Datasheet Linear Technology LT3922

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Design Notes

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  Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lightin &mdash DN557
  PDF, 298 Kb, File published: Oct 12, 2016
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  Low EMI LED Driver Features 2A, 40V, Integrated,
  Synchronous Switches for Automotive Lighting
  Design Note 557
  Keith Szolusha
  Introduction
  The breadth of LED applications has grown to encompass everything from general lighting to automotive,
  industrial and test equipment, sign boards and safety
  instruments. Feature requirements for LED drivers
  have become more extensive. The latest LED solutions require drivers that are compact, efficient, low
  noise, and have high dimming ratios and advanced
  fault protection. The LT3922 meets these demands. right balance of high efficiency and low noise. They
  can be run at up to 2.5MHz for compact solutions.
  The tiny LT3922 LED driver features low EMI, high
  efficiency and fault protection required in automotive environments. It can handle 36V automotive
  transients and 3V cold crank. Its Silent SwitcherВ®
  architecture, spread spectrum frequency modulation (SSFM) and controlled switching edges make
  it ideal for powering LEDs with low EMI. Its flexible
  topology is useful in daytime running lights, signal
  lights, taillights, and headlight segments as well as
  dashboard and heads-up displays with high dimming
  ratios. Built-in fault protection reduces the number of
  extra components required to protect against short
  and open LEDs. The LT3922 synchronous LED driver with integrated …

Articles

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  Synchronous, Low EMI LED Driver Features Integrated Switches and Internal PWM Dimming &mdash LT Journal
  PDF, 1.6 Mb, File published: Aug 10, 2016
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  August 2016 I N T H I S I S S U E power supply sequencing
  simplified 10 simple, fast pulse source
  outpaces expensive lab
  equipment 19 Volume 26 Number 3 Synchronous, Low EMI LED Driver
  Features Integrated Switches and
  Internal PWM Dimming
  Keith Szolusha and Kyle Lawrence measuring 18 2-wire
  RTDs with the LTC2983
  high accuracy digital
  temperature measurement
  system 22 minimize debug time in
  power system design
  for FPGA, GPU and ASIC The breadth of LED applications has grown to encompass
  everything from general lighting to automotive, industrial and test
  equipment, sign boards and safety equipment. As a result, the
  breadth of design requirements for LED drivers has expanded.
  The latest LED solutions require drivers that are compact,
  efficient, low noise, and feature high dimming ratios and advanced
  fault protection. The LT3922 easily meets these demands. systems 26 THE LT3922 WITH INTEGRATED SWITCHES AND
  INTERNAL PWM DIMMING The LTВ®3922 36V, synchronous LED driver with
  integrated 2A switches can be configured as a boost,
  buck or boost-buck LED driver. Its high efficiency
  synchronous and integrated power switches fit into …

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