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Patent Searching and Data


Title:
SHORT-CIRCUIT PROTECTION CIRCUIT FOR SEMICONDUCTOR SWITCHING ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/008817
Kind Code:
A1
Abstract:
Provided is a short-circuit protection circuit (11) wherein a first gate resistor (12) is connected between a first output node (50) of a gate driver (27) and a first gate terminal (40). When it is detected that a short-circuit current is flowing to a first semiconductor switching element (9), a first real-time control circuit (10) operates to lower the potential of the first gate terminal (40). An operation monitoring circuit (11) includes a differential voltage circuit (20) configured to output the difference in potential between a potential that is proportional to the difference in potential between both terminals of the first gate resistor (12) and the potential of a first power supply (6). The operation monitoring circuit (11) monitors whether the first real-time control circuit (10) is operating on the basis of the output of the differential voltage circuit (20).

Inventors:
WADA, Yukihiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MORISAKI, Shota (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/006359
Publication Date:
January 10, 2019
Filing Date:
February 22, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H03K17/08
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (Nakanoshima Festival Tower West, 2-4 Nakanoshima 3-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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