LT3909EDD#PBF

LED Driver IC Overview

The LT3909EDD#PBF is a dual-string LED driver IC featuring a fixed 2MHz step-up DC/DC converter. It supports input voltages from 2.9V to 40V and drives up to 36V of LEDs. Each string utilizes an accurate high-side current source with ±2% current matching capability. The device operates at a switching frequency of 2MHz and provides PWM dimming control. It is housed in a 12-WFDFN exposed pad package.

LED Driver IC Feature Summary

• Dual-string architecture with independent high-side current sources for each LED channel
• Fixed 2MHz step-up DC/DC converter topology for efficient voltage boosting
• High-precision current matching between strings ensuring uniform brightness distribution

LED Driver IC Applications

• Automotive exterior lighting systems requiring precise current regulation
• Portable electronic devices utilizing multiple LED arrays
• Industrial illumination modules needing compact power management solutions

LED Driver IC Procurement Notes

Verify the complete part number including suffixes such as #PBF for lead-free compliance. Confirm package type matches design requirements. Check manufacturer documentation for specific handling and storage conditions. Ensure compatibility with system input voltage ranges before integration.

LED Driver IC Selection Notes

Select this component when dual-channel LED driving with tight current matching is required. The fixed 2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the maximum output voltage capability meets the total forward voltage of the LED string configuration.

LED Driver IC Part Context

This part belongs to the LT3909 family of LED drivers designed for high-efficiency lighting applications. It integrates power switches and control logic into a single compact package. The series offers various packaging options and operating temperature ranges to suit different environmental constraints.

LED Driver IC Replacement Considerations

LT3909EDD#TRPBF is a tape-and-reel variant of the same functional device. Verify package dimensions and pinout compatibility when substituting. Ensure thermal performance characteristics remain within acceptable limits for the target application.