High-power or power LED lighting applications, normally the power supply, LED driver, the LED, lens and substrate parts, where the key element is a LED driver, it must provide a constant current output in order to ensure that the LED Blue 150W will not flickering of light, and LED color saturation phenomenon does not occur, it is generally accepted 24V-48V DC input voltage, but there are also some advanced LED drivers can directly accept the 220V mains AC input.
The main design challenges of LED lighting applications, including the following aspects: heat, high efficiency, low cost, dimming flicker-free dimming of a wide range of reliability, security, and eliminate the color cast. These challenges require the use of appropriate power system topology structure, the drive circuit topology and mechanical design can be resolved.
Diodes, Asia Pacific Marketing Director the right after the beam, said: "For designers, the biggest challenge will be to high-efficiency requirements, optical design, thermal management and improve the reliability of certain applications, such as high brightness LED street lights. We now offer a series of LED strip lights solutions covering from 0.1W to 250W. "
"In the application of LED lighting systems, in addition to select the appropriate LED products, a complete LED lighting design must include optical design, thermal design, product design and electrical drive design. LED is a low-voltage devices, high-voltage AC power supply converted to LED use low-voltage constant-current drive will be faced with many challenges "before the ON US semiconductor Chinese District, senior applications manager Zheng were pointed out:" further said that, in order to ensure the advantages of LED lighting, the LED electrical drive must is reliable, high efficiency of, security and low cost for LED lighting applications, you first need to select the correct driver circuit topology. "Semiconductor can now provide all LED lighting solutions from 1W to 500W power range.
In order to quickly promote the take-off of the LED 200W lighting market, National Semiconductor Corporation (NSC) recently targeted a very large incandescent alternative markets, which uses LED lights direct replacement for incandescent lamps in the existing home or other application markets, and launched a a driver for the market directly to the mains input LED chip LM3445.
However, the NSC Asia-Pacific Power Management product marketing manager Wu Zhimin said: "The incandescent lamp has been available for many years, many of the technical standards improved for years, our home lighting system has been also followed many of the technical standards improved for years, situation can not be achieved overnight change over. for example, cooling and lighting angle, the old lamp socket or device is not suitable to be used to install LED bulbs, but in addition to technical issues, cost-effectiveness is also a LED infraredht can not popularity of the biggest reasons the price of incandescent light bulbs and neon of about U.S. $ 0.6-0.7/Klm, but the price of LED lights still up to U.S. $ 40-50/Klm.
As mentioned above, the LED lamps must be installed in the old outlet, the heat is a big problem that must be overcome. But strictly speaking, it can take advantage of the mechanical engineering technology to solve problems, LED systems manufacturer's responsibility is to strive to develop new technologies to maximize the brightness of the LED (ie per unit of power generated by the amount of lumens). Wu Zhimin said with confidence: "We can provide the efficacy of the most efficient LED 400W, to ensure that the entire lighting system heat dissipation to a minimum."