The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2019
Filed:
Jan. 22, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
Shinji Sakai, Tokyo, JP;
Hisashi Oda, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A control circuit includes an inverter circuit including a high-side MOSFET and a low-side MOSFET connected to form a totem-pole, a first gate driver configured to switch the low-side MOSFET, a second gate driver configured to switch the high-side MOSFET, a bootstrap circuit configured to supply a voltage to the second gate driver, and a detection section configured to issue an anomaly signal when a current larger than a predetermined value flows in the inverter circuit. In response to the issuing of the anomaly signal, the low-side MOSFET is turned off, and the high-side MOSFET is turned off. After that, in a state in which a freewheeling current is flowing through the low-side MOSFET, the low-side MOSFET is turned on to prevent a bootstrap capacitor of the bootstrap circuit from being overcharged.