25 Watt Kinda Blameless with TMC, fast amplifier

Code:
.MODEL ksc3503 NPN
Thanks.
I simulated the circuit using your model of ksc3503, which you posted in #38.
Success!
Now it even works with overdrive/clipping. no latchup
Seems that the model of ksc3503 that one can find on LTwiki is not quite right.

I'll call your model ksc3503_2 to distinguish it from the 'wrong' one.
 

Attachments

  • kinda-blameless_2.asc
    7.8 KB · Views: 31
  • Like
Reactions: 1 users
Thanks.
I simulated the circuit using your model of ksc3503, which you posted in #38.
Success!
Now it even works with overdrive/clipping. no latchup
Seems that the model of ksc3503 that one can find on LTwiki is not quite right.

I'll call your model ksc3503_2 to distinguish it from the 'wrong' one.
That is alright.
I see you have added some compensation.
Between the LTP pair.
Also adjusted the TMC comp.
But if it works it is alright.
 
  • Like
Reactions: 1 user
I post the @catd circuit. Because I think it is best so far.
It is from the .asc file in post #41.

Kinda Blameless TMC_catd.jpg
 
Hi...
In case I wanted to build this thing, I searched the net for the Exicons (10N20/10P20).
They are not easy to get and then not cheap either.

That's why I tried other Mosfets, which on the one hand are included in the LTSpice database
and on the other hand can also be purchased cheaply from my preferred supplier.

The result was IRFP240/9240.
At least in the simulation below it works with them.
kinda-blameles_irfp.jpg
 

Attachments

  • kinda-blameless_IRFP.asc
    9.1 KB · Views: 23
  • Like
Reactions: 1 user
@catd
https://gb.profusion.uk/uk/ecx10n20
https://gb.profusion.uk/uk/ecx10p20
I dont think that is expensive.

For using IRFP240/9240 I believe we need a VBEMultiplier in VAS.
Laterals like ECX10N20 are easy to drive, but IRFP240 is not so easy.
And there is the temperature that a VBEMultiplier takes care of. HEXFET can runaway when heated.

But if you try IRFP240 it might be good. I really dont know.
Best is of course the lateral ECX10N20.
 
Last edited: