LT3955EUHE#PBF

LED Driver IC Overview

The LT3955EUHE#PBF is a high-voltage LED driver IC from Analog Devices, designed for robust lighting applications. It supports multiple topologies including boost, flyback, SEPIC, and buck configurations. The device features an integrated PWM generator for dimming control and handles input voltages up to 60V with output capabilities reaching 80V. It delivers a switch current of 3.5A at a typical switching frequency of 1MHz. Packaged in a 36-pin QFN (5x6 mm) format, it operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Integrated internal PWM generator for precise dimming control without external components
• Supports versatile converter topologies including boost, flyback, SEPIC, and step-down configurations
• High voltage tolerance with 60V input and 80V output capability for flexible system design

LED Driver IC Applications

• Industrial LED lighting systems requiring high input voltage tolerance
• Automotive exterior lighting modules utilizing flyback or boost architectures
• Commercial signage and display backlighting driven by SEPIC or buck converters

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when ordering. Confirm availability status as supply may be limited or subject to allocation. Ensure the 36-QFN package dimensions match your PCB footprint requirements. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm pinout and electrical specifications before finalizing procurement.

LED Driver IC Selection Notes

Select this component when designing LED drivers that require integration of PWM dimming functionality directly within the controller. It is suitable for applications needing support for multiple power stages such as boost or flyback from a single IC. Consider the 3.5A switch current rating against your LED string requirements. Evaluate the 36-QFN thermal performance for your enclosure constraints.

LED Driver IC Part Context

This part belongs to the LT3955 family of high-voltage LED converters. It shares functional similarities with other members like the LT3958 but differs in specific parameter limits and feature sets. The EUHE suffix denotes the specific temperature grade and package variant within the broader product line.

LED Driver IC Replacement Considerations

Direct substitutes include other parts from the LT3955 series such as LT3955IUHE#PBF, provided they meet the same voltage and current requirements. Verify compatibility with existing PCB layouts due to potential pinout variations between different package options within the family.