Choose low-power LED lighting applications drive the factors to be considered

Choose low-power LED lighting applications drive the factors to be considered

LED light main function is to limit the current range of work conditions, regardless of changes in input and output conditions. The application of design constraints faced by a variety of conditions, such as energy-efficient (low loss), cost-effective, wide environmental conditions, high reliability, flexibility, compliance with electromagnetic interference (EMI) and harmonic content and other aspects of the standards, can be modified to have There are applications and to use traditional control methods work.

For low-power LED applications select the appropriate drive is not easy, need to take account of different factors. For example, commercial and residential market for LED lighting in the operating temperature, when using a long, performance and "Energy Star" and other industry standard requirements are not the same. In addition, the light bulb replacement applications, there are unique challenges, such as the LED power supply and drive the heat restrictions, size is limited and compatible dimming technology.

LED general lighting on the applicable standards, mainly the United States "Energy Star" requirements of the power factor correction (PFC) standard and the European Union of Electrical and Electronics Commission (IEC) of the total harmonic distortion limits. Among them, the "Energy Star" V1 version of the standard LED lighting lamps with PFC, suitable for embedded lights, cabinet lights and lamps, and other specific products, but has nothing to do with the power level. This standard requires the application of residential power factor (PF) greater than 0.7, and commercial applications is higher than 0.9. The standards are voluntary standards, implemented in September 2011. The "Energy Star" whole-LED bulb light 1.1 standard was in August 2010 entered into force, requiring input power higher than 5 W lamp power factor higher than 0.7.

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