Notice - LME49811

[uuud]

I am just putting here this article:
Gain-X2 - LME49811 15-150Watt Gainclone amplifier

... it is kind of follow-up on this:
Gain-X - LM1875 2*20Watt Gainclone amplifier

I am right to think that this is extremely useful?

[Nisbeth]

Well, it isn't bad as such but the PSU design for the LM1875-amp is completely off! Is it your site?

/U.

[AndrewT]

Gainclone is a specific topology around an integrated Power IC, or chipamp.
Your X2 has no resemblance to a chipamp.

[palstanturhin]

Originally Posted by Nisbeth

Well, it isn't bad as such but the PSU design for the LM1875-amp is completely off! Is it your site?

/U.

That is actually my site...

Chip Amp Photo Gallery

And what do you mean by competely off?
Of course the regulating is not necessarily necessary... ;-)
But in that particular case the 24v transformer would have killed the opamps in no time...
That psu is also a compromise between power and size... And how much power does a 15W gainclone actually require from the psu??? Not 100W for sure - if it is regulated.

Step 1: Understand the voltage limits of the opamp.
Step 2: Make a PSU that does not brake those limits.

[AndrewT]

There are no opamps listed in either X or X2 amps.

[palstanturhin]

Could someone please define an operational amplifier for me.
Must it be implemented with valves to make one?
As I understand, ideal opamp has:

• Infinite input impedance
• Zero output impedance
• Infinite gain
• Zero propagation delay

Now let us make a list here...

If none fulfills the criteria, let's just call them all differential amplifiers then...

Also all suggestions wellcome about my site.
It is still under developement but I can see google has already googled it...
I was going to 'release' it a bit later, but since it is now here, we might as well do it - now.