Elimination of an Electrolytic Capacitor in AC/DC Light-Emitting Diode (LED) Driver With High Input Power Factor and Constant Output Current

2012 ◽  
Vol 27 (3) ◽  
pp. 1598-1607 ◽  
Author(s):  
Wu Chen ◽  
S. Y. Ron Hui
Keyword(s):  
Power Factor ◽  
Light Emitting Diode ◽  
Input Power ◽  
Electrolytic Capacitor ◽  
High Input ◽  
Output Current ◽  
Led Driver ◽  
Light Emitting ◽  
High Input Power ◽  
Constant Output

A Kind of New Electrolytic Capacitor-Less AC-DC LED Driver

2013 ◽  
Vol 416-417 ◽  
pp. 2117-2122
Author(s):  
Wan Li Chen ◽  
Zhao Ping Wang ◽  
Xue Feng Dong
Keyword(s):  
Control Method ◽  
Light Emitting Diode ◽  
Electrolytic Capacitor ◽  
Output Current ◽  
Led Driver ◽  
High Brightness ◽  
Light Emitting ◽  
Average Ratio ◽  
Long Lifetime ◽  
Pulsating Current

This paper designs a kind of new electrolytic capacitor-less LED (light-emitting diode) driver, which converts the commercial ac voltage to a pulsating current with twice the line frequency driving high-brightness LEDs. As no electrolytic capacitor is used, this driver possesses the unique advantage of long lifetime to match with that of LEDs. A method of injecting the third and fifth harmonics into the input current to reduce the peak-to-average ratio of the output current is also proposed. A 25V, 0.35A output prototype is built and tested in the laboratory, and the experimental results are presented to verify the effectiveness of the electrolytic capacitor-less LED driver and its control method.

Two-Stage Isolated Switch-Mode Power Supply With High Efficiency and High Input Power Factor

2010 ◽  
Vol 57 (11) ◽  
pp. 3754-3766 ◽  
Author(s):  
Carlos Alberto Gallo ◽  
Fernando Lessa Tofoli ◽  
João Antonio Correa Pinto
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
High Efficiency ◽  
Input Power ◽  
High Input ◽  
Two Stage ◽  
Switch Mode Power Supply ◽  
High Input Power ◽  
Switch Mode

scholarly journals CRM Buck converter with high input power factor

2021 ◽  
pp. 149-161
Author(s):  
Abdul Hakeem Memon ◽  
Manzoor Ali ◽  
Zubair Ahmed Memon ◽  
Ashfaque Ahmed Hashmani
Keyword(s):  
Power Factor ◽  
Input Power ◽  
Buck Converter ◽  
High Input ◽  
High Input Power
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