Isolated Sepic LED Power Circuit Design Research

In recent years, With energy source crisis and environmental contamination aredeteriorating continuously, energy saving, low carbon and environmental protection hasbecome a topic of common concern around the world. In power consumption, theproportion of electricity for lighting is constantly improved. Therefore, the study of greenenergy-efficient lighting, are becoming increasingly important.LED as a new type of light source, because of its high luminous efficiency, energyconsumption, long life, easy to control, environmental protection, etc., have been widelyused in a variety of lighting, or to replace the traditional lighting. LED lighting technologyhas become a hot research field of lighting, with great development potential and gooddevelopment prospects. LED power supply, as a core technology of LED lighting, LEDlighting is becoming a bottleneck in the development. LED drive power quality, determinethe reliability of LED lighting. Therefore, the drive power for LED lighting research hasgreat significance.This paper introduces a model based on isolated Sepic LED driver circuit power, witha constant output current, high power factor, high efficiency, the circuit is simple, reliable,low cost.This paper describes the history of lighting, LED lighting principles andcharacteristics of the principle, and describes the prospects and significance of LEDapplications. Second, the study of the LED drive power are analyzed, presented some ofthe commonly used topology LED driver power supply, power factor correction is a part ofthe LED drive power, power factor correction methods have been introduced in several,according to the characteristics of LED constant current drive design. This paper describesa circuit based on isolated Sepic LED power supply works and design. This paperdescribes a circuit based on isolated Sepic LED power solution. This paper presentssimulation results and experimental results.