Thread: PC Power Switch - IC 2003

HI all,

I have a PC power switch that I'd like to modify to a fixed and stabilized 12 volts.
I know how to modify power switch with controller IC TL494, but this one I have has the following controller IC:
2003
IFF67K0224E

There is no datasheet available for tihs type of IC, anyone knows where can I find informations about this IC?
This power switch is Maxxtro Model LC-A400ATX

Rgds

RenatoBR

More information about this PC power supply:

On the label of the Power supply: Powered by Tsunami
: Maxxtro Model LC-A400ATX

On the link below there is a schematic:

http://www.forumnow.com.br/vip/mensa...998242&nrpag=1

Here is a link with the procedure to convert PC power supply that use IC TL494
without using a resistor 10R x10W.

http://picayzumba.com/contentid-68.html


Renato

I don't know this chip, but it seems it includes a magamp controller, in addition to the normal PWM stuff.

It seems to me the feedback is done with R62,R60, etc.
If you only need the 12V well regulated, then take out R62 and adjust R60 to obtain the correct 12V at the output. 3.3V should also be well regulated, as it is controlled separately.

I made the modification like I normaly do with TL494 and it worked.


Renato