Measurement of Ron of MOSFET

pk_ · Mar 6, 2018

Hi All,

I am setting VGS=VDD, VDS=0.2*VDD ( as Ron is the on resistance of MOSFET when device is in triode/linear region) and measuring "Ron" as Ron=VDS/Ids.
Is this approach fine enough to get the Ron value?

Thanks

KlausST · Mar 6, 2018

Hi,

https://lmgtfy.com/?q=mosfet+rds_on+measurement+method

All information available. The first hit is a detailed descriprion.

But nobody knows and nobody can tell you what "VDD" is.
Nobody knows whay you choose "VDS=0.2*VDD". It doesn´t make sense to me.

Klaus

timof · Mar 6, 2018

Yes, you apply max (nominal) voltage to the gate, Vgs, and small (usually 100 mV or 50 mV) voltage to the drain, Vds.
Rdson = Vds/Ids.

If you are doing it in simulation, you should not worry about self-heating.
If you are doing measurements, beware of self-heating that might affect Rdson device or even burn the device (use pulsed measurements).

Measurement of Ron of MOSFET

pk_

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KlausST

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timof

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pk_

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Measurement of Ron of MOSFET

pk_

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