LT3743EUFD#TRPBF

LED Driver IC Overview

The LT3743EUFD#TRPBF is a high-current synchronous step-down DC/DC controller designed for LED lighting applications. It operates with an input voltage range of 6 V to 36 V and supports output currents up to 20 A. The device features adjustable switching frequencies between 200 kHz and 1 MHz, enabling optimized efficiency and component size. It includes PWM dimming capabilities with a ratio up to 3000:1 and three-state current control for color mixing. The controller utilizes average current mode control with less than 1 µA supply current.

LED Driver IC Feature Summary

• Three-state current control enables precise color mixing for multi-color LED applications
• PWM dimming provides high contrast ratios up to 3000:1 for display and lighting
• Average current mode control ensures stable regulation with minimal quiescent current

LED Driver IC Applications

• LED drivers for projectors requiring color mixing
• High-current single-channel LED lighting systems
• General-purpose buck converter topologies for LED arrays

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the EUFD package variant matches the required thermal and footprint specifications for the target design. Ensure compatibility with Analog Devices reference designs for optimal performance validation.

LED Driver IC Selection Notes

Select this controller for applications requiring high output current capability within a compact form factor. The wide input voltage range suits various power supply configurations. Consider the thermal performance of the QFN package and the benefits of synchronous rectification for improved efficiency in high-load scenarios.

LED Driver IC Part Context

This component belongs to the LT3743 series of high-efficiency LED drivers from Analog Devices. It is part of a family of controllers designed to drive high-current LEDs using a buck topology. The EUFD variant specifically denotes the 28-pin QFN package configuration suitable for surface-mount assembly.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers include LT3743IUFD#PBF and LT3743IFE#PBF. Verify pinout and package dimensions before substitution to ensure mechanical compatibility.