16-channel constant-current sink at 35 mA per channel
The Texas Instruments TLC5928PWR is a linear LED driver IC that integrates a 16-bit shift register and constant-current sink outputs. Each of the 16 channels delivers up to 35 mA, set by an external resistor, with the output stage rated to 17 V for driving series LED strings. The shift register clocks at 35 MHz, enabling fast data updates for multiplexed or PWM-dimming applications. Supply range is 3 V to 5.5 V, and the device operates over -40 °C to 85 °C ambient, suiting it for indoor signage, industrial panel indicators, and general-purpose constant-current LED control.
Shift register topology and 35 MHz clock — what it means for your update rate
The TLC5928PWR uses a shift-register interface (data in, clock, latch, output enable) rather than a serial bus like I²C or SPI. The 35 MHz clock rate means you can shift in 16 bits of data in under 500 ns, then latch and update all outputs simultaneously. This is fast enough for 8-bit PWM dimming at several kHz per channel without visible flicker, provided the host MCU can feed the data stream. The open-drain outputs sink current, so the LED common anode connects to a supply up to 17 V.
Active lifecycle — no last-time-buy pressure
The TLC5928PWR carries an Active product status, meaning Texas Instruments continues to manufacture and support the part. There is no announced end-of-life or last-time-buy window. For production planning, this removes the urgency to stockpile or qualify a replacement. The part is ROHS3 compliant and ships in Tape & Reel or Cut Tape options for the 24-TSSOP package.