LT3956EUHE

LED Driver IC Overview

The LT3956EUHE is a high-voltage DC/DC converter IC from Analog Devices, designed for LED lighting and general power conversion applications. It supports multiple topologies including Boost, Buck, Flyback, and SEPIC. The device operates with an input voltage range of 4.5V to 80V and can deliver up to 3.3A switch current. It features adjustable output voltage up to 80V and includes analog and PWM dimming capabilities. Packaged in a 36-lead QFN (5x6mm) with exposed pad, it functions as both a constant-current source and constant-voltage regulator.

LED Driver IC Feature Summary

• Supports versatile topology configurations including boost, buck, flyback, and SEPIC for flexible circuit design.
• Integrates analog and pulse-width modulation (PWM) dimming controls for precise light management.
• Operates as a combined constant-current and constant-voltage regulator suitable for demanding load requirements.

LED Driver IC Applications

• High-voltage LED lighting drivers
• Industrial power supply designs requiring wide input ranges
• Automotive illumination systems

LED Driver IC Procurement Notes

Verify the specific suffix (PBF vs TRPBF) against your assembly requirements, as packaging formats differ between tubes and reels. Confirm availability status directly with authorized distributors, as this component may be subject to restricted availability or limited stock conditions. Ensure the 36-QFN package footprint matches your PCB layout constraints before finalizing procurement.

LED Driver IC Selection Notes

Select this component when designing circuits that require a single IC to handle multiple converter topologies such as flyback or SEPIC. It is appropriate for applications needing wide input voltage tolerance up to 80V. Consider the thermal performance of the exposed pad QFN package for heat dissipation. Verify that the required dimming method aligns with the integrated analog and PWM control interfaces.

LED Driver IC Part Context

This part belongs to the LT3958/LT3957/LT3956 family of high-voltage converters from Analog Devices. These devices are engineered for robust performance in industrial and automotive environments. The EUHE suffix indicates a specific lead-free, RoHS-compliant variant housed in a compact surface-mount package, distinguishing it from older or non-compliant versions within the same functional series.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Analog Devices resources for cross-reference data or verify compatibility with alternative high-voltage LED driver ICs based on specific pinout and electrical parameter matching.