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| Number | Title | Issue Date |
| 8189314 | Current in-rush limiting circuit using switchable current limiting arrangement An apparatus includes first and second input terminals, a conversion circuit, a current limiting resistive device, a triac and a second winding. The first and second input terminals are configured to be connected to a source of input power. The conversion circuit is... | 05/29/2012 |
| 8184419 | Power supply with current limiting circuits A power supply (200) is provided having a plurality of independent current limiting circuits. A first current limiting circuit (6) provides protection against a short circuit or other extraneous load conditions, while a second current limiting circuit,... | 05/22/2012 |
| 8184420 | Control module and fault current limiter with function of opening and closing The present disclosure relates to a fault current limiter, comprising: a trigger device dividing a fault current to a path on which a normal current flows and to a path on which the fault current flows when the fault current is generated; a first switch connected in... | 05/22/2012 |
| 8179651 | Overload protection for a circuit arrangement having a transistor In an embodiment, a drive circuit for a transistor includes an output for providing a drive signal to the transistor. The drive circuit monitors the transistor for an occurrence of an overload, changes into an overload protection state in which the drive circuit dri... | 05/15/2012 |
| 8164874 | Overvoltage protection device for an electrical circuit An overvoltage protection device, including: an input configured to be connected to a power supply mains; an output configured to be connected to an electronic system to be protected; two bidirectional field-effect semiconductor transistors of normally-on type, conn... | 04/24/2012 |
| 8116055 | Methods and apparatuses for performing common mode pulse compensation in an opto-isolator In an opto-isolator, a common mode pulse compensation circuit is provided that senses when a common mode pulse event occurs and that adds current to the LED drive current to compensate for a decrease in the LED drive current caused by the occurrence of the event. Th... | 02/14/2012 |
| 8111494 | Memristor-protection integrated circuit and method for protection of a memristor during switching A memristor-protection integrated circuit. The memristor-protection integrated circuit includes a first current-bias circuit, a second current-bias circuit, an inverter, and a current limiter. The first and second current-bias circuits are configured to be coupled t... | 02/07/2012 |
| 8089743 | Voltage regulator having active foldback current limiting circuit The present invention mainly relates to a voltage regulator, comprising: a P typed power MOS; a feedback circuit; a differential amplifier; a protecting circuit having a N-typed transistor current mirror; and an active foldback current limiting circuit rather than u... | 01/03/2012 |
| 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 functionality. ... | 12/06/2011 |
| 8054604 | Device and method of reducing inrush current This disclosure provides a method and apparatus for reducing an inrush current inflowing from an external power source during an initial transient state. The method may include generating a first signal based on a level of internal voltage. The first signal may line... | 11/08/2011 |
| 8045310 | Semiconductor device with overcurrent protection A semiconductor device with an over-current detection feature is disclosed. According to an example of the invention the device includes: a semiconductor chip including a load current path that conducts a load current in response to an input signal activating the lo... | 10/25/2011 |
| 8040651 | Method and circuit for protecting a MOSFET A method and a corresponding circuit protect a power MOSFET from overload when switching the MOSFET off. The current through the MOSFET is compared to a reference signal depending on the time since switching the MOSFET on. ... | 10/18/2011 |
| 8040652 | Programmable power distribution switches with two-level current sensing Programmable power distribution switches with two-level current sensing are disclosed. In a particular example, a power distribution switch includes a programmable output device having a resistance based on a programmed maximum output current and generates an output... | 10/18/2011 |
| 8035943 | Protection circuit apparatus A protection circuit apparatus comprises a retriggerable fuse having an awakened state and a sleep state. The retriggerable fuse has an input and an output and is arranged, when in the awakened state, to selectively prevent a load current from flowing from the input... | 10/11/2011 |
| 8031453 | Industrial process field device with improved battery assembly An industrial process field device is provided. The device includes wireless process field device electronics disposed within the industrial process field device and at least one battery cell disposed within the industrial process field device and operably coupled t... | 10/04/2011 |
| 8004809 | Semiconductor integrated circuit device having overcurrent limitation circuit A semiconductor integrated circuit device includes an output transistor, an overcurrent detection circuit and overcurrent limitation circuit. The overcurrent detection circuit includes a first transistor detecting an overcurrent of the output transistor. The overcur... | 08/23/2011 |
| 7974060 | Overcurrent limitation and output short-circuit protection circuit, voltage regulator using overcurrent limitation and output short-circuit protection circuit, and electronic equipment A disclosed overcurrent protection and output short-circuit protection circuit has a proportional output current generation unit and a first current voltage conversion unit provided in series between a first power supply terminal and an output terminal. Furthermore,... | 07/05/2011 |
| 7969703 | Overcurrent protection circuit and voltage regulator incorporating same An overcurrent protection circuit includes a current limiter and a status detector, and a voltage regulator includes an output transistor. The output transistor is configured to regulate a voltage input to an input terminal to output a given constant voltage from an... | 06/28/2011 |
| 7965484 | Device for protecting a speed controller against overcurrent The invention relates to a speed controller comprising: a rectifier module (12) for generating a direct voltage on a power bus (10, 11) from an alternating voltage available on an electrical power-supply network (A); | 06/21/2011 |
