“DOB technology is rapidly becoming the new choice for LED lighting applications, although not as SMD or other conventional forms of penetration so fast, but it must be a place, the next few years, DOB will reach more than 20% market share.” Easy US-light Executive Vice president and technical Director Liu Guoxu mentioned in his speech.
DOB, is based on the high-voltage AC drive modules integrated DOB light, it attracted the attention of many designers. DOB is not actually new, a few years ago have begun to enter the international manufacturers, and mass production, including Osram, Samsung, LGIT have launched their products.
Liuguo Xu said in his speech, efficient and high-voltage LED driver IC elements are constructed of DOB. LED drivers account for about 20% in lighting costs, not only affects the cost, but also affect efficiency, but also determines the life of the LED lamp.
Traditional AC-DC Driver topologies there are many, such as isolated driver with the device, large volume, assembly complexity, high cost, stability and security is good. Other ways have different structures, including the choice of Buck-Boost configuration, it requires a large capacitance and inductance element. It is relatively inexpensive RC Buck power, low cost, but low reliability.
Direct AC from topology point of view, many packaging manufacturers have introduced AC LED or DOB, traditional anti-parallel structure, mixed bridge structure, but also the use of an external bridge, light and easy to use SBC AC linear drive. Compared with the conventional AC-DC converter (switching power supply), AC linear drive can be connected directly to the mains, no external circuit, very compact, very easy to implement integrated, adjustable light, and very flexible, longer life, because it does not contain electrolytic capacitors, the extra space can be used to full cooling, lower cost, low component count, assembly costs are low. With a large number of driver chip production, the overall costs will fall significantly.
Liu Guoxu think, DOB provides new flexibility for lighting, if appropriate AC design, can solve the flicker problem. Since DOB simplicity and integration of different sensors connected to the gateway, the future DOB in the field of intelligent lighting can account for a place.
In addition to DOB, the Liuguo Xu also talked about other technology trends, for example, high CRI, high luminous efficiency LED technology is a breakthrough (narrow spectrum red phosphor or quantum dots into a key); health and artificial lighting efficiency energy saving substituted, a new market demand driven; intelligent lighting faster than imagination, and from everyday life is getting closer; silicon LED national Science and technology invention award, the industry once again become concerned about the hot; CSP packaging technology to become hot from the backlight and flash, start applying to lighting.
On LED market trends, Liu Guoxu summed up five points: First, LED prices continue downward, but the decline has slowed down, the quality gradually returning, as concerns; Second, the upper and middle reaches capacity continues to increase, the greater the larger; Third, cross-border mergers and acquisitions and overseas overwhelming; Fourth, emerging markets become hot pursuit; five market segments into a new opportunity (UV, plant growth, visible light communication, etc.).
Finding electronic components, www.oemsemi.com is a specialized web for obsolete and hard to find electronic components,most of components types found at our web, such as: 2SD466 and SS2B003, visit our website for more components which your need to buy.
