Author Topic: Can the IRF1405 realy switch 169 Amps at 10v ?!  (Read 826 times)

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Offline whatsthegeekTopic starter

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Can the IRF1405 realy switch 169 Amps at 10v ?!
« on: November 03, 2017, 09:20:11 pm »
Hi, I bought a couple of IRF1405 after reading in the datasheet that they can switch up to 169 Amps. Is it real or do I not undertsand the datasheet ?
If so, can I paralelle them to get even higher power ?

Datasheet:
https://www.infineon.com/dgdl/irf1405pbf.pdf?fileId=5546d462533600a4015355db084a18bb
"Continuous Drain Current, VGS @ 10V: 169A"

Sorry, probably a n00b question  ;D

Thanks !
 

Offline stmdude

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Re: Can the IRF1405 realy switch 169 Amps at 10v ?!
« Reply #1 on: November 03, 2017, 09:36:14 pm »
So, the (6) note on the line you copied into the post says:
"Package limitation current is 75A."

You'll also need to calculate the thermals for it to see if you can dissipate the heat well enough for the junction temperature to not exceed 175C.

It's a TO-220 package. Don't expect miracles from it. Like being able to pass almost 1.7KW of power. :)
 

Offline whatsthegeekTopic starter

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Re: Can the IRF1405 realy switch 169 Amps at 10v ?!
« Reply #2 on: November 03, 2017, 09:47:34 pm »
Oh ok, thanks a lot  :)

So, how can I calculate the maximum amps I can pass though it know the voltage and the power dissipation ?

Thanks !
 

Offline danadak

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Re: Can the IRF1405 realy switch 169 Amps at 10v ?!
« Reply #3 on: November 03, 2017, 10:33:51 pm »
You can back into it from max Tj you want to limit to, using thermal R
of heatsink that will tell you for worst case ambient T how much power
you can dissipate. Then you can compute the current voltage conditions
from the max Pdiss at your max Tambient and Tjunction.

Google this - "computer heat sink requirements calculator java"


Regards, Dana.
Love Cypress PSOC, ATTiny, Bit Slice, OpAmps, Oscilloscopes, and Analog Gurus like Pease, Miller, Widlar, Dobkin, obsessed with being an engineer
 


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