Abstract: A protection circuit for a semiconductor switch has a gate that can be controlled by a gate driver. The protection circuit includes an integrator for detecting a gate charge of the gate and a comparator unit for switching off the semiconductor switch in dependence on the value of the gate charge relative to a reference charge.

Abstract: A load zone of a DC system includes a connection interface for supplying the load zone with electrical energy, an electronic switch arranged between the connection interface and a DC bus, and at least two electrical devices connected in parallel to the DC bus. A voltage sensor measures a voltage across a fuse arranged between the DC bus and a respective electrical device. An evaluation unit identifies a defective device of the at least two electrical devices based on a polarity of the voltage measured by the voltage sensor across the fuse. A DC system with such a load zone and an energy source connected to the connection interface of the load zone, as well as a method for operating such load zone or DC system are also disclosed. A device is identified as being defective when the voltage measured across the fuse exceeds a specified limit value.

Abstract: A terminal protection voltage detector circuit is provided for protecting a terminal block having output terminals in a power supply apparatus. A current detector detects output currents flowing from the power supply apparatus to loads via output terminals, and a first comparator configured to compare a sum of the detected output currents with a predetermined first threshold and output a first comparison result signal when the sum of output currents is larger than or equal to the first threshold. A second comparator configured to compare a maximum value of detected output currents with a predetermined second threshold and output a second comparison result signal when the maximum value is equal to or larger than the second threshold. A current stop circuit stops a current from flowing from the power supply apparatus to the output terminals based on the first or second comparison result signal.

Abstract: A first overcurrent detecting unit to detect whether or not a current supplied from a power source unit to an external device exceeds a first criterion value. A second overcurrent detecting unit to detect whether or not the current supplied from the power source unit to the external device exceeds a second criterion value that is a criterion value higher than the first criterion value, a timer unit in which a time corresponding to a time from a time point at which switching from electric power supplied from the power source unit to the external device in a period, in which a negotiation is performed, to electric power corresponding to a result of the negotiation with the external device is performed to a time before the supply of the electric power becomes stable is set.

Abstract: Detection transistor MNd flows a detection current IdN to a current path CP1n when an output voltage Vo generated in a load terminal PN1 is than a ground voltage GND. A current mirror circuit CMp1 transfers the detection current IdN flowing in the current path CP1n to a current path CP2a. Detecting resistor element Rd1 converts a mirror current I2a flowing in the current path CP2a to a detection voltage Vd1. A control transistor MNc1 is turned on when the converted detection voltage Vd1 is higher than a predetermined value. Then, the output transistor QO is controlled to be off while the control transistor MNc1 is on.

Abstract: The present disclosure provides a coil driving device comprising: an input voltage sensing unit for sensing an input voltage; a switch unit configured to make a switching operation to supply a driving current to a coil; a PWM circuit unit for outputting a pulse width modulation (PWM) signal for the switching operation of the switch unit; an impedance adjustment unit for varying an impedance value such that the PWM signal is adjusted, thereby limiting the driving current; and a control unit for causing the impedance adjustment unit to vary the impedance value on the basis of the input voltage, thereby adjusting at least one of the duty ratio of the PWM signal and the frequency thereof.

Abstract: A fault detection circuit includes a short circuit comparison circuit which has a first input connected to the source of the second NFET, a second input, and an output. The circuit includes an over-current comparison circuit which has a first input connected to the source of the second NFET, a second input, and an output. The circuit includes a voltage divider circuit which has a first terminal connected to first input of the short circuit comparison circuit, a second terminal connected to the first input of the over-current comparison circuit, and a third terminal connected to a ground terminal. The circuit includes a delay circuit which has an input connected to the output of the over-current comparison circuit and has an output.

Abstract: A power stage controller includes: a reference circuit having a first reference input and a reference output, the first reference input adapted to be coupled to an input terminal of a power stage, and the reference circuit configured to adjust a reference voltage at the reference output responsive to whether a voltage at the first reference input is below a threshold; and a comparator having a current sense input, a second reference input, and a comparator output, the current sense input adapted to be coupled to a current terminal of the power stage, the second reference input coupled to the reference output, and the comparator output coupled to a driver input of a driver circuit configured to configured to control a driver output adapted to be coupled to a gate of a transistor of the power stage and responsive to the driver input.

