LT3909IDD#TRPBF

LED Driver IC Overview

The LT3909IDD#TRPBF is a dual-string LED driver featuring a fixed 2MHz boost DC/DC converter capable of driving LEDs up to 36V. It integrates accurate high-side current sources with 2% current matching per string. The device supports analog and PWM dimming, operates within a 2.9V to 40V input range, and delivers 50mA output current per channel. It is housed in a 12-DFN (3x3) package.

LED Driver IC Feature Summary

• Integrates a fixed 2MHz step-up DC/DC converter for efficient LED power management
• Provides two independent high-side current sources with precise 2% current matching accuracy
• Supports both analog and pulse-width modulation (PWM) dimming control methods

LED Driver IC Applications

• Automotive lighting systems
• General LED illumination applications
• High-brightness LED arrays requiring precise current regulation

LED Driver IC Procurement Notes

Verify the manufacturer designation carefully, as some distributor listings incorrectly identify this component under different brand names. Confirm the specific suffix #TRPBF indicates tape and reel packaging. Ensure compatibility with automotive or industrial environmental requirements if applicable to the target design.

LED Driver IC Selection Notes

Select this component when designing circuits requiring dual-channel LED drive with tight current matching specifications. The fixed 2MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 36V maximum LED voltage limit when determining series string configurations.

LED Driver IC Part Context

This part belongs to the LT3909 family of LED drivers from Analog Devices Inc. It is functionally similar to the LT3909IDD#PBF but differs in packaging format. The device is designed for applications demanding high efficiency and precise current control in space-constrained environments.

LED Driver IC Replacement Considerations

LT3909IDD#PBF serves as a direct alternative with identical electrical characteristics, differing only in tube versus tape-and-reel packaging.