Oring control using low voltage device for high voltage DC rack

A protection circuit for protecting server racks connected to a power supply, the protection circuit comprising:

• an Oring circuit including a first MOSFET, a first diode connected in parallel with the first MOSFET, and first and second comparators operatively coupled to the first MOSFET, each of the first and second comparators supporting a maximum voltage difference that is less than an operational voltage of the power supply;
• and
• a clamping circuit including a second MOSFET and a second diode operatively coupled to the Oring circuit;
• and
• a Hotswap controller configured with a third MOSFET such that the third MOSFET is arranged with the Oring circuit and clamping circuit to disconnect a load from the power supply when there is a load side short of the protection circuit, and
• wherein each of the first and second comparators are configured to compare voltage at the first MOSFET with voltage at the second MOSFET, the first comparator being configured to switch the first MOSFET to an off condition according to the compared voltage and the second comparator being configured to switch the first MOSFET to an on condition according to the compared voltage, the second MOSFET being configured to clamp a node of the first comparator and a node of the second comparator to below the maximum voltage difference when there is a short at the power supply.