I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing?
Was looking at this driver:
http://www.ti.com/lit/ds/symlink/tlc5917.pdf
The LEDs on keypad are
http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf
The circuit is setup like
<!-- Begin schematic: In order to preserve an editable schematic, please
don't edit this section directly.
Click the "edit" link below the image in the preview instead. -->
<!-- End schematic -->