uoficowboy
Full Member level 3
- Joined
- Apr 4, 2009
- Messages
- 169
- Helped
- 6
- Reputation
- 12
- Reaction score
- 5
- Trophy points
- 1,298
- Location
- Seattle, Wa, USA
- Activity points
- 2,964
Usually this should be included in the datasheet.I had trouble finding SOA curves for BJTs.
Hi,
Usually this should be included in the datasheet.
Which device (datasheet) particularly are you looking at?
Klaus
I doubt that. Can you tell me the part number ?The 40V FET I'm looking at can handle 600A for short durations (dependent on Vds, of course)
I doubt that. Can you tell me the part number ?
To dampen a power peak on the transistor itself, I would look for some that had a metal body as thick and wide as possible, as this would be the first thermal barrier to be traversed by the heat emanating from the p-n junction toward dissipator. In any case, by the extreme requirements presented above, it would be more plausible to consider an intermediary device to dissipate some of that energy.
O.K. I saw afterwards that the MOSFET is a low voltage one.
Anyway, you can see that the graph is for Tc=25ºC. So you need to derate your peak current.
So you want SOA in BJTs ? See e.g. this one. You can find many more using the manufacturer's selection guide/web selection tools.
https://www.onsemi.com/pub/Collateral/2N6338-D.PDF
If the die size were often available on datasheets this would be a feature easiest to be assessed, although heating effectively happens most at the p-n junction; at least the metal case is something we can see; Anyway, if I'm not wrong, silicon is not so good thermal conductor as the metal of its package.I think the size of the silicon is more important than the size of the body, no? That had always been my impression
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?