公开(公告)号：US20190334516A1

公开(公告)日：2019-10-31

申请号：US16335421

申请日：2017-09-15

Applicant: Tohoku University

Inventor： Kazuki Itoh ,  Tetsuo Endoh

IPC: H03K17/06 ,  H01L27/088 ,  H01L29/10 ,  H01L29/08 ,  H01L29/78 ,  H01L29/423 ,  H01L29/417 ,  H02M3/158 ,  H02M1/08

Abstract: A switching circuit device includes high-side and low-side switching element circuits, and high-side and low-side drive circuits. The high-side switching element circuit includes a high-side switching element connected between an output terminal and a high-voltage terminal of a high voltage source. The low-side switching element circuit includes a low-side switching element connected between the output terminal and a reference potential terminal. The high-side drive circuit turns on the high-side switching element. The low-side drive circuit turns on the low-side switching element. The high-side drive circuit includes a bootstrap capacitor connected to a drive power source. The bootstrap capacitor is charged while the low-side switching element is ON. The high-side drive circuit applies a gate voltage to the high-side switching element while the low-side switching element is OFF. The gate voltage is defined by adding a voltage of the output terminal to a voltage of the bootstrap capacitor.

公开(公告)号：US10693449B2

公开(公告)日：2020-06-23

申请号：US16335421

申请日：2017-09-15

Applicant: Tohoku University

Inventor： Kazuki Itoh ,  Tetsuo Endoh

IPC: H02M3/158 ,  H03K17/06 ,  H01L27/088 ,  H01L29/08 ,  H01L29/10 ,  H01L29/417 ,  H01L29/423 ,  H01L29/78 ,  H02M1/08 ,  H02M1/00

Abstract: A switching circuit device includes high-side and low-side switching element circuits, and high-side and low-side drive circuits. The high-side switching element circuit includes a high-side switching element connected between an output terminal and a high-voltage terminal of a high voltage source. The low-side switching element circuit includes a low-side switching element connected between the output terminal and a reference potential terminal. The high-side drive circuit turns on the high-side switching element. The low-side drive circuit turns on the low-side switching element. The high-side drive circuit includes a bootstrap capacitor connected to a drive power source. The bootstrap capacitor is charged while the low-side switching element is ON. The high-side drive circuit applies a gate voltage to the high-side switching element while the low-side switching element is OFF. The gate voltage is defined by adding a voltage of the output terminal to a voltage of the bootstrap capacitor.