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Pat. 10944321 United States, Int. Cl.22 H02M 3/158, H02M 3/07. Multi-level switching power converter, and controller circuit and control method thereof : Appl. N 16/653940 : Filed 15.10.2019 : Pub. 09.03.2021 : / Yung-Chun Chuang, Tsung-Wei Huang ; Assignee Richtek Technology Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10944321/en?oq=US10944321.html (дата обращения: ДД.ММ.ГГГГ).