[vcf-midatlantic] [off topic] - GaN USB chargers and temps

[John Heritage]

Hey folks -

Looking for some insight from the hardware inclined here.

GaN USB chargers are touted as being able to deliver higher power in
smaller form factors (I.e. charging a 65W USB device while the size of a
“standard silicon” ~ 10-20W USB charger).

I know on paper GaN can run a lot hotter successfully than silicon (>150C
for example), but I’m wondering - when you have a GaN USB charger that runs
pretty hot for long period of time, is it really safe?   Aren’t there
likely other components in the charger that don’t have the increased heat
tolerance of GaN semiconductors?

I’m asking as one of my GaN chargers gets hot enough to the point that I’d
be really worried with a traditional PSU.  It only happens if I had two
devices attached that need a full charge - once they’re topped off or
higher up in charge temperature is no issue.

Thanks,
John