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Finding Threshhold voltage from datasheet

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allegro

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I'd like to operate the N-channel mosfet of the FDC6420 dual channel mosfet at VDC_nch =~ 0V (close to 0V), and IDS_nch = 200mA.

How can I know from its Datasheet the threshhold voltage under these conditions?

In the table, they mention Vthresh_hold_nch = 1.5V (max) when VDS_nch=VGS_nch and IDS_nch = 250uA.

Should the threshold change under different conditions?

Thanks.
 
Last edited:

BrownOut

Banned
The threshold voltage does not change. You're stuck with what you get.
 
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audioguru

Well-Known Member
Most Helpful Member
Usually the threshold voltage of a Mosfet is not used for anything because it is a range of voltages at the gate where it barely turns on and conducts only 0.25mA.

It is completely turned off when its gate voltage is zero and these Mosfets are fully turned on when the gate voltage is 2.5V and 4.5V as is spec'd in the datasheet.
 
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