16-channel constant-current sink with shift-register control
The TLC59282DBQ is a linear LED driver from Texas Instruments, built around a shift-register topology that clocks in serial data at up to 35 MHz and latches it across 16 constant-current sink outputs. The 24-SSOP package (3.90 mm body width) keeps the board footprint compact for dense sign, display, or indicator arrays where 16 individually dimmable channels are needed per IC.
Output ratings and thermal limits for the BOM
With 16 outputs each at 45 mA, the total sink current is 720 mA — the 24-SSOP's thermal resistance (approx 100 °C/W junction-to-ambient on a standard 2-layer board) means the die temperature stays below 85 °C at 25 °C ambient, but at 85 °C ambient the margin to the 150 °C abs-max junction is tight; a 4-layer board with thermal vias under the package improves headroom. The 35 MHz shift-register clock supports high refresh rates — at 35 MHz the 16-bit data load takes under 500 ns, leaving the bulk of the frame time for PWM dimming duty cycles.