文件名称：LED调光技术
文件大小：387KB
文件格式：PDF
更新时间：2015-02-16 15:23:04
LED DIMMING
LED 调光技术 Introduction Th e exponential growth of LED lighting has ushered in a vast selection of integrated circuit devices to provide controlled power to LEDs. No longer acceptable to an energy-conscious world, switched-mode LED drivers have long since replaced power-hungry linear current sources as the standard. Applications from fl ashlights to stadium scoreboards all require precise control of regulated currents. In many instances, real-time changes in LED output intensity are required. Th is function is commonly referred to as dimming control. Th is article describes some basic LED theory and several techniques used to provide dimming control to switched-mode LED drivers.