PCA9955ATW/Q900J

Overview

The PCA9955ATW/Q900J is a 16-channel constant current LED driver IC manufactured by NXP USA Inc. It features an I2C interface for control and operates within a supply voltage range of 3 V to 5.5 V. The device provides adjustable output currents up to 57 mA per channel and supports both boost and buck topologies. It is housed in a 28-lead HTSSOP package and functions as part of the PCA9955 series, designed for LED lighting applications requiring precise current regulation.

Feature Summary

• Integrates 16 independent constant current channels for uniform LED brightness control
• Supports flexible power management with integrated boost and buck converter topologies
• Utilizes standard I2C bus communication for simplified system integration and control

Applications

• General LED lighting systems requiring multi-channel current regulation
• Backlighting drivers for displays utilizing I2C control interfaces
• LED illumination modules in consumer electronics and industrial equipment

Procurement Notes

Verify the specific suffix 'Q900J' against official NXP documentation to confirm tape-and-reel packaging specifications and RoHS compliance status. Ensure the selected variant matches the required operating temperature range and package dimensions for your PCB layout. Cross-reference the datasheet revision history to validate electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require high channel density with minimal external components. The integrated boost and buck capabilities allow for efficient power conversion across varying LED forward voltages. Consider the 28-lead HTSSOP package constraints for thermal management and board space availability during the initial schematic capture phase.

Part Context

This device belongs to the PCA9955 family of LED drivers from NXP Semiconductors. It shares functional similarities with other models in the series but is distinguished by its specific package configuration and manufacturing lot codes. The ATW/Q900J designation indicates a particular version optimized for surface-mount assembly and standardized industrial testing protocols.

Replacement Considerations

The PCA9955BTW/Q900J is a confirmed substitute within the same product family. Verify pin compatibility and electrical parameter alignment before swapping components in existing designs.