Abstract
In this paper, a new capacitor-less DC-DC converter is proposed to be used as a light emitting diode (LED) driver. The design is based on the utilization of the internal capacitance of the LED to replace the smoothing capacitor. LED lighting systems usually have many LEDs for better illumination that can reach multiple tens of LEDs. Such configuration can be utilized to enlarge the total internal capacitance and hence minimize the output ripple. Also, the switching frequency is selected such that a minimum ripple appears at the output. The functionality of the proposed design is confirmed experimentally and the efficiency of the driver is 85% at full load.
Highlights
Light emitting diodes (LEDs) are starting to experience widespread usage in many lighting applications
Several works on electrolytic capacitor-less LED drives have been presented to maximize the overall lifetime of the LED system and the recent states of the art are given in [1–7]
The LED used is the sum of 3 series packages of 11 parallel LEDs per package giving a total of 33 LEDs
Summary
Electrical Engineering Department, Faculty of Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. A new capacitor-less DC-DC converter is proposed to be used as a light emitting diode (LED) driver. The design is based on the utilization of the internal capacitance of the LED to replace the smoothing capacitor. LED lighting systems usually have many LEDs for better illumination that can reach multiple tens of LEDs. LED lighting systems usually have many LEDs for better illumination that can reach multiple tens of LEDs Such configuration can be utilized to enlarge the total internal capacitance and minimize the output ripple. The switching frequency is selected such that a minimum ripple appears at the output. The functionality of the proposed design is confirmed experimentally and the efficiency of the driver is 85% at full load
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