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7636227 |
Noise immune over current protection with inherent current limiting for switching power converter
A circuit for providing over-current protection, the circuit including a gate driver circuit for controlling a bridge circuit including a half bridge stage having high and low switches. The circuit...
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7630186 |
Current protection apparatus and method
A current protection apparatus ( 200 ) and current protection method ( 1000 ) that may include programmable current protection characteristics has been disclosed. A current protection apparatus (...
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7630185 |
Electronic circuit breaker
An electronic circuit breaker includes an input for connection to a power-supply and an output for connection to a load. Connected in circuit between the input and the output are a switch, a relay,...
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7626795 |
Overload protection for controllable current consumers
A device and a method for protecting a controllable current consumer is provided wherein the current through the current consumer is detected and the control signal is altered when exceeding a...
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7626796 |
Power distribution unit with two pole circuit breaker
A power distribution unit includes a two pole circuit breaker having a first pole electrically coupled to an x-phase circuit portion of the power distribution unit and having a second pole...
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7622905 |
Voltage regulator of a DC power supply
A voltage regulator for regulating a voltage of a direct current source is disclosed. The voltage regulator includes a current-limiting circuit and a power-storing circuit. The current-limiting...
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7616421 |
Electrical interface system
An interface system may be used to connect an electrical device to an electrical bus. The interface system may include a first end and a second end in electrical communication with the first end....
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7609499 |
Active current limiting circuit
A current controller for a device is provided. The current controller includes power and ground inputs for connecting to a source of energization, and power and ground outputs for connecting to the...
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7602205 |
Electromigration tester for high capacity and high current
An electronic device under test (DUT) may be incorporated into a circuit having a voltage limiter connected in parallel with the DUT. The circuit includes a controlled current source having an...
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7586724 |
Adaptive current limiter for wireless modem
Method and apparatus for preventing current overdraw by a wireless modem sinking current from a host power supply of a host device (e.g. laptop computer or personal digital assistant (PDA)). The...
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7586727 |
Inrush current limiting switching circuit for power supply
An inrush current limiting power supply switching circuit is disclosed including a first switch through which an electrical load, having a capacitor, and a direct current power supply are...
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7580234 |
Single threshold current surge limiter circuit with disable function
A circuit which limits current to a first value until a predetermined time has elapsed, then permits the current to rise to a second, acceptable value. The current limiting can be carried out...
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7576525 |
Supply power control with soft start
Charge storage devices (e.g., batteries or supercapacitors) need to be charged from time to time. In an apparatus, to protect a charge storage device as well as the supply used to charge it, the...
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7573689 |
Overcurrent detecting circuit and regulator having the same
An overcurrent detection circuit that minimizes fluctuations in the overcurrent detection level when the input supply voltage or temperature fluctuates includes a monitor transistor having a...
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7561397 |
Limited current circuit for electro-luminescent lamp inverter
A current limiting device includes a constant current source circuit constructed and arranged to be connected to a direct current input voltage source and to regulate electrical current and a...
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7558039 |
Method, apparatus, and computer program product for detecting excess current flow in a pluggable component
Detecting excess current flow in a pluggable component is performed by completing a first current supply path between a power source and a pluggable component, and subsequently completing a second...
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7554783 |
High-power foldback mechanism in system for providing power over communication link
A novel system for providing power over the Ethernet includes a current limit circuit for preventing an output current from exceeding a current threshold set at a prescribed level, and a foldback...
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7554779 |
Distributed power supply circuit
A distributed power supply circuit supplying common power to multiple packages in an apparatus so that a primary voltage of the common power is converted into a secondary voltage in a voltage...
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7551416 |
Power supply equipped with an independent overload protection mechanism
A power supply equipped with an independent overload protection mechanism includes a control circuit and a transformation circuit that form multiple sets of combination circuits for transforming AC...
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7538519 |
Information handling system with battery protected from non-permanent failures
In a method and system for protecting a battery being charged by an electrical device, a current flowing through a cell stack of the battery is measured. If the measured current is greater than a...
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7535691 |
Method and apparatus for an in-rush current limiting circuit
An in-rush current limiting circuit is disclosed. An apparatus according to aspects of the present invention includes a power switch having a first, second and third terminals. A capacitor having a...
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7535690 |
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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7532448 |
Current limit detector
Devices, such as mobile devices, may be exposed, to short circuit and output overload events. To protect against such events, mobile devices typically include current limit circuits. Some current...
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7522398 |
Method and apparatus for overcurrent protection in DC-DC power converters
A controller and method for a switched-mode power converter adaptively provides overcurrent protection by detecting a current in the power converter exceeding a current limit during substantially a...
