Method and system for voltage independent power supply load sharing

A system for two-supply load sharing, comprising:

• a first current supply path coupled to a first power source;
• a second current supply path coupled to a second power source;
• a system load coupled to outputs of both the first and second current supply paths to receive first and second current supplies;
• and
• a current balancing control element configured to generate a first control signal based on first and second currents flowing through the first and second current supply paths, respectively, wherein
• the first control signal is used to control a first voltage drop along the first current supply path so that the corresponding first and second current supplies are equalized.

A system for an N-supply load sharing, comprising:

• N current supply paths, where N>1, coupled to corresponding N independent power sources, respectively;
• a system load coupled to outputs of the N current supply paths to receive N current supplies;
• and
• a common current share bus configured to connect to the N current supply paths, providing a common current share signal, indicating a current contribution needed from each of the N current supply paths, wherein
• each of the N current supply paths adjusts a voltage drop between its power source and its corresponding current supply in accordance with the common current share signal so that the current supplied is consistent with the common current share signal.