Power Supply Units in Server Computers

A power supply, comprising:

• a first power interface for receiving a first power supply signal;
• a second power interface for receiving a second power supply signal;
• a power converter coupled to the first power interface and the second power interface, wherein the power converter is configured to generate a plurality of DC power supplies based on at least one of the first power supply signal and the second power supply signal;
• and
• a controller coupled to at least the first power interface and the second power interface, wherein the controller is configured to select the at least one of the first power supply signal and the second power supply signal via the first power interface and the second power interface independently of each other to be input into the power convert for generating the plurality of DC power supplies.

A method for providing power to a server, comprising:

• receiving a first power supply signal;
• receiving a second power supply signal;
• while controlling the first power interface and the second power interface independently of each other, selecting at least one of the first power supply signal and the second power supply signal;
• generating a plurality of DC power supplies based on the at least one of the first power supply signal and the second power supply signal.