LM3875 spice - first try

[ash_dac]

Hi,

It's pretty ropey model based on the LM386; transistors may be connected incorrectly, transistors are missing, uses LM386 model for pnp and npn transistors., bias currents are inorrect..

It seems to oscillate very easily!

LT Spice:-

.asy file in C:\Program Files\LTC\SwCADIII\lib\sym\Opamps folder
.sub file in C:\Program Files\LTC\SwCADIII\lib\sub
.asc file in C:\Program Files\LTC\SwCADIII

Did anyone get any further making a LM3875 model ?

 

[lineup]

hello

I was almost SURE National should have spice model
for LM3875 for download.
But looks like NOT.
http://www2.national.com/appinfo/amps/amplifiers_spice_models.html

Anyway
there has got be several persons that has done such a model
or for some similar IC by themselves.
I read somewhere a person used model of OPA541, Burr-Brown for LM3875 simulations.

Here is someone that did a spice model of LM3886, in January 2004
LM3886 Spice Model done
And he tried to use this information,when doing his model:
http://www.ecircuitcenter.com/OpModels/Opmodel2/opmodel2.htm


Regards
lineup