If so, how can I bypass it?
LM339N is low-Power low-offset voltage quad comparator.
No.
See equivalent circuit.
BTW the output is open collector.
What are examples of short circuit protection IC's? I have a 7 pin, 14 pin LM339n, and two 4 pin ICs in my PSU. @Boffin @LarryD
You have not given any information about the power supply and want to find out the functions of its components.
By the way, if you turn off the protection, there will come a time when the power supply or the load will fail.
I would look to see where the output current is sensed and work back from there...
Your short circuit protection is likely part of the switching circuit or switching IC and not a "discrete circuit"
Hi,
What powersupply is this in?
If it is a PC power supply, it could be for over voltage, and over current.
We need more information.
Thanks.. Tom..... 
In most SMPS units there's either a tl431 on one of the outputs that leads a sense signal back to the smps controller ic on the primary side, or there's a direct connection. Generally there is (should be) an optoisolator in the sense line to ensure galvanic isolation between the primary/HV side and secondary side. Short circuit protection AFAIK is always handled by the smps ic itself which of course is "aware" of the pwm signal that's required to provide the desired load; if it goes out of bounds, the unit shuts down. In somewhat bigger supplies this is usually done with a relay, in smaller units it's a "soft" shut down.
Am I the only one wondering why you’d want to do that?
No, you are not alone. 
Without knowing what your PSU is one can't be sure. However in most switching power supplies the operation of the circuit depends on knowing the current (even under normal conditions). If that were the case the decision to determine a short circuit is inside the control chip and cannot be disabled.
If you can find the current sensing devices, and they are resistors you could parallel them with another resistor and fool the supply into thinking it is supplying less current that it really is. It will not likely change the short circuit protection by much.
This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.