Reliability is the main appeal of LED lighting power supply
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Posted On :
Dec-28-2010
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Article Word Count :
789
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Everyone knows that LED is energy conservation, environmental protection and long service life, but in face of large scale application...
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Sought-after LED lighting topics are hot from beginning to end . everyone knows that LED is energy conservation, environmental protection and long service life, but in face of large scale application, it had to be delayed time to market because of power life unmatching, lacking reliability and other problems . More and more insiders recognize that should fully exert the LED lighting drive power potential, is one of the key factors of support.
For the LED illumination drive power, present main appeal concentrated in high reliability and high efficiency and energy saving, etc. From local xian ming-tai semiconductor technology limited company general manager xing pioneer according to the present LED lighting drive power explicitly proposes three requirements: first, to have a high reliability, including and LED light-source matching the long life, wide working temperature adaptability (40 degrees - 65, even - 55-85 degrees), and a wide grid adaptive and self-protection property, etc; Second, must be energy efficient, ming-tai Tesemi products efficiency is as high as 95%, far more than in China and the European Union and 91% of primary energy efficiency standards, Third, in current LED products without comprehensive standard cases, LED must satisfy the electrical compulsive standard, especially the EMC of the corresponding GB17743 IEC6100, current harmonic THD GB17625.1-2003 the corresponding IEC61000-3 -2/20 01, this requires the power to have good EMC, IC simplifies PFC/THD.
IWatt company always cooperate with numerous LED lighting enterprise provide power solutions, the company sales vice President baoge zhu Lai accept shoesmag said in an interview, the development trend of LED lighting power should be: high efficiency, high reliability, and the light with the dimmer wide application compatibility. PowerIntegrations marketing vice President DougBailey also believe that all of the customers need to reliable, efficient energy-saving LED drive products.
Of course, there are some other requirements exist, such as power factor correction (IC simplifies PFC), flicker free SCR dimmer, in different input voltage, temperature and light bulb has high precision between driver output, and constant current consistent conduction and shutoff performance. DougBailey said, PowerIntegrations (PI) came device in isolation type (PH) and LinkSwitch - not isolation type (PL) topology structure LinkSwitch - all have these characteristics, depending upon the selected mechanical isolation method and target application of applicable safety rules.
Current market of LED lighting power requirements for application and different, the design requirements and consumer bulb lamps or industrial fluorescent lamp replacement exists quite different. Rohm company argues, LED lighting market for indoor illume bulb type gradually transition to ZhiGuanXing, used for outdoor and streetlights have increased. With high brightness LED to change to improve, LED drive circuit also gradually began to high output such development.
At present, the LED replace type bulb and other new LED lighting is developing very rapidly, the main market tends to from linear LED lighting power supply. International rectifier company (IR) LED departments PeterB. Green points out, offline LED power market mainly divided into high power and low power two parts, probably with 50W for boundary, not including hand-held devices such as low pressure applications.
Based on set molding LED bulbs alternative products mostly using simple, non insulation type step-down voltage stabilizer LED drive circuit. These products are adopted the least components number and the lowest cost, but must also provide enough lumens/each tile, and higher than 0.7 power factor, and standard with the bidirectional thyristor dimmers dimmer ability.
Market cannot meet the performance requirements of products, and is gradually being replaced by the us department of energy "energy star plan (EnergyStarprogram)" the request that underlie the change in one reason.
China LED drive power supply manufacturer facing the main challenge is to comply with government and industry standard, such as efficiency, energy and power factor and TRIAC dimmers of compatible. And industry energy standard is equally important to quality and long-term reliability, and they are the key success factors, because with the traditional lighting solutions, compared to the LED illumination propaganda focus is longer life cycle (bright led rope light). This advantage only when lighting system as a whole its long-term reliability can be accomplished, but it is not exactly. In fact, in many LED lighting products, failure is a common phenomenon, mostly because power failure, not LED of failure.
In the design level, this means OEM must become system hot design experts. Leds offer efficient, but they also produce more than incandescent lamp or energy-saving heat conduction. Because many LED lighting applications enclosed in a small room (led strobe lights), it is difficult to use ventilation to heat dissipation. Without careful thermal design, LED and power drive circuit easily because of high temperature and degradation or permanent failure. From: wholesale LED lights
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Article Source :
http://www.articleseen.com/Article_Reliability is the main appeal of LED lighting power supply_46220.aspx
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Author Resource :
bright led rope light, led strobe lights, wholesale LED lights
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Keywords :
LED lighting power supply, bright led rope light, led strobe lights,
Category :
Internet Business
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Internet Business
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