LM3411N-3.3

Overview

The LM3411N-3.3 is a constant current LED driver manufactured by National Semiconductor, now part of Texas Instruments. It operates as a buck converter to regulate current through high-power LEDs. The device integrates a 0.5A switch and supports input voltages up to 60V. It features an internal reference voltage for precise current control via an external sense resistor. The component is housed in a standard DIP-8 package suitable for through-hole mounting.

Feature Summary

• Integrates a power switch for simplified circuit design
• Provides constant current regulation for LED loads
• Supports wide input voltage range operation

Applications

• High-power LED lighting systems
• LED backlighting drivers
• General-purpose constant current sources

Procurement Notes

Verify the manufacturer lineage as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix 'N-3.3' matches the required pinout and thermal characteristics. Ensure the datasheet corresponds to the legacy National Semiconductor documentation or the updated TI equivalent specifications.

Selection Notes

Select this component when a simple buck topology is required for driving LEDs from higher voltage rails. Consider the maximum input voltage limit and the integrated switch current rating relative to the target LED string requirements. Evaluate thermal performance based on the expected power dissipation in the chosen package.

Part Context

This part belongs to the LM341x family of LED drivers designed for efficient power conversion. The series offers various configurations for different LED driving needs. The LM3411 variant specifically focuses on basic buck conversion with integrated switching capabilities for cost-effective designs.

Replacement Considerations

Check for direct equivalents within the Texas Instruments portfolio following the acquisition. Verify pin compatibility and electrical parameters against other LM341x variants or similar buck LED drivers from alternative manufacturers.