Datasheet Linear Technology LT3791HFE#PBF — Ficha de datos

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Notas de Diseño

• Descargar
  60V Buck-Boost Controller Drives High Power LEDs, Charges Batteries and Regulates Voltage with Up to 98.5% Efficiency at 100W and Higher &mdash DN501
  PDF, 92 Kb, Archivo publicado: marzo 9, 2012
  Extracto del documento

  60V Buck-Boost Controller Drives High Power LEDs, Charges
  Batteries and Regulates Voltage with Up to 98.5% Efficiency at
  100W and Higher – Design Note 501
  Keith Szolusha Buck-Boost Controller Drives 100W LED String for
  Airplane and Truck Lights
  Airplanes and big trucks with 24V batteries need powerful, efficient and robust headlights and spotlights.
  FigureВ 1 shows a 33.3V, 3A (nine Luminus SSR-90 LEDs)
  VIN
  15V TO 58V RIN
  0.003О© VIN CVIN
  1ОјF TG1 INTVCC BG1
  LT3791 SHORTLED OPENLED OPENLED PWM DIM PWM
  IVINMON
  ISMON
  CLKOUT
  VREF 0.1ОјF
  DIM D2 4.7ОјF
  10V M2 0.1ОјF
  L1 10ОјH M4 1M M3 34.2k 98 RLED
  0.033О© SNSN
  PGND
  BG2 33.3VLED
  3A …

Artículos

• Descargar
  Meet Green Standards in 24VAC and 12VAC Lighting Systems: Replace Halogen Bulbs with LEDs Driven by High Power Factor, High Efficiency Converter &mdash LT Journal
  PDF, 4.0 Mb, Archivo publicado: oct 9, 2013
  Extracto del documento

  Meet Green Standards in 24VAC and 12VAC Lighting
  Systems: Replace Halogen Bulbs with LEDs Driven by
  High Power Factor, High Efficiency Converter
  Keith Szolusha LEDs are increasingly used in 24VAC and 12VAC lighting systems as a robust,
  energy efficient and high performance alternative to halogen lamps. Power
  converters that drive the LEDs should have a high power factor (above 90% in order
  to meet generally accepted green standards), should be efficient, use a minimal
  number of components and should run cool. They do not need isolation.
  One solution that meets these requirements combines a rectifier bridge and a
  current-controlled synchronous step-up/
  step-down converter. Specifically, a synchronous 4-switch buck-boost converter
  can be paired with a 4-switch ideal diode rectifier bridge for high power LEDs; lower
  power solutions can use a standard diode
  bridge. Both solutions are shown here.
  The LT3791 60V 4-switch synchronous
  buck-boost controller IC can drive constant current (either DC or pulsating) into PVIN
  24VRMS
  PULSATING 120Hz M5 RIN
  0.003О© M6 CIN
  1ВµF
  50V 51О©
  0.1ВµF TG2
  24VAC …

Linea modelo

Clasificación del fabricante

• Power Management > LED Driver ICs > Buck-Boost LED Drivers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators | Extended Temperature (H & MP) LED Drivers

Otros nombres:

LT3791HFEPBF, LT3791HFE PBF