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| Number | Title | Issue Date |
| 8159802 | 3-phase power factor corrected AC to DC filtered switching power supply This invention relates to a power supply apparatus and method for converting three-phase delta AC power to DC power using EMI filters and PFC circuits to maintain balanced AC current loading and reduce radiated and conducted emissions. Overcurrent and temperature pr... | 04/17/2012 |
| 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 circuit is controlled by a microcontroller (130) switch... | 04/17/2012 |
| 8089742 | Overcurrent protection apparatus for load circuit To provide an overcurrent protection apparatus which can surely protect a load circuit from an overcurrent with a simple configuration. Supposing that the temperature increasing amount of a semiconductor element caused when the semiconductor element is turned on is ... | 01/03/2012 |
| 8050006 | Method and system of providing overload and short-circuit protection for switched mode power supply A method of providing overload and short-circuit protection for a Switched Mode Power Supply (SMPS). The method may rely upon sensing a temperature change rate for a component of the SMPS and implementing a protection scheme when the temperature change rate exceeds ... | 11/01/2011 |
| 7940505 | Low power load switch with protection circuitry Load switches are relatively common and in use with a variety of applications, and conventional load switches have been designed to have continually operating protection circuitry, which can consume a great deal of power. Here, a load switch integrated circuit (IC) ... | 05/10/2011 |
| 7885048 | Semiconductor device and an electronic apparatus incorporating the semiconductor device A semiconductor device and an electronic apparatus incorporating the semiconductor device are disclosed. The semiconductor device includes a power circuit that further includes a power transistor for providing current to a load (load current), a temperature d... | 02/08/2011 |
| 7768759 | Control circuit of semiconductor device having over-heat protecting function A control circuit of a semiconductor device includes: a semiconductor element which supplies an electric power to a load; an over-heat protecting unit having: a temperature detecting section which detects a rise in temperature; a latch section which holds an output ... | 08/03/2010 |
| 7672106 | Switching incandescent lamps and other variable resistance loads with a solid state, smart, high side driver having overcurrent and temperature sensing protection circuits A circuit and method for controlling a smart, high side driver with current and temperature sensing so that it can turn ON a relatively high current load of incandescent lamps or similar loads within a practical time. The output of the high side driver is sensed. In... | 03/02/2010 |
| 7586726 | Switching element overcurrent protection circuit which operates within a high-voltage system that incorporates the switching element A circuit for detecting excessive current flow through a switching element derives an electrical quantity relating to a condition of the switching element and correlated with the current level, and compares the magnitude of that electrical condition quantity with a ... | 09/08/2009 |
| 7542259 | Protection apparatus and method for protecting electronic system using the same A protection apparatus adapted for providing thermal protection to an electronic system includes a thermal detection module and a comparator unit. The thermal detection module is configured for outputting a first voltage signal with positive temperature coefficient ... | 06/02/2009 |
| 7522397 | Input/output interface with current sensing An interface circuit includes an input terminal, a controlled current sink, a current measurement arrangement, and a logic circuit. The input terminal is configured to receive an input signal. The controlled current sink is operably coupled to the input terminal, an... | 04/21/2009 |
| 7468878 | Low voltage output for an electronic ballast A high frequency electronic ballast for main loads, such as an HID lamp, includes a regulated low voltage output to drive auxiliary loads. A low voltage microcontroller generates a low voltage drive signal in response to voltage and frequency of a high voltage power... | 12/23/2008 |
| 7453679 | Apparatus and method for driving inverter circuit An inverter apparatus includes an inverter circuit, a temperature sensor, and a control circuit. The inverter circuit is driven by a PWM signal and includes switching elements that are divided in first and second groups. The temperature sensor detects a temperature ... | 11/18/2008 |
| 7400482 | Circuit breaker and method for sensing current indirectly from bimetal voltage and determining bimetal temperature and corrected temperature dependent bimetal resistance A circuit breaker includes a bimetal electrically connected in series with separable contacts, and an operating mechanism structured to open and close the contacts. A temperature sensor distal from the bimetal includes an output having an ambient temperature signal.... | 07/15/2008 |
| 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 source for a load. A malfunction determination circuit determines whet... | 07/08/2008 |
| 7379285 | Apparatus for driving inductive load An apparatus is disclosed that drives an inductive load according to a control signal from an external controller transmits temperature data to it for indicating a condition of the inductive load through a line driver. The external controller regenerates the control... | 05/27/2008 |
| 7376359 | Digital regulated light receive module and regulation method The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The digital optical receiver module includes elements as follow: a voltage o... | 05/20/2008 |
| 7369389 | Electronic trip unit for circuit breakers An electronic trip unit for a circuit breaker is disclosed. The electronic trip unit has a processing circuit, a real time clock chip, and a power source for powering the real time clock chip in the absence of current in the circuit breaker. The processing circuit i... | 05/06/2008 |
| 7368973 | Temperature sensor circuit To provide a temperature sensor circuit capable of obtaining a highly precise output voltage as a desired output voltage. The temperature sensor circuit includes: at least a constant current source; and a base-to-emitter voltage multiplication circuit constructed by... | 05/06/2008 |
| 7369387 | Apparatus and method for temperature-dependent transient blocking An apparatus and method for temperature-dependent transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least one depletion mode p-channel device. The interconnection is performed s... | 05/06/2008 |
