LED driver IC for common-cathode display?

Discussion in 'General Electronics Chat' started by autorelease, May 11, 2009.

  1. autorelease

    Thread Starter Active Member

    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?
  2. mik3

    Senior Member

    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.