LT3909EMSE#PBF

LED Driver IC Overview

The LT3909EMSE#PBF is a dual-string LED driver IC manufactured by Analog Devices Inc. It features a fixed 2MHz step-up DC/DC converter designed to drive up to 36V of LEDs. The device provides two independent current-regulated outputs, each capable of delivering up to 60mA. It supports both analog and PWM dimming functions for precise brightness control. The component operates within an input voltage range suitable for various power sources and includes integrated current matching between the two strings. It is housed in a 12-pin MSOP package with an exposed pad for thermal management.

LED Driver IC Feature Summary

• Dual-output architecture with integrated current matching for balanced LED string driving
• Fixed high-frequency switching operation enabling compact external component sizing
• Supports combined analog and pulse-width modulation dimming techniques

LED Driver IC Applications

• Automotive exterior lighting systems requiring dual-channel regulation
• Industrial process automation illumination modules
• General industrial automation equipment signaling

LED Driver IC Procurement Notes

Verify that the specific suffix #PBF corresponds to the lead-free tube packaging variant rather than the tape and reel configuration. Confirm the exact pinout and thermal pad requirements against the official datasheet before integration. Ensure the supplier source provides valid traceability documentation for automotive-grade applications if required by the end-use specification.

LED Driver IC Selection Notes

Select this component when a single-chip solution is needed to drive two separate LED strings from a boost topology. It is appropriate for designs where space constraints favor a fixed 2MHz frequency over adjustable options. Consider the maximum output voltage capability relative to the series LED count. Evaluate the thermal performance of the MSOP-EP package against the expected ambient operating conditions.

LED Driver IC Part Context

This part belongs to the LT3909 family of LED drivers from Analog Devices. It is distinct from other LT39xx series components which may offer different topologies such as buck or buck-boost converters. The EMSE designation indicates the specific 12-pin MSOP package style. It serves as a specialized regulator for multi-string LED arrays rather than general-purpose power supply regulation.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.