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| Number | Title | Issue Date |
| 8064179 | Integrated circuit including a switching regulator design for power over Ethernet devices A powered device includes an interface that is responsive to a powered network and an integrated circuit device that is coupled to the interface to receive power and data from the powered network. The integrated circuit device includes a power rectification and prot... | 11/22/2011 |
| 8031449 | Fast-responding short circuit protection system with self-reset for use in circuit supplied by DC power A short circuit protection system includes an inductor, a switch, a voltage sensing circuit, and a controller. The switch and inductor are electrically coupled to be in series with one another. A voltage sensing circuit is coupled across the switch and the inductor.... | 10/04/2011 |
| 7944662 | Multi-battery system for high voltage applications with proportional power sharing A multi-battery system comprises a circuit having a circuit positive terminal and a circuit negative terminal. At least two batteries are provided to combine to deliver required system power. The batteries are connected to a protection circuit, an energy storage dev... | 05/17/2011 |
| 7944661 | Protection circuit, flat display device using the same, and method for driving flat display device using the same A protection circuit which is capable of preventing a faulty operation resulting from an abnormal control signal a method for operating the same, a flat display device using the same, and a method for driving the flat display device using the same are disclosed. The... | 05/17/2011 |
| 7821753 | DC high power distribution assembly A DC high power distribution system provides power to a load in parallel with one or more storage capacitors. The system includes a hot-swap controller and an array of parallel-connected transistors connected in series between a DC source and the capacitors/load. A ... | 10/26/2010 |
| 7675725 | Constant voltage output circuit A constant voltage output circuit has an output power transistor supplied with electric power form a first input power source and a control circuit supplied with electric power from a second input power source. Here, when the voltage from the first input power sourc... | 03/09/2010 |
| 7633732 | Electrical over/under voltage automatic disconnect apparatus and method An analog or digital circuit that senses both low and high input voltage and operates to disconnect both line and neutral electrical power connections to a protected device when abnormally low or high voltages are received from a single- or multi-phase power source,... | 12/15/2009 |
| 7623331 | Method and system for improving voltage regulator accuracy in vehicle alternators A method for implementing voltage regulation for an electrical generator device includes comparing an output voltage of the electrical generator device to a desired set point voltage thereof, and generating an output control signal configured to regulate a field cur... | 11/24/2009 |
| 7570472 | Protection circuit for avoiding using of an improper alternating current power source A protection circuit for avoiding the use of an improper alternating current source includes: a rectifier circuit; a voltage comparator circuit having a first input terminal, a second input terminal, and an output terminal; a sampler and filter circuit; an alarm cir... | 08/04/2009 |
| 7525780 | Liquid crystal television and backlight power supplying circuit Disclosed is an inverter-circuit power supply circuit capable of redriving an inverter circuit upon temporary blackout without turning on a main power again An inverter-circuit power supply circuit according to the present invention cuts off a backlight driving sign... | 04/28/2009 |
| 7511934 | System and method for conditioning a power supply transmission for supply to a load circuit A system and method for conditioning an alternating current (“AC”) power transmission for supply to a load circuit. In one aspect, the invention is a system comprising: a power conditioning circuit comprising a voltage surge protector for eliminating voltage spi... | 03/31/2009 |
| 7471494 | Output circuit An output circuit for a circuit includes an input node coupled to the circuit, an output node, a reference potential terminal, a supply potential terminal, a semiconductor switch connected between the input node and the output node, and a control circuit. The contro... | 12/30/2008 |
| 7468875 | Plasma television and power supply control device A microcomputer 60 takes in voltages output from the sustaining voltage Vsus generation circuit 52, the addressing voltage Vadd generation circuit 53, and the standby voltage generating circuit 54 via A/D input ports 1 through 6... | 12/23/2008 |
| 7439874 | Load status indicator A load status indicator is disclosed for determining whether power is available to, and current is flowing through, a load. A first visual status indicator may light up when power is available to the load but current is not flowing through the load. A second visual ... | 10/21/2008 |
| 7423856 | Fault control circuit and method therefor In one embodiment, a fault control circuit of a switching power supply controller is configured to disable an operating voltage of the switching power supply controller responsively to a fault condition and to subsequently decouple the fault control circuit from ano... | 09/09/2008 |
| 7420791 | Fault signature system for power management integrated circuits A power management IC including a dual purpose pin, a fault detection system, and a fault signature system. The dual purpose pin performs a power management function during normal operation (e.g., a soft start pin coupled to an external capacitor, a set pin coupled ... | 09/02/2008 |
| 7394223 | Over voltage and over current protection integrated circuit An integrated circuit is disclosed including a primary input for receiving an input voltage, a battery voltage input for receiving a battery voltage signal and an output for providing an output voltage higher than the battery voltage. First circuitry responsive to t... | 07/01/2008 |
| 7385794 | Secondary battery protection device Device miniaturization is made possible by building a battery protection circuit in a microcomputer. A secondary battery protection device includes a voltage detection device that detects a voltage of a power supply circuit including a secondary battery, a current d... | 06/10/2008 |
| 7382594 | Method of forming an integrated voltage protection device and structure In one embodiment, a voltage protection circuit uses two back-to-back transistors to receive an unprotected voltage and form a protected voltage. ... | 06/03/2008 |
