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Title:
RELAY DRIVE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/181547
Kind Code:
A1
Abstract:
A relay drive circuit 10 is provided between an upstream relay RL1 and a downstream relay RL2 driven in accordance with the driving of the upstream relay RL1, and drives the downstream relay RL2. The relay drive circuit 10 comprises: a semiconductor element Q1 that switches the downstream relay RL2 on/off; a control input path LCN that is electrically connected to a control terminal G of the semiconductor element Q1 and has a power supply voltage Vb applied thereto via the upstream relay RL1; a protection element D1 that is inserted and connected to the control input path LCN and protects the semiconductor element Q1; and a buffer circuit 20 that is provided, in the control input path LCN, between the protection element D1 and the control terminal G of the semiconductor element and compensates for a voltage drop Vf resulting from the insertion of the protection element D1.

Inventors:
AOYAMA Shinji (1-14, Nishisuehiro-cho, Yokkaichi-sh, Mie 03, 〒5108503, JP)
KIMOTO Hiroshi (1-14, Nishisuehiro-cho, Yokkaichi-sh, Mie 03, 〒5108503, JP)
OSHITA Shinji (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
HAGIWARA Nobutoshi (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
TAKAYOSHI Kenichi (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
ONOYAMA Hiroki (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
MATSUMOTO Takumi (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
Application Number:
JP2019/009236
Publication Date:
September 26, 2019
Filing Date:
March 08, 2019
Export Citation:
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Assignee:
SUMITOMO WIRING SYSTEMS, LTD. (1-14, Nishisuehiro-cho Yokkaichi-sh, Mie 03, 〒5108503, JP)
TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 〒4718571, JP)
International Classes:
H01H47/00; H01H9/54; H01H47/32
Foreign References:
JPH08103001A1996-04-16
JP2013204451A2013-10-07
JPS52140751U1977-10-25
Attorney, Agent or Firm:
AKATSUKI UNION PATENT FIRM (5th Floor, Nittochi Nagoya Bldg. 1-1, Sakae 2-chome, Naka-ku, Nagoya-sh, Aichi 08, 〒4600008, JP)
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