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  Mar2006 SC70 LED Driver Drives Six White LEDs from a Single Li-Ion Battery &mdash LT Journal
  PDF, 316 Kb, Datei veröffentlicht: Mar 28, 2006
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  L DESIGN IDEAS SC70 LED Driver Drives Six White LEDs
  from a Single Li-Ion Battery by Mayur Kenia
  Introduction
  The highly integrated LT3491 provides
  a compact, simple solution for driving
  backlight circuits in battery-powered
  portable devices, such as cellular
  phones, PDAs, and portable GPS
  devices. It features internal compensation, open-LED protection, a 32V
  power switch and a 32V Schottky diode
  all inside a tiny SC70 package.
  Specifically, the LT3491 is a fixed
  frequency step-up DC/DC converter
  that drives up to six white LEDs in
  series from a Li-Ion cell. Series connection of the LEDs provides identical
  LED currents resulting in uniform
  brightness without the need for ballast resistors. In addition, the 2.3MHz
  switching frequency allows the use of
  tiny inductors and capacitors.
  Figure 1 shows how easy it is to drive
  six white LEDs from a Li-Ion battery.
  Figure 2 shows the efficiency of the six
  white LED application circuit. SHUTDOWN AND …

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Herstellerklassifikation

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

Andere Namen:

LT3491ESC8PBF, LT3491ESC8 PBF