| 7957116 | System and method for detection of multiple current limits 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 limit circuits may involve user programmable function. User programmabl... | 06/07/2011 |
| 7948729 | Method and circuit for over-current protection In one embodiment the present invention includes an over-current protection method. The method comprises generating a switching signal, starting and stopping a timer, sensing a current through a switch, comparing a response time to a reference time, and generating a... | 05/24/2011 |
| 7907379 | Overload protection for a circuit arrangement having a transistor A drive circuit for a transistor and a method for driving a transistor are described. ... | 03/15/2011 |
| 7898784 | Protection circuit with variable current level limits A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a c... | 03/01/2011 |
| 7881031 | Overcurrent protection circuit when setting current using a package control pin An overcurrent protection circuit for a current setting circuit is disclosed herein that prevents a user-selectable current from exceeding a current limit when an incorrect current selecting component (or current selecting circuit) is connected to an external contro... | 02/01/2011 |
| 7872842 | Overcurrent protection device for a power supply device and related power supply device An overcurrent protection device for a power supply device includes a receiving end for receiving a current sensing signal, a compensating current unit coupled to the receiving end for compensating the current sensing signal in order to generate a current sense comp... | 01/18/2011 |
| 7859812 | Power IC with an over-current protection circuit and method thereof A power IC with an over-current protection receives an input voltage and converts the input voltage into an output voltage to a load. The present invention controls a power transistor to provide an output current to the load, and uses the output control unit to cont... | 12/28/2010 |
| 7835128 | Systems and methods for distributed series compensation of power lines using passive devices Systems and methods for implementing line overload control via providing distributed series impedance are disclosed. One system, amongst others, comprises at least one distributed series reactor (DSR). Each DSR comprises a single turn transformer (SST) comprising tw... | 11/16/2010 |
| 7813098 | 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 first terminal and a second terminal is also included. The second te... | 10/12/2010 |
| 7808759 | Methods and apparatuses for performing common mode pulse compensation in an opto-isolator In an opto-isolator, common mode pulses that occur are compensated for by either adding current to the electrical-to-optical converter (EOC) drive current to compensate for a decrease in the EOC drive current caused by the occurrence of a common mode pulse or by pul... | 10/05/2010 |
| 7791854 | Current limit protection apparatus and method for current limit protection A current limit protection apparatus and a method for current limit protection are provided. The current limit protection apparatus includes a MOS transistor, a current detecting unit, and a current limit circuit. Two source/drain of the MOS transistor are used for ... | 09/07/2010 |
| 7778001 | Integrated circuit protected against short circuits and operating errors following the passage on an ionizing radiation An integrated circuit chip comprising a number of semiconductor components exhibiting parasitic components through which a short-circuit between the circuit supply voltage and ground could occur, wherein said semiconductor components are distributed in elementary bl... | 08/17/2010 |
| 7773359 | Overcurrent protection system and method An overcurrent protection system and method are disclosed. In one embodiment the overcurrent protection system includes a first switch connected between a supply voltage and an output voltage. A comparator circuit provides a comparator output signal having first and... | 08/10/2010 |
| 7760479 | Technique for combining in-rush current limiting and short circuit current limiting A circuit that protects from high power-on in-rush currents and short circuits. The circuit has a pass transistor and a parallel smaller transistor. A comparator senses when an output voltage crosses a reference and turns off the pass transistor and turns on the par... | 07/20/2010 |
| 7751168 | Power supply and method of controlling same A power supply supplying electric power through parallel operation of power supply units is disclosed. Each of the power supply units includes a transformer; a stopped state latch part configured to latch a control signal for controlling outputting of the power supp... | 07/06/2010 |
| 7733619 | Overcurrent breaking controller for lamps and lanterns An overcurrent breaking controller for a lamp and lantern is connected in series between AC power and a load and mainly comprises a current transformer connected to the AC power, an overcurrent restraint unit connected to the other terminal of current transformer, a... | 06/08/2010 |
| 7715163 | Electronic system and cell module thereof An electronic system and a cell module thereof are provided. The electronic system includes an electronic device and a cell module. The cell module includes a cell, a discharge switching circuit, and a surge current suppressed and controlled circuit. The discharge s... | 05/11/2010 |
| 7692912 | System and method for information handling system display backlight protection and monitoring A current limiting MOSFET monitors power applied to a direct current boost regulator that powers an LED backlight to automatically shut off power to the boost regulator if the current exceeds a predetermined amount. An embedded controller interfaces with the current... | 04/06/2010 |
| 7679876 | Current limiter system, circuit and method for limiting current A system capable of limiting a current through a load and a method thereof. The system comprises a current sensor, a determination circuit, and a current mirror circuit. The current sensor, coupled to the load, produces a current indication indicating the current. T... | 03/16/2010 |
| 7672107 | Current limit control with 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 circuitry to limit currents so as not to exceed a pre-programmed current limit. Various embodiments of the p... | 03/02/2010 |
| 7663854 | Circuit limiting cascade failure of a series of laser diodes A laser diode control system is configured to limit cascade failure of a series of laser diodes. The laser diode series is coupled to an output filter of a power supply. The power supply is a switch-mode power supply and the output filter includes an LC circuit. The... | 02/16/2010 |
