Method for implementing a full input source power input control function on multiple power inputs to a single LLC converter in a distribution system

An electronic device comprising:

• a voltage-fed power converter including an input node, a ground node, and a first switch configured to connect the input node to the ground node in an operational state of the first switch;
• and
• a power source-selection circuit comprising:
• N power input circuits comprising N input nodes configured to connect to N power sources, respectively;
• an output node configured to connect to the input node of the power converter;
• and
• a control interface configured to receive at least one control signal from a control circuit for controlling operational/non-operational states of a plurality of switches within the N power input circuits,
• wherein among the N power input circuits, each respective power input circuit includes:
• a source-selection capacitor including a first terminal configured to connect to the ground node of the power converter;
• a power source-selection switch including a first terminal as a respective input node among the N input nodes and configured to connect a second terminal of the source-selection capacitor to the respective input node in the operational state of the power source-selection switch;
• and
• a voltage-fed converter switch including a first terminal connected to a second terminal of the power source-selection switch and configured to connect the second terminal of the source-selection capacitor to the output node of the power source-selection circuit in the operational state of the voltage-fed converter switch;
• and
• wherein the plurality of switches includes the power source-selection switch and the voltage-fed converter switch of the respective power input circuit.

A system comprising:

• a power source-selection circuit that comprises:
• N power input circuits comprising N input nodes configured to connect to N power sources, respectively;
• an output node configured to connect to an input node of a voltage-fed power converter;
• and
• a control interface configured to receive at least one control signal from a control circuit for controlling operational/non-operational states of a plurality of switches within the N power input circuits,
• wherein among the N power input circuits, each respective power input circuit includes:
• a source-selection capacitor including a first terminal configured to connect to a ground node of the power converter;
• a power source-selection switch including a first terminal as a respective input node among the N input nodes and configured to connect a second terminal of the source-selection capacitor to the respective input node in the operational state of the power source-selection switch;
• and
• a voltage-fed converter switch including a first terminal connected to a second terminal of the power source-selection switch and configured to connect the second terminal of the source-selection capacitor to the output node of the power source-selection circuit in the operational state of the voltage-fed converter switch;
• and
• wherein the plurality of switches includes the power source-selection switch and the voltage-fed converter switch of the respective power input circuit;
• and
• the control circuit configured to output the at least one control signal to the control interface.