According to Communications with Selantek solid-state lighting company for the global LED market research data published in 2010, the global lighting market size of 20.2 billion (sets), which accounted for 96 million sets of LED lights. 2011, LED lights will increase to 12.2 billion units, and in 2016 reached 992 million units. LED lights in a variety of applications, ranked the top three cars, traffic lights and signs, respectively, accounted for 40%, 28% and 11%.
At present, LED lighting design challenges
LED lighting design for the current challenge, Fairchild (Fairchild) PCIA lighting business technology expert Brian Johnson summed up in three areas:
A small PCB footprint and BOM costs. LED lamp driver to be more compact; VDD power supply, transformer, input / output / VDD electrolytic capacitors and other components of the unit cost will increase 0.1 to 0.7 U.S. dollars.
Second, life is short. Because the electrolytic capacitor, or hot and humid conditions and low reliability; LED lamp manufacturers boasting 50,000 hours of life, a lot of life without the optimization of power is only 1 to 2 million hours. The current three-year warranty, but should be extended to five years.
Third, high-quality, high efficiency applications, electronic design requirements. High power factor (PF), low total harmonic distortion (THD); Energy Star for more than 5W and commercial applications requiring PF ≥ 0.9, residential applications PF ≥ 0.7. Continuous output current (peak change> 5%); dimming; electrical efficiency of 80% or more.
International Rectifier (IR) LED energy-efficient products Peter Green Manager to add the following points: the forward voltage of Part-to-part changes, temperature changes, negative temperature coefficient, low dynamic impedance, color and color of the conversion.