Abstract: Voltage converter having overcurrent protection. In some embodiments, a voltage converter can include a voltage converting circuit configured to receive an input voltage and generate an output voltage. The voltage converter can further include an overcurrent protection circuit coupled to the voltage converting circuit and having a detection unit configured to detect an overcurrent condition associated with the voltage converting circuit. The overcurrent protection circuit can further include a consumption unit configured to selectively consume and thereby reduce a current in a path associated with the voltage converting circuit based on the detection of the overcurrent condition.

Abstract: A switching apparatus electrically connects an electrical load to an energy source and contains a main current path which has a switching unit with a circuit breaker, via which the electrical load is connected to the energy source in a supply mode. An auxiliary current path is connected in parallel with the main current path and in which a first switch is arranged. A disconnection mode is performed in which the circuit breaker is open and the electrical load is connected only to the auxiliary current path to reduce electrical energy stored inside the electrical load. A diagnostic mode is also provided, in which the switching unit is open and the electrical load is connected to the energy source only via the auxiliary current path to supply the electrical load. A control unit for activating the diagnostic mode is also provided.

Abstract: A determination circuit including a detection circuitry, a switch controller, and a determination circuitry. The detection circuitry is configured to detect that an overvoltage has occurred in an electric power supply path. The switch controller is configured to turn off a switch when the detection circuitry has detected that the overvoltage has occurred. The determination circuitry is configured to perform a determination operation including determining whether the overvoltage that has occurred is attributed to an electric power conversion circuit or a load, on a basis of one of or both a first voltage of a first path and a second voltage of a second path that are in a period in which the switch is off, the first path coupling the switch and the electric power conversion circuit in the electric power supply path, the second path coupling the switch and the load in the electric power supply path.

Abstract: An eFuse for use in high voltage applications is disclosed. In one embodiment, an apparatus includes a solid-state switch having source and drain terminals connected to switch a load current from a high voltage source through a high voltage load. The apparatus also includes a sense circuit that senses a voltage between the switch source and drain terminals and turns off the switch when the voltage exceeds a selected voltage level.

Abstract: To suppress a malfunction of an overcurrent protection circuit caused by rise of a sense voltage in a mirror period immediately after turn-off of a semiconductor switching element. A semiconductor device includes: a semiconductor switching element; a sense resistor; an overcurrent protection circuit which outputs a control signal for controlling on-drive and off-drive of the semiconductor switching element based on whether a sense voltage exceeds a threshold value; and a diode which clamps the sense voltage. When the sense voltage exceeds the threshold value, the overcurrent protection circuit outputs a signal for off-driving the semiconductor switching element as the control signal.

Abstract: A region of a portion directly beneath an OC pad is a sensing effective region where unit cells of a current sensing portion are disposed. Directly beneath the OC pad, a region surrounding a periphery of the sensing effective region is a sensing non-operating region in which no unit cells of the current sensing portion are disposed. In the sensing non-operating region, a first p-type base region that floats is provided in a surface region of the front surface of the semiconductor substrate and is separated from a second p-type base region of the sensing effective region by an n?-type region that surrounds a periphery of the sensing effective region. The n?-type region has a surface area that is greater than that of the sensing effective region. A distance between the first and the second p-type base regions is at least 0.1 ?m and is as small as possible.

Abstract: A solid state power controller includes at least one solid state switching device connected to at least one load to be supplied with power from a power feed line and configured to selectively connect the respective load to the power feed line or to disconnect the respective load from the power feed line; at least one SSPC control circuit configured to supply a control voltage to a control terminal of the solid state switching device; and a discrete output circuit electrically that supplies a discrete output signal indicative of the state of the control terminal of the solid state switching device and the discrete output circuit detects an overcurrent in a circuit connected to the discrete output terminal and to limit an output current and/or interrupt supply of the discrete output signal in case an overcurrent is detected.

Abstract: A drive control apparatus for a switching element drives a switching element including a sense element, and includes a drive circuit that provides a gate driving signal to the switching element, a transient characteristic absorbing circuit that absorbs a transient characteristic of the sense element when the switching element is turned on, and a determination circuit that determines an overcurrent or a short-circuit state of the switching element from an output of the sense element.

