公开(公告)号：US11448178B2

公开(公告)日：2022-09-20

申请号：US16969882

申请日：2019-02-22

Applicant: ROHM CO., LTD.

Inventor： Atsushi Taguchi ,  Akira Daicho

IPC: F02P3/055 ,  F02P3/04 ,  F02P11/00 ,  H01T15/00 ,  F02P3/05 ,  F02P3/045

Abstract: A switch control circuit controls a switch element connected to a primary coil of an ignition coil in accordance with an ignition signal. The switch element includes a transistor and a protection element connected between a collector and gate of the transistor. The switch control circuit uses a voltage at a gate terminal controlling the transistor or a voltage corresponding to a collector current of the transistor as a detection voltage and generates a status detection signal corresponding to a change in the detection voltage.

公开(公告)号：US20190293044A1

公开(公告)日：2019-09-26

申请号：US16356762

申请日：2019-03-18

Applicant: Rohm Co., Ltd.

Inventor： Akira Daicho ,  Atsushi Taguchi

IPC: F02P3/055 ,  H03K17/082 ,  H03K17/567 ,  F02N11/06 ,  F02P3/08

Abstract: An igniter includes a switch element with input, output control electrodes, a first lead in contact with the input electrode and connected to a primary coil of an ignition coil, a second lead that is grounded, a third lead spaced apart from the first and second leads, a first bonding wire connecting the output electrode and the third lead, a second bonding wire connecting the third lead and the second lead, and a control IC that drives the switch element based on an ignition instruction signal from an engine control unit. The control IC generates an ignition confirmation signal based on the voltage of the third lead, and outputs the signal to the engine control unit.

公开(公告)号：US12104565B2

公开(公告)日：2024-10-01

申请号：US18526180

申请日：2023-12-01

Applicant: ROHM CO., LTD.

Inventor： Hiroyuki Tanigawa ,  Atsushi Taguchi

IPC: F02P7/02 ,  H01L23/00 ,  H01L27/02 ,  F02P3/09 ,  F02P17/12

CPC classification number: F02P7/022 ,  H01L24/49 ,  H01L27/0266 ,  F02P3/093 ,  F02P2017/121 ,  H01L2224/4912

Abstract: Provided is an igniter capable of reducing occurrence of malfunction due to noise. An igniter (100) includes a switch element (111) having a first end, a temperature sensor (112) including at least one diode and having a cathode end (112B), a switch element control device (12) configured to control the switch element, and a switch element electrode (Pe) connected to the first end of the switch element and to the cathode end, and the switch element control device has a ground electrode (Pgnd) electrically isolated from the cathode end.

公开(公告)号：US11131286B2

公开(公告)日：2021-09-28

申请号：US16356762

申请日：2019-03-18

Applicant: Rohm Co., Ltd.

Inventor： Akira Daicho ,  Atsushi Taguchi

IPC: F02P3/055 ,  H03K17/082 ,  F02P3/08 ,  F02N11/06 ,  H03K17/567

Abstract: An igniter includes a switch element with input, output control electrodes, a first lead in contact with the input electrode and connected to a primary coil of an ignition coil, a second lead that is grounded, a third lead spaced apart from the first and second leads, a first bonding wire connecting the output electrode and the third lead, a second bonding wire connecting the third lead and the second lead, and a control IC that drives the switch element based on an ignition instruction signal from an engine control unit. The control IC generates an ignition confirmation signal based on the voltage of the third lead, and outputs the signal to the engine control unit.