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Dimming Techniques for Switched-Mode LED Drivers
National Semicondutor
Description
The exponential growth of LED lighting has ushered in a vast selection of integrated circuit devices to provide controlled power to LEDs. Switched-mode LED drivers have replaced power-hungry linear current sources as the standard. This article describes some basic LED theory and techniques used to provide dimming control to switched-mode LED drivers.
Company Overview
National Semiconductor creates energy-efficient analog and mixed-signal semiconductors as well as SolarMagicT power optimizers. Its PowerWise® products enable systems that consume less power, extend battery life, and generate less heat. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. Headquartered in Santa Clara, Calif., National reported sales of $1.46 billion for fiscal 2009 which ended May 31, 2009
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