公开(公告)号：US10897206B2

公开(公告)日：2021-01-19

申请号：US16280241

申请日：2019-02-20

申请人： FAIRCHILD SEMICONDUCTOR CORPORATION

发明人： Zhibo Tao ,  Jung-Sheng Chen ,  Li Lin ,  Kai-Fang Wei ,  Chih-Hsien Hsieh ,  Hangseok Choi ,  Yue-Hong Tang

IPC分类号： H02M3/335 ,  H02M1/00

摘要： A switched-mode power supply with near valley switching includes a quasi-resonant converter. The converter includes a switch element that is turned on not only at the valley, but also in a window range of ΔtNVW close to the valley, where the voltage across the switch element is at its minimum. This advantageously reduces switching loss and maintains a balance between efficiency and frequency variation.

公开(公告)号：US10256735B2

公开(公告)日：2019-04-09

申请号：US15053263

申请日：2016-02-25

申请人： FAIRCHILD SEMICONDUCTOR CORPORATION

发明人： Zhibo Tao ,  Jung-Sheng Chen ,  Li Lin ,  Kai-Fang Wei ,  Chih-Hsien Hsieh ,  Hangseok Choi ,  Yue-Hong Tang

IPC分类号： H02M3/335 ,  H02M1/00

摘要： A switched-mode power supply with near valley switching includes a quasi-resonant converter. The converter includes a switch element that is turned on not only at the valley, but also in a window range of ΔtNVW close to the valley, where the voltage across the switch element is at its minimum. This advantageously reduces switching loss and maintains a balance between efficiency and frequency variation.