LED lighting has been rapidly developed in the near future, and LED has been widely recognized as a clean and clean light source. LED light source has long service life, energy saving, simple and convenient application, low cost of use, so it will be used in a large number of applications in home lighting. According to the survey of OSRAM Optical Semiconductor in 2008, the annual annual sales of home lighting fixtures is about 500. Billions.
The technology of LED light source is becoming more and more mature, and the luminous lumen per watt is growing rapidly, which makes it reduce the price every year. Taking 1W LED light source as an example, the price in spring 2008 is one-third of the price in the spring of 2006, and will fall to a quarter in 2006 in spring 2009.
The massive market of LED green lamps and the continuous growth and demand for several years will be the super tsunami in the IC industry after the VCD, DVD, mobile phones and MP3s!
The high performance, long life and environmentally friendly performance of LED lamps are widely recognized.
LED high energy saving: DC drive, ultra-low power consumption (single tube 0.03 watts - 1 watt) electro-optical power conversion is close to 100%, the same lighting effect is more than 80% energy saving than traditional light source.
LED long life: LED light source is called long life light. Solid cold light source, epoxy resin package, there is no loose part in the lamp body, there are no shortcomings such as filament light-emitting, heat deposition, fast light decay, etc. The service life can reach 50,000 to 100,000 hours, which is longer than the traditional light source. More than double.
LED is environmentally friendly: LED is a green light source with better environmental benefits. There is no ultraviolet and infrared rays in the spectrum, low heat and no stroboscopic, no radiation, and waste can be recycled, no pollution, no mercury, cold light source, safe touch, is a typical green lighting source.
LED light source working characteristics:
The VF voltage of the LED light source for illumination is very low, generally VF = 2.75-3.8V, and IF is 15-1400mA; therefore, the output voltage of the LED driver IC is VF XN or VF X 1, and the IF constant current is 15-1400mA. The LED light source used in LED lamps has two types of low power (IF=15-20mA) and high power (IF>200mA). The low-power LEDs are mostly used for LED fluorescent lamps , decorative lamps and grille lamps; high-power LEDs are used for Home lighting, spotlights, underwater lights, wall washers, street lights, tunnel lights, car work lights, etc. The power LED light source is a low-voltage, high-current driving device. The intensity of the light is determined by the current flowing through the LED. If the current is too strong, the LED light will be attenuated. If the current is too weak, the LED will be affected. Therefore, the LED The driver needs to provide a constant current power supply to ensure the safety of high-power LEDs while achieving the desired luminous intensity. 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 good driver IC, the advantages of LED lighting cannot be reflected.
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