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LED power supply manufacturers enter the field of general lighting
With the rapid rise of the civilian LED lamp market in the past year, many drive power manufacturers and IC semiconductor companies have gradually expanded from the commercial application field to the LED general lighting market. However, in the face of such market demand for more stringent product prices and reliability, many manufacturers in the upstream and downstream of the industry chain have clearly felt the pressure from cost control. At the power supply end, the price war in the low-power and non-dimming markets is becoming more and more hot, and the homogenization of driving products is serious. To break through the industry competition, it is necessary to focus on the design elements of the three LED power sources of cost, space and efficiency. Continuous innovation in all aspects, combined with the current development trend of dimming/toning, high reliability, and intelligent demand in the mass consumer market, strive to improve the quality of lighting power and the added value of lighting products. The driving scheme has entered the two-polarization development into 2014. LED bulbs have become the leader in the rapid development of the consumer LED lighting market. In the bulb lamp power supply scheme, along with the popularization of plastic-coated aluminum heat-dissipating materials in recent years, The bulb scheme is gradually turning to a non-isolated architecture that is less costly and more efficient. Another thing worth noting is that the market demand for flat panel lights is also rapidly expanding. In the same size, the brightness of LED panel lights is 1.5 times that of grid lights, and the wattage is only 1/2 of the grid lights. The structure is exquisite and the light is uniform, so it is favored by the market. At present, the power of the panel lamp has been expanded from 12~24W to 40W, and the cost of the solution is significantly reduced. For the driver IC of the bulb lamp, the biggest difficulty is to improve the increasingly mature 5-12W solution, especially to solve the problem of high PF (power factor) non-stroboscopic, while reducing BOM cost and increasing protection. Features. Yi Yangbo, deputy general manager of Wuxi Xinpeng Microelectronics Co., Ltd. pointed out that in the development of driver ICs for LED panel lights, the focus is on how to make the BOM cost of the 24-40W larger power scheme more streamlined. It is understood that Xinpeng Microelectronics currently introduces a series of 3-41W built-in MOS non-isolated buck driver IC products, including 8 chips and dozens of system solutions to support the development and application of various LED lamps. [img]/uploads/allimg/140507/22-14050FP13W50.jpg[/img] In fact, summarizing the demand characteristics of LED driver solutions at the current stage, it shows a trend of polarization with low price and performance. In response, Jiang Jialiang, marketing manager of AC-DC power management for ON Semiconductor Applications, said that one direction is the expanding mass market demanding low-cost solutions, ie no power factor correction (PFC) is required, using primary-side regulation (PSR). ) type of LED driver with integrated low-cost transistors; and the other direction is for applications that require high quality, control and superior user experience, offering a high power factor solution with digital dimming and robust security, and A fault tolerance feature is required. In technology development, it is compatible with thyristor dimming, cost-effective stroboscopic solutions, and intelligent lighting are currently three key directions. Wang Dong, senior product manager of power supply and power drive product line of Hangzhou Silan Microelectronics Co., Ltd., said that the European and American markets generally require LED power products that can support thyristor dimming. Due to the wide variety of thyristor dimmers, different guides The angle of the corner, the sustain current, and the interference generated during dimming are more likely to cause the LED to flicker. Therefore, the compatibility of the thyristor dimming driver scheme is very important, especially the driver IC capable of 100-compatible thyristor dimming. Secondly, although LED lighting can solve the strobo problem now, the cost of the two-stage solution is relatively high. The strobo-free scheme requires both low cost and high performance, and needs to make breakthroughs in the system architecture. Intelligent lighting such as dimming/coloring and wireless dimming is also a very popular application in the near future, and manufacturers are working hard to develop a product solution with excellent price/performance ratio.