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  Reduce the Cost and Complexity of Medium LCD LED Backlights with a Single Inductor LED Driver for 60 LEDs &mdash DN462
  PDF, 95 Kb, Archivo publicado: marzo 4, 2009
  Extracto del documento

  Reduce the Cost and Complexity of Medium LCD LED
  Backlights with a Single Inductor LED Driver for 60 LEDs
  Design Note 462
  Daniel Chen
  Introduction
  One inductor, one IC, one string of LEDs. This is the
  conventional way to build a boost LED driver for LCD
  display backlights. Although this is a perfectly acceptable solution for small LCD displays that only require a
  few strings, in larger displays the number of control ICs
  and inductors multiplies quickly, as do the expenses and
  PCB real estate requirements. This is a major hurdle in
  the race to replace CCFLs with robust, spectrally superior
  LEDs in medium sized, bright displays.
  A better driver is needed to bring the cost and complexity of LED backlights in line with CCFLs. The LT3598
  answers the call by driving six strings of ten LEDs at up
  to 30mA per string. It also has a built-in power switch
  to save space and design time. Efficiency is optimized
  via an adaptive feedback loop that monitors all LED pin
  voltages to provide an output voltage just high enough
  to light all LED strings. The LED current is regulated even
  when VIN is greater than VOUT . The LED current can be
  derated based on programmed LED temperature through
  an NTC resistor divider or by programming die junction …

Linea modelo

Clasificación del fabricante

• Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers

Otros nombres:

LT3598IFEPBF, LT3598IFE PBF