LT3955EUHE#TRPBF

LED Driver IC Overview

The LT3955EUHE#TRPBF is a high-voltage LED driver IC from Analog Devices, designed for constant current and constant voltage regulation. It integrates an 80V/3.5A low-side N-channel MOSFET and supports multiple topologies including boost, flyback, SEPIC, buck, and inverting configurations. The device features an internal PWM generator for dimming control and operates with a switching frequency of 1MHz. It is housed in a 36-lead QFN (5x6mm) package and functions within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Integrates an 80V/3.5A low-side N-channel MOSFET for compact design
• Supports versatile DC/DC converter topologies including boost, flyback, SEPIC, and buck
• Includes an internal PWM generator for precise analog and PWM dimming control

LED Driver IC Applications

• High-voltage LED lighting systems
• Industrial LED drivers requiring constant current regulation
• Automotive exterior lighting applications

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Analog Devices Inc., formerly Linear Technology. Ensure compatibility with 36-lead QFN footprints during PCB layout. Check for RoHS compliance documentation prior to integration into regulated assemblies.

LED Driver IC Selection Notes

Select this component for designs requiring high input voltage handling up to 60V and output voltages up to 80V. The integrated MOSFET eliminates external switch requirements, reducing bill of materials. Consider the 3.5A switch current limit for load matching. Evaluate thermal performance given the QFN package constraints under continuous operation at elevated temperatures.

LED Driver IC Part Context

This part belongs to the LT3955 series of high-voltage LED converters. It shares the core architecture with variants like LT3955IUHE but differs in packaging and reel configuration. The series is characterized by its ability to drive LEDs in complex topologies while maintaining high efficiency through synchronous rectification techniques inherent in the integrated MOSFET structure.

LED Driver IC Replacement Considerations

LT3955EUHE#PBF is the tube-packaged equivalent of this tape-and-reel variant. Both share identical electrical characteristics and pinouts. Verify that the application board handles the specific packaging format required for automated assembly processes.