LT3476EUHF#PBF

LED Driver IC Overview

The LT3476EUHF#PBF is a high-current quad output LED driver manufactured by Analog Devices Inc. It operates as a constant-current source for driving high-current LEDs, featuring a fixed frequency current-mode architecture for stable operation across wide supply and output voltage ranges. The device supports an input voltage range of 2.8V to 16V and delivers up to 100W of output power. A frequency adjust pin allows switching frequency programming between 200kHz and 2MHz to optimize efficiency and external component size. It utilizes a 38-pin QFN EP package.

LED Driver IC Feature Summary

• Quad output DC-DC converter architecture designed for high-current LED applications
• Fixed frequency current-mode control ensures stability over wide voltage ranges
• Programmable switching frequency via external pin for efficiency optimization
• Automotive qualified with extended temperature range capabilities

LED Driver IC Applications

• High-current LED lighting systems
• Automotive exterior lighting modules
• Industrial LED illumination arrays
• General-purpose constant-current LED drivers

LED Driver IC Procurement Notes

Verify the specific suffix (EUHF#PBF) against the manufacturer's latest datasheet to confirm package type and tube packaging status. Ensure the procurement channel provides valid traceability documentation. Cross-reference the automotive qualification grade if required for the target application environment. Confirm that the 38-pin QFN EP footprint matches the design layout requirements before finalizing orders.

LED Driver IC Selection Notes

Select this component when designing multi-channel LED drivers requiring independent regulation or shared topology. Consider the programmable frequency range to balance EMI performance against passive component size. Evaluate the thermal dissipation requirements of the QFN EP package for the intended power density. Verify compatibility with the system's input voltage profile within the specified 2.8V to 16V window.

LED Driver IC Part Context

The LT3476 series belongs to Analog Devices' portfolio of specialized LED lighting controllers. This specific part integrates four drive channels into a single IC, simplifying board space compared to discrete solutions. It targets applications demanding high reliability and precise current regulation in compact form factors, bridging the gap between simple linear drivers and complex multi-controller systems.

LED Driver IC Replacement Considerations

LT3476EUD#PBF

LED Driver IC FAQ

What is the operating temperature range for the LT3476?

The device supports an extended temperature range suitable for automotive applications, typically spanning from -40°C to +125°C.

How is the switching frequency determined?

The switching frequency is set by an external resistor connected to the frequency adjust pin, allowing user programming between 200kHz and 2MHz.