LED lighting efficiency adjustable light driver1

Governments are increasingly demanding on energy conservation, stimulating dimmable light-emitting diodes (LED) Lighting needs to be warmed up. In order to achieve high-performance dimming and solve the flicker problem, Texas Instruments recently released two highly integrated phase dimmable AC-to-DC (AC-DC) LED lighting driver, can fully meet the modified bulb (RetrofitBulb), LED ballast (Ballast), Downlight (Downlight)And Spotlights (SpotLight)Such as the dimming requirements of lamps. Texas Instruments (TI) Xiao Yizhou, senior application engineer of power application products for analog products market development in Asia, said that although traditional bulbs can also be dimmed, they consume more power and have a short service life, resulting in traditional dimmable bulbs that must be repaired frequently. The LED lamp with dimmable power supply to drive IC not only takes into account the advantages of LED compared with traditional bulbs, such as 80 power saving and at least 20 thousand hours of service life, but also can carry out dimming and improve energy efficiency, accelerated energy-saving LED lighting completely replaces traditional bulbs. In order to insert flags into the energy-saving LED lighting market, Texas Instruments has introduced TPS92070/LM3448 dimmable series Scheme. Its high current accuracy can accurately define the upper and lower limits of current for customers, thus saving the time cost of continuous correction for customers, and because of its high-performance structure, it can reduce the surrounding parts supporting the drive IC and further reduce the cost of customers. Xiao Yizhou further pointed out that a series of dimmable drive ICS of Texas Instruments are mainly sold to Japan, Europe and the United States, and the required driver IC specifications are different due to different safety standards. For example, TPS92070 has high safety due to its isolated structural design, which can meet the safety requirements of the United States. Japan's main shipment is LM3448 with no isolation design, and the impact on the overall cost of LED lamps with or without isolation design is about 2, depending on customer needs. Xiao Yizhou said that under the requirements of relevant energy-saving regulations, Japan, Europe, America and other developed countries have adopted a large number of LED lamps with dimmable driver IC, while developing countries such as mainland China, since there is no relevant regulatory requirements, the low-cost LED lamps without dimming function are used. As for Taiwan, although there is no relevant regulatory requirements, lighting manufacturers have introduced dimming drive IC, and most of its applications are still dominated by the entertainment lighting market, general indoor lighting, outdoor lighting and emergency lighting have not begun to popularize. If energy-saving regulations are further formulated in the future, it is believed that energy-saving LED lighting will be more popular.