LT3954EUHE#TRPBF

LED Driver IC Overview

The LT3954EUHE#TRPBF is a high-efficiency DC/DC converter designed for LED lighting applications, manufactured by Analog Devices Inc. It operates as a constant-current source and constant-voltage regulator with an input voltage range of 4.5 V to 40 V. The device supports multiple topologies including Boost, Buck, Flyback, and SEPIC configurations. It features an internal low-side N-channel switch capable of delivering up to 5 A output current. The switching frequency is adjustable from 100 kHz to 1 MHz. It includes integrated PWM dimming generation and open LED protection. The component is housed in a QFN-36 package and operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Integrated internal low-side N-channel power switch supporting up to 5 A continuous output current
• Built-in PWM dimming generator for precise LED brightness control without external microcontrollers
• Flexible topology support enabling Boost, Buck, Flyback, and SEPIC circuit configurations
• Open LED protection mechanism to prevent damage during fault conditions

LED Driver IC Applications

• General LED lighting systems requiring constant current regulation
• Display backlight drivers for industrial or commercial displays
• Indicator lighting circuits utilizing PWM dimming capabilities
• Automotive interior lighting applications compatible with wide input voltage ranges

LED Driver IC Procurement Notes

Verify the specific suffix (#TRPBF) indicates tape-and-reel packaging when sourcing components. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the supplier provides valid traceability records for quality assurance purposes. Cross-reference the full part number to distinguish between tube and reel variants. Validate that the procurement channel is authorized to guarantee product authenticity and performance specifications.

LED Driver IC Selection Notes

Select this component when designing LED drivers requiring a single-chip solution with integrated switching and control. Consider the QFN-36 package size for thermal management and PCB space constraints. Evaluate the need for adjustable switching frequencies between 100 kHz and 1 MHz to optimize inductor size and efficiency. Ensure the application benefits from the internal PWM generator to simplify system architecture. Verify that the 40 V maximum input voltage aligns with the system power supply requirements.

LED Driver IC Part Context

The LT3954 belongs to the LT3954 series of LED driver ICs from Analog Devices. It is functionally similar to the LT3957 but optimized specifically for LED lighting with integrated dimming features. The EUHE variant denotes the specific pinout and thermal pad configuration within the QFN-36 package family. This part serves as a direct replacement for discrete LED driver solutions in compact designs.

LED Driver IC Replacement Considerations

The LT3954EUHE#PBF is the tube-packaged equivalent of the #TRPBF reel version. Both share identical electrical characteristics and functionality. Substitution requires verifying the packaging preference for assembly line compatibility. No functional changes occur between the two packaging options.

LED Driver IC FAQ

What is the maximum output current capability of the LT3954EUHE#TRPBF?

The device supports a maximum output current of 5 A.

Does the LT3954 require an external controller for PWM dimming?

No, it features an internal PWM dimming generator, eliminating the need for an external microcontroller.

Which operating modes are supported by the LT3954?

It supports Boost, Buck, Flyback, and SEPIC topologies.