LED driver IC for common-cathode display?

Thread Starter


Joined Jan 26, 2009
I've been using the Allegro A6279 LED driver and it's great. Drives 16 LEDs, has a latched serial-input shift register, and built in current-limiting resistors.

However, it seems like it's only designed for common-anode LED displays. I have some old displays that I want to use in a project, but they're common-cathode. I really like the A6279 because it saves me from using lots of discrete components; can it work for a common-cathode display? If not, is there a similar part (serial-input, constant-current) that can act as a source driver?


Joined Feb 4, 2008
You can use NOT gates on its outputs and drive a common cathode display. However, you will loss the current controlled outputs and the open LED detection.