LT3763

PRODUCTION

60V High Current Step-Down LED Driver Controller

Data Sheet (Rev. C) Product Selection Table
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Overview

  • Accurately Control Input and Output Current
  • 3000:1 True Color PWM™ Dimming
  • ±1.5% Voltage Regulation Accuracy
  • ±6% Current Regulation Accuracy
  • 6V to 60V Input Voltage Range
  • Wide Output Range Up to 55V
  • <2µA Shutdown Current
  • Control Pin for Thermal Control of Load Current
  • Input and Output Current Monitor and Limit
  • Open, Short, and C/10 Fault Detection
  • PWM Driver Output for LED Applications
  • Thermally Enhanced 28-Lead FE Package

The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode controller will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an external sense resistor. Voltage regulation and overvoltage protection are set with a voltage divider from the output to the FB pin. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin or with the SYNC pin and an external clock signal. Input and output current sensing provides input current limiting and an accurate measurement of these currents. The FBIN pin is provided for applications requiring a peak power tracking function.

Additional features include an accurate external reference voltage for use with the CTRL pins, an accurate UVLO/EN pin that allows for programmable UVLO hysteresis, a PWM driver for LED applications, output voltage fault detection, and thermal shutdown.

Applications

  • High Power Architectural Lighting
  • Automotive Lighting
  • Aviation and Marine Strobe Lights
  • Solar-Powered Chargers, Laser Diodes
LT3763
60V High Current Step-Down LED Driver Controller
LT3763 Application Circuit LT3763 Pin Configuration LT3763 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Protection Switches & Controllers 1
LTC4364
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT3763
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
schematic 6
DC1831A

LT3763 Demo Board | High Power CC/CV Synchronous Buck LED Driver Controller

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Product Details

Demonstration circuit 1831A is a high power constant current, constant voltage synchronous buck controller featuring the LT3763. The input of the demo board is up to 60V. The output is optimized for 10V, 10A as a LED driver. The input voltage range of the LT3763 itself is 6V to 60V.

The demo board input range is 12V to 60V, therefore, the demo board utilizes 80V MOSFETs. If an application has a maximum input voltage of 48V, 60V MOSFETs such as BSC100N06LS3, can be used for better efficiency at lower voltage range.

DC1831A
LT3763 Demo Board | High Power CC/CV Synchronous Buck LED Driver Controller
DC1831A Demo Board DC1831A Demo Board DC1831A Demo Board DC1831A Demo Board DC1831A DC1831A - Schematic

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