The fourth generation lighting source

LED highbay light is called fourth-generation lighting source or green light, energy-saving, environmental protection, long life, small size, and other characteristics, can be widely applied in various directions, display, decoration, backlight, general lighting and urban night field. With the excellent performance of LED applications in lighting, backlight, display, and many other market, many IC manufacturers have expanded to the field of LED, engaged in the development of the LED driver solutions. Eight Immortals, recount different IC vendors are selected according to their respective target markets. However, the similarities still exist, in the face of the challenges of the volume, dimmer control, cost, conversion efficiency, the strategy worthy of discussion.
        The primary side feedback become the common choice
        The main function of the LED driver for LED highbay light to provide a stable, accurate current. Traditional LED driver solution using secondary feedback to achieve a precise control of the output current, the LED current through the secondary side of the current sampling resistor measurement, and by means of optocouplers provide feedback. Secondary feedback control will lead to drive cost reduction in the size of the increase and the conversion efficiency. In this case, the primary side feedback common choice for the number of LED driver solutions provider.
        Primary side feedback mode AC / DC control technology is developed in the last 10 years of the new AC / DC control technology, with the the traditional vice edges feedback optocoupler plus compared to the 431 structure, its biggest advantage of eliminating the need for two a chip as well as co-ordinated with the work of a group of components, thus saving the system board space, reduce costs and improve the reliability of the system.

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