Chaging PC POWER SUPPLY SUPERVISOR output voltage

[sam_sam_sam]

I have a computer power supply I want to change the output voltage from 12 volts to 14 volts What would I need to change in order for this to work
It use this chip
Weltrend WT7527
PC POWER SUPPLY SUPERVISOR CHIP


I will post a photo of the board later today

But it look very much like the board in this post
https://www.badcaps.net/forum/showthread.php?t=32032

[Escort Eagle]

Re: Chaging PC POWER SUPPLY SUPERVISOR output voltage

You need to change the Main Transformer or you have to rewind it and add few turns to get 14V .

[tom66]

Re: Chaging PC POWER SUPPLY SUPERVISOR output voltage

In most cases, locating the feedback circuit and increasing the top resistor in the pair, or bottom resistor, will increase the output voltage. You typically can get an additional 30% to 100%.

[sam_sam_sam]

Re: Chaging PC POWER SUPPLY SUPERVISOR output voltage

I want to thank both of you for the info

[ben7]

Re: Chaging PC POWER SUPPLY SUPERVISOR output voltage

The way tom suggested is the best way to change the voltage, however there are limits. Eventually, you will need to change the windings on the transformer to get a higher or lower voltage, BUT, only a 2v difference should not cause that much trouble.

I suggest changing the lower resistor in the feedback voltage divider.

[domas]

Re: Chaging PC POWER SUPPLY SUPERVISOR output voltage

http://boginjr.com/electronics/lv/atx-mod/
3 components to do that, use this mod myself, good luck