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8159801 |
Switched hot swap controller
The invention describes an electric circuit (100), a method and a computer program for hot-swapping an electronic board in a telecommunication system, where the increase in current in the electric...
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8134253 |
Load driving circuit, integrated circuit, DC-DC converter, and load driving method
A load driving circuit (20) according to the present invention, for carrying out PWM control to cause currents of respective light emitting diode lines (3-1 . . . 3-N) connected in parallel, each...
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8116050 |
Semiconductor integrated circuit
To provide a semiconductor integrated circuit including: a detection circuit that detects an occurrence of latch up and can be configured while adopting a layout configuration that suppresses the...
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8116056 |
Low voltage startup timer for a microcontroller-based circuit breaker
A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit breaker to trip in response to a microcontroller fault, including a timing circuit...
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8072726 |
Radiation-tolerant inrush limiter
A radiation-tolerant inrush limiter is provided. The inrush limiter does not incorporate radiation-hardened parts, but instead uses an ordinary (non-hardened) p-channel FET to provide switching...
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8054605 |
Power supply controller
A gate driver 28 performs a normal charging operation for a power MOSFET 14 by driving a charge pump 90 solely, when a low-level control signal S1 (ON signal) is received during a normal state. On...
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8018703 |
Auxiliary device and data transmission method, auxiliary unit and electrical circuit breaker comprising said device
An auxiliary device for remote data transmission having processing means comprising a first input to receive a first data item of a state of the circuit breaker, and at least one command output to...
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7995317 |
Dual voltage hot swap module power control
A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager...
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7907377 |
Arrangement and method for an integrated protection for a power system
For protecting a power system, two or three of over current, thermal and under voltage protection circuits are integrated as one protection circuit but operate independently, and one or more...
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7885049 |
Electrical power switching with efficient switch protection
A transmission delay line is introduced between the switch and the power output side of a power switching system so that sparking of the load is hidden from the switch by the time delay of the...
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7663457 |
Magnetic latch for a voice coil actuator
Magnetically latching and releasing a voice coil actuator for controlling electrical switchgear. The voice coil actuator includes a voice coil magnet disposed on a common longitudinal axis with...
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7652858 |
Protection for permanent magnet motor control circuits
Methods and apparatus are provided for protecting a motor control circuit in a permanent magnet electric motor system. The permanent magnet electric motor system includes a permanent magnet...
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7504743 |
Power supply control device for on-vehicle electrical loads
A power supply control device for on-vehicle electric loads is proposed, the control device being capable of detecting breakages at a plurality of electrical loads, a positive side wiring thereof,...
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7489490 |
Current limiting MOSFET structure for solid state relays
A current-limiting circuit for limiting rising of a current above a predetermined level. The circuit including forward- and reverse-conducting devices, each device including a MOS and a bipolar...
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7446507 |
Overcurrent detection method and detection circuit
In a load-driving apparatus with a FET between a battery and a load, an overcurrent detection circuit has a function generation circuit with a voltage divider circuit and a comparator. The voltage...
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7359171 |
Current limiting circuit and output circuit including the same
A current limiting circuit capable of increasing a range of applicable load values is disclosed. An output circuit (100) may include a current limiting circuit. A current limiting circuit may...
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7330343 |
Current-limiting protection circuit for a power supply
The present invention discloses a current-limiting protection circuit for a power supply, which applies to a power supply that has a maximum power-limiting function, wherein the user will be...
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7327543 |
Method and device for switching a semi-conductor circuit breaker
The invention relates to a method for switching a semi-conductor circuit breaker by means of which the resistance of the breaker gap of the semi-conductor circuit breaker is controlled by a control...
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7259950 |
Load-protection control circuit of power supply
A load-protection control circuit of a power supply, which applies to the power supply that has a maximum power-limiting function. The power supply includes a power transformation circuit which...
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7161782 |
Intelligent fuse box for the power distribution system of a vehicle
The present invention relates to intelligent fuse box (1) for a vehicle's multiplex power distribution system, the fuse box including outputs (3) for driving the vehicle's functional...
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7116160 |
Booster
A booster includes a boosting circuit and a feedback control circuit. The boosting circuit is used to boost an input voltage into a predetermined output voltage; the feedback control circuit...
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6760202 |
Electrical coil module, an electrical coil comprising such modules, and actuation mechanism including such a coil and a circuit breaker comprising such an actuation mechanism
An electrical coil module of planar type manufactured by printed circuit techniques on a generally flat substrate (21) has a first layout (20) of conducing material constituting a first electrical...
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6696708 |
Electrostatic discharge protection apparatus
The present invention reveals an electrostatic discharge protection apparatus including a silicon controlled rectifier, a triggering voltage adapter network and a holding voltage adapter network....
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6624994 |
Apparatus and method for over-current protection of an analog switch
A multiple over current protection circuit for regulating current through an analog switch coupled between a power supply and a load. In a first circuit, a comparator monitors a voltage drop across...
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6594131 |
Over current protection circuit of semiconductor switching device
In an over current protection circuit of a semiconductor switching device, a change in a main current of a semiconductor switching device with respect to a change in the detected voltage of the...