Abstract: Gate-protection circuitry protects a transistor, such as a MOSFET, from large gate-to-source voltage differentials that can permanently damage the transistor's gate-oxide layer. A source-voltage detector selectively enables the gate-protection circuitry based on a source voltage of the transistor. The gate-protection circuit is implemented without any Zener diodes. The transistor may be a load switch that is selectively controlled to apply a supply voltage to a load.

Abstract: A startup circuit includes an enhancement mode transistor with a drain coupled to a startup circuit input, a source coupled to a first node, and a gate coupled to a second node. The startup circuit includes a current limiting circuit that controls a current path between the second node and a startup circuit output node based on a current sense voltage signal representing a current through the enhancement mode transistor, and a voltage regulation circuit controls a voltage of the second node to regulate a startup circuit output voltage of the startup circuit output node.

Abstract: A system for managing electronic trading, comprises an interface application including a mapping module that defines a plurality of controller signal relationships. Each controller signal relationship associates one or more of a plurality of game controller signals with one of a plurality of trading system commands associated with the electronic trading of financial instruments. The interface application receives a plurality of game controller signals generated by a game controller, and determines, based on the controller signal relationships, that one or more of the plurality of received game controller signals are erroneous. The interface application causes the communication of a command to lock the game controller based on the determination of the one or more erroneous game controller signals.

Abstract: A testing device for testing a control unit of a switching device of an electrical switchgear installation. The testing device has a signal input, and to which a controlled current sink is provided, which is connected to the signal input. The controlled current sink shunts an input current from the signal input in order to provide a dynamically adjustable input impedance. A method for testing a control unit of a switching device of a switchgear installation, includes the testing device having a signal input, to which an input voltage may be applied. In the testing device, a controlled current sink shuts an input current from the signal input and thus provides a dynamically adjustable input impedance.

Abstract: A detection circuit and a switch module using the same is provided. The detection circuit includes a comparison circuit. A first input end of the comparison circuit is coupled to an output end of a power supply, and a second input end of the comparison circuit is coupled to an input end of a switch circuit. The comparison circuit compares voltage information or current information obtained via its first input end and it second input end, and accordingly generates an output signal. The output signal indicates whether there is an external resistor between the power supply and the switch circuit. According to the output signal, the switch circuit determines how a current provided by the power supply is to be detected, and accordingly continues or stops providing the current to a load.

Abstract: An electrical switch for providing power from a power source to a component may include a voltage supervisor having an input and an output, a voltage divider, electrically coupled between the input of the voltage supervisor and ground, an RC filter electrically coupled to the output of the voltage supervisor, and a field-effect transistor having a first terminal coupled to the RC filter and a second terminal coupled to an output of the switch, the output configured to be electrically coupled to the component. A switch may additionally or alternatively include a light source electrically that emits light when power is provided from the input of the switch to the component, the light source arranged proximate a fuse so as to illuminate the fuse.

Abstract: A method tests a switching state of a circuit breaker device (10) for establishing/breaking a connection of two circuit areas (12, 14), especially in a vehicle. The circuit breaker device includes at least one MOSFET switching element (20) with a source terminal (22) connected with one of the circuit areas (12, 14) and a drain terminal (24) connected with another of the circuit areas (12, 14). A gate driver (26) is associated with the switching element (20) for switching into a connection switching state. The method includes applying a testing voltage pulse to the drain terminal, detecting a voltage drop between the drain terminal and the source terminal, comparing the voltage drop detected with a voltage reference or/and with a time reference, and determining, based on the comparison, an actual switching state of the at least one MOSFET switching element (20) being subjected to the switching state test.

Abstract: A current detection device for a power semiconductor element includes an operational amplifier that fixes an emitter terminal of a sense IGBT to a voltage equal to or smaller than 1 volt of a reference voltage supply, and a current-voltage converter configured to flow in a resistor a current that is greater than and proportional to a current that flows into the operational amplifier from the sense IGBT. The current-voltage converter includes an NMOS transistor that operates with reference to an electric potential of a ground and a resistor provided at a high side of the NMOS transistor, in order to operate from the electric potential of the ground.

