RE: MOSFET Cooling

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mccauley, Daniel H by way of Terry Fritz <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>



Yes, I too have to heatsink and cool my TC442x driver ICs.  With the big
capacitance of the IXFN24N100, they do heat up
quite a bit at 200kHz ! !!

The Captain


 > Hi Matthew and All,
 >
 > I've never used these on big power semiconductor, but I'm sure it
 > would work. Might be a little difficult to mount...
 >
 > One thing I HAVE used them for, is to heatsink the little 8PDIP gate
 > drive IC's MAX/TC4420 and MAX/TC4429. When arranged as a
 > double-H-bridge, you get an arrangement of four of these IC's that
 > are an inch or so apart from each other.
 >
 > That's where you can put a bolt right in the middle of them, and
 > press a processor heatsink down on all 4 IC's. Each IC must be
 > perfectly flat, and a little dab of silicone-heat-grease is
 > necessary. This was a friend's (Aron's) idea, a great one at that in
 > my opinion. It keeps those flaming IC's running ice cold ; ) although
 > I have moved away from them. I use a discrete MOSFET driver for
 > driving big MOSFET's...but this isn't a MOSFET driving thread.
 >
 > Take care,
 >
 > Justin Hays
 > KC5PNP
 > Email: justin-at-hvguy-dot-com
 > Website: www.hvguy-dot-com
 >
 > =====
 > Justin Hays
 > KC5PNP
 > Email: justin-at-hvguy-dot-com
 > Website: www.hvguy-dot-com
 >
 >