Transcription of Dimming Techniques for Switched-Mode LED Drivers
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Dimming Techniques for Switched-Mode LED Drivers
LM3406,LM3409 Dimming Techniques for Switched-Mode LED DriversLiterature Number: SNVA605 POWER designer Expert tips, tricks, and Techniques for powerful designs No. 119 No. 126 Dimming Techniques for Switched-Mode LED Drivers By Rich Rosen, Field Applications Engineer Feature Article .. 1-6 TRIAC Dimmable LED Driver ..2 IntroductionTh 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.
4 POWER designer Dimming Techniques for Switched-Mode LED Drivers Th e dimming of the LED now becomes propor-tional to the duty cycle of the dimming waveform,
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