Datasheet Linear Technology LT3496IUFD#TRPBF

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Design Notes

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  Triple LED Driver in 4mm Г— 5mm QFN Supports LCD Backlights in Buck, Boost or Buck-Boost Modes and Delivers 3000:1 PWM Dimming Ratio &mdash DN449
  PDF, 111 Kb, File published: Aug 21, 2008
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  Triple LED Driver in 4mm Г— 5mm QFN Supports LCD
  Backlights in Buck, Boost or Buck-Boost Modes and
  Delivers 3000:1 PWM Dimming Ratio
  Design Note 449
  Hua (Walker) Bai
  Introduction
  By integrating three independent LED drivers, the LTВ®3496
  offers a highly efficient, compact and cost-effective
  solution to drive multiple LED strings. All three drivers
  have independent on/off and PWM dimming control, and
  can drive different numbers or types of LEDs. High side
  current sensing and built-in gate drivers for PMOS LED
  disconnect allow the LT3496 to operate in buck, boost,
  SEPIC or buck-boost modes with up to 3000:1 True Color
  PWMв„ў dimming ratio.
  The LT3496 is offered in a single 4mm Г— 5mm QFN or
  FE28 package. The efficiency of each driver can exceed
  95%. Integrated PMOS Drivers Improve PWM Dimming
  Ratio to 3000:1
  A high PWM dimming ratio is critical in many display
  applications, especially in high end LCD panels. Beware,
  though, the definition of dimming ratio varies among
  suppliers. When comparing dimming ratios, pay close …

Articles

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  Triple Output LED Driver Delivers 3000:1 Dimming Ratio in Buck, Boost or Buck-Boost Mode &mdash LT Journal
  PDF, 529 Kb, File published: Jun 14, 2007
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  L DESIGN FEATURES Triple Output LED Driver Delivers
  3000:1 Dimming Ratio in Buck,
  by Bin Zhang
  Boost or Buck-Boost Mode
  Introduction
  The LT3496 is a triple output DC/DC
  converter designed for high performance, True Color PWMTM dimming
  in multichannel LED lighting applications. By integrating three independent
  driver channels, the LT3496 provides
  a space-saving and cost-efficient solution to drive multiple LED strings.
  FigureВ 1 shows a 50W LT3496 3-channel LED driver that occupies 350mm2
  and with a sub-1.5mm profile.
  SIMPLIFIED TRADITIONAL
  LED DRIVER BOARD SIX WIRES L1
  15ВµH
  LED
  DRIVER ratio in buck, boost, or buck-boost
  configurations. The 45V capability of
  the internal power switch, 3V–40V
  input voltage range, and adjustable
  frequency result in reliable operation
  over a wide range of supply and output
  voltages. Applications for the LT3496 …

Model Line

Manufacturer's Classification

• Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Step-Down (Buck) LED Drivers | Buck-Boost LED Drivers | Multitopology LED Driver
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) LED Drivers

Other Names:

LT3496IUFDTRPBF, LT3496IUFD TRPBF