Design of a high-efficiency quasi-resonant LED street-lamp power supply

In recent years, LED has been widely used in the street-lamp lighting for its energy-saving and environmental protection. In order to meet with the electrical characteristic of high-power LED lighting, a quasi-resonant LED street-lamp power supply with high-voltage and constant-current control was designed by using FAN6300 on the basis of the traditional hard-switched flyback converter. The operating principle of such power supply was illustrated. The circuit diagram was given, the calculation and selection methods of some key circuit parameters were presented. The feasibility and effectiveness of the whole design were verified by experimental results.