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Notas de Diseño

• Descargar
  Versatile High Power LED Driver Controller Simplifies Design &mdash DN406
  PDF, 83 Kb, Archivo publicado: enero 8, 2007
  Extracto del documento

  advertisement Versatile High Power LED Driver Controller Simplifies Design
  Design Note 406
  Ryan Huff
  Introduction
  The increased popularity of high power LEDs over the
  last several years has challenged electronic engineers
  to come up with accurate and efficient, yet simple drive
  solutions. The task is more difficult as the market for
  LEDs enters the realm of high-powered lights, such as
  those for automobile headlights or large LCD backlights.
  High light-output solutions usually involve large arrays of
  individual LEDs stacked in series. Conventionally, driving
  high power strings with accurate current is at odds with
  simplicity and efficiency—typically involving an inefficient linear regulator scheme or a more complicated,
  multiple IC switching regulator configuration. There is a
  simpler and better way via a low parts count, single IC
  solution for driving high power LED strings. At the heart
  of this highly efficient, simple and accurate solution is
  the LTC3783 controller IC.
  Fully Integrated, High Power LED Driver Controller
  The LTC3783 has all of the functions that are normally
  required to run an LED string: an accurate current regulation error amplifier, a switch mode power supply (SMPS)
  controller with FET drivers, and two different ways to …

Artículos

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  High Voltage Boost/LED Controller Provides 3000:1 PWM Dimming Ratio &mdash LT Journal
  PDF, 189 Kb, Archivo publicado: marzo 28, 2006
  Extracto del documento

  DESIGN FEATURES L High Voltage Boost/LED Controller
  Provides 3000:1 PWM Dimming Ratio
  by Eugene Cheung
  Performance, Accuracy,
  Versatility: LEDs and Beyond The LTC3783 is a current-mode boost
  controller optimized for constantcurrent True Color PWMв„ў dimming
  of high-powered LEDs. Proprietary
  techniques provide extremely fast,
  true PWM load switching with no
  transient undervoltage or overvoltage
  issues. High dimming ratios of 3000:1
  (at 100Hz), important for such applications as video projectors and LCD
  backlights, can be achieved digitally,
  maintaining the color integrity of
  white and RGB LEDs. The LTC3783
  also provides an analog input for an
  additional 100:1 dimming (300,000:1
  total).
  This versatile part can also be used
  in a boost, buck, buck-boost, SEPIC, or
  flyback converter, and as a constantcurrent, constant-voltage regulator. No
  RSENSE™ operation uses a MOSFET’s
  on-resistance to eliminate the currentsense resistor, increasing efп¬Ѓciency. …

Linea modelo

Clasificación del fabricante

• Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Multitopology LED Driver
• Power Management > Switching Regulator > SEPIC Regulators | Flyback, Forward and Isolated Controllers
• Power Management > Switching Regulator > Step-Up (Boost) Regulators > External Power Switch Boost

Otros nombres:

LTC3783EDHDPBF, LTC3783EDHD PBF