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Overview

Features and Benefits

  • 3000:1 External PWM Dimming
  • 250:1 Internal PWM Dimming
  • Wide VIN Operating Range: 2.5V to 38.5V
  • Synchronous Boost Output Voltage up to 60V
  • Spread-Spectrum Frequency Modulation for Lower EMI
  • PMOS Switch Driver for PWM and Output Disconnect
  • Constant Current (±3.5%) Regulation
  • Constant Voltage (±2%) Regulation
  • Rail-to-Rail LED Current Sense: 0V to 60V
  • Programmable VIN Undervoltage Lockout
  • Analog Dimming via Two Control Pins
  • 100kHz to 1MHz Operation
  • Programmable Open LED Protection with OPENLED Flag
  • Short-Circuit Protection and SHORTLED Flag
  • Drives LEDs in Boost, SEPIC, Buck Mode, or BuckBoost Mode Configurations
  • 28 Lead TSSOP and QFN (4mm × 5mm) Exposed Pad Packages

Product Details

The LT3762 is a synchronous DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal generator and a synchronous gate driver. The LT3762 is ideally suited for driving high current LEDs with high efficiency and reduced power loss. Rail-to-rail switch current sensing enables synchronous boost topologies and nonsynchronous topologies such as SEPIC. A voltage feedback pin serves as the input for several LED protection features and also allows the converter to operate as a constant-voltage source.

A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance and external component size. Adding a capacitor at SSFM pin activates the Spread-Spectrum Modulation feature to reduce EMI. The LT3762 also includes an integrated DC/DC converter to efficiently produce a regulated 7.5V supply for the N-channel MOSFET gate drivers. The PWM pin controls PWMTG to drive the P-channel MOSFET, allowing a high PWM dimming range (3000:1) and providing LED overcurrent protection and short-circuit protected boost capability.

Applications

  • Industrial and Automotive Lighting
  • Accurate Current-Limited Voltage Regulators

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.