Modular direct current power source

A welding system comprising:

• a welding power supply configured to provide a direct current power;
• and
• a power converter comprising:
• a plurality of hysteretic buck converters coupled in parallel and configured to receive a common input and to provide combined output power to a common load based upon the common input;
• and
• a boost converter coupled to the hysteretic buck converters and configured to provide power to the common input of the hysteretic buck converters,
• wherein the power converter is configured to receive the direct current power from the welding power supply.

A power supply system comprising:

• hysteretic buck converters, each hysteretic buck converter comprising:
• a first input node and a first output node, wherein:
• the first input nodes of the hysteretic buck converters are coupled together to receive a common input, and
• the first output nodes of the hysteretic buck converters are coupled together to provide combined output power to a common load based upon the common input;
• and
• a boost converter coupled to the hysteretic buck converters and configured to provide power as the common input of the hysteretic buck converters.