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Old 9th March 2013, 07:30 PM   #11
Zen Mod is offline Zen Mod  Serbia
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under 1% is good enough in my book

look for Pa's "matching mosfets " ( or sometyhing like that ) article
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Old 9th March 2013, 07:39 PM   #12
NicMac is offline NicMac  Italy
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Quote:
Originally Posted by Tyimo View Post
Thanks!
What is an acceptable matching tolerance for power mosfets (like IRFP140)?
I found in Vgs 3.28 and 3.31 pairs.
That is about 1% difference and should be just fine as you will probably have equally important resistors with similar tolerance in your circuit.
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Old 9th March 2013, 07:44 PM   #13
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The matching is not in %, rather in Volts. In general I match to within
0.1V on Vgs, although the quantities we use in production allow .01V
on a regular basis.

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Old 10th March 2013, 06:28 AM   #14
Tyimo is offline Tyimo  Hungary
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Thank you all!
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