LT3797ILXE#PBF

LED Driver IC Overview

The LT3797ILXE#PBF is a triple-output DC/DC controller designed for driving three series-connected LED strings. It features a fixed-frequency, current-mode architecture ensuring stable operation across wide input and output voltage ranges. The device supports input voltages from 2.5 V to 40 V and delivers up to 5 A output current per channel. Operating frequencies range from 100 kHz to 1 MHz. It includes PWM dimming capabilities and open LED protection. The component operates within a temperature range of -40°C to +125°C and is housed in a QFN-52 package.

LED Driver IC Feature Summary

• Triple-output architecture for independent control of three LED strings
• Integrated fixed-frequency current-mode control for stable regulation
• Supports multiple topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC
• Built-in open LED protection and PWM dimming functionality

LED Driver IC Applications

• Automotive exterior lighting systems
• High-power LED street lighting fixtures
• Industrial high-bay LED illumination
• Architectural accent lighting arrays

LED Driver IC Procurement Notes

Verify the specific suffix (ILXE) against the manufacturer's official datasheet to confirm the exact operating temperature grade and package variant. Ensure compatibility with the intended PCB footprint for the QFN-52 package. Confirm that the application circuit design accounts for the specified 40 V maximum ratings for both input and output voltages to prevent device damage.

LED Driver IC Selection Notes

Select this controller when a single IC must manage three separate LED channels with independent current regulation. It is suitable for applications requiring wide input voltage flexibility and support for various converter topologies. Consider the thermal performance requirements associated with the 5 A output capability and the QFN-52 package thermal dissipation characteristics during the design phase.

LED Driver IC Part Context

This part belongs to the LT3797 family of LED driver controllers from Analog Devices. The ILXE suffix typically denotes an industrial or automotive-grade temperature range variant compared to commercial versions. The family is characterized by its ability to drive multiple LED strings from a single controller, simplifying system design for complex lighting architectures.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-references through official Analog Devices distribution channels or authorized distributors to ensure functional equivalence regarding pinout, electrical specifications, and thermal performance.