With the increasing of LED efficiency and cost reduction, LED lighting increasingly become the incandescent light bulb and fluorescent lamp of the perfect substitute. However, due to the LED illumination system is very complex; Across the optics, electricity and heat, etc, therefore, in large scale application, will often appear power life not matching and reliability than problems, which LED advantage can't play. In short, the LED lighting (especially LED street lamp) large scale application is the real driving power supply bottlenecks.

Power Integrations company (hereinafter referred to as PI) LED product marketing manager Andrew Smith said: "as the early compact fluorescent lamps (CFL) technology for initial quality is low and encounter as demand fell, LED the reliability of the street lamp lighting was questionable. A lot of premature failure force the place when the bureau and other customer to reconsider the LED technology. To solve quality problem, LED the main advantages of outdoor lighting will once again to promote market development."

Because LED-drive-tech. HTM "> LED to drive and LED chips and module coordination system, also needed to consider LED module structure design, so the photoelectric LED lighting applications to drive power requirements vary. But overall, the LED illumination for driving power requirements nothing more than high efficiency, high reliability, and the light and the dimmer application compatibility and so on. One, the so-called high reliability include and LED-lights. HTM" > LED light source matching the long life, the wide power grid and self protection to performance, as well as wide working temperature adaptability (40 degrees to 65 degrees, even-55 degrees to 85 degrees).

Especially LED street lamps mainly used in outdoor environment, through years wind rain, LeiMingDianShan bad environment; In south China, the outside temperature of the time could be as high as 40 ℃ ~ 50 ℃; And in the cold north, the outside temperature of the time may be low to-20 ℃ ~ 30 ℃. So LED street lamp power design and manufacturing technology is more to pay attention to quality problems.

"Most of the street lamp fault can be attributed to the power failure, street lamp face special challenges, most of the design of the application of the traditional power challenge is not exist. High temperature environment of harsh conditions (temperature over 100 ℃ to circuit boards), plus the source and load (LED) of the close, make the standard adapter adjacent technology can't gather together effect. In addition, telecom converter is used for dealing with the high temperature environment of high efficiency in the street lamp application method, only partly effective." Andrew Smith says: "the long service life, high temperature environment power need to adopt the special design technology and the topological structure, can cause the power supply in work normally under harsh environment. The lamps manufacturers often can't be accurately determine the applicability of the power supply, the wrong choice technology will eventually lead system fault early."

He points out that at present a lot of used in outdoor lighting relies heavily on the big power of the aluminum electrolytic capacitor, yet for to harsh environment in work in the power of the power supply for conversion electric circuit, such capacitance effect is not good. PI extremely cost-effective technology without electrolysis electricity may be other short life components (such as light coupling), so as to improve the reliability of the external lighting scheme.

Andrew Smith stressed: "PI control IC can help power designer complete modular design, drive LED lamp, with parallel of 90% or more of the work efficiency, without aluminum electrolytic capacitor. In addition, PI also provide highly integrated, high frequency resonant converters, through the will power scheme when light load of efficiency, rising to 92% above to reduce the stress of power."
Die casting street light on https://www.diecastingmanlighting.com/product/led-street-lighting/