An overcurrent protection circuit configured to limit an output current flowing through an output transistor includes a sense transistor that provides a sense current proportional to the output current, a sense resistor through which the sense current flows, a current limiting circuit that detects a sense voltage generated by the sense resistor and controls a gate voltage of the output transistor, and a current correction circuit that provides the sense resistor with a corrected sense current added to the sense current based on a difference of voltage between a drain voltage of the output transistor and a drain voltage of the sense transistor.

An overcurrent protection circuit configured to limit an output current flowing through an output transistor includes a sense transistor that provides a sense current proportional to the output current, a sense resistor through which the sense current flows, a current limiting circuit that detects a sense voltage generated by the sense resistor and controls a gate voltage of the output transistor, and a current correction circuit that provides the sense resistor with a corrected sense current added to the sense current based on a difference of voltage between a drain voltage of the output transistor and a drain voltage of the sense transistor.

Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.

Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.

An overcurrent detector with an electric line and a sensor for monitoring an electric current in the line and outputting a measurement signal, and an integral-unit adapted to integrate an interval of consecutive values of the measurement signal and outputting an integrator-signal, the detector comprises a comparator unit for comparing a value of the integrator-signal with a threshold level and outputting a trigger signal, with the detector further comprises a threshold level determination unit, an input being connected to the sensor for receiving an actual measurement signal, and with an output being connected to the comparator unit, proving the comparator unit with the threshold level, and that the threshold level determination unit is adapted to determine the threshold level in dependence on the value of the actual measurement signal.

The present disclosure provides an overcurrent protection circuit, an overcurrent protection method, a clock signal generation circuit and a display device. The overcurrent protection circuit includes N first overcurrent detection circuits, N second overcurrent detection circuits, a first signal generation circuit, a second signal generation circuit, a first level switching circuit, a second level switching circuit and a control circuit. The first signal generation circuit is configured to output a first control signal to the first level switching circuit upon the receipt of a first overcurrent indication signal. The second signal generation circuit is configured to output a second control signal to the second level switching circuit upon the receipt of a second overcurrent indication signal. The control circuit is configured to provide an OFF control signal to an n.sup.th output control module after a predetermined time period upon the receipt of a third control signal and/or a fourth control signal, where N is a positive integer, and n is a positive integer smaller than or equal to N.

An integrated circuit may include a power transistor coupled between a supply pin and an output pin; a current sensing circuit configured to sense a load current passing through the power transistor and to provide a respective current sense signal; a first configuration pin; a current output circuit configured to provide a diagnosis current at a current output pin; a diagnosis pin for receiving a diagnosis request signal; and a control circuit configured to: select a characteristic curve representing a current versus time characteristic dependent on a external circuit connected to the first configuration pin; generate a drive signal for the power transistor dependent on the selected characteristic curve and the current sense signal; and control—dependent on a pulse pattern of the diagnosis request signal—the current output circuit to set the value of the diagnosis current such that it represents the load current or the selected characteristic curve.

An integrated circuit may include a power transistor coupled between a supply pin and an output pin; a current sensing circuit configured to sense a load current passing through the power transistor and to provide a respective current sense signal; a first configuration pin; a current output circuit configured to provide a diagnosis current at a current output pin; a diagnosis pin for receiving a diagnosis request signal; and a control circuit configured to: select a characteristic curve representing a current versus time characteristic dependent on a external circuit connected to the first configuration pin; generate a drive signal for the power transistor dependent on the selected characteristic curve and the current sense signal; and control—dependent on a pulse pattern of the diagnosis request signal—the current output circuit to set the value of the diagnosis current such that it represents the load current or the selected characteristic curve.

A method and apparatus for tertiary control with over-current protection. In one embodiment, the method comprises calculating at least one unconstrained optimal net intertie target for an area of a power network; calculating, for each resource within the area, optimal scheduled current to achieve the at least one unconstrained optimal net intertie target; calculating, using the optimal scheduled currents and a plurality of stress coefficients, net scheduled current for each power line segment within the area; comparing the net scheduled currents to corresponding stress thresholds to identify any stress violations; reducing, when the comparing step identifies one or more stress violations, the optimal scheduled current for one or more resources contributing to the one or more stress violations; and calculating, when the comparing step identifies the one or more stress violations, updated optimal scheduled current for one or more resources not contributing to the one or more stress violations.

A method and apparatus for tertiary control with over-current protection. In one embodiment, the method comprises calculating at least one unconstrained optimal net intertie target for an area of a power network; calculating, for each resource within the area, optimal scheduled current to achieve the at least one unconstrained optimal net intertie target; calculating, using the optimal scheduled currents and a plurality of stress coefficients, net scheduled current for each power line segment within the area; comparing the net scheduled currents to corresponding stress thresholds to identify any stress violations; reducing, when the comparing step identifies one or more stress violations, the optimal scheduled current for one or more resources contributing to the one or more stress violations; and calculating, when the comparing step identifies the one or more stress violations, updated optimal scheduled current for one or more resources not contributing to the one or more stress violations.