PCA9956ATWY

Overview

The PCA9956ATWY is a linear LED driver IC manufactured by NXP USA Inc., designed for backlight applications. It features 24 independent outputs with a maximum current of 65mA per channel. The device supports linear PWM dimming and operates on a supply voltage range of 3V to 5.5V. It utilizes an I2C interface for control and is housed in a 38-HTSSOP package with exposed pad.

Feature Summary

• Provides 24 individually controllable constant-current LED outputs
• Supports linear pulse-width modulation (PWM) dimming for brightness control
• Integrates internal switches for direct LED driving capability

Applications

• Backlight systems for displays

Procurement Notes

Verify the specific suffix 'A' against official documentation, as it may indicate a distinct version or configuration compared to standard variants. Confirm the exact package dimensions and thermal requirements for the 38-HTSSOP form factor during integration. Ensure compatibility with the system's I2C bus voltage levels and address settings before finalizing procurement.

Selection Notes

Select this component when a high-channel-count LED driver with integrated switching is required for backlighting. The 65mA output current suits medium-brightness LED arrays. Verify that the linear PWM architecture meets the system's flicker-free dimming requirements and that the I2C interface aligns with the host controller's communication protocol.

Part Context

This part belongs to the PCA9956 family of LED drivers from NXP Semiconductors. These devices are engineered for display backlighting, offering multiple channels and precise current control. The family typically includes variants with different pin counts and interfaces to accommodate various display sizes and system constraints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.