Bora's SMPS design - schematic+PCB

[DigiSoft]

This is bora design for SMPS for car amplifiers. He claims that it can produce over 600W of power.

What do you think? Is it good schematic?

It also has PCBs but it is dual sided. Can someone make one side version of this?

Thanks.

EDIT1: Is it possible to use ATX/AT power supply ferrite transformer for this project?

[event horizon]

Originally Posted by DigiSoft

This is bora design for SMPS for car amplifiers. He claims that it can produce over 600W of power.

Quite possibly yes, it depends on the frequency it's running at. One thing i will say is it'll get pretty warm doing it as it's not going to be incredibly efficient, see below

Originally Posted by DigiSoft

What do you think? Is it good schematic?

Well it could be a fair bit more compact or the ground plane extended so as to lower parasitic inductance. I notice there are a total of zero snubbers on both the transformer primary & secondary. This probably explains why he used 100V mosfets & this explains why i said it'd get quite warm, if he'd have added snubbers he could have used much lower RDS on 60V mosfets, i'd also double the amount of them to improve efficiency. The lack of secondary snubbers is seriously asking for trouble with the kind of output voltage it could (in theory) put out. I'd have used 400V fast doides rather than 200V which is too close even with snubbers in reality.

E2A:- Just noticed the bunch of capacitors feeding the centre tap of the transformer primary, this is to prevent DC saturation of the core, it could be done much better with some simple electronics to balance the output of the TL494. The worst thing i have just noticed is that the primary & secondary grounds are connected together, this will cause bad ground loops with whatever you connect to an amplifier that this supply feeds.

All in all it's not good & could be significantly improved for very little cost at all.

Originally Posted by DigiSoft

It also has PCBs but it is dual sided. Can someone make one side version of this?

Not really no, to keep parasitic inductance low you need a double sided PCB so you can use a ground plane

Originally Posted by DigiSoft

EDIT1: Is it possible to use ATX/AT power supply ferrite transformer for this project?

You could use an alternative, but it'd need to be of the same kind of ferrite material & also the same core area to do similar power.

[Mamak]

what instead number for 2sc1775 and 2sa872?and can anybody give way how to instead transistor?