LT3954IUHE#TRPBF

LED Driver IC Overview

The LT3954IUHE#TRPBF is a high-performance LED lighting driver IC from Analog Devices, designed for versatile topologies including Boost, Buck, Flyback, and SEPIC. It features an integrated PWM generator for precise dimming control and supports input voltages ranging from 4.5 V to 40 V. The device delivers up to 5 A of output current with adjustable voltage regulation. Operating frequencies are programmable between 100 kHz and 1 MHz, housed in a compact QFN-36 package. It functions within a temperature range of -40°C to +125°C, offering open LED protection and low standby current.

LED Driver IC Feature Summary

• Integrated internal PWM generator for direct digital dimming control without external microcontrollers
• Supports multiple converter topologies including boost, buck, flyback, and SEPIC configurations
• Provides robust open LED protection to prevent damage during fault conditions
• Features wide input voltage range accommodating various power supply architectures

LED Driver IC Applications

• General LED lighting systems requiring high brightness and efficiency
• Display backlighting applications needing precise analog or PWM dimming
• Industrial indicator lights and status signaling modules
• Automotive interior lighting components operating under variable voltage conditions

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the UH variant denotes the extended temperature grade suitable for harsh environments. Ensure compatibility with the intended PCB footprint for the QFN-36 package. Cross-reference the latest datasheet revision for any updates on thermal recommendations or pin assignments before finalizing procurement specifications.

LED Driver IC Selection Notes

Select this component when a single IC must support multiple LED drive topologies such as boost or flyback. Consider it for designs requiring integrated PWM dimming to reduce bill-of-materials complexity. Evaluate the 5 A switch current capability against peak LED load requirements. Ensure the 40 V maximum input rating aligns with the system's power source limits and transient conditions.

LED Driver IC Part Context

This part belongs to the LT3954 series of LED drivers from Analog Devices. It shares functional similarities with other members like the LT3958 but differs in current handling and input voltage ranges. The TRPBF suffix specifically denotes the reel-packaged version of the standard LT3954IUHE device, facilitating automated surface-mount assembly processes.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.