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Date: 2018-07-26
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LED driver chip market status

日期: 2018-07-26
浏览次数: 23

The price of a single driver chip for LED display is relatively low, but the use of LED driver chips is very large, making the market size of China's LED display driver chips reach 680 million, accounting for half of the market share, ranking first. In 2010, the rapid recovery of notebook computers, communication terminals and the consumer electronics industry, the demand for LED backlights increased greatly, and the large-size LCD TV LED backlight market started and grew rapidly. The use of high-end LED backlight driver chips is also increasing. The increase has made the market size of China's LED backlight driver chips reach 320 million in 2010, accounting for about 1/4 of the market. The market share of LED driver chips for lighting ranks third.

The LED driver chip is developed along with the breakthrough and application of the three primary color technologies of LED chips. Since the invention of blue LEDs based on gallium nitride and indium gallium nitride, after the addition of phosphors to blue LEDs to obtain white LEDs, the emergence of blue and white LEDs has expanded the application of LEDs, making applications such as full color display and LED lighting become may. As the main illumination source, white light requires a large driving current. At this time, the high-efficiency driving module and driving technology are rapidly developing in line with the market trend. The driver chip specially designed for LED applications has been continuously broken in technology, and the application range and The scale continues to expand. In the next few years, multiple advantages such as policy-driven, industry technology path and development trend, and market demand will drive the development of the chip industry. The LED driver chip market has broad prospects.

In 2016, the scale of China's lighting LED market reached RMB 25.9 billion, which was lower than market expectations. The main reason was that the growth rate of international LED lighting demand was not obvious, resulting in a decline in the total export volume of LED lighting in China. However, due to the promotion of domestic demand and the stability of prices, the scale of the LED market in 2016 will still maintain 9% growth. It is expected that the LED LED market will reach RMB 28 billion in 2017 and RMB 36.4 billion in 2020, 2015-2020. The compound growth rate is 9%.

According to the "Announcement" deployment, incandescent lamps will be phased out in 2016, and the import and sale of ordinary lighting incandescent lamps of 15 watts or more is prohibited. It is estimated that the output value of the lighting and electrical industry will be increased by about 8 billion yuan (RMB) and about 15,000 new jobs will be created, resulting in an annual energy saving of 48 billion kWh and an annual reduction of carbon dioxide emissions of 48 million tons. This year, the Ministry of Science and Technology released the "12th Five-Year Plan" for the development of semiconductor lighting technology. Deploy technologies and industries that are vigorously developing LED lighting.

As far as LED driver chips are concerned, the mainstream trend in the future is integration and simplification. Under the trend of small pitch, the driver chip should break through a series of problems such as chip size reduction, relative brightness improvement, small current display uniformity, high reliability, etc. Control circuit integration is an effective measure to solve this problem, integrating more transistors. While improving the performance of the chip, it is necessary to package multiple functional modules in the same chip to realize diversification of the functions of the chip. The simplification is represented by a linear driver chip. The linear chip adopts an integrated solution. The full-chip device, fewer peripheral components, and strong heat dissipation enhance the protection performance. The linear chip is also used in the filament lamp, the bulb lamp, and the ceiling lamp. And the field of intelligent dimming has been more and more widely used.

The DD312 is a constant current driver designed for high power LED applications. The chip contains a constant current generating circuit, and the output constant current value can be set through an external resistor. The switching time of the output channel can be controlled through the enable end of the chip, and the switching frequency is up to one megahertz (1 MHz). The current output response is extremely fast, supporting applications with high gradation changes and high picture refresh rates. Built-in open circuit detection, thermal shutdown, and overcurrent protection make the reliability of the application system greatly improved.

The M8914 is a single-stage Buck PFC controller for LED lighting applications. Higher efficiency is achieved by driving the Buck converter using a quasi-resonant mode. Keep the Buck converter operating for a constant time to achieve a higher PFC. SOT23-6 package, suitable for power <30W.

The LED industry is developing rapidly, and the development of driver chips is also the same. However, behind the situation is a hidden turmoil in the driving industry. The quality of the driver chips is uneven, and it is not effective in terms of performance, safety, electromagnetic compatibility, reliability, etc. Protection. Some may say that this is related to the lack of corresponding standards. But in fact, LED driver development to today, not without standards, but too many standards, but the lack of authority. The above analysis of the current status of the LED driver chip market.

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