ATX PSU, 13.8v

[dimitris1977]

Re: ATX PSU, 13.8v

I haven't had trouble increasing the voltage on this supply; it is stable at 14v using a single variable resistor, though admittedly it won't go much higher. The supply uses an ATX-2005Z PWM Controller which has the ability to monitor the 3.3v, 5v, and 12v rails.

Ripple voltage on the output is well within acceptable limits, <20mv at idle and <75mv under a steady load. Problems only arise when the load is extremely transient and knocking on 15 amps, as in the case of transmitting in SSB mode.

i have 2005z, what single variable resistor have you use and where did you conect it to increase the voltage?

[oa4asd]

Re: ATX PSU, 13.8v

i have the same cuestion!!! and the same ic...

[stj]

Re: ATX PSU, 13.8v

if you have a pulsed load, increase the capacitors to handle more ripple - a lot more!

[Pinhead]

Re: ATX PSU, 13.8v

i have 2005z, what single variable resistor have you use and where did you conect it to increase the voltage?

i have the same cuestion!!! and the same ic...

http://boginjr.com/electronics/lv/atx-mod/

[SURYA2K]

I had the same chip 2005z in my smps, can somebody give schematic of modifications to get 13.8v output.