Hi all,

I manage that the Multisim in our college doesnt have the LM386 component.
As i know we can create a component by our own in Multisim.

Can anyone here teach me how to convert the datasheet to Multisim?
I have the PSpice file for my OrCad but not for Multisim. Plz advise

 

Here is a link to a tutorial to create a new component.

http://zone.ni.com/devzone/cda/tut/p/id/3173

You can also take an existing component that is very similar and just make adjustments to it, and even use an existing SPICE model in place of the original one. Make sure to allocate your pins properly.

Good luck

 

There is also a forum just for Multisim users. They work as a community to generate parts on occasion.

http://forums.ni.com/ni/board?board.id=370

 

Ron H Posted the LM 386 Spice Model in This Thread

Use it with the component wizard in Multisim to build a 386.

I'll post it again here:

q1 gnd inn 10011 ddpnp 
r1 inn gnd 50k 
q2 gnd inp 10012 ddpnp 
r2 inp gnd 50k 


* differential input stage, gain-setting 
* resistors, and internal feedback resistor: 


q3 10013 10011 10008 ddpnp 
q4 10014 10012 g1 ddpnp 
r3 vs byp 15k 
r4 byp 10008 15k 
r5 10008 g8 150 
r6 g8 g1 1.35k 
r7 g1 out 15k 


* input stage current mirror: 


q5 10013 10013 gnd ddnpn 
q6 10014 10013 gnd ddnpn 


* voltage gain stage & rolloff cap: 


q7 10017 10014 gnd ddnpn 
c1 10014 10017 15pf 


* current mirror source for gain stage: 


i1 10002 vs dc 5m 
q8 10004 10002 vs ddpnp 
q9 10002 10002 vs ddpnp 


* Sziklai-connected push-pull output stage: 


q10 10018 10017 out ddpnp 
q11 10004 10004 10009 ddnpn 100 
q12 10009 10009 10017 ddnpn 100 
q13 vs 10004 out ddnpn 100 
q14 out 10018 gnd ddnpn 100 


* generic transistor models generated 
* with MicroSim's PARTs utility, using 
* default parameters except Bf: 


.model ddnpn NPN(Is=10f Xti=3 Eg=1.11 Vaf=100 
+ Bf=400 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 
+ Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 
+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n 
+ Tf=1n Itf=1 Xtf=0 Vtf=10) 


.model ddpnp PNP(Is=10f Xti=3 Eg=1.11 Vaf=100 
+ Bf=200 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 
+ Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 
+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n 
+ Tf=1n Itf=1 Xtf=0 Vtf=10) 


.ends

*----------end of subcircuit model-----------

 

Can anyone tell me what should i put fir the pin 1 and pin 8 type?
is bidirectional, passive, NC or power?

and pin 2 is my -ve feedback input and izit only put input for the type?
also for pin 3 +ve feedback input?
and also the pin7 the bypass?

Can tell me what to put for pin parameter above pin?

Thank You

 

Ron H Posted the LM 386 Spice Model in This Thread

Use it with the component wizard in Multisim to build a 386.

I'll post it again here:

q1 gnd inn 10011 ddpnp 
r1 inn gnd 50k 
q2 gnd inp 10012 ddpnp 
r2 inp gnd 50k 


* differential input stage, gain-setting 
* resistors, and internal feedback resistor: 


q3 10013 10011 10008 ddpnp 
q4 10014 10012 g1 ddpnp 
r3 vs byp 15k 
r4 byp 10008 15k 
r5 10008 g8 150 
r6 g8 g1 1.35k 
r7 g1 out 15k 


* input stage current mirror: 


q5 10013 10013 gnd ddnpn 
q6 10014 10013 gnd ddnpn 


* voltage gain stage & rolloff cap: 


q7 10017 10014 gnd ddnpn 
c1 10014 10017 15pf 


* current mirror source for gain stage: 


i1 10002 vs dc 5m 
q8 10004 10002 vs ddpnp 
q9 10002 10002 vs ddpnp 


* Sziklai-connected push-pull output stage: 


q10 10018 10017 out ddpnp 
q11 10004 10004 10009 ddnpn 100 
q12 10009 10009 10017 ddnpn 100 
q13 vs 10004 out ddnpn 100 
q14 out 10018 gnd ddnpn 100 


* generic transistor models generated 
* with MicroSim's PARTs utility, using 
* default parameters except Bf: 


.model ddnpn NPN(Is=10f Xti=3 Eg=1.11 Vaf=100 
+ Bf=400 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 
+ Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 
+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n 
+ Tf=1n Itf=1 Xtf=0 Vtf=10) 


.model ddpnp PNP(Is=10f Xti=3 Eg=1.11 Vaf=100 
+ Bf=200 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 
+ Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 
+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n 
+ Tf=1n Itf=1 Xtf=0 Vtf=10) 


.ends

*----------end of subcircuit model-----------

izit copy your this PSpice file and save it to a .txt file?
or i need to save in a different name file? such as orcad using .lib...
Mutisim used what file?

 

I pasted that in the model part using the "Model Wizard" in multisim, then chose "copy" for a footprint, and assigned the pins.

When you start the "Model Wizard", it walks you through it, the hard part is the actual electrical model above. I choose "copy from" for another amplifer (i believe Iused an op-amp), once the model is added, the pins are assigned correctly, they only need to be matched to the footprint for ultiboard.

 

I pasted that in the model part using the "Model Wizard" in multisim, then chose "copy" for a footprint, and assigned the pins.

When you start the "Model Wizard", it walks you through it, the hard part is the actual electrical model above. I choose "copy from" for another amplifer (i believe Iused an op-amp), once the model is added, the pins are assigned correctly, they only need to be matched to the footprint for ultiboard.

But i face a problem when im in the step 4. refer the attachment here and have a look.
When i proceed to step 6 i paste the code that u paste it here and click next, it does come out an error. refer the 2nd attachment.