I need computer power supply Schematic using TL494

[dhanukak]

Hi All
Im want to convert 12V/5V PC power supply to 13.8V /10A output.Som if any any one has complete schematic diagram of PC power supply using TL494 pwm IC,then pls up load that.
Redards
Dhanuka

[guitar_joe]

http://www.pavouk.org/hw/en_atxps.html

heres one of many.

There are probably many designs out there, for what i've seen i'd say you would be looking at half - bridge with bjt power devices.

If u have a good understanding of how the supply works i'm sure you wont have too many technical difficulties as it doesnt require much re-engineering.

I've had quite an amount of fun taking the transformers apart lol, i've been there. Just dont shatter the core getting it out of the bobbin lol.

Btw these cores are good for home brew supplies too, whenever a pc supply breaks i salvage it.

Have fun, find a good article (eg silicon chip have a feature on this) and dont blow urself up! lol

[m-tech]

You need something like this: http://www.qrp4u.de/docs/en/powersupply/

[ifrythings]

Here's a schematic I modified because I have 3-4 of them units..

http://members.shaw.ca/tall_dude80/atxpsmod.PNG

[N-Channel]

dhanukak,

Here are some threads on AT/ATX Modification of three varieties:

1) +12V input
2) +12V-only output (really, +13.8V)
3) (+/-) Vouts for audio applications.

Can i use a computer power supply to power audio amplifiers?
Computer Power Supply for chip amp?
Using ATX PSU trans for 12V SMPS?
computer power supply
DC/DC converter using parts from PC PSU
ATX (computer) power supplies for power amp
Computer SMPS and Gainclone
PSU from a PC

Hope this helps,

Steve

[dhanukak]

Hello Guys,
Thanks for for earlist reply.Im new guy for this form.I checked all the links .Thats very useful to mee.
Thanking you
Dhanuka