Abstract: In a power supply control device, a temperature calculation circuit calculates a wire temperature of a wire based on the current value of a current flowing through the wire. If the wire temperature calculated by the temperature calculation circuit is lower than a temperature threshold value, a drive unit switches on or off a switch in accordance with content indicated by a control signal output by a communication unit. When the wire temperature calculated by the temperature calculation circuit rises to the temperature threshold value or higher, the drive unit switches off the switch independently of content indicated by a control signal output by the communication unit.

Abstract: Provided is a power supply control device for controlling power supply to a motor installed in a vehicle, including: a switching element configured to turn on and off the power supply to the motor; a current detection circuit configured to detect a current flowing to the motor; and a control unit configured to determine whether or not the motor is in a locked state based on the current detected by the current detection circuit, and control turning on and off the power supply to the motor at a duty cycle that corresponds to the current detected by the current detection circuit, if it is determined that the motor is in the locked state.

Abstract: A circuit apparatus is mounted in a vehicle. In a circuit board, a plurality of first conductive patterns and a second conductive pattern are disposed on an insulating layer. An integrated circuit device is disposed on the plurality of first conductive patterns. The integrated circuit device is electrically connected to the plurality of first conductive patterns. A busbar is connected to the second conductive pattern.

Abstract: In a drive device, a first connection circuit, a second connection circuit, and a third connection circuit are connected individually between an input end and an output end. A first motor is connected between a connection node between a first input switch and a first output switch of the first connection circuit and a connection node between a third intermediate switch and a third output switch of the third connection circuit. A second motor is connected between a connection node between a second input switch and a second output switch of the second connection circuit and a connection node between a third input switch and the third intermediate switch of the third connection circuit.

Abstract: In a power feeding control device, N-channel first FET and second FET are located in a current path for current flowing from a positive terminal to a negative terminal. The drain of the first FET is located downstream of the source. The drain of the second FET is located upstream of the source. The cathode of a first diode is connected to the negative terminal. A first drive circuit and a second drive circuit switch ON or OFF the first FET and the second FET by adjusting the gates of the first FET and the second FET, with respect to the cathode of the first diode.

Abstract: In a drive device, a first connection circuit, a second connection circuit, and a third connection circuit are connected individually between an input end and an output end. A first motor is connected between a connection node between a first input switch and a first output switch of the first connection circuit and a connection node between a third intermediate switch and a third output switch of the third connection circuit. A second motor is connected between a connection node between a second input switch and a second output switch of the second connection circuit and a connection node between a third input switch and the third intermediate switch of the third connection circuit.

Abstract: In a power supply control device, a switching device turns a main switch on or off to control supply of power via the main switch. When a battery supplies power to the switching device, a fuse is disposed in a first current path of an output current output from the switching device. A diode is disposed in a second current path of the output current different from the first current path. If a current flowing through the fuse increases to or above a first threshold, the fuse blows. If a current flowing through the diode increases to or above a second threshold, the diode blows.

Abstract: Provided is a power supply control device for controlling power supply to a motor installed in a vehicle, including: a switching element configured to turn on and off the power supply to the motor; a current detection circuit configured to detect a current flowing to the motor; and a control unit configured to determine whether or not the motor is in a locked state based on the current detected by the current detection circuit, and control turning on and off the power supply to the motor at a duty cycle that corresponds to the current detected by the current detection circuit, if it is determined that the motor is in the locked state.

Abstract: In a power supply control device, a temperature calculation circuit calculates a wire temperature of a wire based on the current value of a current flowing through the wire. If the wire temperature calculated by the temperature calculation circuit is lower than a temperature threshold value, a drive unit switches on or off a switch in accordance with content indicated by a control signal output by a communication unit. When the wire temperature calculated by the temperature calculation circuit rises to the temperature threshold value or higher, the drive unit switches off the switch independently of content indicated by a control signal output by the communication unit.

Abstract: In a power supply control device, a switching device turns a main switch on or off to control supply of power via the main switch. When a battery supplies power to the switching device, a fuse is disposed in a first current path of an output current output from the switching device. A diode is disposed in a second current path of the output current different from the first current path. If a current flowing through the fuse increases to or above a first threshold, the fuse blows. If a current flowing through the diode increases to or above a second threshold, the diode blows.

Abstract: Provided is a control device that stops the power supply when the first FET is short-circuited. In the control device, a boost circuit increases the voltage of one end of a resistor on the boost circuit side to a predetermined voltage that is higher than the source voltage of the first FET. An AND circuit instructs the discharge circuit to decrease the voltage at the other end of the resistor when the voltage at the other end of the resistor is less than a threshold voltage if the AND circuit instructs the boost circuit to increase the voltage at the one end of the resistor on the boost circuit side. The threshold voltage exceeds the voltage at the one end of the resistor if the voltage at the one end of the resistor on the boost circuit is the predetermined voltage and if the first FET is short-circuited.

Abstract: A power supply control device controls power supply via a switch by causing a drive circuit to turn on and off the switch. A first resistance is disposed on a path of a current flowing via the switch. A differential amplifier outputs a voltage corresponding to a value of a voltage between two ends of the first resistance. A first capacitor is connected between a point midway on a path of power supply to the differential amplifier and an upstream end of the first resistance. A second capacitor is connected between a point midway on the path of power supply and a downstream end of the first resistance.

Abstract: Provided is a control device that stops the power supply when the first FET is short-circuited. In the control device, a boost circuit increases the voltage of one end of a resistor on the boost circuit side to a predetermined voltage that is higher than the source voltage of the first FET. An AND circuit instructs the discharge circuit to decrease the voltage at the other end of the resistor when the voltage at the other end of the resistor is less than a threshold voltage if the AND circuit instructs the boost circuit to increase the voltage at the one end of the resistor on the boost circuit side. The threshold voltage exceeds the voltage at the one end of the resistor if the voltage at the one end of the resistor on the boost circuit is the predetermined voltage and if the first FET is short-circuited.