Author Topic: Lets see ... datasheet errors ... (or likely ones ... )  (Read 295 times)

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Offline 3roomlab

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Lets see ... datasheet errors ... (or likely ones ... )
« on: June 12, 2019, 08:47:40 pm »
I want to kick off this with infineon mosfets

numbers are taken from SOA chart 1ms @ 20V

AUIRF1324S-7P SOA =42A (D2PAK 7pin)
DMN6068 SOA =7A (DPAK)
AUIRFR8405 SOA = 30A (DPAK)
AUIRFSA8409-7P SOA = 4.5A (D2PAK 7pin)
AUIRFS8407 SOA = 40A (D2PAK)

I am thinking, the 8405 and 8409 specs are wrong and should be

AUIRFR8405 SOA = 3A (DPAK)
AUIRFSA8409-7P SOA = 45A (D2PAK 7pin)

any thoughts?
and feel free to share any other errors/ambiguities
spheres of influence, example linustechtips. can you feel the brainwashing? showing off equipment, etc. were you swayed and baited? with immense popularity (and social "titles"), can you afford to disagree?
 

Offline 741

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Re: Lets see ... datasheet errors ... (or likely ones ... )
« Reply #1 on: June 12, 2019, 09:19:34 pm »
Just grabbed the DS {AUIRFR/U8405 12 2017-10-04}. The corner of the 1mS curve,  Fig 8, at 20V looks like 30A.

That said, they own up to a mistake on that figure in an older copy of the DS
"10/17/2014 Corrected label on SOA curve Fig 8  on page 4."

Online T3sl4co1l

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Re: Lets see ... datasheet errors ... (or likely ones ... )
« Reply #2 on: June 12, 2019, 10:22:45 pm »
Sounds plausible at Tc=25C versus Ta=25C. Does it say?

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
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Offline 3roomlab

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Re: Lets see ... datasheet errors ... (or likely ones ... )
« Reply #3 on: June 14, 2019, 03:42:51 am »
Sounds plausible at Tc=25C versus Ta=25C. Does it say?

Tim

the AUIRFR8405 chart says Tc 25C
is there a fundamental thing I am missing?
spheres of influence, example linustechtips. can you feel the brainwashing? showing off equipment, etc. were you swayed and baited? with immense popularity (and social "titles"), can you afford to disagree?
 

Online T3sl4co1l

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Re: Lets see ... datasheet errors ... (or likely ones ... )
« Reply #4 on: June 14, 2019, 08:32:27 am »
You can't heatsink a DPAK so that Tc=25C under load, but they rate them that way regardless.  Or they often do.

Whereas Ta=25C it's doing, a watt or so, and definitely not as much DC current.  The difference could easily be 3 vs. 30A.  Also matters what the layout is, if it's minimum footprint or, say, metal or ceramic substrate!

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 


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