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 (JP)
KIMOTO HIROSHI (JP)
OSHITA SHINJI (JP)
HAGIWARA NOBUTOSHI (JP)
TAKAYOSHI KENICHI (JP)
ONOYAMA HIROKI (JP)
MATSUMOTO TAKUMI (JP)
KIMOTO HIROSHI (JP)
OSHITA SHINJI (JP)
HAGIWARA NOBUTOSHI (JP)
TAKAYOSHI KENICHI (JP)
ONOYAMA HIROKI (JP)
MATSUMOTO TAKUMI (JP)
Application Number:
PCT/JP2019/009236
Publication Date:
September 26, 2019
Filing Date:
March 08, 2019
Export Citation:
Assignee:
SUMITOMO WIRING SYSTEMS (JP)
TOYOTA MOTOR CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
H01H47/00; H01H9/54; H01H47/32
Foreign References:
| JPH08103001A | 1996-04-16 | |||
| JP2013204451A | 2013-10-07 | |||
| JPS52140751U | 1977-10-25 |
Attorney, Agent or Firm:
AKATSUKI UNION PATENT FIRM (JP)
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