To meet the increasingly stringent product requirements of the home LED lighting application market, the new generation of off-line LED drivers feature electrical isolation, high efficiency, power factor correction and Triac dimming, and provide well-regulated current to maintain consistent brightness. At the same time, various protection functions also improve system reliability. Home LED lighting market will accelerate growth LED lamps can not only replace high-pressure sodium lamps, halogen lamps and incandescent lamps, but also replace energy-saving fluorescent lamps (CFLs) and fluorescent lamps in some fields. LED commercial lighting will grow rapidly and be widely adopted, while 2012 is a key year for home LED lighting. In commercial buildings, lighting typically accounts for 25 to 40% of total energy use, so it is not surprising that commercial applications have begun to switch to LED lighting. Since such applications require high intensity, long-term lighting, the economic return from saving energy is relatively short-term. In addition, the LED accessory has a long life, thus greatly reducing the replacement cost of the LED lamp. The replacement cost includes not only the cost of the lighting fixture itself, but also the labor cost of hands-on replacement, which is usually high in some applications, such as the disassembly and assembly of high-end lighting applications, which require professional-level labor costs. Overall, from the perspective of most consumers, GM's home LED lighting is still too expensive, but in the future, with the decline in the price of LED accessories and wider supply of LEDs, the lighting market will also appear in the residential sector. growing up. Most analysts expect the residential market to accelerate growth after 2012. LED driver IC design considers multi-faceted and multi-faceted As mentioned earlier, the main driver behind the high growth rate of the LED lighting market is its ability to significantly reduce power consumption. If the same amount of light output (in lumens) is provided compared to incandescent lighting, the LED requires less than 20% of the incandescent lamp. As shown in Table 1, LED lighting has more advantages, but there are more challenges. The advantages of LEDs include longer lifetimes than incandescent lamps, which greatly reduces replacement costs; especially in the residential lighting market, the ability to dim LEDs with previously installed bidirectional silicon-controlled rectifier (Triac) dimmers is also a major advantage. The LED light can be turned on in real time, without the warm-up time like the CFL, and the LED light is not sensitive to the power cycle, which is also different from the CFL lamp. In addition, the LED lighting accessory does not contain any toxic materials that need to be controlled or handled, while the CFL operates with toxic mercury vapor. Finally, LEDs can achieve new and very flat form factors, which is impossible with other technologies. These new LED lighting applications cover a wide range of applications, from 4 watt (W) screw-in replaceable incandescent bulbs to 100W street lights to high shed lights requiring hundreds of watts of power. Most of these LED lights rely on existing AC (AC) off-line power supplies (typically 90 to 265 VAC depending on the geographic location of the end application. To obtain an off-line power from the AC) The ability to efficiently drive LEDs has created some fairly unique LED driver IC design challenges. LED drivers must not only provide the highest efficiency to ensure power savings, but also provide electrical isolation for safety reasons. In addition, LED drivers are also required to provide power factor correction (PFC) and low harmonic distortion performance for a variety of applications. Not only that, but in many residential applications, LED drivers must also provide the ability to dim with existing Triac dimmers. Finally, the solution must be cost-effective and the overall area should be small enough to allow the attachment to have enough room to accommodate the solution to attract commercial and residential users to replace existing lights with LED lights. All in all, LED driver ICs that meet these requirements are available, which is critical to the widespread adoption of LED lighting applications.
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In the past few years, display backlighting applications have been a major factor driving the growth of the light-emitting diode (LED) market. However, LED general-purpose lighting is increasingly attractive in the commercial and residential markets, and it has further accelerated the growth of the LED market . According to a research report by LEDinside, a market research institute, the commercial high-lumen LED lighting system has experienced rapid growth in 2010. This is because home LED lighting is still too expensive for most consumers. On the other hand, for commercial areas such as parking lots, offices, factories, warehouses, etc., LED lighting can bring long-term benefits such as energy saving and environmental protection, and related tax reduction policies, so the LED lighting usage in these application areas will grow substantially.