my 80W flyback smps

[rikvancoolwijk]

Hi, It's been a while since I posted anything, but I’d like to show my new smps

DSCN9388.jpg DSCN9390.jpg

It is 80V to 250V AC and it's now stable from 12 to 16,5 V DC out. It can be at 20V DC but it needs a bit more work to get stable.

I'm using the smps for my little class-d amp project.

the ps is 80 RMS and doesn’t need any heat sinks.

Gr Rik

[Th3 uN1Qu3]

Nice work but i don't see the switching transistors or controller. Are they on the back of the board? A schematic would be nice.

[rikvancoolwijk]

They'r on the back, it's based on the UCC28610. here is the standard application:my tiny class d amp tpa3110

I don’t have a schematic drawn for this one.

[Th3 uN1Qu3]

Looks quite clean. Congrats. This controller looks quite interesting and it appears it is stocked locally so i might give it a shot sometime.

[rikvancoolwijk]

I have very good results so give it a go!
for size, the pcb is 50x80mm

and there is an extra decoupled 3,3v ps on the board for the digital stuff

[rikvancoolwijk]

I'm trying to build everything from scradge so I can influence everything for my specific application! Would there be interest in the DIY community for smps modules like this?

Gr Rik

[Th3 uN1Qu3]

I see some interest especially with those new high efficiency controllers not plain old TL494 and UC3842 all the time. I for one prefer to build them myself because the selection of Meanwell supplies that are available locally are overpriced, and from most places shipping to Romania is either expensive or takes a month. If cheap/free shipping were faster i would definitely buy the power supplies. They aren't as entertaining to design as an amplifier.

[rikvancoolwijk]

I think a good smps is at least as challenging to build as a good amp .

what price do they ask for meanwell smps in Romania? here and in most places they are pretty cheap.

[Th3 uN1Qu3]

Just a random example: 24v/13A with active PFC = $96. But this is coming from a large and known overpriced electronics store.

They can probably be found for 2/3 the price elsewhere but that's still a bit high in my book... and the selection isn't that varied to begin with, plus some use United Chemi-Con, but others use capacitors from real obscure makers.

[luka]

that is cool and little supply, nice job!!