TLC5957RTQR

Overview

The TLC5957RTQR is a Texas Instruments LED lighting driver IC featuring 48 constant current sink channels with 16-bit grayscale PWM dimming. It operates on a single supply voltage ranging from 3 V to 5.5 V and delivers an adjustable output current up to 25 mA per channel. The device utilizes a serial interface for data input and includes internal error flagging capabilities. Packaged in a 56-pin QFN (8x8 mm) with an exposed thermal pad, it supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 48 independent constant current sink channels with 16-bit PWM resolution for precise grayscale control.
• Features internal error detection mechanisms including open LED and short-to-ground fault flags accessible via the serial interface.
• Supports high-speed serial data transfer through standard SPI-compatible inputs for efficient daisy-chaining.

Applications

• High-density LED matrix displays
• Signage and advertising boards
• Architectural accent lighting systems

Procurement Notes

Verify the specific suffix RTQR against official Texas Instruments documentation to confirm the reel packaging configuration and tape dimensions. Ensure compatibility with your PCB footprint by referencing the latest mechanical drawing for the 56-QFN package. Confirm RoHS compliance status directly with the manufacturer's current product information sheet before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring high channel density without external multiplexing. The 16-bit resolution suits applications demanding smooth gradient transitions. Consider the 56-QFN package constraints regarding thermal dissipation and soldering profiles during layout. Verify that the host microcontroller can support the required serial clock speeds for the desired refresh rates.

Part Context

This part belongs to the TLC5957 family of LED drivers designed for complex lighting applications. It serves as a bridge between low-voltage digital logic and high-current LED loads. The device simplifies board design by integrating both grayscale and brightness control functions into a single integrated circuit solution.

Replacement Considerations

Consult the Texas Instruments TLC5957 family comparison table for verified pin-compatible or functionally equivalent alternatives such as the TLC5957RTQT or other members within the same series. Cross-reference datasheets to ensure identical electrical characteristics and package dimensions before substitution.