China LED application products with an annual output of more than 500 million yuan, LED street lamp demonstration applications, led full-color display, solar LED, landscape lighting, consumer electronics, backlight, signals, instructions, etc. application is still mainly in the field of application, but in the domestic market is prosperous background, LED product quality varies greatly, the LED driving power of asking for chaos and in recent years led enterprise reshuffle main factors. LED relies on the characteristics of high luminous efficiency, low power consumption, long service life, high safety and reliability, favorable environmental protection and so on, which makes the development of LED applications. In the led to shine at the same time, the LED driving power supply is the guarantee of the development of LED industry chain, LED power supply quality directly restricts the reliability of LED products. Therefore, in today's LED industry chain is gradually improving, LED driver matured power is also crucial.

Because LED is a sensitive semiconductor device, it has a negative temperature characteristic. So it is necessary to carry out the stable working state and protection in the application process. LED device on the driving power of the requirements of almost harsh, LED is not like the ordinary incandescent light bulbs, you can directly connect the 220V. LED is 2 - 3 volt low voltage drive, must be designed to design complex converter circuits, different uses of LED lamps, to be equipped with a different power adapter. LED driver power supply voltage matching requirements are very high. The quality of driving power supply is the key guarantee for LED long and high efficiency.

The author has investigated several specialized LED driver power supply manufacturers that the international market foreign customers of LED drive efficiency of the power conversion, the effective power, constant current accuracy, life of power supply and electromagnetic compatibility requirements are very high, a good power supply design must considering these factors. Because power supply effects in the whole lamp is like the elephant man's heart is as important!

Aside from the impact of the financial crisis on the world economy, the international market for large and United States and other international market demand for high power LED power is still very large, the export volume of the corresponding high-end LED products are less affected by the financial crisis.

In the development of LED products in the domestic market, the technical requirements of the current output of the LED driving power supply are proposed. In order to prolong the service life of the LED lamp, the power supply of the power supply circuit is designed, and the circuit of the high power supply is high, and the protective circuit is very complex, so the barrier rate increases. Component costs, production costs, service costs will increase. At present, the cost of LED is high, and the cost of power supply, which greatly limits the market competitiveness of LED products and purchasing groups, the advantages of LED products greatly reduced, which is also a key problem restricting its development and popularization.