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Pat. 11088631 United States, Int. Cl.22 H02M 7/48, H02M 3/07, H02M 3/158, H02M 7/487. Three-level DC-DC converter and voltage balancing circuit thereof : Appl. N 16/424636 : Filed 29.05.2019 : Pub. 10.08.2021 : / Wang Zhang, Chen Zhao ; Assignee Hangzhou Silergy Semiconductor Technology Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11088631/en?oq=US11088631.html (дата обращения: ДД.ММ.ГГГГ).