Power system based on current source

A system comprising:

• an alternating current/direct current (AC/DC) converter configured to be coupled to a power source and generate a regulated current;
• and
• multiple power branching units, each power branching unit comprising:
• an input configured to receive the regulated current;
• an output configured to provide the regulated current;
• and
• multiple converter groups coupled between the input and the output, each converter group comprising:
• multiple direct current/direct current (DC/DC) converters;
• multiple protection devices each configured to selectively prevent one of the DC/DC converters from receiving the regulated current;
• and
• an active clamp configured to (i) temporarily sink a portion of the regulated current in response to one of the DC/DC converters failing and (ii) selectively shunt the regulated current around all of the DC/DC converters in response to all of the DC/DC converters failing.

A method comprising:

• receiving a regulated current at an input of a power branching unit;
• providing the regulated current from an output of the power branching unit;
• and
• passing the regulated current through multiple converter groups, each converter group comprising:
• multiple direct current/direct current (DC/DC) converters;
• multiple protection devices each configured to selectively prevent one of the DC/DC converters from receiving the regulated current;
• and
• an active clamp configured to (i) temporarily sink a portion of the regulated current in response to one of the DC/DC converters failing and (ii) selectively shunt the regulated current around all of the DC/DC converters in response to all of the DC/DC converters failing.