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  Single-Wire Camera LED Charge Pump Allows Multiple Output Current Levels With Single-Resistor Programmability &mdash LT Journal
  PDF, 226 Kb, Archivo publicado: oct 16, 2007
  Extracto del documento

  DESIGN IDEAS L Single-Wire Camera LED Charge
  Pump Allows Multiple Output
  Current Levels With Single-Resistor
  Programmability
  by Mohammed H. Jafri
  Introduction
  time, the LTC3218 features a built-in
  timer. This timer shuts down the part
  if it has been enabled in flash-mode
  (ENF = HIGH) for more than 2 seconds.
  The timer is reset by bringing the part
  into shutdown and re-enabling it. ENT ILED LOW LOW SHUTDOWN LOW HIGH 1029/RSETT HIGH LOW 2965/RSETF HIGH HIGH 3993/RSETF Linear Technology Magazine October 2007 90 Multiple Current Ratios
  LED drivers often use external resistors to program LED current. The LED
  current is related to the programming
  resistor current through a fixed ratio.
  By employing multiple current ratios,
  the LTC3218 can be programmed for 80
  70
  60
  50mA
  150mA
  300mA 50
  40 …

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Clasificación del fabricante

• Power Management > Inductorless (Charge Pump) DC/DC Converters > Inductorless (Charge Pump) LED Drivers

Otros nombres:

LTC3218EDDBPBF, LTC3218EDDB PBF