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

[Cardone]

I'm looking forward to my Vitaly amplifier -> -> -> made by russia .....

[drMordor]

More parts have arrived)))
Everything except boards and TPA3255

[Cardone]

It's great that you have received the goods

[nerone]

Hopefully the pcbs and 3255 will arrive soon.
For Christmas it would be a nice gift under the tree

[turion64]

I decided to mount it slightly differently...on its side directly over one of the casing’s floor vents. This way a natural convection flow would bring heat from the heatsink out the vent in the top of the case. A JLE speaker protection circuit is driven by its own 15V transformer while drMorder’s board’s extra 15V (+ & GND) output is sent to a simple LM7812 circuit to drive a silent 80mm 12V fan placed directly in front of the amp’s on board transformer. Sounds fantastic. You all will be very happy once you get yours.

Cheers, Pete

[tmuikku]

turion64 / drmodor, I'm curious how good is the thermal connection between the chip and a heat sink and how it is ensured? The chip height is exactly that of the standoffs? some thermal paste in between?

[drMordor]

Aluminum plate

[turion64]

Originally Posted by tmuikku

turion64 / drmodor, I'm curious how good is the thermal connection between the chip and a heat sink and how it is ensured? The chip height is exactly that of the standoffs? some thermal paste in between?

tmuikku: as Vitaliy has just stated his PCB is mounted on a thick aluminum plate and it is secured to the PCB in several places what look to be key areas (either side of the 3255 as an example) to assure proper heat transfer. When I ran the amp w/o being in the case the plate got quite warm indicating (to me at least) that it was doing its job. I mounted his amp to another aluminum plate so the sideways mounted scheme could be achieved. I could see some sort of paste where the chip meets his heatsink plate but could not tell if there was an extra connection metal plating in between the 3255 and the heatsink plate nor did I want to take everything apart to check. The extra fan I added is probably unnecessary.

I’ve run the thing for hours, continuously, w/o any issues, but I don’t listen to my music at extremely loud levels so I can’t claim to test the amps limits. The good Dr can give further clarifications.

Cheers, Pete

[tmuikku]

Ah, the PCB sized aluminium plate I see in the pictures is already attached at assembly by drMordor and included in the purchase? Great!

[turion64]

Yes, here’s a picture of his amp (as I received it) while I was bench testing it; I use that term loosely since I’m not a probe & scope kinda guy.

Pete