In recent years, the market for high-brightness light-emitting diodes (HB- LEDs ) has grown rapidly. LED light efficiency continues to increase, and the average cost per lumen of light output continues to decline, making its application range wider, in addition to the dominant position in applications such as portable device backlights with less than 4 inches of screen size and large stadium displays. It has penetrated into the market of automobiles, medium and large size liquid crystal display (LCD) backlights and general illumination, and the development prospects are very impressive.
Take the general lighting market such as light bulbs and fluorescent tubes instead of recessed lights, street lights and parking lights, work lights (table lamps, cabinet lighting), landscape lighting, billboard text circuits, building lighting, etc. It is estimated that current LED lighting The proportion of applications (or solid-state lighting, referred to as SSL) is less than 1%. In 2008, the market size (SAM) of LED drivers and related discrete devices was only about 688 million US dollars. It is expected that the market size will increase to 1.308 billion in 2012. The US dollar has a compound annual growth rate of 17.4%. Therefore, LED general lighting has become a hot market.
This article aims to explore the different power ranges and different power supply applications of the LED general lighting market, as well as the applicable LED drivers and related components, to help lighting design engineers choose the right component solutions to speed up the listing process.
Different power AC-DC power supply LED general lighting application requirements and solutions
Power supply topologies for different power AC-DC LED lighting applications vary. In applications with power below 80 W, the flyback topology is the standard choice; in energy-efficient applications, the resonant half-bridge dual inductor plus single capacitor (HB LLC) is preferred. ON Semiconductor offers AC-DC LED lighting solutions covering a wide power range. Table 1 lists several typical ON Semiconductor AC-DC LED lighting solutions.
Table 1: Typical General AC-DC LED Lighting Solutions from ON Semiconductor (click the image to see the original image).
From the power rating of the application, AC-DC powered LED general lighting applications include different types of low power, medium power and high power. Low power applications typically range from 1 to 12 W, medium power ranges from 8 to 40 W, and high power applications often exceed 40 W.
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