TLC5951RHAR

Overview

The TLC5951RHAR is a Texas Instruments LED lighting driver IC featuring 24 constant-current sink channels. It provides 12-bit PWM resolution for precise brightness control and includes 7-bit dot correction to ensure uniform LED appearance. The device operates on a single supply voltage ranging from 3 V to 5.5 V and supports serial data input at frequencies up to 33 MHz. Packaged in a WQFN-40 format, it integrates fault detection capabilities including open and short-to-ground LED diagnostics.

Feature Summary

• Integrates 24 independent constant-current sink channels with 12-bit PWM resolution for high-fidelity LED dimming.
• Includes 7-bit per-channel dot correction memory to compensate for manufacturing variations and ensure visual uniformity across the array.
• Features built-in diagnostic logic for detecting LED open circuits and shorts to ground, reporting status via an error flag output.

Applications

• High-density LED display panels requiring precise grayscale and color consistency
• LED backlighting systems for monitors and televisions
• Architectural and general-purpose LED lighting fixtures

Procurement Notes

Verify the specific suffix RHAR corresponds to the WQFN-40 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure thermal management requirements align with the specified operating temperature range of -40°C to +85°C for the intended application environment.

Selection Notes

Select this component for designs requiring high channel density without external multiplexing. The integrated dot correction simplifies calibration processes compared to standard PWM drivers. Consider the WQFN-40 footprint constraints during PCB layout. Evaluate power dissipation limits relative to the number of simultaneously active channels and ambient thermal conditions.

Part Context

This part belongs to the TLC5951 family of 24-channel LED drivers. It shares functional similarities with other members like the TLC5951DAP but differs in packaging. The series is designed for applications demanding high refresh rates and accurate color reproduction in LED matrices.

Replacement Considerations

The TLC5951DAP serves as a pin-compatible alternative in a different package type. Verify electrical specifications and thermal performance match before substitution. No other direct substitutes are confirmed in public documentation.