Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

Better power MOSFET models in LTSpice
Better power MOSFET models in LTSpice
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 7th November 2017, 06:02 PM   #191
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Better power MOSFET models in LTSpice
Quote:
Originally Posted by keantoken View Post
I've attached a demo file along with a symbol that will work with it. See if it work right for you.
Thanks Keantoken!

Hey, I just saw your Kuartlotron buffer - cool! Topology brought to mind the DLH amp/buffer I just played with. 4 actives and super low distortion. In case you haven't seen it. I will definitely try your K buffer though. I love 4 to 5 transistor circuits.

DLH Amplifier: The trilogy with PLH and JLH amps

Edit:

regarding your example schematic for the BSP129, what do I do with the txt file?

So I tried opening the .asc file and get an error missing symbol. How do I link the symbol txt file?

-Thanks.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio

Last edited by xrk971; 7th November 2017 at 06:06 PM.
  Reply With Quote
Old 7th November 2017, 06:50 PM   #192
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Remove the .txt from the symbol file since the forum wouldn't let me upload a .asy file. If you keep it in the same directory with the .asc file I think LTSpice should find it and use it.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 7th November 2017, 07:09 PM   #193
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Better power MOSFET models in LTSpice
Keantoken, it works like a charm!

Super Thank you!

Cheers,
X
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 8th November 2017, 03:44 AM   #194
IanHegglun is offline IanHegglun  Australia
diyAudio Member
 
Join Date: Mar 2017
Default LTspice Infineon subcircuit BSP129 plots

Thanks Keantoken, excellent work as usual

I'd like to know what type of MOSFET model Infineon use. Anyone recognise it?

Attached are some Vgs and Vds plots to check out the model. They plot two curves each. Stepped Tj non-electrothermal. OR you can plot a Fixed Tj plus an electrothermal. You choose which ones by changing the .Step commands: turn one off and the other on then re-Run. Some findings:
  • The Vds plot you can see subthreshold conduction is modelled and the threshold temp co is modelled.
  • The Vds-2V plots show entering saturation where there are abrupt changes in the slope just like LTspice vdmos. There is no drain conductance in saturation -- not sure if it is set to zero, or if it is not modelled. It's not obvious from the listings on how to set the drain conductance like Lambda does in the VDMOS. Anyone know how?
  • The Vds-50V sweep shows the drain conductance in saturation increases as Tj rises -- this is something that standard (isothermal) models do not give and at lower audio frequencies could easily change simulated distotion in many designs.
These seem to be excellent models. Obviously a lot of work has gone into developing them and making them available for a fairly wide range of simulators. The Introduction PDF Table 2.1 says the PSpice code ".lib" does SiMetrix, LT-Spice, and Multisim. Early documents are dated 2006.

Last edited by IanHegglun; 8th November 2017 at 03:54 AM. Reason: change link
  Reply With Quote
Old 8th November 2017, 04:23 PM   #195
Bob Cordell is offline Bob Cordell  United States
diyAudio Member
 
Join Date: Sep 2006
Quote:
Originally Posted by IanHegglun View Post
Thanks Keantoken, excellent work as usual

I'd like to know what type of MOSFET model Infineon use. Anyone recognise it?

Attached are some Vgs and Vds plots to check out the model. They plot two curves each. Stepped Tj non-electrothermal. OR you can plot a Fixed Tj plus an electrothermal. You choose which ones by changing the .Step commands: turn one off and the other on then re-Run. Some findings:
  • The Vds plot you can see subthreshold conduction is modelled and the threshold temp co is modelled.
  • The Vds-2V plots show entering saturation where there are abrupt changes in the slope just like LTspice vdmos. There is no drain conductance in saturation -- not sure if it is set to zero, or if it is not modelled. It's not obvious from the listings on how to set the drain conductance like Lambda does in the VDMOS. Anyone know how?
  • The Vds-50V sweep shows the drain conductance in saturation increases as Tj rises -- this is something that standard (isothermal) models do not give and at lower audio frequencies could easily change simulated distotion in many designs.
These seem to be excellent models. Obviously a lot of work has gone into developing them and making them available for a fairly wide range of simulators. The Introduction PDF Table 2.1 says the PSpice code ".lib" does SiMetrix, LT-Spice, and Multisim. Early documents are dated 2006.
The transition into the subthreshold region of conduction looks a little too sharp. Comments?

