CPC H02M 1/4225 (2013.01) [H02M 1/44 (2013.01); H02M 3/24 (2013.01)] | 20 Claims |
1. A switched mode power supply (SMPS) comprising:
an AC input configured to receive an AC input voltage and an AC input current;
a filter coupled to the AC input;
a power factor correction (PFC) circuit coupled to the filter and configured to receive a PFC AC current from the filter; and
a control circuit coupled to the AC input and to the PFC circuit and configured to:
determine a reactive current flowing through the filter and not provided to the PFC circuit;
determine the PFC AC current; and
determine the AC input current based on the determined reactive current and the determined PFC AC current.
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