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
    39
    0
    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
    4,846
    63
    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.
     
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