TLC5944PWPR

Overview

The TLC5944PWPR is a Texas Instruments LED display driver featuring 16 channels with 12-bit PWM grayscale control. It operates within a 3 V to 5.5 V supply range and utilizes an HTSSOP-28 package. The device supports serial data input for daisy-chaining multiple units. Key electrical specifications include a maximum power dissipation of 3.958 W and a maximum supply current of 60 mA. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates 6-bit dot correction via EEPROM for precise per-channel luminance uniformity.
• Includes pre-charge FETs to manage inductive load currents during switching transitions.
• Provides fault detection capabilities including open and short circuit monitoring for each output channel.

Applications

• High-resolution LED matrix displays requiring precise grayscale control
• LED backlighting systems for portable electronic devices
• General-purpose LED lighting arrays with daisy-chain connectivity

Procurement Notes

Verify the specific suffix 'PWPR' confirms the tape-and-reel packaging format, distinct from tube-packaged variants like 'PWP'. Ensure compatibility with moisture sensitivity levels and reflow soldering profiles specified in the official datasheet. Confirm that the ordering part number matches the exact package dimensions and pinout requirements for the target PCB design.

Selection Notes

Select this component when 16 independent PWM channels with high resolution are required. The integrated dot correction simplifies hardware calibration compared to non-corrected drivers. Consider the thermal performance and power dissipation limits if driving high-current loads without external heat sinking.

Part Context

This part belongs to the TLC5944 series of LED drivers from Texas Instruments. It shares functional similarities with the TLC5945 but lacks internal IREF setting resistors. The PWPR suffix indicates a reel-based manufacturing format suitable for automated surface-mount assembly processes.

FAQ

How does the TLC5944PWPR handle LED brightness uniformity?

It uses built-in 6-bit dot correction stored in EEPROM to adjust individual channel currents, compensating for LED variations.

What interface is used to control the TLC5944PWPR?

The device accepts serial data input, allowing multiple units to be daisy-chained for controlling large LED arrays.