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Green lighting with thermal LED drive power market

  • Categories:Industry news
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  • Time of issue:2020-01-17 17:02
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(Summary description)

Green lighting with thermal LED drive power market

(Summary description)

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2020-01-17 17:02
  • Views:
Information
Relying on the characteristics of high luminous efficiency, low power consumption, long service life, strong safety and reliability, and environmental protection, LED applications have achieved blowout development in 2008. At the same time that LED shines, LED driving power is the guarantee for the development of the LED industry chain. The quality of LED power directly restricts the reliability of LED products. Therefore, today, in China's LED industry chain is gradually improving, Maturity is also crucial.
Because LED is a sensitive semiconductor device, it also has negative temperature characteristics. Therefore, in the application process, it is necessary to stabilize the working state and protect it, which leads to the concept of driving. The requirements of LED devices for driving power are almost harsh. Unlike ordinary incandescent light bulbs, LEDs can be directly connected to 220V AC mains. LEDs are driven by low voltages of 2-3 volts. Complex conversion circuits must be designed. Different uses of LED lights must be equipped with different power adapters. LED drive power supply voltage matching is very demanding. The quality of the driving power supply is the key guarantee for the longevity and efficiency of the LED.
In the international market, foreign customers have very high requirements for the efficiency conversion, effective power, constant current accuracy, power supply life, and electromagnetic compatibility of LED driving power supplies. When designing a good power supply, these factors must be considered comprehensively. Because the power supply is in the entire lamp Is as important as the human heart!
抛 Despite the impact of the financial crisis on the world economy in 2009, the demand for high-power LED power supplies in international markets such as Europe and the United States is still very large, and the corresponding high-end LED product exports are less affected by the financial crisis.
In 2008, the output value of LED application products in China has exceeded 45 billion yuan. LED demonstration applications such as street lamps, LED full-color displays, solar LEDs, landscape lighting, consumer electronics backlighting, signals, and indicators are still the main application areas, but in the domestic market In a prosperous background, the quality of LED products is uneven, and the requirements for driving power are chaotic. It is also a major factor in the reshuffle of LED companies in recent months.
Under the development situation of LED products in the domestic market in full swing, the technical requirements on the current output of LED drive power have been challenged. In order to extend the service life of LED lighting lamps, integrated circuit power supplies are often used, so a constant current source circuit power supply method must be designed. When driving with high current, a high power tube or thyristor device must be equipped, and a protection circuit must be added. The power supply circuit is complex and the failure rate increases. Component costs, production costs, and service costs will all rise. At present, the cost of LED itself is high, coupled with the cost of power supply, which greatly limits the market competitiveness of LED products and the purchase group. The advantages of LED products are greatly reduced, which is another key issue that restricts its development and popularization. .
As far as LED power companies are concerned, the growth rate of the high-power power market around 100 ~ 200W in 2009 will be greatly improved. The LED light source originating from about 100W has a more prominent price-performance ratio compared to traditional lighting sources, and it has quickly formed an industrial-scale LED street light and landscape lighting market.
Conclusion: The main challenges currently facing LED driver power supply companies include:
1. The overall life of the drive circuit, especially the life of key components such as capacitors at high temperatures directly affects the life of the power supply;
2. LED drivers should challenge higher conversion efficiency, especially when driving high-power LEDs, because all power that is not used as light output is dissipated as heat, and the power conversion efficiency is too low, which affects the energy-saving effect of LEDs. Play
3. Dimming LEDs efficiently with a large dimming ratio, while ensuring that the color characteristics are constant at high and low brightness;
4. Reduce costs. At present, in applications with low power (1-5W), the cost of constant current drive power supply is close to one third, which is close to the cost of light sources, which has affected market promotion to a certain extent.
With the development of the domestic LED industry, the national policy level pays more and more attention to the LED industry. Driven by the national policy of “stimulating domestic demand and promoting consumption”, infrastructure projects have started one after another, and the market has gradually recognized LED products. I believe LED Enterprises in the domestic lighting market share will become larger and larger, the LED industry in 2009 market prospects will be broader.

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