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Pat. 11283365 United States, Int. Cl.22 H02M 3/335, H02M 1/08, H02M 7/162, H02M 7/483, H02M 1/00. Switch-mode power supplies including three-level LLC circuits : Appl. N 16/916925 : Filed 30.06.2020 : Pub. 22.03.2022 : / James Sigamani ; Assignee Astec International Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11283365/en?oq=US11283365.html (дата обращения: ДД.ММ.ГГГГ).