Dimming Techniques for Switch-Mode LED Drivers

摘要

Many LED approaches exist. Described here are several techniques used to provide dimming control to DC-DC switch-mode LED drivers. 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, switch-mode LED drivers have long since replaced power hungry linear current sources as the standard. Applications ranging from flashlights to streetlights to stadium scoreboards all require precise control of LED light output, commonly referred to as luminous flux.