PCA9634PW/S910,118

Overview

The PCA9634PW/S910,118 is an I2C-bus controlled 8-bit LED driver optimized for RGBA color mixing applications. It features eight open-drain outputs with 25 mA sink capability at 5 V and operates within a supply voltage range of 2.3 V to 5.5 V. The device includes individual 8-bit PWM controllers for each output operating at 97 kHz, alongside a group PWM controller for unified dimming or blinking. It supports Fast-mode Plus (Fm+) I2C interface up to 1 MHz and allows software programmable addressing.

Feature Summary

• Provides independent 8-bit PWM brightness control for each of the eight LED outputs
• Supports unified dimming and blinking via a separate group PWM controller
• Features Fast-mode Plus I2C interface for high-frequency bus communication
• Allows asynchronous external control through the active-low Output Enable pin

Applications

• RGBA color mixing in lighting systems
• LED backlighting for displays
• Architectural accent lighting control

Procurement Notes

Verify component authenticity and datasheet alignment before integration. Confirm package integrity and moisture sensitivity level handling procedures during storage and assembly. Ensure compatibility with existing I2C bus topology and voltage levels. Review end-of-life status implications for long-term production planning.

Selection Notes

Select this component when independent channel brightness adjustment is required alongside global dimming capabilities. Suitable for designs needing Fm+ speed and multiple addressable devices on a single bus. Verify that the TSSOP20 package fits the PCB layout constraints and thermal requirements.

Part Context

This part belongs to the PCA9634 family of 8-bit LED drivers from NXP Semiconductors. It is designed for applications requiring precise LED intensity control via digital interfaces. The series supports various packaging options and addresses different manufacturing volume needs while maintaining consistent electrical performance characteristics.

Replacement Considerations

Check for form-fit-function compatible alternatives if this specific suffix variant is unavailable. Consider other PCA9634 variants with different packaging or tape-and-reel configurations. Verify that substitute parts maintain the same I2C protocol and current drive specifications.