Cheers,
Bob
  Reply With Quote
Old 8th November 2017, 04:26 PM   #196
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
That is reverse diode conduction, not subthreshold. It's actually a Id/Vd chart.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 8th November 2017, 05:53 PM   #197
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Better power MOSFET models in LTSpice
Hi Keantoken, just wanted to say Thank you again. Here is where the BSP129 model ended up at:

AKSA's Lender Preamp with 40Vpp Output

You should like it, a 4 BJT (not including the BSP129 as a CCS) preamp with gain and 40vpp muscle.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 7th January 2018, 11:27 AM   #198
astx is offline astx  Austria
diyAudio Member
 
Join Date: Jan 2011
Location: Tyrol / Austria
Better power MOSFET models in LTSpice
Default IXYS IXTH80N20L and IXTH48P20P models by David Zan

Attached 2 models for the IXYS linear MOSFETs IXTH80N20L and IXTH48P20P created by David Zan.

Permission for distribution here: Fully Differential Amplifier With CMCL

The simulation of a class AB amplifier using these models was very successful verified in a real amplifier here 2stageEF high performance class AB power amp / 200W8R / 400W4R.

Code:
* David Zan, (c) 2017/03/02 Preliminary
.MODEL IXTH80N20L VDMOS Nchan Vds=200
+ VTO=4 KP=15
+ Lambda=2m  
+ Mtriode=0.4   
+ Ksubthres=150m
+ Rs=5m Rd=10m Rds=200e6
+ Cgdmax=9000p Cgdmin=300p A=0.25
+ Cgs=5500p Cjo=11000p
+ Is=10e-6 Rb=8m   
+ BV=200 IBV=250e-6
+ NBV=4
+ TT=250e-9

* David Zan, (c) 2017/03/02 Preliminary
.MODEL IXTH48P20P VDMOS Pchan Vds=200
+ VTO=-4 KP=10
+ Lambda=5m  
+ Mtriode=0.3   
+ Ksubthres=120m
+ Rs=10m Rd=20m Rds=200e6
+ Cgdmax=6000p Cgdmin=100p A=0.25
+ Cgs=5000p Cjo=9000p
+ Is=2e-6 Rb=20m   
+ BV=200 IBV=250e-6
+ NBV=4
+ TT=260e-9
Attached Files
File Type: txt ixys_ixth80n20l_ixth48p20p.lib.txt (1.0 KB, 35 views)
__________________
Hint: have a look at first post of my threads for an updated index!

Last edited by astx; 7th January 2018 at 11:38 AM.
  Reply With Quote
Old 7th January 2018, 12:21 PM   #199
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Cool.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 23rd May 2018, 11:56 AM   #200
haiqu is offline haiqu  Australia
diyAudio Member
 
haiqu's Avatar
 
Join Date: Oct 2005
Location: Brisbane
Default VMOS

What's the closest model to the old Siliconix VMP series VMOS parts? I've acquired a quantity of them and want to start working with them, especially the Russian equivalents like the KP901A.

Examples also include the (renamed) 2N6656-2N6661 parts.
__________________
[VK9VK] With great power comes great current squared times resistance.
I spent most of my money on fast cars, hot girls, hi-fi gear and booze. The rest I just wasted.
  Reply With Quote

Reply


Better power MOSFET models in LTSpiceHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LTSpice tube models Osvaldo de Banfield Software Tools 27 26th October 2013 06:04 AM
LTSpice models needed popilin Tubes / Valves 6 25th April 2013 12:08 AM
Adding models in LTSpice danny92 Software Tools 1 13th April 2013 10:05 PM
Ltspice and Valve models Melon Head Software Tools 3 18th October 2009 08:35 AM
2SJ and 2SK Power Mosfet Spice Models Requested alaskanaudio Everything Else 4 14th December 2001 01:14 AM


New To Site? Need Help?

All times are GMT. The time now is 01:58 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki