LM3557SDX-2/NOPB

LED Driver IC Overview

The LM3557SDX-2/NOPB is a Texas Instruments DC-DC step-up converter designed for white LED backlight applications. It features an internal power switch with an output current capacity of 800mA and operates at a switching frequency of 1.2MHz. The device supports a maximum supply voltage of 7.5V. Packaged in an 8-WSON (3x3) format, it integrates boost topology to efficiently drive LEDs from lower input voltages.

LED Driver IC Feature Summary

• Integrates a high-efficiency step-up (boost) DC-DC regulator topology optimized for LED backlighting.
• Includes an internal power switch rated for 800mA output current to support direct LED driving.
• Operates at a fixed 1.2MHz switching frequency to minimize external component size.

LED Driver IC Applications

• White LED backlight drivers
• Mobile phone display illumination
• Portable electronic device lighting

LED Driver IC Procurement Notes

Verify the specific suffix '2' against the manufacturer's official documentation to ensure correct binning or configuration alignment. Confirm that the WSON package dimensions match the target PCB footprint requirements. Check for moisture sensitivity levels and reflow soldering profile constraints prior to assembly.

LED Driver IC Selection Notes

Select this component when a compact solution for white LED backlights is required. The 1.2MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure the input voltage range accommodates the battery or power source used in the application design.

LED Driver IC Part Context

This part belongs to the LM3557 series of LED drivers from Texas Instruments. It is specifically engineered for portable devices requiring efficient backlighting solutions. The SDX-2 variant indicates a specific tape-and-reel packaging configuration within the broader product family.

LED Driver IC Replacement Considerations

LM3557SD-2/NOPB