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Matching DMOS Fets.
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Old 19th November 2019, 03:15 PM   #1
A1008 is offline A1008
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Default Matching DMOS Fets.

Is there any difference in matching JFETS vs DMOS Fets? Need to mach some ZVP4424A and ZVN4424A. Found this device and can it be used to match these?

JFET Matcher Kit - Stompville Shop
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Old 19th November 2019, 03:45 PM   #2
Mark Johnson is offline Mark Johnson  United States
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Matching DMOS Fets.
The title of the ZVP4424A datasheet says "ENHANCEMENT MODE". That means its Idss is zero. However JFETs are depletion mode devices; their Idss is not zero. So a JFET tester will not give correct readings on enhancement mode MOSFETs.

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Old 19th November 2019, 11:07 PM   #3
A1008 is offline A1008
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Quote:
Originally Posted by Mark Johnson View Post
The title of the ZVP4424A datasheet says "ENHANCEMENT MODE". That means its Idss is zero. However JFETs are depletion mode devices; their Idss is not zero. So a JFET tester will not give correct readings on enhancement mode MOSFETs.

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Ok, thanks.
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