CPC H02M 3/1584 (2013.01) [G01R 19/16528 (2013.01); G01R 19/175 (2013.01); H02M 1/0845 (2013.01); H02M 1/32 (2013.01); H02M 1/0009 (2021.05); H02M 1/0025 (2021.05)] | 20 Claims |
1. A method of controlling a multi-phase power converter having a plurality of power stage circuits coupled in parallel, the method comprising:
a) obtaining a load current of the multi-phase power converter;
b) controlling a number of power stage circuits that are enabled to operate in accordance with the load current, such that a switching frequency is maintained within a predetermined range when the load current changes; and
c) wherein when more than one power stage circuit is enabled to operate, each of the enabled plurality of power stage circuits operates under a critical conduction mode regardless of a change of the load current, and each main power switch in each corresponding enabled power stage circuit is turned on when a phase current corresponding to the power stage circuit drops to zero, and is turned off according to a feedback signal, such that a switching frequency is inversely proportional to the load current.
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