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Pat. 9960680 United States, Int. Cl.22 H02M 3/156, H02M 1/08, H02M 1/14, H02M 3/158, H02M 1/00. Control apparatus, switching power supply and control method for maintaining power conversion efficiency : Appl. N 15/204839 : Filed 07.07.2016 : Pub. 01.05.2018 : / Toru Miyamae ; Assignee Cypress Semiconductor Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9960680/en?oq=US9960680.html (дата обращения: ДД.ММ.ГГГГ).