USB power management and load distribution system

A power management system includes a power management and load distribution (PMLD) circuit within an airplane coupled to an AC power source, at least one AC/DC conversion circuit operable to convert the AC power into a DC power, and at least one programmable output capability outlet (PPCO) circuit operable to receive the DC power. The PMLD circuit stores a predetermined maximum power limit, continuously measures a power output, and increases or decreases a power capability setting based on a comparison of the measured power output to the predetermined maximum power limit. The PPCO circuit includes a USB connector couplable to a personal electronic device (PED) of a passenger for charging the PED at an amount of DC power indicated by the power capability setting. The PPCO circuit is also operable to negotiate a power contract with the PED.