Abstract: In a switch device, an output voltage output by a microcomputer is input to one end of a resistor. A driving circuit switches a main switch on or off according to a resistor voltage at the other end of the resistor. When all of a plurality of specific voltages included in a plurality of output voltages output by the microcomputer are an output threshold or more, an AND circuit of an adjustment circuit reduces the resistor voltage.

Abstract: In a control device for a vehicle, a first terminal is disposed downstream of a microcomputer in a current path through which a current flows through the microcomputer. The anode of a connection diode is connected to a connection node between the microcomputer and the first terminal. One end of a connection switch is connected to the cathode of the connection diode. A second terminal is connected to the other end of the connection switch. A switching circuit turns ON the connection switch from OFF when a voltage at the first terminal with respect to the potential of the second terminal increases to a threshold voltage or higher.

Abstract: A drive device drives a motor serving as a load. A first upstream switch is disposed upstream from the motor and a first downstream switch is disposed downstream from the motor in a first current path of current flowing via the motor. A second upstream switch is disposed upstream from the motor and a second downstream switch is disposed downstream from the motor in a second current path of current flowing via the motor. A direction of the current flowing in the motor when current flows in the first current path is different from a direction of the current flowing in the motor when current flows in the second current path. The first upstream drive circuit stops flow of current via the first upstream switch when the current flowing through the first upstream switch becomes greater than or equal to a current threshold.

Abstract: In a switch device, an output voltage output by a microcomputer is input to one end of a resistor. A driving circuit switches a main switch on or off according to a resistor voltage at the other end of the resistor. When all of a plurality of specific voltages included in a plurality of output voltages output by the microcomputer are an output threshold or more, an AND circuit of an adjustment circuit reduces the resistor voltage.

Abstract: In a first switch of a latch circuit, when the voltage between an emitter (input end) and a base (control end) has increased to a threshold voltage or more, the first switch is switched from off to on. The current that flows through a first resistor and a second resistor in that order is input to a collector (input end) of a second switch and a comparator switch. The second switch is switched on when the first switch is switched on. When the second switch or the comparator switch (third switch) is on, the voltage across the first resistor is the threshold voltage or more. A voltage is input to the emitter of the first switch from a microcomputer. A voltage is output from the collector of the second switch to a driving circuit.

Abstract: A power supply control device is to be installed in a vehicle. The power supply control device controls power supply via a semiconductor switch and a fuse by turning the semiconductor switch ON or OFF. The semiconductor switch and the fuse are mounted on a circuit board. In the fuse, two long plate-shaped terminals are arranged in a row. The fusing portion and a part of the two terminals are covered with a housing having heat resistance. The two terminals are disposed in a current path of a current flowing through the semiconductor switch. The current flows through the fusing portion. If the temperature of the fusing portion exceeds a predetermined temperature, the fusing portion is fused.

Abstract: A driving apparatus drives a load. An N-channel MOSFET is disposed downstream of the load on a current path of a current that flows via the load. A circuit resistor is connected between a direct current power source and the gate of the MOSFET. A first switch is connected between the gate and the source of the MOSFET. A microcomputer outputs a voltage relative to a potential at an output terminal of a second switch to a control terminal of the second switch. As a result, the second switch is turned ON or OFF. A switching circuit turns the first switch ON when the second switch is turned ON and turns the first switch OFF when the second switch is turned OFF.

Abstract: A power supply control apparatus controls power supply from a DC power source to a load by switching on or off a power supply FET. The current adjustment circuit adjusts the current flowing through the resistor circuit to a value obtained by dividing the voltage between the drain and the source of the power supply FET by the resistance value of the resistor circuit. A drive circuit switches off the power supply FET when a voltage across the detection resistor exceeds a predetermined voltage. The on-resistance value of the power supply FET fluctuates according on the ambient temperature of the power supply FET. The resistance value of the resistor circuit fluctuates in the same direction as the on-resistance value according to the ambient temperature of the power supply FET.

Abstract: The present invention provides an automatic guiding method of a vessel capable of controlling a deviation from the scheduled route/course to a value less than a constant value even if there is disturbance without necessitating a great amount of calculations, an automatic guiding program of a vessel, an automatic guiding system of a vessel and a vessel.

Abstract: A power supply control device controls power supply from a DC power source to a load, by turning on or off a MOSFET. A current regulation circuit regulates a current flowing through a device resistor to a current proportional to a voltage between the drain and the source of the MOSFET. A drive circuit turns off the MOSFET when a voltage across a resistor circuit exceeds a predetermined voltage. The on-resistance of the MOSFET varies according to an ambient temperature of the MOSFET. The resistance of the resistor circuit varies in a direction different from a direction in which the on-resistance of the MOSFET varies, according to the ambient temperature of the MOSFET.

Abstract: A driving apparatus drives a load. An N-channel MOSFET is disposed downstream of the load on a current path of a current that flows via the load. A circuit resistor is connected between a direct current power source and the gate of the MOSFET. A first switch is connected between the gate and the source of the MOSFET. A microcomputer outputs a voltage relative to a potential at an output terminal of a second switch to a control terminal of the second switch. As a result, the second switch is turned ON or OFF. A switching circuit turns the first switch ON when the second switch is turned ON and turns the first switch OFF when the second switch is turned OFF.

Abstract: A drive device drives a motor serving as a load. A first upstream switch is disposed upstream from the motor and a first downstream switch is disposed downstream from the motor in a first current path of current flowing via the motor. A second upstream switch is disposed upstream from the motor and a second downstream switch is disposed downstream from the motor in a second current path of current flowing via the motor. A direction of the current flowing in the motor when current flows in the first current path is different from a direction of the current flowing in the motor when current flows in the second current path. The first upstream drive circuit stops flow of current via the first upstream switch when the current flowing through the first upstream switch becomes greater than or equal to a current threshold.

Abstract: A heater drive apparatus functions as a power supply control apparatus, and controls power supply to an electrical heating wire. In the heater drive apparatus, a current output circuit and a detection resistor function as a current detection unit, and detect a current flowing through the electrical heating wire. A microcomputer repeatedly calculates an electrical heating wire temperature relating to the electrical heating wire based on the detected current. A drive circuit functions as a switching unit, and switches a switch on or off in accordance with the calculated electrical heating wire temperature.