US 11,716,016 B2
Power measurements in switched mode power supplies
PengFei Li, ShenZhen (CN); XiaoLin He, ShenZhen (CN); HaiJun Zhang, ShenZhen (CN); XunJiang Dai, ShenZhen (CN); and Liang Meng, ShenZhen (CN)
Assigned to Astec International Limited, Kowloon (HK)
Filed by Astec International Limited, Kowloon (HK)
Filed on May 23, 2022, as Appl. No. 17/664,488.
Application 17/664,488 is a continuation of application No. 16/960,353, filed on Jul. 7, 2020, granted, now 11,349,387.
Prior Publication US 2022/0286044 A1, Sep. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 1/42 (2007.01); H02M 1/44 (2007.01); H02M 3/24 (2006.01)
CPC H02M 1/4225 (2013.01) [H02M 1/44 (2013.01); H02M 3/24 (2013.01)] 20 Claims
OG exemplary drawing
 
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.