Located in Greater China's Global Power Resource Center, Fairchild Semiconductor has developed a complete LED street lighting solution that delivers high efficiency, excellent thermal performance and high reliability to significantly extend streetlight usage time.
The new streetlight solution features advanced critical conduction mode PFC, high efficiency DC-DC conversion and constant current control, and includes parallel or series sub-solutions in the same board layout.
At 220V input voltage, the parallel solution provides 91.26% efficiency from the AC input to the LED side and 92.6% in the series arrangement.
Parallel solution The current of each LED string is independently controlled. Therefore, if one LED string is broken, the remaining LED strings can still work normally.
For the series solution, each LED string has an independent circuit breaker function. If one LED is broken, the remaining LED strings can still work normally.
In addition, if one LED is shorted, the constant current circuit ensures that all other LEDs in the parallel and series sub-solutions are working properly.
This new solution offers exceptional reliability with fewer component counts, powerful protection and high fault tolerance for LED faults. More than 20 components can be reduced in parallel layout and 86 components in tandem layout.
Fairchild Semiconductor uses the active power factor correction controller FAN7930 to perform boost PFC applications under CrCM and the highly integrated fast power switching product FSFR2100 to provide all the functionality needed to build a reliable and robust resonant half-bridge converter.
The program is designed to reduce power consumption and meet the stringent energy efficiency standards that government agencies around the world have introduced in recent years, including Chinese national and provincial agencies, as well as ENERGY STAR's solid-state lighting guidelines, while also responding to consumer and market The increasing demand for more environmentally friendly electronic products.
LED to shoot the light, English name is LED spotlights, it is the most popular energy conservation and environmental protection products, with more and more of lamps and lanterns made of LED as light source, one of the most acclaimed is LED to shoot the light, as compared with other LED lamps, LED lamp price is lower.LED lamp is mainly used for decoration, commercial space, lighting and Building Lighting, etc., with the development and progress of LED technology, the market of LED lamp performance advantage is very outstanding, high purity aluminum reflector, the beam is the most accurate and reflective effect is best;Symmetrical light distribution systems such as narrow Angle, wide Angle and asymmetric etc., and the projector lamp is equipped with a scale plate, people can adjust the radiation Angle conveniently according to the scale.In addition, in order to facilitate maintenance, the LED projector lamp is replaced by a back-up switch.The lighting decoration effect is first-rate, and the LED projection lamp can realize the dynamic effects of gradual change, jumping, color flashing, random flashing, gradual change, chase and scanning.
1. LED spotlights can be driven by low-voltage direct current: it has the advantages of small load and weak interference, and has low requirements on the use environment.2. LED spotlights can control the composition of the luminous spectrum well, so that they can be well used for local or key lighting in museums and exhibition halls.
3. The luminous directivity of LED spotlights is very strong: the luminance attenuation is much lower than that of traditional light sources, and the price of LED spotlights is fairly civilian.
4. The response time of LED spotlights is very fast: at the microsecond level, as long as the switch is on, it will be on immediately without any delay or flicker.
5. The light energy concentration of LED spotlights is very high: it is concentrated in a small wavelength window with high purity.
6. The service life is very long, generally between 50,000 and 100,000 hours, because LED is a semiconductor device, and even frequent switching will not affect the service life.
7. Good environmental protection, LED to shoot the light in the process of production don't add "mercury", also do not need air, do not need glass shell, good impact resistance, good shock resistance, invulnerability to breakage and facilitate transportation, very green, known as "green energy", the LED lamp price.
8. Energy saving, the spectrum of LED spotlights is almost all concentrated in the visible light frequency band, and its luminous efficiency can reach 80 ~ 90%.It is generally believed that the energy-saving of energy-saving lamps 4/5 is a great innovation, but LED spotlights are more than 1/2 energy efficient than energy-saving lamps, which is a greater reform of solid light sources.
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Jiangsu chengxu Electric Group Co., Ltd , http://www.satislighting.com