LED power supply manufacturers develop to general lighting market

With the rapid rise of the civil LED lamp market in the past year, many power supply manufacturers and IC semiconductor companies have gradually expanded from commercial applications to the LED general lighting market. However, in the face of more stringent requirements for product price and reliability in this market, many manufacturers in the upstream and downstream of the industrial chain have clearly felt the pressure from cost control. At the power supply side, the price war in the low-power and non-dimming market is becoming increasingly white-hot, driving the homogenization of products to be serious, and breaking through the dilemma of competition in the industry, we must constantly innovate in all aspects around the design elements of cost, space and efficiency of LED power supply, combined with the development trend of the current mass consumer market's demand for dimming/color mixing, high reliability, intelligence, etc. , efforts will be made to improve the quality of lighting power supply and the added value of lamp products. The driving scheme is developing towards polarization. Entering the 2014 S, LED bulb lamps have become the leader in the rapid development of the consumer LED lamp market. In the power supply scheme of bulb lamps, with the popularization and promotion of plastic-coated aluminum heat dissipation materials in recent years, the bulb lamp scheme is gradually turning to a non-isolated architecture with less BOM cost and higher efficiency. Another noteworthy thing is that the market demand for flat panel lamps is also expanding rapidly. Under the condition of the same size, the brightness of LED flat panel lamps is 1. 5% of that of grid lamps. 5 times, the wattage is only 1/2 of the grid lamp, and the structure is exquisite and the light is uniform, so it is quite popular in the market. At present, the power of flat panel lamps has increased from 12 ~ 24W expanded to 40 W, and the cost of the scheme decreased significantly. For the driver IC of bulb lamp, the big difficulty is to mature 5- The 12W plan is more perfect, especially to solve high PF (Power factor) No stroboscopic problem, reduce BOM cost and increase protection function. Yi Yangbo, deputy general manager of Wuxi Xinpeng Microelectronics Co. , Ltd. pointed out that in the development of driver IC for LED flat panel lamps, the focus is how to put 24 -? The BOM cost of the 40W higher power scheme is more streamlined. It is understood that Xinpeng Microelectronics has launched a series of 3- 41W built-in MOS non-isolated Buck drive IC products, including 8 chips and dozens of system solutions to support the development and application of various LED lamps. In fact, summarizing the demand characteristics of LED driver schemes in the market at this stage shows a polarized development trend of low price dominance and performance dominance. In this regard, Anselme semiconductor application products department exchanges- Jiang Jialiang, marketing manager of DC power management, said that one direction is that the expanding mass market requires low-cost solutions, that is, power factor correction (PFC), Using the primary end voltage (PSR) Type of LED driver and integration of low cost transistors; The other direction is to provide high power factor solutions for applications that require high quality, control and excellent user experience, and are equipped with digital dimming and strong security guarantees, and require fault tolerance characteristics. In terms of technology development, it is compatible with SCR dimming, cost-effective no-stroboscopic solution, and intelligent lighting are currently the three key directions. Wang Dong, product manager of power supply and power drive product line of Hangzhou Shilan Microelectronics Co. , Ltd. , said that LED power supply products that can support Silicon controlled dimming are generally required in European and American markets. Due to the large variety of silicon controlled dimming devices, different conduction angles, maintenance current and interference generated during dimming are all more likely to cause LED lamp flicker, so the compatibility of SCR dimming drive scheme is very important, especially the driving IC That Can 100 compatible with SCR dimming. Secondly, although LED lighting can solve the stroboscopic problem now, the cost of the two-stage scheme is relatively high, and the stroboscopic-free scheme should not only take into account the low cost, but also provide high performance, A breakthrough in the system architecture is required. Intelligent lighting such as dimming/color mixing and wireless dimming is also a very popular application in the near future. Manufacturers are working hard to develop product solutions with excellent cost performance.