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Pat. 11205922 United States, Int. Cl.22 H02J 9/06, H02M 1/10, H02J 7/00, H02M 3/335. System and method to increase a hold up time of a power supply unit : Appl. N 16/786689 : Filed 10.02.2020 : Pub. 21.12.2021 : / Tsai-Fu Hung, Rita Joy F. Miranda, Shih-Chieh Wang ; Assignee Dell Products Lp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11205922/en?oq=US11205922.html (дата обращения: ДД.ММ.ГГГГ).