Abstract: A PTC device comprises a current and temperature sensing element, a first insulating layer, a second insulating layer, a first electrode layer and a second electrode layer. The current and temperature sensing device is a laminated structure comprising a first conductive layer, a second conductive layer and a PTC material layer. The first and second conductive layers are disposed on first and second surfaces of the PTC material layer, respectively. The second surface is opposite to the first surface. The first and second insulating layers are disposed on the first and second conductive layers, respectively. The first electrode layer is disposed on the first insulating layer and electrically connects to the first conductive layer. The second electrode layer is disposed on the second insulating layer and electrically connects to the second conductive layer. Corners of the current and temperature sensing device are provided with insulating members.

Abstract: There is provided an overcurrent protection circuit having a sense transistor through which a first sense current proportional to an output current of an output transistor flows, a voltage-current converting circuit connected between an input terminal of the output transistor and an output terminal thereof, and configured to output a first current, a first current-voltage converting circuit configured to output a first voltage proportional to the first current, a voltage detection circuit configured to detect the first voltage and to output a second sense current based on the output current of the output transistor, a second current-voltage converting circuit through which the first sense current and the second sense current flow, and a current limiting circuit configured to limit the output current of the output transistor based on a second voltage supplied from the second current-voltage converting circuit.

Abstract: Control device having at least one electrical switching device, configured to provide electrical power to an associated load and arranged between a supply connection and a load connection and having at least one processing device, electrically connected with an input interface, with the at least one electrical switching device and with the load connection wherein it is provided that between the supply connection and the load connection parallel to the switching device an electrical resistor means is arranged, in order that when the switching device is open it forms a voltage divider with the load and allows a monitoring of the load connection independently of the switching state of the switching device.

Abstract: A high side output driver includes a controller capable of operating the high side output driver in a charging mode by outputting a pulse width modulated voltage signal. The on time of the pulse width modulated voltage signal is less than a minimum value of a blank time range of the high side output driver.

Abstract: The subject matter of the invention concerns a varistor with an isolating arrester, wherein the isolating arrester can interrupt the flow of current through the varistor in the event of a fault, wherein the isolating arrester has a terminal contact that establishes an electrical contact to a first contact of the varistor, wherein the electrical contact is protected by a thermally softenable holding device, wherein the isolating arrester also has a detachment means which is biased by means of an energy accumulator and which, in the event of a fault, if the thermally softenable holding device softens, mechanically disconnects the terminal contact from the first contact of the varistor, and wherein the detachment means is embodied so as to be resistive in order to limit the current through the varistor and prevent electrical arcs.

Abstract: A switch is disclosed, in particular a power switch, for low voltages. The switch includes mechanically separable contact elements, in abutment when the switch is closed and via which a current to be monitored flows through the switch, an electronic trigger unit, which triggers a respective contact mechanics unit if a current condition is satisfied. In the event of triggering, the contacts are separated and the switch is switched on via the contact mechanics unit. A supply unit is included to extract a first electric energy from the current flowing through the switch to supply the trigger unit with energy. To guarantee energy supply even when switching to a short-circuit, the contact mechanics unit is coupled to a conversion unit, which converts a portion of the mechanical energy to be provided during switching-on into a second electric energy that supplies the trigger unit with electric energy during switching-on.

Abstract: An electronic circuit includes an electronic switch having a control terminal and a load path and also includes a monitoring circuit comprising a switched-capacitor circuit with at least one capacitive storage element. The switched-capacitor circuit coupled to the load path of the electronic switch. The circuit can be operated by using the monitoring circuit to evaluate a load voltage of the electronic switch and to generate a failure signal dependent on the evaluation and providing a drive signal at the control terminal of the electronic switch dependent on the failure signal.

Abstract: A switching power supply comprises one or more power supply stages configured to receive power from an input power source and to generate an output voltage for powering a load by alternately opening and closing a set of switches. An output current sensor is configured to monitor a level of an output current of the switching power supply. The opening and closing of the set of switches is controlled so as to maintain the output voltage at a desired level when the level of the output current is below the threshold and so as to limit the output current when the level of the output current exceeds the threshold.

