2012 will soon be over, and this year for the LED industry can be described as mixed, although in many countries, including China, have begun to prohibit the sale of incandescent, LED lighting sales and scheduled the outbreak, but there has been the closure of many lighting manufacturers chain storm Overall, however, there are manufacturers wreathed in smiles, earn pours LED market this year is a normal adjustment year for the LED lighting market in 2013, with the replace the 40-watt (W) incandescent LED bulbs retail minimum The price has reached $ 10 sweet spot of industry have been optimistic about the overall LED lighting market is expected next year to go warm lumiere led, so the industry to do now is to do a good job of technical reserves and program selection, just waiting for the market outbreak devote. Here, combined with Power Integrations, several major LED manufacturers to talk about the latest release of the new 2013 LED lighting solutions four trends.
The dimming technology challenges facing the LED lighting applications, very large, due to LED lighting to use more current drive mode, dimmer multi-voltage dimming considerable challenges in compatibility, however, this is also to distinguish the the program merits of a weapon, LED dimming solution in the past, the common dimming range, suddenly lights dimming lumiere led, dimming flashing, seriously affect the user experience, but With the PI and other company-specific programs launched G24 LED dimming is expected to solve, PI latest LYTSwitch IC has excellent dimming performance can be achieved, even in low conduction angle can easily reach NEMA startup speed of SSL6 standards, another of the drive is very fast, usually less than 500 milliseconds, even if 10% of the amount of light output is turned on its startup speed is also fast, the actual program, the use of the bulb LYTSwitch IC design able to off almost the same as when dimming the angle of conduction, which virtually eliminates suddenly become brighter. Furthermore, the dead zone in the SCR light is eliminated, this is because the LYTSwitch controller can ensure that when the dimmer is a start working immediately dimming. In this regard, the PI-called proprietary circuit technology from dimming curve, PI program does advantages are obvious.
single-stage circuit architecture gradually occupy the mainstream
In the previous program, in order to obtain better dimming characteristics, many solution providers adopt the two-tier structure, namely PFC (power factor correction) + isolated DC / DC converter architecture, this design can effectively reduce power pattern wave, because the designers believe that the single-stage PFC circuit ripple is too large, the fear arising from the life of LED luminous efficiency and color temperature, therefore, the use of two-stage circuit more, and now, with the single-stage high switching frequency the launch of the program, the advantages of the single-stage circuit is very obvious, because in terms of efficiency, two-stage circuit is difficult with a single-stage confrontation, several vendors can be a single-stage program to do more than 92% efficiency, two-stage circuit lumiere led, usually Only about 85% efficiency.