LM3552SDX

LED Driver IC Overview

The LM3552SDX is a white LED driver IC manufactured by Texas Instruments, designed for high-efficiency flash applications. It operates within an input voltage range of 2.7 V to 5.5 V and delivers a regulated output current of 1 A. The device utilizes a boost DC-DC converter topology with an internal switch, operating at a switching frequency of 1.25 MHz. It is housed in a compact 14-WSON (4x4 mm) package with exposed pad for surface mount installation. The component supports analog dimming and includes built-in flash timeout protection to ensure safe operation during pulsed lighting tasks.

LED Driver IC Feature Summary

• Integrated boost DC-DC converter with internal power switch for efficient LED driving
• Flash timeout protection mechanism to prevent thermal overload during operation
• Supports analog brightness control for precise light intensity adjustment

LED Driver IC Applications

• Camera flash systems
• Mobile device illumination
• Compact LED lighting modules

LED Driver IC Procurement Notes

Verify the obsolete status of this specific part number before procurement planning. Confirm availability of alternative packages or updated series components from Texas Instruments. Ensure compatibility with existing PCB footprints if substituting. Check for moisture sensitivity handling requirements during storage and assembly processes. Validate that the 14-WSON package dimensions meet the design constraints.

LED Driver IC Selection Notes

Select this component for designs requiring a single-channel 1A LED driver with integrated boost regulation. Consider the 1.25 MHz switching frequency for EMI management and passive component sizing. Evaluate the 2.7 V to 5.5 V input range against the system's power supply capabilities. Assess the need for flash timeout protection features in the target application environment.

LED Driver IC Part Context

The LM3552 belongs to Texas Instruments' family of LED lighting drivers, specifically engineered for portable electronics. It complements other models like the LM3553 by offering a single-channel solution optimized for space-constrained devices. The WSON packaging allows for minimal board area usage compared to larger traditional packages.

LED Driver IC Replacement Considerations

The LM3552SDX is listed as obsolete. Potential substitutes include the LM3552SDX/NOPB or alternative packages such as LM3552SDDKR. Verify pinout compatibility and electrical specifications when transitioning to these alternatives.