MOSFET Rds(ON) comparison

japlytic · 10-31-2010, 06:05 AM

If you notice it, many MOSFET datasheets list the ON resistance Rds(ON) when the Gate to Source voltage is 10V.
I think this is an industry standard.

Some MOSFET datasheets (such as the CEP603) also list the Rds(ON) for lower and/or higher Gate to Source voltages.

Wizard · 11-01-2010, 08:18 AM

Also there are some that is for logic level MOSFETs that can be driven directly from logic voltage.

The other issue is capacitance level on the gate. This make need for stronger gate driver to swing fast enough on gate voltages if the capacitance is high enough. Other wise the MOSFET overheats if the swing time is too slow.

Cheers, Wizard

10-31-2010, 06:05 AM	#1
japlytic Badcaps Veteran Join Date: Oct 2005 City & State: Rockhampton, Queensland, Australia My Country: Australia Line Voltage: 240VAC 50Hz I'm a: Hobbyist Posts: 1,299	MOSFET Rds(ON) comparison If you notice it, many MOSFET datasheets list the ON resistance Rds(ON) when the Gate to Source voltage is 10V. I think this is an industry standard. Some MOSFET datasheets (such as the CEP603) also list the Rds(ON) for lower and/or higher Gate to Source voltages. __________________ My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

11-01-2010, 08:18 AM	#2
Wizard Badcaps Veteran Join Date: Mar 2008 Posts: 2,297	Re: MOSFET Rds(ON) comparison Also there are some that is for logic level MOSFETs that can be driven directly from logic voltage. The other issue is capacitance level on the gate. This make need for stronger gate driver to swing fast enough on gate voltages if the capacitance is high enough. Other wise the MOSFET overheats if the swing time is too slow. Cheers, Wizard

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