LP55281RLX/NOPB

LED Driver IC Overview

The LP55281RLX/NOPB is a quadruple RGB LED driver for handheld devices, driving four RGB LED sets and one fun-light LED. It features an integrated boost converter with a maximum output voltage of 5.3 V and peak current of 300 mA. The device supports SPI and I2C interfaces for control. Operating from a supply voltage between 3 V and 5.5 V, it functions within a temperature range of -30°C to +85°C. Packaged in a 36-DSBGA (3.5x3.24 mm) format, it includes internal programmable constant current sources.

LED Driver IC Feature Summary

• Integrates a high-efficiency DC-DC step-up (boost) regulator to drive multiple LED channels.
• Supports digital interface control via SPI or I2C protocols for configuration and dimming.
• Provides independent constant current regulation for each of the twelve output channels.

LED Driver IC Applications

• Handheld device backlighting
• General LED lighting including down-lights and ceiling lights
• Medical surgery lighting systems

LED Driver IC Procurement Notes

Verify component authenticity through authorized Texas Instruments distributors or certified partners. Confirm package marking and date codes against official documentation. Note that this specific part number is listed as obsolete; ensure availability of alternative sources or valid stock verification before procurement planning.

LED Driver IC Selection Notes

Select this component for applications requiring compact multi-channel RGB control with integrated power regulation. Consider the DSBGA package size constraints and thermal management requirements. Verify interface compatibility with the host microcontroller's SPI or I2C capabilities during system design.

LED Driver IC Part Context

This IC belongs to the LP55281 series of PMIC solutions designed for complex LED management. It consolidates power conversion and driver functions into a single small footprint, reducing bill-of-materials count compared to discrete solutions. The series targets portable electronics where space efficiency is critical.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product status is marked as obsolete, consult Texas Instruments directly for potential end-of-life alternatives or next-generation replacements.

LED Driver IC FAQ

What communication interfaces does the LP55281 support?

The device supports both Serial Peripheral Interface (SPI) and Inter-Integrated Circuit (I2C) digital interfaces for control and configuration.

Can this driver operate without an external inductor?

No, the integrated boost converter requires an external inductor to function correctly as a step-up regulator.