More lines near 2011 , as the target market for the European depot , the time limit means ECE R87 practiced approaching . Back in 2008 the European Union has announced that since the beginning of February 2011 , new cars, small trucks equipped with daytime running lights are required (DRL), Other trucks , buses will also be equipped with effect from August 7, 2012 . Audi 's A8, R8 and A4 series are equipped with led high bay light for sale , from the famous car manufacturer actively follow up action to promote daytime running lights look , LED adoption rates highest in the European Union is clearly a move will further accelerate the growth of automotive LED market .
Although the price compared to conventional LED lighting is still not civilians, but the deep pockets of the automotive industry is not bad money. As a high-end luxury car is the quality of the soul . LED with long life, low power consumption successful entry into the automotive market. According to the U.S. Department of Energy statistics , LED service life is 20 to 25 times that of traditional light sources , 10 times longer than halogen lamps . Compared with traditional light sources , 3 to 4 times the same power LED lumen output than ordinary light bulbs, 2 to 3 times higher than halogen lamps. Use LED also helps improve fuel economy , reduce emissions of carbon dioxide. With daytime running lights , the ordinary light bulb with carbon dioxide emissions per kilometer for the 1.2g, LED decreased to 0.58g.
As LED technology continues to mature , the LED used in the automotive industry dashboards, interior ambient lighting had hundreds of times , LED is gradually captured the brake lights, fog lights , beam lights , high beam , daytime running lights and adaptive headlights ( AFS) and other vehicle signal indicator , headlight illumination. Automotive lighting using LED certainly of great benefit , but there are still many aspects of system design problems to be overcome. Drue Freeman , vice president of sales and NXP Automotive Electronics Division pointed out that the global market challenges LED lighting is used in the vehicle requires integrated, flexible and network drives.
Typical automotive lighting architecture relying on the body control module to achieve control of lighting the traditional lamp program instruction execution requires only one switch body control module , the control circuit is relatively simple. Once turned to LED lighting solutions , lighting control circuit immediately become complicated. The color temperature of the LED , the output flux and temperature are closely related , as the need to use MCU control center, the real-time temperature adjustment of the signal light and the brightness of LED based on the collected information and feedback led to the body control module, thereby increasing the pressure regulator , signal conditioning, temperature feedback , short circuit protection , electromagnetic filtering and other electronic devices. From cost considerations , compared to the traditional lighting of the driver circuit, the higher cost of the LED structure ; From the system design point of view, potentially increasing the risk of a complex circuit systems , electronic components also will increase the difficulty of troubleshooting .
Therefore, improving the LED lighting control module integrated chip occupies only reduce board space by reducing the amount of circuit elements also help to improve system reliability , reduce system costs.
NXP introduced fully integrated highly flexible type of driver chips ASL1010NTK and ASL1010PHN incorporates many core functions, such as direct LED temperature feedback , LED fault detection, internal pulse-width modulation (PWM) and short circuit protection. With this compact chip without external MCU can build LED lighting control circuit. Further, in the process of conducting current input ripple current is evident in the performance of the LED , typically by filter avoids the ripple current of the LED , the solution effectively eliminating the ripple current to avoid the use of external filters, greatly reduce external components required for the drive circuit . Drue Freeman gives the reference design , the chip with 11 external components can achieve the same LED driver solution requires more than 20 elements in order to achieve the circuit functions.
ASL1010NTK 8 -pin version , 3 × 3mm led high bay light for sale can be integrated on the same printed circuit board , ASL1010PHN for the same series of 16-pin version , containing direct input graded resistance and increased short-circuit protection features to prevent connections errors such as damage to the LED. Both products will be launched in December this year, the first batch of samples, formally put into production next year .
LED has been widely used in automotive lighting, even the hard nut of the headlights also have the courage to eat crab manufacturers began using LED. However, the number of different car LED lighting applications , lighting module uses different drive circuit is also different . Lighting control devices require more powerful, more flexible program to quickly import LED design , give full play to the advantages of LED energy saving . The system NXP introduced solutions can support from 1 to 20 LED series , the output voltage range of 6V ~ 60V, can support different vehicle platforms , including hybrids.
In addition, different LED manufacturers, different characteristics of the LED are also differences between batches , and the LED will drive forward characteristic steep little change in voltage caused by the strong fluctuations of the drive current . Thus , LED manufacturers must be based on LED color, brightness divided into different levels , each level were previously required by the design and optimization of the LED driver circuit . It is not difficult to understand LED lighting industry appears fixed to a particular procurement lock-in effect of the LED manufacturer . NXP time the launch of ASL1010 PHN (16 -pin version ) is expected to LED lighting relaxed, graded resistance which can be assigned according to the characteristics of the different LED drive circuit in order to achieve flexibility , the system manufacturers to design gives more freedom when purchasing LED lights degrees.
Due to the current limitations of LED technology , LED photoelectric conversion efficiency to be improved, the loss of energy is released as heat manner , resulting in LED ambient temperature is too high and thus lead to a serious problem of bad light , even worse , LED life and therefore has shrunk dramatically . Power consumption of large headlights , the most prominent thermal issues , which is still difficult to popularize LED headlamp crux . And by the temperature feedback ASL1010PHN ASL1010NTK and combined PWM regulator current flowing through the LED to prevent LED overheating.
Both products are for automotive LED lighting driver NXP introduced the first product , a veteran automotive electronics supplier NXP blood flowing before the split gene Philips Lighting , I believe he will not stop there for the planning of automotive LED lighting. Drue Freeman revealed , NXP for automotive LED driver chips have long-term planning in the near future will form a light for low current driver integrated power switch , an integrated bus interface (CAN \ LIN interfaces ) , and drive multi-channel for driving lamps effect. The most exciting thing is the NXP led high bay light for sale integrated pushed to a new height - no sensor temperature sensing , when the temperature of the LED driver chip feedback resistor can be perceived without LED temperature.
More info you can visit:http://www.lead-lighting.com/products/sid22-1.htm
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