Patent ID: 11863084
Assignee: APPLE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of controlling a multi-output AC/DC adapter comprising a main power converter and a plurality of chopper stages, each chopper stage corresponding to one of the multiple outputs of the multi-output AC/DC adapter, the method being performed by control circuitry of the multi-output AC/DC adapter and comprising:
determining an output voltage of each of the multiple outputs of the multi-output AC/DC adapter;
regulating the main power converter to produce a voltage corresponding to a highest output voltage of the determined output voltages;
regulating each chopper stage to produce an output voltage corresponding to a respective output;
providing a reference voltage to the main power convertor, the reference voltage corresponding to the highest output voltage; and
providing a feedback voltage to the main power convertor, the feedback voltage being an output voltage of the chopper stage or stages having the highest output voltage.