US 11,916,547 B2
Semiconductor relay device
Naoya Takai, Yukuhashi Fukuoka (JP); Yukihiro Takifuji, Chikujo Fukuoka (JP); Keita Saito, Buzen Fukuoka (JP); and Kazuki Tanaka, Kitakyushu Fukuoka (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed on Sep. 2, 2022, as Appl. No. 17/902,737.
Application 17/902,737 is a continuation of application No. 17/473,889, filed on Sep. 13, 2021, granted, now 11,476,850.
Claims priority of application No. 2021-048949 (JP), filed on Mar. 23, 2021.
Prior Publication US 2022/0416787 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 17/00 (2006.01); H03K 17/081 (2006.01); H03K 17/687 (2006.01); H03K 17/73 (2006.01)
CPC H03K 17/6874 (2013.01) [H03K 17/08108 (2013.01); H03K 17/73 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A semiconductor relay device comprising:
a transmission circuit that outputs a first signal;
a conversion circuit configured to output a second signal that is based on the first signal over a period of receiving the first signal;
an overheat protection circuit that keeps outputting a control signal having a first magnitude using the second signal over a period of receiving the second signal and having a temperature lower than a first temperature, transitions to a state in which the overheat protection circuit outputs the control signal having a second magnitude using the second signal when the overheat protection circuit has a temperature higher than or equal to the first temperature during a period of receiving the second signal, and keeps outputting the control signal having the second magnitude once the overheat protection circuit has a temperature higher than or equal to the first temperature; and
a switch circuit that electrically connects a first terminal and a second terminal over a period of receiving the control signal having the first magnitude, and electrically disconnects the first terminal and the second terminal over a period of receiving the control signal having the second magnitude.