LED lighting has been developed by leaps and bounds recently, and LED has been widely recognized as a green and clean light source. LED light source has a long service life, energy saving, simple and convenient application, and low cost of use, so it will be widely used in home lighting. According to the survey statistics of Osram Optical Semiconductor in 2008, the global annual shipment of household lighting lamp sockets is about 500 billion.
The technology of LED light source is becoming more and more mature, and the luminous lumens per watt is increasing rapidly, prompting its decreasing price year by year. Taking 1W LED light source as an example, the price in the spring of 2008 is one third of the price in the spring of 2006, and in the spring of 2009, it will drop to a quarter of that in 2006.
The massive market of LED green lamps and the continuous and stable growth demand for several years will be the super tsunami of the consumer electronics market in the integrated circuit industry after VCD, DVD, mobile phone and MP3!
The superior performance of LED lamps and lanterns with high energy saving, long life and environmental protection has been widely recognized.
LED high energy-saving: DC drive, ultra-low power consumption (single tube 0.03W-1W) electro-optical power conversion is close to 100%, the same lighting effect saves more than 80% energy than traditional light sources.
LED long life: LED light source is called long life lamp. Solid cold light source, epoxy resin encapsulation, no loose parts in the lamp body, there are no shortcomings such as easy burning of filament, thermal deposition, fast light decay, etc. times more.
LED is environmentally friendly: LED is a green light source with better environmental benefits. There are no ultraviolet and infrared rays in the spectrum, low heat and no stroboscopic, no radiation, and the waste is recyclable, no pollution, no mercury element, cold light source, safe to touch, and belongs to a typical green lighting source.
LED light source working characteristics:
The VF voltage of the LED light source for lighting is very low, generally VF = 2.75-3.8V, IF is 15-1400mA; therefore, the output voltage of the LED driver IC is VF X N or VF X 1, and the IF constant current is 15-1400mA. There are two types of LED light sources used in LED lamps: low-power (IF=15-20mA) and high-power (IF>200mA). Low-power LEDs are mostly used for Led fluorescent lamps, decorative lights, and grille lights; Home lighting, spotlights, underwater lights, wall washers, street lights, tunnel lights, automotive work lights, etc. Power LED light source is a device driven by low voltage and high current. Its luminous intensity is determined by the current flowing through the LED. Too strong current will cause the attenuation of LED light, and too weak current will affect the luminous intensity of LED. The driver needs to provide a constant current power supply to ensure the safety of high-power LED use and achieve the ideal luminous intensity at the same time. In the field of LED lighting, to reflect the characteristics of energy saving and long life, it is very important to choose a good LED driver IC. Without the matching of a good driver IC, the advantages of LED lighting cannot be reflected.
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