| 7362011 | Apparatus for preventing corrosion of contact An apparatus for preventing a contact from being corroded includes a power source, a signal line connected to the contact, a resistance connected to the signal line, a switching section, a comparator, and an overheat detecting section. The switching section has a sw... | 04/22/2008 |
| 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 limits. The state machine implements a wait loop in response to selec... | 04/22/2008 |
| 7352522 | Control means and method of controlling a current through a coil Method of controlling a current through a coil (L) for the generation of a magnetic field (H) in which: a parameter is determined which is a measure for the value of the resistance (RL) of the coil (L), the current (IL) through the coil (L) is ... | 04/01/2008 |
| 7337336 | Method for rapid port power reduction A method for rapidly reducing power in the event of a change in power source conditions, comprising: obtaining an indicator of one of current power consumption of ports being supplied power and current power allocation of ports being supplied power; storing for at l... | 02/26/2008 |
| 7336464 | Power limiting circuit A power limiting circuit is disclosed. The power limiting circuit includes a temperature sensing circuit that outputs a temperature signal that is proportional to temperature over a temperature range. The power limiting circuit also includes a regulation circuit cou... | 02/26/2008 |
| 7333313 | Multiplexed temperature sensing circuit for HID lamp ballast A temperature sensing circuit for a ballast for a HID lamp multiplexes the temperature measurement function with another function to reduce the number of pins required for the temperature measurement function performed by the microcontroller of the ballast. The circ... | 02/19/2008 |
| 7330046 | Circuits and methods for failure prediction of parallel MOSFETs Power conversion circuits often consist of several MOSFETs operating in parallel. Due to thermal cycling and mechanical operations. MOSFETs or the respective electric connections of the MOSFETs may fail. For certain implementations, a diagnosis circuit for a plurali... | 02/12/2008 |
| 7301129 | Control circuit for semiconductor device having overheating protection function A control circuit includes a drive circuit which applies a drive voltage to a semiconductor device having an overheating protection function according to an externally supplied signal; and a current detecting circuit which outputs a detection signal when a drive cur... | 11/27/2007 |
| 7296247 | Method and apparatus to improve pass transistor performance A control circuit generates a temperature-dependent gate voltage for turning on a transistor. For NMOS transistors, the gate voltage is increased in response to decreases in temperature to compensate for corresponding increases in the transistor's threshold voltage,... | 11/13/2007 |
| 7271990 | Smart solid state relay An electrical system includes a solid state relay (1) and an electrical connector (2) that connects solid state relay (1) to a load (4). The solid state relay (1) includes a power MOSFET (Q1) for switching power to the load ... | 09/18/2007 |
| 7260007 | Temperature determination and communication for multiple devices of a memory module Thermal management and communication is described in the context of memory modules that contain several memory devices. In one example, the invention includes determining a temperature of a first memory device, the first memory device containing a plurality of memor... | 08/21/2007 |
| 7250794 | Voltage source converter A voltage source converter with a line-side diode rectifier, a load-side inverter with an electronic circuit, a power supply for the electronic circuit, and a slim DC link with a DC link capacitor is described. The slim DC link connects a DC output side of the line-... | 07/31/2007 |
| 7242113 | Power semiconductor device A power semiconductor device which makes a heat come hard to arise in a particular element and is able to control an increase of the amount of a power loss caused by a tail current, even in case that plural power semiconductor elements are connected in parallel is p... | 07/10/2007 |
| 7217914 | Method for calibrating an optoelectronic device based on APD breakdown voltage Methods and processes are disclosed for calibrating optoelectronic devices, such as optoelectronic transceivers and optoelectronic receivers, based upon an avalanche photodiode breakdown voltage. In general, the method involves adjusting a reverse-bias voltage of th... | 05/15/2007 |
| 7215525 | Overheat protector for a dc-to-dc converter or the like A Schottky barrier diode is employed for temperature sensing, being capable of indicating temperatures above 110° C. or so by the magnitude of its reverse current. The overheat protector is disclosed as incorporated in a dc-to-dc converter in which, connected in se... | 05/08/2007 |
| 7212391 | Grounded isolation system An system and method are disclosed for isolating and grounding a load device, where grounding only occurs after the voltage(s) on the load device have been reduced to acceptable levels. The system includes power and grounding contacts, a sensing device, and a contro... | 05/01/2007 |
| 7193826 | Motor disconnect arrangement for a variable speed drive A motor disconnect arrangement is provided for a variable speed drive having a plurality of inverters electrically connected in parallel to a DC link to power a plurality of motors. The disconnect arrangement includes a contactor or other disconnect device connected... | 03/20/2007 |
| 7183887 | Control means and method of controlling a current through a coil An electronic circuit comprising means (CMNS) for controlling a current (IL) through a coil (L) for the generation of a magnetic field (H). The means (CMNS) comprise means (DMNS) for the determination of a parameter which is a measure for the value of the resistance... | 02/27/2007 |
| 7176804 | Protection of power semiconductor components A method and a system for protecting the power semiconductor components used in the powerstages of power electronics devices, such as frequency converters, wherein calculation modeling the degree of heating of the semiconductor junction of the power components (V... | 02/13/2007 |
| 7173802 | Temperature protection device for power devices In a temperature protection device for power devices of the present invention, detected temperatures of power devices are compared with respective threshold values by determination units. If either one of the determination units determines that there is abnormal hea... | 02/06/2007 |
