Multiple port power supply system

An apparatus for multi-port power delivery, the apparatus comprising:

• a switched-mode power supply configured to:
• receive an input AC voltage, and
• produce a sequence of pulses of equal energy;
• two or more ports at which power is to be delivered at DC voltages specified by corresponding devices connected to the ports for charging;
• and
• time-division multiplexing circuitry configured to deliver, to the ports, power at respective levels that add to a maximum power corresponding to the sequence,
• wherein the time-division multiplexing circuitry includes:
• port-monitoring circuitry configured to monitor variations in power needs of corresponding ports, and
• a multiplexer module configured to:
• receive the sequence,
• dispatch different integer numbers of pulses, as the sequence is being received, to corresponding ports in proportion to the respective power levels,
• switch the dispatching of pulses from one port to another based on the monitored variations in the power needs of the corresponding ports, and
• cause the switching to occur between the last pulse of each dispatch and the first pulse of the subsequent dispatch,
• wherein the switched-mode power supply is configured to:
• receive notification from the time-division multiplexing circuitry relating to an instant port to which pulses are being dispatched, and
• modify production of the pulses of the sequence in compliance with the DC voltage specification for the instant port.