The
Data Sheet for the LPF drivers says the working temp is 40-70°C and at 90°C it shuts down and won't power up until restart. Sounds like it has thermal protection, not bad at all, but I'd hate to test it :P. Generally, the cooler you can keep electronics the longer they last, fans will help the whole system and are pretty cheap, I've got a couple 140mm fans that are expensive at $20 and are near silent.