Nothing been said about gate driver output impedance or speed. This definitely matters when selecting gate resistors. It's usually assumed that you need individual gate resistors to suppress RF oscillations.
If you can't select MOSFET with closely matched Vth, source resistors are the only practical way to achieve current matching.
So you say it's a purely static Vgs control without speed requirements. Means you should place gate resistors for parasitic oscillation suppression, e.g. 100 ohm each. And add current matching source resistors or select the MOSFET for closely matched threshold voltage.It is manually controlled by me.
the purpose of my circuit is to test the power supply with it's maximum current, so I change the Vgs to allow the maximum current of the power supply give me through the drain and source, for instance, I need to check a 30 Ampere of the UUT so I start to rise the Vgs slowly to get the 30 Ampere through Drain and Source.So you say it's a purely static Vgs control without speed requirements
why 100 ohm? is 10K ohm is good enough?e.g. 100 ohm each
You don't tell much circuit details, so why should I suggest details without knowing a specfication?why 100 ohm? is 10K ohm is good enough?
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