Current balancing in a multi-phase power supply

A method comprising:

• operating a controller in multiple control modes in which the controller controls multiple phases in a power supply to produce an output voltage, the output voltage supplying current to power a dynamic load;
• a) while in a first control mode of the multiple control modes:
• repeatedly activating each of the multiple phases in accordance with a predetermined activation order;
• b) while in a second control mode of the multiple control modes:
• for each of the multiple phases, producing a respective current value representative of an estimated amount of current supplied by that phase to the dynamic load;
• and
• modifying an order of activating the phases based on magnitudes of respective current values produced for the multiple phases;
• while the controller is operated in the first control mode:
• switching from operating the controller in the first control mode to operating the controller in the second control mode in response to detecting a variation in magnitude of the output voltage, the method further comprising:
• switching from operating in the first control mode to operating the controller in the second control mode based at least in part in response to detecting that a frequency of a monitored AC voltage component of the output voltage is above a frequency threshold value.