公开(公告)号：US11005306B2

公开(公告)日：2021-05-11

申请号：US16368790

申请日：2019-03-28

Applicant: Integrated Device Technology, Inc.

Inventor： Tao Qi ,  Gustavo Mehas ,  Chan Young Jeong ,  Xinyun Gu ,  Nicholaus Smith ,  Amit D. Bavisi ,  Daryl Sugasawara ,  Aihua Lee

IPC: H02J50/70 ,  H02J7/02 ,  H02J50/10

Abstract: Embodiments described herein provide a wireless power transmitter that dynamically adjusts the deadtime to reduce power loss. Specifically, the wireless power transmitter includes a transistor circuit for switching a first voltage at a first node and a second voltage at a second node, and a LC circuit coupled between the first node and the second node. The wireless power transmitter further includes a controller coupled to the transistor circuit. The controller is configured to determine whether either of the first voltage and the second voltage is negative during a deadtime of switching. The controller is configured to increment or decrement the deadtime by an adjustment amount depending on whether negative voltage is detected.