TLC5951DAPR

Overview

The TLC5951DAPR is a 24-channel, 12-bit PWM LED driver manufactured by Texas Instruments. It features 7-bit dot correction and 8-bit global brightness control for precise color and intensity management. The device operates on a serial data input with a maximum clock frequency of 30 MHz. It supports an input voltage range of 3 V to 5.5 V and provides constant current outputs up to 40 mA per channel. The component is housed in a 38-pin HTSSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 12-bit PWM resolution with 7-bit per-channel dot correction for accurate color uniformity.
• Includes diagnostic capabilities such as LED open detection and short-to-ground fault flags.
• Supports high-speed serial interface operation at frequencies up to 30 MHz.

Applications

• High-density LED backlighting systems
• LED display modules requiring color calibration
• General-purpose LED lighting drivers

Procurement Notes

Verify the specific suffix 'DAPR' corresponds to the tape-and-reel packaging variant rather than the tube-packaged 'DAP'. Confirm that the 38-pin HTSSOP footprint matches the target PCB layout. Ensure the design accommodates the specified 3 V to 5.5 V supply range and thermal requirements for the operating environment.

Selection Notes

Select this component when 24 individually controllable channels are required with high-resolution dimming. It is suitable for designs needing integrated error detection without external microcontrollers for basic diagnostics. Consider the HTSSOP-38 package constraints for board space and thermal dissipation relative to alternative packages like VQFN.

Part Context

This part belongs to the TLC5951 family of LED drivers from Texas Instruments. It shares core functionality with variants such as the TLC5951DAP and TLC5951RHAT, differing primarily in packaging type and reel specifications. The series is designed for applications demanding precise LED current control and fault monitoring.

Replacement Considerations

The TLC5951DAP is a pin-compatible alternative available in tube packaging instead of tape-and-reel. Verify if the change in packaging affects handling procedures or reflow profiles for the manufacturing process.

FAQ

Does the TLC5951DAPR support LED short-to-ground detection?

Yes, the device includes hardware-based fault detection for LED shorts to ground and open circuits.

What is the maximum serial clock frequency for data input?

The serial data input supports clock frequencies up to 30 MHz.