Research On High-Power LED Street Light Switching Power Supply

In recent years, LED (light-emitting diode) has become the focus of the lightingfield due to its distinct advantages such as environmental, high efficiency, long lifetime.This paper focuses on the LED switching power supply, the major work of this paper asfollows:Firstly, the paper described the development of LED status and applicationprospects and profoundly analyzed the current research situation of LED drive power athome and abroad to determine the main direction of the paper. Secondly, the basics ofLED switching power supply topologies, modulation, and control type were introduced.This paper designed a transformer which takes advantage of AP method, EMI filter,DC-DC converter circuit and PFC circuit combining with examples.According to the market demand, the paper designs the150W driver for LEDssupplying for10-channel constant current outputs. In order to reduce theelectromagnetic interference, the power designed an EMI filter and chose a specialmode which output constant current after stable voltage to adapt to the characteristics ofLED. CRM mode PFC and ZCS quad-resonant converter is used to improve the powerfactor and total efficiency of the system. In order to achieve the intelligent control of thesystem, the driver used ATtiny261microprocessor. The driver has short-circuit,thunder-proof, over-current, over-voltage etc. auto-protective functions, applies to road,scenic spot lighting.