At present, countries and regions around the world have begun to ban the use of incandescent lamps. Under the influence of the policy drive and the long-life effect of LED lights, LED lighting entered the year of explosion in 2013, and the ushered in after the outbreak is bound to be a gradual decline in the market, according to the market share report of the market research organization HIS. The sales volume of light sources has declined year by year since 2015. The use of incandescent lamps has been completely banned in countries and regions around the world (see Table 1 for details). Table 1: Global incandescent lamp disabling plan Under the influence of the policy drive and the long-life effect of LED lights, LED lighting entered the year of explosion in 2013, and the ushered in after the outbreak is bound to be a gradual decline in the market, according to the market share report of the market research organization HISResearch. The sales volume of light sources has declined year by year since 2015. (See Table 2 for details) Table 2: IHS Lighting Market Share Report According to a report released by IMSReserch in April 2012, the price of LED lights tends to be lower than $30 in 2009, and will break through the $5 mark around 2017. The popularity of LED lamps depends on the speed at which their prices fall, and 40% of the cost of LED lamps is spent on driving control circuits, so the cost reduction of control circuits, including LED driver ICs, is critical. Correspondingly, the cost of the drive control circuit is expected to decrease by 36% between 2013 and 2015. Although the LED driver power supply has made a breakthrough in technology, the cost has been maintained at around 200 yuan. If the sales price is less than 400 yuan, it is basically a loss state, while foreign manufacturers such as Philips have the lowest sales price of 180 yuan. With the increase in labor costs, rent, marketing and office costs, LED drive power supply price reduction is quite difficult, many companies have to fill the cost pressure from technology and design. Simplify topology Reducing the price must optimize the structural design while continuously upgrading the technology, and minimize the number of IC components used. In the 9th LED General Lighting Drive Technology Seminar held on November 25, Guo Chunming from PI pointed out that the reduction The cost of LED bulbs requires changes in LED driver technology. In the report, Guo Chunming pointed out that with the advancement of LED drive technology, the conversion from two-pole driver to single-stage driver technology can reduce the cost requirement of the driver, and the choice of the available topology of the currently available LED driver is even more There is a tendency to use non-isolated drives. He also mentioned that using a buck converter in a topology is small, uses low drain-source voltage stress, and uses the fewest number of filter components, so it has the advantage of high efficiency and optimal EMI performance. Compared with the topology of flyback and unipolar PFC combined with constant current flyback, the cost is the lowest. Guo Chunming also listed the requirements for the lowest cost lamp driver, such as the use of the most likely small heat sink to achieve high efficiency, input high voltage and low voltage, all need to meet the European Commission's environmental protection directive and ENERGY STAR consumer lighting requirements Use buck and buck-boost topologies and the simplest possible EMI filter circuit to achieve the lowest component count, use the fewest number of LEDs to meet the minimum brightness standard and reduce the temperature stress of the heat sink to achieve the production process Guaranteed output constant current. Reducing the cost of LED drivers through topology is only optimized in terms of design, and strict control of specifications is a key factor in ensuring product quality. High-efficiency drives can be realized with simple settings. The specifications must be accurately grasped. Excessive specification design will lead to an increase in product cost. In terms of assembly cost savings, functions can be integrated to reduce board space. Achieve; and use the best design to meet the needs of consumers with minimal safety margin. High voltage linear constant current technology The high-voltage linear constant current power supply has no magnetic components such as transformers, and there is no electrolytic capacitor, which can save one-third of the cost of the general switching constant current power supply. Because of the simple structure of the system, only a few peripheral components are needed, which is suitable for volume and cost. System, and with the advent of HVLED lamp bead technology, non-isolated high-voltage linear constant current LED drive power technology has become a new hot spot for LED light source drive. Professor Yan Chongguang from the Shanghai Institute of Microelectronics, Peking University also demonstrated the HVLEDs+ high-voltage linear constant-current driving integrated photoelectric engine in the LED general lighting driving technology seminar: the driving power chip and the LEDs are placed on the copper-clad aluminum substrate. On the same side, it facilitates the automated production of SMT. The power supply has no transformer and no electrolytic capacitor, and the production cost is low. In the high-voltage linear constant current scheme demonstrated in the field, there is no magnetic component, no EMI filtering, and built-in high-voltage power tube, which can be used to design and produce integrated photoelectric engine. However, this technology also has its limitations, and it has not yet been able to solve the problems of stroboscopic, PF, voltage regulation and other issues to be improved and solved. 40152 17Ah 3.2V Lithium Ion Battery Lithium Solar Batteries,Panasonic Lithium Ion Battery,Hw40152L 17Ah Lifepo4 Battery,Hw40152S 17Ah Lifepo4 Battery Zhejiang Xinghai Energy Technology Co.,Ltd , https://www.headwayli-battery.com