Power supply

A power supply configured to provide two power outputs, the power supply comprising:

• a first conversion circuit configured to convert an input voltage into a first voltage;
• a second conversion circuit coupled to the first conversion circuit, and the second conversion circuit configured to convert the first voltage into a second voltage;
• a control circuit coupled to the first conversion circuit and the second conversion circuit, a first switching circuit coupled to the control circuit, the first conversion circuit, a first output terminal, and a second output terminal;
• a second switching circuit coupled to the control circuit, the first output terminal, and the second output terminal;
• and
• a switching switch coupled to the control circuit, the second conversion circuit, and the second switching circuit;
• wherein when the control circuit receives a first voltage requirement of the first output terminal or a second voltage requirement of the second output terminal, the control circuit is configured to control the first switching circuit to connect a path from the first conversion circuit to the first output terminal when the first voltage requirement is received, and disconnect a path from the first conversion circuit to the second output terminal, and the control circuit controls the switching switch and the second switching circuit to disconnect a path from the second conversion circuit to the first output terminal and a path from the second conversion circuit to the second output terminal so as to prevent the first voltage from flowing back to the second conversion circuit or the second voltage from being mistakenly supplied to the first output terminal and the second output terminal, and
• wherein when the first conversion circuit is configured to provide the first voltage to one of the first output terminal and the second output terminal through the first switching circuit, and the control circuit determines that the other of the first output terminal and the second output terminal is connected to a load, the control circuit is configured to control the second conversion circuit to provide a default voltage through the switching switch and the second switching circuit to the other of the first output terminal and the second output terminal to communicate to determine the first voltage requirement or the second voltage requirement, and therefore to decide that the first conversion circuit or the second conversion circuit is configured to supply power to the other of the first output terminal and the second output terminal.