pms pd

I recently notice that the USB port (and the nearby area) of the PMS-PD rev3 in my Ashida becomes quite hot after ~30 min of gameplay, I mesured 45/46°C. Besides that it seems to work fine. Is it supposed to be normal or the PD is going to be fried soon?

Me and a fellow modder are working on a custom mini GameCube Console build kinda similar to the GameCube Nano and Micro but with a slightly bigger case to fit a regular OMGWTF Trimmed Wii and other basic custom PCBs. The goal is to make it the least difficult and open source build for beginners...