LM3411M5-3.3

Overview

The LM3411M5-3.3 is a constant current LED driver controller manufactured by National Semiconductor, now part of Texas Instruments. It is designed to drive high-power LEDs with precise current regulation. The device operates from a wide input voltage range and supports various topologies including boost, buck, and SEPIC configurations. It features an internal oscillator for frequency setting and includes protection mechanisms such as thermal shutdown and open/short circuit detection. The M5 package indicates a small outline transistor (SOT-23) surface-mount footprint, suitable for space-constrained applications requiring efficient LED lighting solutions.

Feature Summary

• Provides constant current regulation for high-power LEDs
• Supports multiple converter topologies including boost and buck
• Includes integrated thermal shutdown protection
• Features open and short circuit detection capabilities

Applications

• High-power LED lighting modules
• Portable device backlighting systems
• Automotive interior lighting applications

Procurement Notes

Verify the manufacturer source carefully as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix 'M5-3.3' matches your board design requirements. Confirm availability through authorized TI distributors. Check for updated datasheets reflecting any design changes post-acquisition. Validate pinout compatibility if replacing older components.

Selection Notes

Select this component when precise LED current control is required in compact designs. Consider the operating voltage range relative to your LED string configuration. Evaluate the thermal performance needs given the SOT-23 package size. Compare efficiency requirements against other available LED driver controllers. Ensure the switching frequency settings align with your passive component constraints.

Part Context

This part belongs to the LM341x family of LED drivers, which are widely used in general illumination and display backlights. The LM3411 specifically targets single-ended primary-inductor converter (SEPIC) and boost applications. It is part of National Semiconductor's portfolio before the Texas Instruments acquisition, maintaining compatibility with legacy designs while offering modern efficiency features.

Replacement Considerations

Direct replacements may include LM3410 or LM3412 variants depending on topology needs. Verify pin-to-pin compatibility with LM3411M5/NOPB equivalents. Check for updated Texas Instruments versions with identical specifications. Ensure alternative parts support the same input voltage range and current capabilities.