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6331687 |
Control method and device for a switchgear actuator
A current interrupter (4) includes a current interrupting device (4) having at least one movable contact (71); an actuator (8) coupled to the movable contact (71) of the current interrupter (4); a...
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6208175 |
Circuit arrangement for the evaluating a binary signal defined by current threshold values
A circuit arrangement for evaluating a binary signal defined by two current thresholds, particularly the output signal of an active sensor [(1')], comprises a current source [(IQ'_,IQ11,IQ12,IQ13)]...
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6137668 |
Power switch with overload protection
An overload protection circuit for a power switch has a delay element by means of which the voltage which is dropped across the power switch, the supply voltage and a temperature margin are...
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6055149 |
Current limited, thermally protected, power device
A thermally protected power device is disclosed and includes a semiconductor package having at least five pins. One of the pins comprises a ground pin for connecting to a ground connection, and...
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6016245 |
Voltage overshoot protection circuit
A voltage overshoot protection circuit includes an integration circuit configuration. The integration circuit configuration is included in the voltage overshoot protection circuit so as to...
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6011416 |
Switch circuit having excess-current detection function
A microcomputer 4 responds to an instruction signal to turn the load L on or off to control the FET 2 through the drive circuit 5. The microcomputer 4 samples an electric current IL which is...
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5969926 |
Short circuit protection arrangement for an output buffer of an integrated circuit
The current flowing in an output field effect transistor is sensed by a parallel circuit arrangement which derives a sensed current representing the current flowing in the output transistor. The...
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5943205 |
Driver and overload protection circuit
Driver and overload protection circuit for an electrical switch means. Switching control pulses with a minimum edge duration are fed to a two stage comparator circuit having first, lower and...
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5825602 |
Overcurrent trip device
An overcurrent trip device includes a capacitor 13 that stores power for driving a trip electromagnet 7, and a charging current generating means 18 that starts charging the capacitor 13 upon...
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5812353 |
Current limiter for electrical transmission/distribution protection systems
A current limiter arrangement particularly adapted to be positioned at a substation of an electrical power system for limiting the fault current for a predetermined period of time to permit...
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5793596 |
Floating positive circuit breaker
A circuit breaker IC adapted for controlling an external NMOS switch coupled between a supply voltage and a load referenced to ground, with the circuit breaker being isolated from ground. With this...
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5751051 |
Semiconductor device equipped with electrostatic breakdown protection circuit
A semiconductor device has a semiconductor chip which is divided into a plurality of separate regions. In each of these regions, there are provided a plurality of common discharge lines which are...
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5737169 |
Intrinsic element sensing integrated SOA protection for power MOSFET switches
A protective circuit for a power field effect transistor, e.g., a power MOSFET, employs a diode-switched pickup circuit, a threshold detector, and a timer. The pickup circuit includes a resistor...
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5737170 |
Thermal shutdown circuit using a pair of scaled transistors
The base of a thermal shutdown bipolar transistor having a VBE(on) which decreases with increasing temperature is biased with a bias voltage VPTATbias which increases proportionally with increasing...
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5726900 |
Ground detection circuit for a three wire power supply
A three wire power supply circuit is provided comprising a circuit for monitoring the integrity of the ground connection of the power supply circuit. A circuit element is provided in the...
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5687049 |
Method and circuit for protecting power circuits against short circuit and over current faults
A fault protection circuit for protecting IGBT's and other non-latching semiconductor devices in power circuits, for example, power converting/inverting circuits, against phase to phase, phase to...
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5663858 |
Method for fault correction in a power converter circuit arrangement
A method for fault correction in a power converter circuit arrangement. The power converter circuit arrangement has a plurality of switch modules which consist, for their part, of a parallel...
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5636097 |
Protective circuit for semiconductor power device
A circuit is provided for protecting against an increase in collector current for an integrated circuit containing a power switching device. The power device drives an inductive load connected to a...
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5610792 |
Apparatus for controlling the reset of a bus connected transceiver
A method and apparatus for stopping the operation of a failed device and preventing that device from being turned back on is shown, using two thresholds, a first failure threshold is shown when the...
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5585994 |
Battery over-current protection circuit
A first series circuit of a current detector and a first switch is connected in series with a battery, and a second series circuit of a resistor and a second switch is connected in parallel with...
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5568347 |
Load driving circuit with protective circuit
A driving circuit for driving a given load based on a load control signal is provided which includes a power transistor, a protective circuit, and a power transistor control circuit. The power...
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5559500 |
Overcurrent sense circuit
An overcurrent is detected with small power consumption and at a high level of accuracy. A first transistor section 3 comprised of one NPN transistor 31 and a second transistor section 4 comprised...
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5510943 |
Control circuit for power device and level shifting circuit and semiconductor integrated circuit device
In a control circuit for controlling a power transistor included in a power device, the transistor is turned-off when a drop of a control voltage level or overcurrent in the power transistor is...
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5510950 |
Method and circuit for controlling and monitoring a load
A method and circuit is provided which controls and monitors a load through a single I/O pin of a microprocessor. A predriver circuit including a level shifter responds to a driver control signal...
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5485341 |
Power transistor overcurrent protection circuit
An overcurrent protection circuit for a power transistor for generating a main current in response to a gate drive voltage generated by a gate circuit. The overcurrent protection circuit includes a...
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