyzed.Experimental results verify that the full load efficiency of the power supply circuit is over 86%,with a high power factor and can run stably and reliably.

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

Design of High-Power LED Drive Circuit with Economical High Power Factor Based on NCP1200

2014 ◽  
Vol 556-562 ◽  
pp. 1806-1810 ◽  
Author(s):  
Long Teng Wang ◽  
Yong Gao Jin
Keyword(s):  
Power Factor ◽  
High Power ◽  
Low Cost ◽  
Current Drive ◽  
Constant Current ◽  
Led Driver ◽  
Amplitude Control ◽  
High Power Factor ◽  
High Power Led ◽  
Driver Circuit

This paper proposes a high-power LED driver circuit with economical high power factor based on universal chip NCP1200. NCP1200 itself doesn’t have the function of APFC, however, by adding a simple amplitude control circuit in the periphery without using special dedicated APFC chip, the APFC rectification mode can be achieved at work, which greatly reduce the pulse current caused by first-time rectification, the power factor can be as high as 98%, and it can achieve the goal of constant current drive in the meantime. The designed circuit is simple, low cost, stable and reliable work ability and it has high cost performance.

Development of High Power LED Driver Using LNK418EG

2017 ◽  
Vol 866 ◽  
pp. 345-349
Author(s):  
Nitipat Eawsakul ◽  
Chalermpol Reaungepattanawiwat
Keyword(s):  
High Power ◽  
Electromotive Force ◽  
High Efficiency ◽  
Toxic Substance ◽  
Input Current ◽  
Harmonic Series ◽  
Led Driver ◽  
Light Production ◽  
High Power Led ◽  
Constant Output

Currently, the use of Light Emitting Diodes (LED) bulbs has been intensively increasing since LED possess various qualifications of high efficiency in light production, not radiating heat, no toxic substance, lifespan longer than other bulbs. However, when the circuit of LED Driver is connected directly to high power LED with an AC source, it causes high losses of energy and the occurrence of the non-sinusoidal waveforms thus causing the harmonic series in the power supply system. In the research, a circuit for driving high power LED at high power of 30 watts was created by using a Fly-Back converter converting AC into DC current. At the same time, IC LinkSwitch-PH model LNK418EG was applied to act as a factor correction for electric power and control the constant output currents and electromotive force. After the input AC current at 180-240 volts was applied on the experimental circuit, the input current which has the waveform close to a sine shape resulted in the low distortion of the input current but provided the constant output current and electromotive force. LED’s high luminance could be detected at ​​300 luxs at a distance of one meter and its performance was 90 percentages.

A Novel High Power Factor Soft-Switching Converter

2012 ◽  
Vol 433-440 ◽  
pp. 5549-5555
Author(s):  
Yun Tao Yue ◽  
Yan Lin
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Soft Switching ◽  
Switching Converter ◽  
Turn On ◽  
High Power Factor ◽  
Power Factor Corrector ◽  
Zero Voltage

A novel scheme of low power communication power supply with high power factor and soft-switching is presented, a power factor corrector and dc/dc converter of passive lossless soft-switching is based on a ML4803 IC control. DC/DC converter introduces a novel two-transistor forward soft-switching technique, which realizes zero-voltage turn-on and turn-off, with no additional switches. a communication power supply module is developed in this paper. It has the characteristics of rapid dynamic response, high power factor, high efficiency and small bulk ect.

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