Finding SPICE Models

I'm building up a SPICE model of an amp I'm working on, and I'm finding that models of the transistors are incredibly hard to find. The amp is a High Voltage amp, used to direct-drive a set of home made electrostatic headphones. The design is the one Kevin Gilmore produced to drive Omega commercial electrostatics, http://headwize.com/projects/showproj.php?file=gilmore2_prj.htm

My hope is, after i build this, I can scale it up for use as a solid-state direct-drive amp for a full size set of ESLs. In any case, I'm having real difficulty finding the following transistor models:

2SC1815
2SA970
2SA1156
2SC2240
2SC3675
2SC2705

This is, in fact EVERY transistor type in the circuit but one; obviously I'm having trouble finding what i need. The only one I've found is the 2SK389, and even then I'm not so sure that model is entirely accurate. If anyone could help me out with any of these models, or better yet show me a few good resources for finding SPICE models, I would be forever grateful. Thanks.
 
Lots of thanks to Ole Hoffmeyer Lund for his gracious provision of the SPICE models I was looking for. Sadly, though, it seems OrCad library files (.PLB and .SLB) are not in standard SPICE subcircuit format. Circuitmaker 2k didn't seem to like that at all. So if anyone out there knows the best way to read OrCad libraries as regular ASCII text SPICE models, please pass along the knowledge. Otherwise, if anyone can dig up the above listed transistors in a different format, that'd be a decent second choice.

Also, in either case, I'm still looking for the 2SC3675 model. This is evidently a special-purpose high voltage transistor, often times used in computer monitor's to control high voltage tube bias. I'm taking Kevin Gilmore at his good word that this transistor performs acceptably as an audio high voltage device. Once I can sim my amp and the few tweaks I've made, I'll build it and see. Thanks everyone for the time and attention, good luck on your respective projects.
- Jonathan
 
Just for general info, I did find a .lib form of the spice models, so I now have all of the transistor models I was looking for, except Sanyo's 2SC3675.

If anyone wants the regular subcircuit-style model libraries, i can direct you to them. And of course, if anyone can turn up a reasonable model of the 2SC3675, that'd be great.

Also, if anyone knows a good way to write a spice model from a data sheet, I DO have the 2SC3675's data sheet. But I dont know how to generate a matching model. Any help there would be great also. Thanks everyone.
- Jonathan
 
Ex-Moderator
Joined 2003
The normal 2SC1815 has a Hfe between 70 and 140. The Y between 120-240, the GR between 200-400 and the BL between 350-700.

.MODEL 2SC1815G NPN (IS=81.2039P BF=130.444 NF=1.22428 VAF=251.702 IKF=1.05399
+ ISE=1.76673P NE=1.65186 BR=7.21621 IKR=16.9232M ISC=3.03555N NC=1.78127
+ RE=1.06272 RC=279.03M CJE=2P MJE=500M CJC=7.81791P VJC=700M MJC=499.93M
+ TF=1.94501N XTF=500.013M VTF=10 ITF=10.0727M TR=10N )

.MODEL 2SC1815 NPN (IS=9.99315F BF=192.019 NF=1.01109 VAF=311.281 IKF=214.789M
+ ISE=124.464F NE=1.51791 BR=4.99998 IKR=980.183 ISC=33.4247F RE=2.96389 CJE=2P
+ MJE=500M CJC=7.82341P VJC=700M MJC=500.188M TF=512.206P XTF=183.171M
+ VTF=9.97698 ITF=9.76409M TR=10N )

.MODEL 2SA1015 PNP (IS=10.0004F BF=239.283 NF=996.198M VAF=100 IKF=172.882M
+ ISE=43.1361F NE=1.44709 BR=5 IKR=961.305 ISC=121.849F RE=1.05432 CJE=2P
+ MJE=500M CJC=15.6333P VJC=700.001M MJC=499.871M TF=601.795P XTF=163.532M
+ VTF=9.93432 ITF=9.63234M TR=10N )

/Hugo :)
 
Ex-Moderator
Joined 2003
Re: Models needed

jarek said:
Hi,
Could someone help me find PSpice models for 2sc4793, 2sa1837 and 2sc5200,2sa1943?
.MODEL 2SC4793 NPN (IS=0.1p BF=130 NF=1 ISE=0.1p RB=1 RE=0.1 RC=0.2 VAF=500 IKF=3 TF=1.6ns CJC=100p )

.MODEL 2SA1837 PNP (IS=0.1p BF=130 NF=1 ISE=0.1p RB=1 RE=0.1 RC=0.2 VAF=500 IKF=3 TF=2.28n CJC=150p )

.MODEL Q2SC5200 NPN(
+ IS=10.000E-15 BF=105 VAF=100 IKF=10.000E-3 XTB=1.5
+ BR=.1001 VAR=100 IKR=10.000E-3 ISC=10.000E-15 CJE=2.0000E-12
+ CJC=485.82E-12 MJC=.33333 TF=607.76E-12 XTF=10 VTF=10 ITF=1)

Thats all I have ;)

/Hugo
 
Re: Re: Models needed

Netlist said:

.MODEL 2SC4793 NPN (IS=0.1p BF=130 NF=1 ISE=0.1p RB=1 RE=0.1 RC=0.2 VAF=500 IKF=3 TF=1.6ns CJC=100p )

.MODEL 2SA1837 PNP (IS=0.1p BF=130 NF=1 ISE=0.1p RB=1 RE=0.1 RC=0.2 VAF=500 IKF=3 TF=2.28n CJC=150p )

Are those some kind of official models? Where did you get them?
I have previously posted my own DIY models for these which I
made since I couldn't find any models anywhere, but those
ones come with no guarantees at all and are used at your
own risk (needless to say, I hope :) ).
 
Ex-Moderator
Joined 2003
Re: Re: Re: Models needed

Christer said:

used at your
own risk (needless to say, I hope :) ).
Like everything I post here. :D

No, seriously, even manufacturers tell you to use there models at your own risk.
http://www.hi-fi.ru/forum/16/18234/m275478
Like always, I know it's not obvious to post models. We all know/should know that they have to be compared with datasheets.
I bet yours will be completely different and probably more accurate. I'll do a search... :)

/Hugo
 
Re: Re: Re: Re: Models needed

Netlist said:

Like everything I post here. :D

No, seriously, even manufacturers tell you to use there models at your own risk.
http://www.hi-fi.ru/forum/16/18234/m275478
Like always, I know it's not obvious to post models. We all know/should know that they have to be compared with datasheets.
I bet yours will be completely different and probably more accurate. I'll do a search... :)

/Hugo

The "use at own risk" was intended to refer to my models,
not the ones you posted. I'll have a look and compare
the models some day.

I don't expect my models to be better or even as good, but
since I couldn't find any models, I had to make my own.