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:
May. 01, 2018
Filed:
Dec. 22, 2015
Boe Technology Group Co., Ltd., Beijing, CN;
Beijing Boe Energy Technology Co., Ltd., Beijing, CN;
Qingmeng Wang, Beijing, CN;
Xiaoyan Han, Beijing, CN;
BOE TECHNOLOGY GROUP CO., LTD., Beijing, CN;
BEIJING BOE TECHNOLOGY CO., LTD., Beijng, CN;
Abstract
The present disclosure provides an IGBT driving circuit, including an optocoupler chip and a power amplification circuit. The optocoupler chip includes an isolation amplification unit and a fault protection unit, and the fault protection unit includes a desaturation module and a fault feedback module. The desaturation module is configured to transmit a warning signal to the fault feedback module when detecting that a potential of a collector of the IGBT is overhigh or the potential of the collector of the IGBT changes overfast. The fault feedback module is configured to transmit a fault control signal to the external controller after receiving the warning signal so as to control the external driving signal outputted by the external controller and enable the isolation amplification unit to output an IGBT driving signal for controlling a shutdown of the IGBT.