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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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7482762 |
Discharge lamp ballast with detection of abnormal discharge outside the arc tube
A discharge lamp ballast is designed to limit or interrupt its AC output power to the discharge lamp upon occurrence of an abnormal discharge outside of an arc tube. A detector is included to...
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7480126 |
Protection and voltage monitoring circuit
A protection and voltage monitoring circuit that may provide the functionality of a diode without the typical large voltage drop and power dissipation. The protection and voltage monitoring circuit...
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7471047 |
Plasma television set
At a primary power-supply board 40, a V sus power supply and a V add power supply of prescribed voltages are derived and outputted to a plasma display panel 11. Secondary power supplies V...
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7468874 |
Protection circuit for digital power module
A sensorless protection circuit comprises a detection module. The detection module receives a reference voltage signal and receives a load voltage signal from a MOSFET. The detection module...
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7457092 |
Current limited bilateral MOSFET switch with reduced switch resistance and lower manufacturing cost
A circuit and method for controlling a MOSFET based switch that includes two back-to-back FET to block current flow in the OFF state irrespective of the polarity of the voltage differential across...
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7436643 |
Protection circuit
A protection circuit (P) for protecting a load (L) against overcurrents, and including input terminals (IN 1 ,IN 2 ) coupled to first and second power supply terminals of a power supply, output...
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7433166 |
Constant current generator
A constant current generator connected between first and second terminals includes a gate turn-off thyristor in series with a resistor; a current limiting component connected between the anode gate...
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7428133 |
Protection device of a surge protector
The present invention relates to an protection device of a surge protector, which comprises: a first fuse; a resistor; a switching circuit; a second fuse; and a surge protector; thereby the...
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7421353 |
Digital integration method
This invention is a simplified method of digitally monitoring energy in a system. The power is measured at fixed periods, and the measurements summed in a register or accumulator. When the sum in...
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7414867 |
Power conversion device
An insulated gate bipolar transistor and a protective circuit are incorporated. The protective circuit has first and second Zener diodes connected in series in directions opposite to each other...
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7408755 |
Advanced inrush/transient current limit and overload/short circuit protection method and apparatus for DC voltage power supply
The present invention provides a single circuit that may have multiple protection functions for a DC voltage power supply. The present invention may include separate circuit modules that are...
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7403365 |
Over-current detection circuit and method for power-supply device
An over-current detection circuit using the ON-voltage of a main MOSFET is provided, which is resistant to process variations of a main MOSFET and is not easily influenced by switching noise....
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7397644 |
Power supply device and electric circuit
An FET for malfunction check is connected between the gate and source of an FET for power-source output control, which is connected in series in a power output line from a battery used as a power...
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7369385 |
Overload limiting circuit
An overload current limiting circuit includes an output control circuit responsive to a logic input signal for generating a control signal for driving an output device to produce at an output...
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7369386 |
Overcurrent protection for solid state switching system
Current sensing resistors are connected directly to output terminals of MOSFETs forming the series switching stage of a PWM sinewave dimmer. An analog sensed current signal is coupled through an...
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7362557 |
Method, apparatus and article for bi-directional DC/DC power conversion
A controller implements a state machine for operating the bi-directional power converter with a flexible load pattern while maintaining a thermal condition of the power converter within acceptable...
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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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7359169 |
Circuit for protecting integrated circuits against electrostatic discharges
A circuit is described that protects an integrated circuit from electrostatic discharges or electrical over-stress. The circuit arrangement has first and second protective elements connected in...
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7339775 |
Overcurrent protection circuit and DC power supply
An overcurrent protection circuit and DC power supply that are subtly affected by process and device differences, have small input and output voltage drops, and set maximum and short-circuit...
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7339773 |
Method for driving a semiconductor switch and circuit configuration with a semiconductor switch
A method for driving a semiconductor switch with load current limiting and thermal protection whose maximum load current is limited and which switches off when a predetermined upper temperature is...
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7330063 |
Circuit arrangement for limiting a ringing current
A circuit arrangement for bidirectional current limiting comprises a first transistor, a second transistor, a first resistor, a first zener diode and a second zener diode. The first transistor...
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7327544 |
Battery protection device
A battery protection structure is described. The structure provides battery overcharging protection while allowing for minimal battery voltage drop during normal battery operation. One resistance...
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7324316 |
Hot-swap circuit system for fan tray module
A hot-swap circuit system for fan tray module includes a soft-start circuit module in charge of the power start of the fan tray module hot-plugged into an application system. The soft-start circuit...
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7323854 |
Zero cancellation in multiloop regulator control scheme
Control loops in a voltage regulator can be stabilized using minimal silicon area. A current limit signal, generated by a current limit control loop in the voltage regulator, can be divided to...
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7317604 |
Over-current protection device
An over-current protection device is constituted of a current detection unit for detecting a current from a power-supply source to a load having a magnetism detection element with a magnetic...
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