LM27965SQ-M

Overview

The LM27965SQ-M is a dual display white LED driver IC manufactured by National Semiconductor, now part of Texas Instruments. It integrates a switched capacitor (charge pump) topology to drive up to nine output channels with a constant current of 30mA per channel. The device operates within an output voltage range of 2V to 4V and supports I2C-compatible brightness control for precise dimming applications. Designed for surface-mount installation in a 24-WQFN package, it functions reliably across a temperature range of -30°C to +85°C.

Feature Summary

• Integrates dual display white LED driver capabilities with I2C compatible brightness control interface
• Utilizes switched capacitor charge pump topology for efficient DC-DC regulation
• Supports multi-channel output configuration suitable for complex backlight arrays

Applications

• Dual display white LED backlight systems
• Portable electronic devices requiring I2C controlled illumination
• Embedded lighting solutions in consumer electronics

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Ensure the specific suffix matches your supply chain requirements. Confirm availability status directly with authorized distributors, as this component may be subject to lifecycle changes or obsolescence notices. Cross-reference datasheet revisions to ensure compatibility with existing design specifications.

Selection Notes

Select this component when designing systems requiring independent control of dual display LED strings via a serial interface. The integrated charge pump eliminates the need for external inductors, simplifying PCB layout. Consider the 30mA output current limit and the 2V-4V output voltage window to ensure proper LED string sizing. Verify that the I2C address configuration meets system bus requirements.

Part Context

This component belongs to the LM27965 series of LED drivers designed for portable applications. It represents the transition period where National Semiconductor branding was still present on parts produced under Texas Instruments ownership. The SQ-M variant specifically denotes the package type and manufacturing lot characteristics associated with the original National Semiconductor production line.

Replacement Considerations

The LM27965SQX/NOPB and LM27965SQ/NOPB are functionally equivalent alternatives from Texas Instruments. These parts share identical electrical specifications and pinouts. Verify that the NOPB suffix indicates lead-free compliance if required by your assembly process.