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Pat. 10224802 United States, Int. Cl.22 H02M 3/335, H02M 1/08, H02M 3/155, H02M 1/00, H02M 1/42. Methods for extending holdup times and/or reducing bulk capacitors in multi-stage switching power supplies : Appl. N 15/997439 : Filed 04.06.2018 : Pub. 05.03.2019 : / Sudhakarababu Chakkirala ; Assignee Astec International Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10224802/en?oq=US10224802.html (дата обращения: ДД.ММ.ГГГГ).