Hi all. I'm making a project for which I need a small number of coloured LEDs, 9 in total to fit a 'found' reflector with LED shaped holes in it, from an old torch. My question revolves on the TLC5940 I'm planning on using to drive them, just to make things easy for myself, with the 5940 being controlled by a Uno. If I use 3 each of 3 colours in series, and power each series string with, say, 12V, then sinking into the 5940, I'm assuming that all will be well, and that is how the 5940 is meant to be used? Each coloured string will have a different voltage drop across it, I realise, but being a constant current device I'm assuming that the 5940 is designed to accommodate exactly this situation (?) I'm making a lot of assumptions here..
I wonder how far that can be pushed.. my '12V' supply is actually running about 16V, and so far the Uno and the main 12V white LED haven't burned up. It'd be very easy to add a little DC-DC converter to get an exact 12V if needed. Is this the 17V LED voltage max mentioned on the 5940 data sheet?