LM3551SDX

LED Driver IC Overview

The LM3551SDX is a step-up (boost) LED driver IC manufactured by Texas Instruments. It operates with an internal switching frequency of 1.25MHz and supports a maximum output current of 1A in flash mode. The device is housed in a WSON-14 package, designed for compact LED lighting applications requiring regulated constant current drive.

LED Driver IC Feature Summary

• Integrates a high-frequency boost converter topology for efficient power conversion
• Provides regulated constant current output suitable for driving single or multiple LEDs
• Features a compact surface-mount package design to minimize board space

LED Driver IC Applications

• Flash LED drivers for mobile devices
• Camera module illumination systems
• Compact portable lighting solutions

LED Driver IC Procurement Notes

Verify the specific suffix 'SDX' against the official Texas Instruments datasheet to confirm pinout and thermal pad configuration. Ensure the component meets RoHS compliance requirements if specified for the target assembly. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components, as this part may have limited availability or obsolescence status.

LED Driver IC Selection Notes

Select this component when a small form factor boost regulator is required for flash LED applications. The 1.25MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 1A output limit and ensure it aligns with the forward voltage and current requirements of the intended LED array within the available input voltage range.

LED Driver IC Part Context

This part belongs to the LM355x series of LED drivers from Texas Instruments. It shares architectural similarities with other members like the LM3553 but differs in specific control interfaces and output capabilities. The SDX designation indicates a specific tape-and-reel packaging format optimized for automated surface-mount assembly processes.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing bill of materials before considering alternative manufacturers.