Toyota Jidosha Kabushiki Kaisha

Denso Electronics Corporation

Yoshio Nishino

Jiro Ito

Manabu Morita

Yasuo Naruse

A power distribution device includes a first switch configured to connect a power supply source or a first device to a second device, a second switch configured to connect the second device and a third device distributing predetermined power, and a control unit configured to control conduction and cutoff of the first and the second switches based on an output voltage of the power distribution device. The control unit switches the first switch to a conductive state and the second switch to a cutoff state when an input voltage of the second device does not drop to a predetermined control start voltage, and switches, when the input voltage of the second device temporarily drops to the control start voltage, the first switch to the cutoff state and the second switch to the conductive state, and supplies the power from the third device to the second device.

Power distribution device

A power supply circuit for supplying power to an electric load of a vehicle includes a relay and a relay control circuit. The relay is configure to be turned on when enabling the supply of power to the electric load and configured to be turned off when interrupting the supply of power to the electric load. The relay control circuit is configured to turn on the relay when an ignition of the vehicle is on regardless of a state of an operation part that is to be operated by a driver to operate the electric load.

Growing community of inventors

Ichinomiya, Japan

Yoshio Nishino