Early deployment of a new generation of LED driver power technology
At present, the key issues of LED drive power are quality issues (including life and reliability), efficiency issues, and cost issues. The biggest problem is the lack of industry standards. At present, most LED lamp failures are caused by the driving power supply, which greatly delays the popularization and promotion of LED lighting. The use of low-efficiency LED power supplies seriously affects the energy-saving effect of LED lamps. Low efficiency means high temperature rise, short life and low reliability. The unique multi-channel constant current output requirements also greatly increase the power supply cost. The lack of industry standards is the biggest problem. Many products on the market are designed according to general industrial power supply. The life expectancy is very short, and there is no lightning protection and waterproof design. The small number of varieties leads to high design (including UL demonstration) and production cost, which seriously affects reliability. Sex.
The first generation of LED driver power supply is mainly designed to be completely separate and independent. The system efficiency is low, generally around 84%~88%. There are system matching problems, while the heat is serious, the life is short, the reliability is low and the cost is high.
The second-generation LED drive power supply constant voltage source and constant current source module are designed in a centralized manner, the system efficiency is obviously improved, reaching 88%~91%, the life and reliability are greatly improved, and the cost is obviously reduced. The power conversion is also completed in three stages of AC / DCPFC + DC / DC isolation buck + multi-channel DC / D constant current.
The next-generation LED driver power supply, the power conversion is completed in two stages, the new main circuit topology plus a new control scheme, the system efficiency is further greatly improved, reaching 94%~96%, and the driver energy consumption is further reduced by 30% compared with the second generation product. ~50%, the life and reliability are further greatly improved, the cost is greatly reduced, and the intelligent stepless dimming function is also added. It is recommended to deploy a new generation of LED driver power technology early. (From "Semiconductor Lighting" magazine, 2010, Issue 4, edited by maysoong)
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