A short circuit detection apparatus includes a capacitor connected to a high potential side of a semiconductor switching device via a diode and a resistor connected in series, a short circuit determination circuit that detects a terminal voltage of one terminal of the capacitor, and determines that the semiconductor switching device has short-circuited when the terminal voltage is equal to or greater than a threshold voltage, and a voltage control circuit that is provided between another terminal of the capacitor and a low potential side of the semiconductor switching device, switches between a conduction and an interruption of the capacitor and the semiconductor switching device, and applies an offset voltage between the capacitor and the semiconductor switching device when conducting.

The disclosure relates to a protective device for an electronic component connected to an electrical interface, comprising: a detection device for detecting electrical voltage and/or electrical current at the electronic component; a monitoring device; an electronic switch connected in series with the electronic component for disconnecting the electronic component from the electrical interface in the event that an impermissibly high electrical voltage is applied at the electronic component, wherein at least double the nominal voltage is identified as an impermissibly high electrical voltage, wherein in the event that an impermissibly high electrical voltage is no longer detected at the electronic component, the electronic component can be connected to the interface by means of the electronic switch.

A power conversion circuit having a solid-state circuit breaker integrated therein is disclosed. With a disconnect switch between a utility source and the power conversion apparatus described for meeting UL489, the power conversion circuit includes an input connectable to an AC source, a rectifier circuit connected to the input to convert an AC power input to a DC power, and a DC link coupled to the rectifier circuit to receive the DC power therefrom. The rectifier circuit comprises a plurality of phase legs each including thereon an upper switching unit and a lower switching unit, wherein at least one of the upper and lower switching units on each phase leg comprises a bi-directional switching unit that selectively controls current and withstands voltage in both directions, so as to provide a circuit breaking capability that selectively interrupts current flow through the rectifier circuit, while maintaining original power conversion functionalities.

A circuit device includes a regulator, a charge pump circuit, an overvoltage detection circuit, and a control circuit. The regulator regulates a power supply voltage. The charge pump circuit outputs, a gate control voltage, to a gate node of an N-type transistor provided between a power supply node and a load, based on a regulated voltage. The overvoltage detection circuit detects an overvoltage of the regulated voltage. The control circuit controls to stop the charge pump circuit when the overvoltage is detected by the overvoltage detection circuit.

Various embodiments relate to a protection circuit, comprising: a pad configured to input an external voltage from a connector; a first circuit branch connected to the pad and configured to receive a fast ramp-up over voltage at the pad; a second circuit branch connected to the pad and configured to receive a ramp-up over voltage at the pad; a third circuit branch connected to the pad and configured to output an over voltage detection signal when an over voltage is received at the pad, wherein the third circuit branch includes a voltage divider with a variable resistor with a variable voltage node and an enable switch; and a logic circuit including an enabling transistor configured to control the variable resistor and the enable switch.

A system is disclosed which eliminates problems caused by surges of electric energy which is generated on a utility customer's property and which is fed back onto a utility-owned service line by maintaining a minimum utility provided percentage (MUPP) of power being provided onto a customer-owned dead-end service line. Where the electric energy generated by a utility customer is incrementally excluded from the customer-owned dead-end service line through a plurality of contactors which are controlled by a 120 volt command line.

The present disclosure describes a system and method for protecting an electronic device from high voltages that may exceed tolerance limits for circuitry within the electronic device. A protection circuit blocks high voltages from the device components through gating techniques. Such gating techniques may similarly be used to control whether power is received by the electronic components when an error condition is detected by a control unit.

A powered surgical stapling assembly comprising a motor, an end effector, a sensor, a display, and a control circuit is disclosed. The end effector comprises a first jaw and a second jaw movable relative to the first jaw. The end effector is configured to clamp tissue between the first jaw and the second jaw. The sensor is configured to measure a parameter of the tissue clamped within the end effector. The control circuit is configured to monitor the parameter sensed by the sensor and identify when the monitored parameter stabilizes within a stabilization range. The monitored parameter is considered stable when a rate at which the monitored parameter changes falls below a predetermine threshold rate of change. The control circuit is further configured to display to a user when the parameter stabilizes.

Controller (12) of power storage pack (10) communicates with controller (32) of electric moving body (30) in a state where power storage pack (10) is mounted to the electric moving body. Communication wiring (Lc1) connects a node of power line (Lp1) on power source terminal (Tp) side relative to first switch (RYp) and controller (12) of power storage pack (10). Overvoltage protection circuit (19) turns off second switch (SWc) inserted into communication wiring (Lc1) upon detecting an overvoltage of power line (Lp1) during communication between controller (12) of power storage pack (10) and controller (32) of the electric moving body.

A control circuit controls a switching element including a gate and a source corresponding to the gate. The control circuit includes an inductor, a circuit element, and a resistor. The inductor is connected between the gate and the source of the switching element. The circuit element is connected in series to the inductor between the gate and the source. The circuit element allows an electric current to flow therethrough in response to generation of electromotive force in the inductor. The resistor is connected in parallel to the inductor and the circuit element between the gate and the source.