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文件名称：LED调光技术
文件大小：387KB
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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.