TITLC5955RTQR
Overview
The TLC5955RTQR is a high-performance 48-channel constant-current sink LED driver featuring 16-bit PWM grayscale control for fine brightness adjustment. It supports a wide array of dot correction, global brightness, and maximum current settings, making it an ideal choice for high-density LED displays requiring precise color and luminance uniformity. Each of the 48 channels can be independently controlled through a high-speed serial interface.
Why Choose This Part
The 48-output configuration significantly reduces the number of driver ICs needed for large arrays, while the 16-bit grayscale resolution enables smooth color transitions without visible stepping. Integrated features like delay switching minimize inrush current during high-frequency PWM operation, and dedicated 7-bit dot correction allows for factory-level calibration of LED luminance variances.
Applications
Key Specifications
Getting Started
To evaluate this part, use the TLC5955EVM evaluation module which provides a USB interface for PC-based control. Designers should focus on thermal management of the 56-VFQFN exposed pad, as driving 48 channels at up to 32mA can generate significant heat. Implement the serial interface using a high-speed SPI or specialized shift-register peripheral on an MCU capable of handling the 33 MHz GSCLK requirements.
