SLVSEB3A June 2018 – January 2019 TLC6946 , TLC6948
PRODUCTION DATA.
The TLC694x device is a 16-channel constant-current-sink LED driver supporting 1- to 32-, 48-multiplexing. Each channel has an individually adjustable 65,536-step pulse-width modulation (PWM) grayscale (GS) control. The TLC6946 device implements 16-Kbit display memory and the TLC6948 device implements 24-Kbit display memory to increase the visual refresh rate and to decrease the grayscale data-writing frequency.
The TLC694x device supports current from 0.3 mA to 25 mA for each channel, with typical 1% channel-to-channel current deviation and typical 1% device-to-device current deviation. The maximum current value of all 16 channels is set by an external IREF resistor and can be adjusted by the 128-step global brightness control (BC). The device also implements low-grayscale enhancement technology to solve the coupling issue and improve the display quality in low-grayscale conditions. These features make the TLC694x device a candidate for high-density-multiplexing LED-matrix-display and LED-panel applications.
The TLC694x device integrates enhanced circuits to solve the various display issues in fine-pitch LED display applications: the low-grayscale uniformity issue, coupling issue, ghosting issue, and caterpillar issue. The TLC694x device features an LED-open detection function, and the error detection results can be read via a serial data-interface port. Thermal shutdown and IREF-resistor short protection ensure a higher system reliability. The TLC694x device also has a smart power-save mode that sets the total current consumption to 1 mA (typical) when all outputs are off.