[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: DRSSTC thoughts...
Original poster: "Jimmy Hynes" <JPHynes-at-gmail-dot-com>
>If only the bigger IGBTs could withstand such abuse. I only run my
>CM300s at 2X their peak rating
Who say's they can't? I don't!
>50V is the "killer" there.... But above 30V does no addled good...
I can't find it now, but I had an application note that said the 50%
failure point was around 70-80v
>"Top of die" heat sinking is typically a "giant" disaster in the
>industry... Cray tried it but.... Disaster... Best to use old "thin die"
>bottom thermal dissipation teck there... Happily, within reach of
>"basement shops" these days ;-)))
Prolly still tough, but the idea was to put a piece of copper on it
for sucking up transients. it doesnt really have to move any net heat
out, jut to make it have more thermal capacitance
>About the cooling issues, especially the die's, and whole devices, I like
>water cooling
The problem was allowing the die to suck up more energy during the
short bursts. Getting the heat out of the heatsink is not a problem at
all here.