公开(公告)号：US20220274549A1

公开(公告)日：2022-09-01

申请号：US17631786

申请日：2020-08-14

Applicant: Hitachi Astemo, Ltd.

Inventor： Takumi MASUBUCHI ,  Masahiro DOI

IPC: B60R16/023 ,  G01R31/327 ,  H01H47/00

Abstract: Even when a power supply relay cannot be turned off and when power supply to a microcomputer is normally cut off, fixing of the power supply relay is detected. An electronic control device 100 according to an aspect of the present invention includes a relay drive circuit 13 that controls on and off of a power supply relay 12 according to information about the on and off of power supply, an electronic circuit (first power supply system block 110, microcomputer 102) that operates at a first power supply voltage (V1) supplied from a battery 10 through the power supply relay 12, and a monitoring unit (second power supply system block 120) that monitors the first power supply voltage when the power supply is turned off, and holds a monitoring result, the first power supply voltage reflecting presence or absence of fixing of the power supply relay.

公开(公告)号：US20240186822A1

公开(公告)日：2024-06-06

申请号：US18285670

申请日：2021-08-20

Applicant: Hitachi Astemo, Ltd.

Inventor： Masafumi YAMAMOTO ,  Takumi MASUBUCHI

IPC: H02J9/06 ,  G11C5/14

CPC classification number: H02J9/068 ,  G11C5/141

Abstract: A power supply control device includes: a plurality of power supply circuits; a control circuit that controls the power supply circuits; an output current monitor that monitors output currents of the power supply circuits; and a storage unit in which any one of a plurality of operation modes for controlling the power supply circuits is settable. The control circuit controls the power supply circuits based on the operation mode set in the storage unit and the output currents monitored by the output current monitor.

公开(公告)号：US20240372547A1

公开(公告)日：2024-11-07

申请号：US18285783

申请日：2021-08-05

Applicant: Hitachi Astemo, Ltd.

Inventor： Takumi MASUBUCHI

IPC: H03K17/687 ,  H03K17/08 ,  H03K17/14

Abstract: A first semiconductor relay and a second semiconductor relay connected in parallel to each other, an input switching circuit that switches a path of a signal input to the first and second semiconductor relays, an output switching circuit that switches a path of a signal output from the first and second semiconductor relays, and a monitoring unit that performs abnormality detection and warning for the first and second semiconductor relays are provided. In addition, one of a redundancy mode in which the input switching circuit is controlled such that inputs of the first and second semiconductor relays are shared in response to a first setting signal from the outside and the output switching circuit is controlled such that only one of the first and second semiconductor relays performs output and a non-redundancy mode in which the input switching circuit and the output switching circuit are controlled such that inputs and outputs of the first and second semiconductor relays are different from each other is implemented.

公开(公告)号：US20240396762A1

公开(公告)日：2024-11-28

申请号：US18696057

申请日：2021-10-07

Applicant: Hitachi Astemo, Ltd.

Inventor： Takahiro KOIKE ,  Takumi MASUBUCHI

IPC: H04L12/40 ,  H04L69/14 ,  H04L69/40

Abstract: A communication semiconductor device according to the present invention includes: a first communication circuit and a second communication circuit; a first switchover function unit that is connected to one end of the first communication circuit and one end of the second communication circuit, and that switches over paths for signals with respect to the first communication circuit and the second communication circuit; and a second switchover function unit that is connected to an other end of the first communication circuit and an other end of the second communication circuit, and that switches over paths for signals with respect to the first communication circuit and the second communication circuit, and outputs a switchover instruction, regarding an input destination and an output source, to the first switchover function unit and the second switchover function unit, on the basis of a redundant/non-redundant mode switchover signal, and a state of the first communication circuit and the second communication circuit.