can someone draw a PCB for a SMPS for me?

[lorik199]

Hi
I found on the internet the following SMPS schematic

Because i'm a beginner , i don't know so well to draw PCB's
Can someone draw the PCB for me?
in .brd , .pcb , or .pdf format or others formats

i want to use the SDT13007 tranzistors
http://www.alldatasheet.com/datashee...STD13007F.html

P.S :sorry for my english, i'm romanian

[infinia]

If you have not built a prototype yet, I'd suggest it.
You could build the first one by using perfboard. Work out the bugs because that doesn't look like a product yet.

[star882]

Looks a lot like the circuits in modern fluorescent lamps. I would not recommend that circuit for operating electronics as it is not regulated. There are even better simple designs out there.

[lorik199]

in the article says that can be used on amplifiers

I'll make first a prototype and post there the results, and if will work fine, will mount on my amplifier because the transformers are too heavy

@star882 can post there a better schematic?

[star882]

Originally posted by lorik199
in the article says that can be used on amplifiers

I'll make first a prototype and post there the results, and if will work fine, will mount on my amplifier because the transformers are too heavy

@star882 can post there a better schematic?

Modify a PC power supply.
http://www.qrp4u.de/docs/en/powersupply/

[lorik199]

with that modification can ge only 13,8 v / 15 A
i need a simetrical power suply with + GND - at 25-30 Vcc

[Eva]

This circuit does not work well for variable loads like audio amplifiers because base current is not proportional to primary current and self oscillating frequency relies on transformer saturation.

The kind of circuit used in classic AT and ATX PC power supplies, with a current transformer for proportional drive and a TL494 for controlling switching frequency and duty cycle, works much much better.

Getting symmetrical output rails from one of these PC power supplies involves modifying the transformer, the rectifiers, the output inductor, output capacitors and feedback only. The output section of the PCB may be cut and replaced by a custom one for symmetrical rails.

[infinia]

F1 s/b in the mains hot input.
C6 is for initial startup boot.

The Xfrmer core gap is key.

[star882]

Originally posted by lorik199
with that modification can ge only 13,8 v / 15 A
i need a simetrical power suply with + GND - at 25-30 Vcc

Rewind the secondary.

[lorik199]

if I take a good pc power suply and I modify the secondaires it will work?
need to eliminate the 3,3v , +/-5 V , +/-12 V and replace with two simetrical secondaires for 20-30 V