Lateral FET and Rds on?

AndrewT · 27th December 2005, 06:29 PM

Vertical FETs quote an "Rds on" figure in the datasheets.
This puts another SOAR boundary into the low voltage area of the curve.

Does a Lateral FET have a similar Rds on value?
I cannot find one for 2sj162/k1058
My circuit needs an Rds on value below 1.5ohms to keep the IV on the right (safe) side.

lineup · 27th December 2005, 06:55 PM

I have no idea why no Rds is given for lateral mosfets.

Can we try to make up a value?
From figure is 6 A at Vds=5 Volt

Gives R = 0.8 Ohm

jacco vermeulen · 27th December 2005, 07:05 PM

Rds(on) for Hitachi 50/56/135/176 was around 1.5 Ohms.

For lower capacitance Lateral Mosfets Rds(on) is a lot higher.
Benefit of vertical fets: much higher capacitance but really low Rds(on) values.

27th December 2005, 06:29 PM	#1
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Lateral FET and Rds on? Vertical FETs quote an "Rds on" figure in the datasheets. This puts another SOAR boundary into the low voltage area of the curve. Does a Lateral FET have a similar Rds on value? I cannot find one for 2sj162/k1058 My circuit needs an Rds on value below 1.5ohms to keep the IV on the right (safe) side. __________________ regards Andrew T.

27th December 2005, 07:05 PM	#3
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Rds(on) for Hitachi 50/56/135/176 was around 1.5 Ohms. For lower capacitance Lateral Mosfets Rds(on) is a lot higher. Benefit of vertical fets: much higher capacitance but really low Rds(on) values. __________________ Looks like Sponge Bob has killed another thread.

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