Abstract: In one embodiment, an amplifier is configured to include a pre-drive circuit that forms an estimated value of an output signal of the amplifier and forces the output to the estimated value before the amplifier forms the output signal.

Abstract: A fully integrated circuit configuration that can be used to control the power path of a pair of PMOS load switches is described. The circuit also integrates a programmable slew rate for the second PMOS load switch in order to control the power path from the input system voltage (battery or power supply) or from a backup source of power. The integrated circuit configuration also contains a charge pump circuit which can be used to charge the backup source of power to a voltage that is greater than the input voltage.

Abstract: An overcurrent detection apparatus includes a sense emitter current detection unit that detects a sense emitter current output from a sense emitter of an IGBT as a sense emitter voltage, and a comparison unit that detects an overcurrent by comparing the sense emitter voltage detected by the sense emitter current detection unit with a threshold voltage. The overcurrent detection apparatus also includes a correction current detection unit that detects a correction current corresponding to a current flowing between a gate and the sense emitter of the IGBT as a corrected voltage; and a voltage correction unit that calculates a sense emitter corrected voltage by subtracting the correction voltage detected by the corrected current detection unit from the sense emitter voltage detected by the sense emitter current detection unit, and supplies the sense emitter corrected voltage to the comparison unit.

Abstract: A control circuit for a DC-DC converter includes: an output control circuit configured to control an output voltage of a DC-DC converter according to a reference voltage; a reference control circuit configured to control the reference voltage according to an open-circuit voltage of an external power supply coupled to the DC-DC converter; a limiting circuit configured to limit a current flowing from DC-DC converter to an external load; and a stopping control circuit configured to stop operation of the limiting circuit until the reference voltage reaches a given value.

Abstract: A power circuit including a current-limiting semi-conductor switch and a control system connected to the current-limiting semi-conductor switch and configured to bias the semi-conductor switch into conduction and into cut-off. The control system further comprises a short-circuit protection circuit configured to detect and evaluate the voltage drop via the current-limiting semi-conductor switch.

Abstract: An electronic circuit includes an electronic switch having a control terminal and a load path. A monitoring circuit includes a switched-capacitor circuit with a capacitive storage element. The switched-capacitor circuit is coupled to the load path of the electronic switch. The monitoring circuit is operable to evaluate a load voltage of the electronic switch and to generate a failure signal dependent on the evaluation. A drive circuit is operable to provide a drive signal at the control terminal of the electronic switch dependent on the failure signal.

Abstract: A current limiting circuit includes a limit current setting unit that sets a value of a limit current for limiting an output current from a driver circuit connected to the current limiting circuit, the limit current value including a first acceptable value and a second acceptable value larger than the first acceptable value; an excess current detecting unit that detects when the output current from the driver circuit exceeds the first acceptable value; and a limit current adjusting unit that replaces the first acceptable value with the second acceptable value in a period when the output current detected by the excess current detecting unit exceeds the first acceptable value.

Abstract: A solid state power controller for an aircraft. The solid state power controller includes a solid state switching device for activating an electrical power output bus, a control unit for controlling the solid state switching device, and a current sensing circuit for monitoring current flowing in the electrical power output bus. The current sensing circuit includes a sensing fuse.

Abstract: A system for supplying direct current and DC voltage is provided. The system comprise a first supply branch having a first DC voltage source and a power field-effect transistor of a current limiter which are connected in series, and a second supply branch having a second DC voltage source. The power transistor has a current/voltage characteristic with a first inverse polarization area without current limitation, and a second conduction area with current limitation based on a current threshold. The power field-effect transistor is connected to the first voltage source with an inverse polarization when the voltage source of the first branch is operating normally.

Abstract: A ground protection circuit (36) includes: a sensing resistor (R3), disposed on a path which a charging current (IB) of a bootstrap circuit (D1, C1) flows through; a comparator (361), for comparing a voltage (?V) between two ends of the sensing resistor (R3) and a specific threshold voltage (Vth) to generate a ground protection signal (S1); and a logic gate (362), for enabling the ground protection signal (S1) to be invalid in a normal charging operation of the bootstrap circuit.

