LT3909IMSE#TRPBF

LED Driver IC Overview

The LT3909IMSE#TRPBF is a dual-channel synchronous step-up LED driver IC manufactured by Analog Devices Inc. It features two independent current-regulated outputs capable of driving up to 50mA per channel, designed for high-efficiency power conversion with typical efficiency exceeding 90%. The device supports an input voltage range starting from 3V and operates at a fixed switching frequency of 2MHz. It accommodates both analog and PWM dimming control methods and functions within a junction temperature range of -40°C to 125°C.

LED Driver IC Feature Summary

• Dual synchronous step-up topology providing independent current regulation for two LED strings
• Supports combined analog and PWM dimming control interfaces for precise brightness adjustment
• High switching frequency operation enables the use of compact external passive components

LED Driver IC Applications

• Automotive exterior lighting systems requiring dual-channel regulation
• Interior ambient lighting modules utilizing PWM dimming capabilities
• Compact portable devices needing efficient boost conversion for LED arrays

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the IMSE variant corresponds to the industrial temperature grade and MSOP-EP package. Ensure compatibility with system requirements for 2MHz switching noise and 50mA output limits before finalizing procurement specifications.

LED Driver IC Selection Notes

Select this component when designing circuits requiring dual isolated or common-ground LED channels from a low-voltage source. The 2MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the thermal performance of the exposed pad package if operating near the upper temperature limit.

LED Driver IC Part Context

This part belongs to the LT3909 series of LED drivers from Analog Devices. It is distinct from buck converters like the LT3990 or other regulators in the portfolio. The device is specifically engineered for LED applications rather than general-purpose power supply regulation.

LED Driver IC Replacement Considerations

Direct substitutes include LT3909EMSE#TRPBF for commercial temperature grade or LT3909IMSE#PBF for tube packaging. Verify pinout compatibility and electrical parameters match before swapping.