Patent ID: 8159802

Claim:
A power supply that converts three-phase AC power to DC power, comprising: a first, second and third converter assembly, each said converter assembly responsive to one of a first, second and third single-phase AC inputs and supplying a DC power supply output; each converter assembly comprising: (a) an EMI filter adapted to receive one of said first, second and third single-phase AC inputs; (b) an AC-to-DC power factor correction circuit coupled to an output of said EMI filter; (c) a DC-to-DC isolated converter coupled to an output of said AC-to-DC power factor correction circuit; (d) a first and second converter output line; wherein each of said first converter output lines are electrically coupled to one another and wherein each of said second converter output lines are electrically coupled to one another as well as to a ground connection for forming the DC power supply output; at least one temperature sensor; at least one current sensor; a plurality of optocouplers arranged in a latch configuration and responsive to the at least one temperature sensor and current sensor for shutting off at least one of the DC-to-DC converters upon detection of an overcurrent or temperature condition by entering a state that causes the at least one of the DC-to-DC converters to be disabled until power is recycled.