Re: oscillation in high-voltage MOSFETS connected in series

colin wrote: 
"Winfield Hill" <hill_a@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:d9h0ct024j1@xxxxxxxxxxxxxxxxxx

colin wrote...

Also when TI avalanche rated darlingtons first came out I found
it hard to beleive they were so robust.

Did you ever use any of them? 


Not in the comercial product as they ended up being quite a bit more
expensive, also they were a triple darlington and device disipation went up
significantly, I ended up redisigning the product to use a cheap but robust
non darlington bipolar with a new IC that had an integrated antisaturation
driver, worked quite well :)

I used one of the samples in a electronic ignition circuit as thats what
they were actualy marketing them at.

Colin =^.^=

I started work at a drive company just after they stopped manufacturing their last bipolar drive (1993). The BJTs were also triple darlingtons, referred to as "tralingtons". The 600Arms drive was a beast, tralingtons switching at 2kHz from a 700Vdc bus. All wired with cable and crimps. The base drives supplied something like 100A.

Cheers
Terry
.

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