stereodan
Member

Well, I think I learned an important lesson—The TLC5940s simply produce a massive amount of heat! I didn't see any hotspots on the Teensy itself...the TLCs however slowly warmed the entire board. It still doesn't...

Ah! The board outline I shared is of a later revision, where I flipped that around. Here's the correct outline for this board: I'm using NMOS, N7000, so I think it should be correct, no?

PDF attached. Yes, at 12V input I was at 100 mA and the Teensy was running at 85C and climbing. It's a very slow temp creep, over 10 minutes it goes from room temp to 90C.

All great questions! I've attached the schematic. The reason I included the PCB was because I suspect this is a physical heat transfer issue, not a circuit thing. For instance, when I raise the Teensy off the board...