Texas Instruments TLC6946DBQR

In high-density, fine-pitch LED panel applications, the performance demand formulti-channel LED drivers is increasing to achieve high multiplexing, high PWM resolution, and highrefresh rates. To meet strict display quality requirements, the LED drivers must have the abilityto solve various issues in different LED-matrix application scenarios.

The TLC694x device is a 16-channel, constant-current-sink LED driver. Each channel has anindividually adjustable 65,536 steps of PWM grayscale control. The maximum constant-current valueof all 16 channels is set by a single external resistor with 128 steps of global brightness controlfrom 0.3 mA to 25 mA.

The TLC694x device integrates enhanced circuits to solve the various display issues infine-pitch LED display applications: the low-grayscale uniformity issue, coupling issue, ghostingissue, and caterpillar issue.

The TLC694x device features an LED-open detection function, and the error detectionresults can be read via a serial data interface port. Thermal shutdown and IREF resistor shortprotection ensure a higher system reliability. The TLC694x device also has an smart power-save modethat sets the total current consumption to 1 mA (typical) when all outputs are off.