LM27964SQX-A/NOPB

Overview

The LM27964SQX-A/NOPB is a white LED driver system featuring I2C-compatible control and a switched capacitor topology. It provides seven independent constant current outputs, each capable of delivering up to 180 mA. The device operates within an input voltage range of 2.7 V to 5.5 V and supports switching frequencies between 500 kHz and 900 kHz. Designed for portable applications, it functions reliably across temperatures from -30°C to +85°C. Housed in a WQFN-24 package, this IC integrates advanced dimming capabilities suitable for high-performance backlighting solutions.

Feature Summary

• Integrates seven independent output channels for individual LED control
• Supports I2C-compatible digital interface for precise configuration and dimming
• Utilizes switched capacitor charge pump topology for efficient power conversion
• Enables high-resolution dimming through dedicated digital control protocols

Applications

• Smartphone display backlighting systems
• Tablet computer screen illumination
• Portable media player backlight drivers
• Mobile communication device lighting modules

Procurement Notes

Verify the specific suffix 'A' against official Texas Instruments documentation to confirm functional variations or revision levels. Ensure the WQFN-24 package dimensions align with PCB layout requirements. Confirm RoHS compliance status via the manufacturer's datasheet before finalizing procurement specifications.

Selection Notes

Select this component when designing multi-channel LED backlighting architectures requiring digital I2C integration. The seven-output configuration suits complex display panels needing independent zone control. Evaluate the 180 mA per channel limit against total luminance requirements. Consider the charge pump efficiency relative to battery life constraints in portable devices.

Part Context

This part belongs to the LM27964 series of LED drivers from Texas Instruments. It complements other models like the LM27965 and LM27966 by offering a specific seven-channel configuration optimized for high-density backlighting. The series shares common I2C control features but differs in output count and topology.

Replacement Considerations

The LM27964SQ/NOPB serves as a direct pin-compatible alternative within the same family. Verify if the 'A' suffix denotes a specific revision or variant that requires distinct firmware or hardware adjustments compared to the standard version.