In a power-supply control device, power supply to loads is controlled by driving circuits separately switching on or off FETs, respectively. In a state in which the connection destination of a fuse element is the FET, a microcomputer provides an instruction to switch the FET off. Then, the microcomputer determines whether or not a current is flowing through the FET. Upon determining that a current is flowing through the FET, the microcomputer switches the connection destination of the fuse element to the FETs, and provides an instruction to switch the FET on.

Disclosed herein is a clamper including a current source that is connected between an external electrode and an internal node and generates a predetermined constant current, a diode having an anode connected to the internal node, and a current mirror that generates a second current corresponding to a first current flowing via the diode and draws the second current from the internal node to a reference voltage node.

Disclosed herein is a clamper including a current source that is connected between an external electrode and an internal node and generates a predetermined constant current, a diode having an anode connected to the internal node, and a current mirror that generates a second current corresponding to a first current flowing via the diode and draws the second current from the internal node to a reference voltage node.

A circuit board and a battery connection module are provided. The circuit board has an insulating substrate and a plurality of circuit traces provided thereto. At least one of the traces is provided with a fuse unit. The fuse unit has a main fuse and at least one spare fuse. The main fuse has two main trace connection end portions respectively positioned at two ends of the main fuse and connected to the trace and a main fuse section connected between the two main trace connection end portions. The spare fuse has two trace connection end portions respectively positioned at two ends of the spare fuse and a fuse section connected between the two trace connection end portions, the fuse section and the main fuse section are spaced apart from each other and arranged side by side, and at least one of the two trace connection end portions is not connected with the trace so as to form an electrical disconnection with the trace, and after the main fuse section forms an electrical disconnection, the two trace connection end portions are connected to the trace so that a current conductive path is formed by the spare fuse and the trace.

A circuit board and a battery connection module are provided. The circuit board has an insulating substrate and a plurality of circuit traces provided thereto. At least one of the traces is provided with a fuse unit. The fuse unit has a main fuse and at least one spare fuse. The main fuse has two main trace connection end portions respectively positioned at two ends of the main fuse and connected to the trace and a main fuse section connected between the two main trace connection end portions. The spare fuse has two trace connection end portions respectively positioned at two ends of the spare fuse and a fuse section connected between the two trace connection end portions, the fuse section and the main fuse section are spaced apart from each other and arranged side by side, and at least one of the two trace connection end portions is not connected with the trace so as to form an electrical disconnection with the trace, and after the main fuse section forms an electrical disconnection, the two trace connection end portions are connected to the trace so that a current conductive path is formed by the spare fuse and the trace.

An electrical device includes a first terminal structured to electrically connect to a power source; a second terminal structured to electrically connect to a load; a voltage sensor electrically connected to a point between the first and second terminals and being structured to sense a voltage at the point between the first and second terminals; a switch electrically connected between the first terminal and the second terminal; and a control unit structured to detect a power quality event in the power flowing between the first and second terminals based on the sensed voltage and to control a state of the switch based on the detected power quality event.

A current control device brings, after a target current has been changed to an upper side, a solenoid into a full-on state at a first timing that arrives in a predetermined control transition cycle shorter than an on-off cycle, determines whether an excitation current has become equal to or larger than a full-on threshold larger than the target current, brings the solenoid into a full-off state at a first timing that arrives in a predetermined energization switching cycle shorter than the on-off cycle after the excitation current has become equal to or larger than the full-on threshold, determines whether the excitation current has become equal to or smaller than a full-off threshold smaller than the target current, and causes a transition to a steady control at a first timing that arrives in the control transition cycle after the excitation current has become equal to or smaller than the full-off threshold.

A current control device brings, after a target current has been changed to an upper side, a solenoid into a full-on state at a first timing that arrives in a predetermined control transition cycle shorter than an on-off cycle, determines whether an excitation current has become equal to or larger than a full-on threshold larger than the target current, brings the solenoid into a full-off state at a first timing that arrives in a predetermined energization switching cycle shorter than the on-off cycle after the excitation current has become equal to or larger than the full-on threshold, determines whether the excitation current has become equal to or smaller than a full-off threshold smaller than the target current, and causes a transition to a steady control at a first timing that arrives in the control transition cycle after the excitation current has become equal to or smaller than the full-off threshold.

A flexible circuit breaker includes at least two semiconductor switches, at least one input and at least two outputs. Each of the at least two semiconductor switches can carry a defined current, and each of the at least two semiconductor switches is monitored individually in relation to the current flowing therethrough, the first output is assigned to a first semiconductor switch, where by a selection using a selection device on the flexible circuit breaker, one can select whether the current flowing through a second semiconductor switch is assigned to the second output or the first output.

A flexible circuit breaker includes at least two semiconductor switches, at least one input and at least two outputs. Each of the at least two semiconductor switches can carry a defined current, and each of the at least two semiconductor switches is monitored individually in relation to the current flowing therethrough, the first output is assigned to a first semiconductor switch, where by a selection using a selection device on the flexible circuit breaker, one can select whether the current flowing through a second semiconductor switch is assigned to the second output or the first output.