| 7379310 | Over-voltage protection circuit for a switched mode power supply The switched mode power supply comprises an inductor, a switching transistor, a controller circuit coupled to the switching transistor, a rectifying means and a feedback regulation loop for providing a stabilised output voltage. It comprises further a protection cir... | 05/27/2008 |
| 7373528 | Increased power for power over Ethernet applications According to one embodiment of the invention, a method for supplying power over Ethernet includes determining whether a first port of power sourcing equipment is supplying current to a power over Ethernet device in a predetermined current range. The method also incl... | 05/13/2008 |
| 7369384 | Regulator and electronic apparatus therewith To reduce the electric power wasted in an overvoltage protection circuit, a regulator IC 100 incorporates an overvoltage protection circuit 105 that stops the output operation of the regulator when the output voltage Vo becomes higher than a predetermi... | 05/06/2008 |
| 7367940 | Capsular medical apparatus A capsular medical apparatus according to the present invention includes a capsule which can be swallowed or inserted in the body, a recording device which receives living body information transmitted from the capsule and which records the received information, and ... | 05/06/2008 |
| 7369382 | Integrated circuit with an undervoltage detector An integrated circuit arrangement includes connection terminals, an undervoltage detector, and at least one circuit unit. The connection terminals are configured to receive a supply voltage. The undervoltage detector is coupled between the connection terminals and i... | 05/06/2008 |
| 7366924 | Systems and methods for disabling power management in a computer system A power adapter comprises a power supply to output power for powering a powered device when the powered device is coupled to the power adapter. The power adapter further comprises a disable throttle indicator that, when the powered device is coupled to the power ada... | 04/29/2008 |
| 7365952 | Battery pack having a protection circuit The battery pack according to the present invention is to avoid any trouble or the like of the primary or secondary battery inside the battery pack with a simple mechanical construction when a load is intermittently connected between the external terminals of the ba... | 04/29/2008 |
| 7363413 | Method and apparatus for controlling connections of PC cards and a passive-card-adapting card used for connecting one of the PC cards to the apparatus A PC card control apparatus includes a PC card connector, a card detector and an interconnection switching circuit. The PC card connector is configured to provide connections for connecting one of a first PC card compliant with specific card standards and a card-ada... | 04/22/2008 |
| 7358685 | DC-DC converter having protective function of over-voltage and over-current and led driving circuit using the same The invention relates to a DC-DC converter having over-current/over-voltage protection function and an LED driving circuit using the same. The DC-DC converter adjusts a width of a switching pulse outputted from a Pulse Width Modulation (PWM) controller to control on... | 04/15/2008 |
| 7356716 | System and method for automatic calibration of a reference voltage A system and system for automatic voltage calibration is presented. A voltage calibration system includes three main units, which are a voltage level trimming unit, a trim detection unit, and a trim control unit. The three units work in conjunction with each other d... | 04/08/2008 |
| 7355301 | Load control receiver with line under voltage and line under frequency detection and load shedding A method for detecting line under voltage (LUV) events and initializing load shedding of loads located near the electrical disturbance without customer and utility intervention. In one example embodiment, the LUV detection system samples a primary voltage source at ... | 04/08/2008 |
| 7342755 | High energy capacitor and charging procedures The invention is a high electrical energy storage system consisting of arrays of high energy capacitors and their charging and discharging protocols. An array of capacitors are conductively connected together and connected to an energy source. A computer and softwar... | 03/11/2008 |
| 7340325 | Priority powerdown system and method for power distribution systems A power controller for power sourcing equipment in a distributed power network provides power down policies and priority in the event of a power supply failure. The power down priority and policy permits implementation of a rapid decrease in the power demand of the ... | 03/04/2008 |
| 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 alarmed by a time-delay alarm circuit of the current-limiting protection ci... | 02/12/2008 |
| 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 element sets voltage drop during normal operation, and the sum of two ... | 02/05/2008 |
| 7315255 | Load status indicator A load status indicator is disclosed wherein a green light-emitting diode of a bi-color light-emitting diode lights up when power is available to but not being used by a monitored device, whereas a red light-emitting diode of the bi-color light-emitting diode lights... | 01/01/2008 |
| 7315169 | Microprocessor controlled fault indicator having inrush restraint circuit A fault indicator for indicating the occurrence of a fault in an electrical conductor has a housing, a high capacity battery, at least one light emitting diode (LED) visible from the exterior of the fault indicator upon the occurrence of a fault and which may be aut... | 01/01/2008 |
| 7310697 | System and method for dynamic USB power source The dynamic VBUS power source provides a system and method for dynamically powering USB devices. Briefly described, one embodiment is a method comprising determining when the USB device is a master device or a slave device, powering the USB device over a USB connect... | 12/18/2007 |
| 7310211 | Method for suppressing latch-ups occurring in a circuit, and systems for carrying out said method According to the invention, in order to suppress a latch-up, the supply voltage is switched off following the detection of a latch-up, charge located in the circuit is reduced with the air of a short-circuiting switch, and the detection of a low voltage is temporari... | 12/18/2007 |
| RE39933 | Power conversion integrated circuit and method for programming A single input pin (48) provides multi-functional features for programming a power supply (10). By connecting the appropriate interface circuit (92, 100, or 112) to the single input pin (48), the power supply (10) is program... | 12/04/2007 |
| 7301307 | Method and apparatus to charge a battery using determination of battery load current By determining charging current Ichar and then subsequently utilising that determination of charging current Ichar in relation to battery current Ibat and load current Iload as a result of operation of a phone or other ele... | 11/27/2007 |
