In order to create a smart lighting system with both energy saving and high efficiency, MCU and dimmable drivers are used for environmental sensing. High-performance dimming has become a popular design trend in LED lighting systems. In addition, optical and thermal simulations Is to ensure the reliability and safety of LED products indispensable to the development process.
Circuit design and simulation system is key to the success of the two intelligent LED lighting system, wherein the circuit design if the added micro- controller (the MCU), not only the weather monitoring devices and returns instant LED abnormal conditions, but also the lighting device Group control to adjust the energy to make the lighting system more intelligent; and to enhance the stability of LED light source, the dimming driver into the circuit design, you can solve the problem of light flashing and improve energy efficiency.
On the other hand, it is very important to verify the feasibility of the product through the optical and thermal simulation process. This not only ensures product safety, but also accelerates the product development schedule and enhances market competitiveness in the simulation process .
Achieve intelligent lighting system MCU role eat
With the increasing popularity of the use of LED, the application is also more and more diverse, of which the wisdom of lighting business opportunities more by the industry expectations. In order to create LED lighting system, the MCU can be used to automatically adjust the brightness, automatically change the color, sense the environment, and control the group system to enrich the application of LED lighting and improve the energy efficiency.
Zhu Shaosen, senior application engineer at Infineon, said the MCU will allow LED lamps to realize smart lighting systems that will fully improve energy efficiency and enrich LED applications.
Lack of control and changes in the past LED lamps, even if the LED is more durable than traditional halogen lamps, incandescent lamps, but in the long-term use, LED light output will be affected by the aging and temperature decline, resulting in the lamp device easily Damage, so that a substantial reduction in reliability, and can not dimming defects also caused the inefficient use of energy, combined with the above factors will eventually lead to shortened LED life, while the application, but also because of the light can not change is more tedious.
Zhu Shaosen further pointed out that in order to achieve dimming control, color conversion and high efficiency use of energy and other goals, LED lamps into the MCU can make indoor lighting, outdoor lighting, decorative lighting, and emergency lighting have more application changes, such as control LED lights In one day, the brightness is adjusted according to different time periods to save energy, remote group control through the digital addressable lighting interface (DALI) in the MCU, and the LED device is still monitored at any time to inform the project Rapid maintenance personnel, these new applications are so that LED lights are no longer just open and closed it, but also have more flexible use.
It is understood that Infineon LED market to seize the wisdom of illumination, were introduced XC835 and XC836 two MCU, the two MCU in addition to the pin number and size of the different, the biggest difference is that XC836 has support for DALI, LED lamps can do Wisdom remote control system, and XC835 is not supported. In addition, both support touch control and feature high heat resistance (150 ° C) and high reliability. At present, this series of MCU is mainly used in entertainment decorative lighting market common T4, T8 and other small and medium-sized fluorescent tubes and bulb.
For the entertainment decorative lighting market, due to the colorful entertainment content, not only the wisdom of automatic dimming, the life of the LED lighting, lighting efficiency and lighting stability is quite demanding, so dimming driver to solve the above The problem began to be designed into the lighting system.
LED lighting spell efficiency adjustable light drive behind
Governments around the world have become tougher on energy-saving requirements, driving demand for dimmable LED lighting. To achieve high-performance dimming and to solve flicker problems, Texas Instruments has released two highly integrated phase-dimmable AC pairs DC (AC-DC) LED lighting driver to fully meet the dimming needs of lamps such as Retrofit Bulb, Ballast, Downlight and Spot Light.
Texas Instruments Asia analog products market development application of advanced power applications Xiao Yizhou said the built-in dimmable power driver IC LED will soon be able to fully replace the dimmable conventional light bulbs.
Although the traditional light bulb can also be dimming, but more power and short life, resulting in dimmable conventional bulbs must be frequently repaired. Introducing dimming power LED driver IC, not only take into account the LED 80% energy saving than the traditional light bulb, the service life of at least 20,000 hours of the advantages of the characteristics, more dimming, improve energy efficiency, speed up Energy-saving LED lighting completely replace the traditional light bulb.
To plug the energy-efficient LED lighting market, Texas Instruments has introduced TPS92070 / LM3448 dimmable series of programs, the high current accuracy of the characteristics of the current customers can accurately define the upper and lower limits, eliminating the need for customers to constantly correct the time and cost Because of its high-performance structure, can reduce the surrounding parts that support this driver IC, further reduce customer's cost.
Xiao Yizhou further pointed out that at present a series of Texas Instruments dimmable driver IC are mainly exported to Japan, Europe and the United States, and other countries due to different safety standards, the required driver IC specifications are not the same. For example, TPS92070 because of its structural design for isolation, high security, in line with US regulatory requirements, Japan's main shipments are non-isolated design of the LM3448, with or without isolation of the design, the impact on the overall cost of LED lamps about 2%, all depends on customer needs.
Xiao Yizhou said that under the requirements of the relevant energy-saving laws and regulations, currently Japan, Europe and the United States and other developed countries have adopted a large number of imported LED driver dimmable LED lamps, and developing countries such as mainland China, because there is no relevant regulatory requirements, The use of low-cost non-dimmable LED lighting.
As for Taiwan, although there is no relevant regulatory requirements, but lighting manufacturers have imported dimming driver IC, the application of the market is still mostly entertainment-based lighting market, general indoor lighting, outdoor lighting and emergency lighting are not beginning to popularize, If the future energy-saving laws and regulations have further developed, I believe that energy-saving LED lighting will be more prevalent.
In addition to the advantages and disadvantages of the choice of dimmer architecture, in order to accelerate the time-to-market of LED products and reduce the overall development cost, optical simulation and thermal simulation are used to verify the feasibility of the products before the products are officially opened for mold production. An important weapon to defeat the enemy.
Accelerated LED development has skim step
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