Akita "AllInOne" Amp based on TPA325x PFFB+ and LLC PSU in one board.

[drMordor]

Mounting holes not grounded))

 

[turion64]

Pete, I do it)))

 

[drMordor]

Good morning!

 

[pinnocchio]

Are you selling the amplifier with V3 PCB?

 

[drMordor]

Yes, this is group buy.
we gather at least 10 people, collect money, I order boards and components, do the assembly and send

 

[drMordor]

I ask everyone who wants the amplifier to put a plus

 

[Cardone]

Hello dr Mordor ...
I would like to get an amplifier from you that my speakers start to fly when I listen to music and eat spaghetti .....

 

[drMordor]

Wow! You need 100000000 watt amp? For flying speakers)))

 

[xrk971]

Neat looking design DrMordor. Do you have schematics posted somewhere? I am curious how the noise background of the SMPS looks on an FFT - do you have any measurements of the amp under load? 10w and 50w into 4ohms or 8ohms would be good baseline test cases. Also, what is the gain with PFFB and the OPA1656? Is is still intrinsic 22dB (no PFFB) and ~15dB (with PFFB installed)?

 

[drMordor]

xrk971 thanks.
PFFB+1565 ~15,9+9,5
I didn't do normal measurements, I will do it next week

 

[drMordor]

I will show the diagram after assembly.
Nothing magic, I added 4 resistors and 4 capacitors to the PFFB.

 

[multisync]

+ Ill take one

TPA3255

120VAC input for the PSU for Canada

48-50VDC power supply

Let me know when and how to send $, etransfer or Paypal

Regards
Спасибо

 

[drMordor]

+
Accepted.
Do not rush to pay, it is still early. I will write to you.

 

[TNT]

TPA3255EVM has them all parallel and in close proximity to each other. I've read through a few of TI's documents and have not seen any comments about this... a lot of other designs have this as well.

Yes, I see this also. Bit I have a hunch that this may be from convenience... any alternativ is really... cumbersome.... so maybe they don't want to take that step to optimise!?

I doubt that such inductor will not show a magnetic field when passing 5A.... and that a neighbour would not pick it up? But maybe the PFFB kills it?

//

 

[drMordor]

I use closed inductor, magnetic field in airgap only.
TPA3255EVM used toroidal inductors, with open magnetic field

 

[TNT]

OK!!

//

 

[pinnocchio]

Is the amplifier output inductor optimized for 4ohms, 8ohms or it supports both?

Do

 

[drMordor]

Both, 8 ohm better

 

[drMordor]

Guys, I wish everyone had their amps before Christmas))
On Monday, I send PCB files to production. There is time for amending
I will make 10 amps.

 

[leszczu]

+ Remember about me It would be cool to get it before Christmas.