ATX PS cuts out when chargers connected

[adamg]

ATX 600W power supply that works great except...
If the PS is powered on, then a Schulze 6-300d is plugged in, it will shut itself off until supply power is reset. If the Schulze is plugged in before powering up the PS, it works great. These Schulzes have the metal inductor on the power leads.

Apache chargers will also shut down the PS when a battery is connected to them, and the charger won't power on if the battery is connected prior to powering up.

Is there anything I can do? I take it some kind of power surge from the chargers is triggering some kind of safety in the PS. Should I put an inductor on each 12v line, or perhaps a capacitor across each yellow-black pair? If so, please include specs of the component(s).

Thanks.

[Andrew0820]

Overload latch to reset is a problem that many folks have experienced, especially with high capacity chargers or when attaching high capacity batteries. This seems to be cropping up more often with the increased usage of LiPo's. The two quick fixes are to boost the output voltage with an increased load and to attach the charger before powering up. The PS is designed to latch off when it senses an output impedance less than 0.1 ohms. Using the PS as a battery substitute falls outside the design parameters and overload shutdown may be a situation you cannot overcome -- a 600W PS should carry the load if you can keep it running.

I have not experimented with a load capacitor nor could I guarantee that it would not damage your charger. The PS is designed to power up with a capacitance load. If you tried an external CAP (at your own risk -- both personal and charger), then you might start with a large can aluminum electrolytic around 4700uf to 6800uf@50v.

[rjet]

I agree with Andrew. You shouldn't have to worry about adding a capacitor between the yellow and black wires, because the power supply is current limited. Also it often helps to load the 12v or 5v leads with a resistor to keep the supply sensing a "normal" load. A small inductor or resistor of around 0.1 ohms in series to the charger may help also.