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Better power MOSFET models in LTSpice
Better power MOSFET models in LTSpice
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Old 16th May 2019, 11:20 AM   #251
mlloyd1 is offline mlloyd1  United States
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Better power MOSFET models in LTSpice
agreed!

what's even more impressive to me is it seems the LT SPICE engine is becoming more capable and sophisticated than the expen$ive fancy versions from (for example) Spectrum Software (Micro-Cap) and OrCAD (PSPICE)!

mlloyd1

Quote:
Originally Posted by Dave Zan View Post
Excellent, that made the trip even more worthwhile
Pretty impressive to receive the update to LTSpice so fast, not stuck on the to-do list for months.
And in the middle of a world tour.

Best wishes
David
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Old 16th May 2019, 07:30 PM   #252
astx is offline astx  Austria
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Better power MOSFET models in LTSpice
Looks like the open source ngspice developers have updated their VDMOS code too to be compatible with ltspice. This is an excerpt from current vdmos-thermal branch:

src/spicelib/devices/vdmos/vdmos.c
...
/* temperature dependency */
IOP( "tcvth", VDMOS_MOD_TCVTH, IF_REAL, "Linear Vth0 temperature coefficient"),
IOPR("vtotc", VDMOS_MOD_TCVTH, IF_REAL, "Linear Vth0 temperature coefficient"),
IOP( "mu", VDMOS_MOD_MU, IF_REAL, "Exponent of gain temperature dependency"),
IOPR("bex", VDMOS_MOD_MU, IF_REAL, "Exponent of gain temperature dependency"),
IOP( "texp0", VDMOS_MOD_TEXP0, IF_REAL, "Drain resistance rd0 temperature exponent"),
IOP( "texp1", VDMOS_MOD_TEXP1, IF_REAL, "Drain resistance rd1 temperature exponent"),
...




This is an excerpt from the commit log:
commit 7d948230d0a99c7ca08e7dc3a0ce3a4d538201d6 (HEAD -> vdmos-thermal, origin/vdmos-thermal)
Author: dwarning <dwarning>
Date: Sat May 11 18:11:56 2019 +0200
correct the gain temperature exponent to the usual MOSFET negative value
commit 69465c96b54cbfb9bf743d27d5fe9d6e41e6cf72
Author: dwarning <dwarning>
Date: Sat May 11 17:53:51 2019 +0200
clarify common usage of temperature parameters and introduce aliases for tcvth and mu
That's fast too - isn't it?

BR, Toni
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Last edited by astx; 16th May 2019 at 07:34 PM.
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Old 21st May 2019, 08:02 AM   #253
bimo is offline bimo  Indonesia
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Anyone have made 2SK1530/2SJ210 model with subthreshold?
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