Abstract: A semiconductor device includes a sense resistor that converts a sense current flowing through a sense terminal of a switching element to a voltage (sense voltage), and an overcurrent protection circuit that performs a protection operation for the switching element when the sense voltage exceeds a threshold. The overcurrent protection circuit can switch the threshold to a first reference voltage, or to a second reference voltage which is lower than the first reference voltage. The overcurrent protection circuit sets the threshold to the second reference voltage at the time of the switching element being in a steady state, and sets the threshold to the first reference voltage during a mirror period immediately after turning-on of the switching element.

Abstract: A power module includes a current sensing circuit in which a transistor includes an emitter connected to a sense emitter of a current sense element of an IGBT and a base connected to ground, a current sensing resistor including one end thereof connected to a collector of the transistor and the other end thereof connected to a common connection portion. The power module detects, as a current sensing voltage, a potential difference generated by the current sensing resistor based on the common connection portion as a reference, compares the current sensing voltage with a predetermined threshold voltage, and determines whether or not an overcurrent flows through the IGBT according to a magnitude relation therebetween.

Abstract: A self-adaptive surge-proof circuit is used in a switching power supply device. The switching power supply device includes an AC input, a filter-rectifier circuit connected to the AC input, and a power converter circuit connected to the filter-rectifier circuit. The self-adaptive surge-proof circuit includes a surge suppression unit connected between the filter-rectifier circuit and the power converter circuit, a switching unit connected in parallel with the surge suppression unit for adjusting an input impedance of the switching power supply device, a sampling unit connected to the filter-rectifier circuit for collecting a surge signal from the filter-rectifier circuit, and a drive-controlling circuit connected to the sampling unit for generating a driving signal for controlling on and off of the switching unit according to the surge signal.

Abstract: An electronic fuse system includes plural current paths, each operable to be coupled between a power source and a load, and each including a switching element and a current sensing resistor in series with the path such that the path passes current when the switching element is turned on and does not pass current when the switching element is turned off. A controller has two sense inputs and a control output. The control output is coupled to the switching elements in each of the plural current paths and is operable to turn them all on or off simultaneously responsive at least in part to the sense inputs. A summing resistor is connected across the two sense inputs, and coupling circuitry is operable to couple voltages appearing across the current sensing resistors to the summing resistor.

Abstract: Embodiments of the present invention relate to the field of electronic technologies, and provide a current-limiting circuit and apparatus to reduce costs of the current-limiting circuit and an occupied PCB board area. The circuit comprises a detecting resistor, a current-limiting resistor, a precise current unit, a power metal oxide MOS transistor, an operational amplifier OP and an input voltage end.

Abstract: A dc breaker is connected in a main current path between a first dc circuit and a second dc circuit. The dc breaker has a primary current path connected to the main current path. A mechanical interrupter switch and an electronic breaker switch are connected in series in the primary current path. A secondary current path is provided in parallel with the primary current path. A capacitor is arranged in the secondary current path so as to be connected in parallel with the series-connected switches of the primary current path.

Abstract: A fan with a protection circuit includes a connector, a fan operation circuit, and a protection circuit. The protection circuit includes a first resistor, a controller, and an electronic switch. The controller controls the electronic switch to be turned off when a current flowing through the first resistor is greater than a preset current. The controller controls the electronic switch to be turned on when the current flowing through the first resistor is less than the preset current, then the fan resumes normal working.

Abstract: A DC distribution board comprises, therein as internal devices, a circuit breaker 5 provided along each of branch lines branched from main wires of a direct-current power supply, and a controller 6 for controlling switching of the breaker 5. The circuit breaker 5 comprises: power connecting terminals t1, t2 connected to the main wires; load connecting terminals t3, t4 connected with wires from a load; a semiconductor switch device 57 provided along an electrical circuit between the terminals t1, t2 and the terminals t3, t4; a current sensing resistor 56 for detecting an electric current through the electrical circuit; and a arithmetic circuit 60 for turning the device 57 on or off according to an on/off control signal from the controller 6, and coercively turning the device 57 off when a current value obtained from a voltage across the resistor 56 exceeds a set current.