LT3599IFE

LED Driver IC Overview

The LT3599IFE is a fixed frequency 2A step-up DC/DC converter designed to drive four strings of LEDs. It supports an output voltage up to 44V and provides a regulated output current of 120mA per channel. The device features ±1.5% current matching across channels. It operates with a supply voltage range from 3.1V to 30V. The component is housed in a 28-lead TSSOP package with an exposed pad.

LED Driver IC Feature Summary

• Integrated 2A step-up DC/DC converter for high-voltage LED driving
• Four independent channels with ±1.5% current matching accuracy
• Supports analog and PWM dimming control methods

LED Driver IC Applications

• Automotive exterior lighting systems
• High-brightness LED arrays requiring precise current regulation
• Industrial illumination fixtures

LED Driver IC Procurement Notes

Verify the specific suffix (PBF vs TRPBF) against the required packaging format, as one denotes tube packaging and the other tape and reel. Confirm the lead-free status indicated by the PBF suffix aligns with RoHS compliance requirements for the target assembly process. Ensure the 28-TSSOP-EP footprint matches the PCB land pattern design specifications.

LED Driver IC Selection Notes

Select this component when four separate LED strings require identical current regulation within a tight tolerance band. The fixed frequency operation simplifies external filter design compared to variable frequency alternatives. Consider the maximum input voltage limit of 30V when designing the power supply stage to prevent overvoltage damage to the controller circuitry.

LED Driver IC Part Context

This part belongs to the LT3599 family of LED drivers manufactured by Analog Devices Inc. It serves as a specialized solution for multi-string LED applications where uniform brightness is critical. The device integrates the power switch and control logic into a single compact package, reducing the overall bill of materials and board space compared to discrete solutions.

LED Driver IC Replacement Considerations

LT3599EFE#TRPBF is a documented equivalent variant differing primarily in packaging type rather than electrical function.

LED Driver IC FAQ

What is the maximum output voltage capability of the LT3599IFE?

The device is designed to drive LEDs up to a maximum output voltage of 44V.

How does the LT3599IFE handle LED current regulation?

It regulates each of the four channels to a constant 120mA with a matching accuracy of ±1.5%.