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| Number | Title | Issue Date |
| 8351174 | Apparatus comprising a brown-out protection circuit for memory devices An apparatus and method for regulating an output voltage (VO) of a voltage regulator during a brown-out condition is described. The apparatus comprises the voltage regulator, a brown-out protection circuit, a switch, and a first capacitor. The voltage reg... | 01/08/2013 |
| 8331070 | Power supply with open-loop protection A power supply with an open-loop protection according to the present invention comprises a transformer, a switch, a signal generation circuit, a feedback detection circuit, a brown-out detection circuit, and a delay circuit. The transformer receives an input voltage... | 12/11/2012 |
| 8284533 | Semiconductor device including a bootstrap diode, high side power drive circuit, low side power drive circuit, and control circuit for controlling a high side power device and low side power device A semiconductor device includes, a high side drive circuit for controlling the high side power device and including a circuit load, a low side drive circuit for controlling the low side power device, a VCC terminal connected to the low side drive circuit and for sup... | 10/09/2012 |
| 8254074 | Power control circuit A power control circuit includes a switch circuit, a current sampling circuit, a controller, and a standby power circuit. The switch circuit is connected to an alternating current (AC) power source and an electronic device. The sampling circuit is used to sample a c... | 08/28/2012 |
| 8248746 | Semiconductor device including a bootstrap diode, high side power drive circuit, low side power drive circuit, and control circuit for controlling a high side power device and low side power device A semiconductor device includes, a high side drive circuit for controlling the high side power device and including a circuit load, a low side drive circuit for controlling the low side power device, a VCC terminal connected to the low side drive circuit and for sup... | 08/21/2012 |
| 8194376 | Energy storage discharge circuitry Storage device discharge means and methods are provided. Printer circuitry detects one or more anomalous operating conditions and asserts a switch, shunting storage capacitors to ground potential through a resistive load. Discharge of the storage capacitors protects... | 06/05/2012 |
| 8189312 | Circuit arrangement for detecting undervoltage in an energy source A circuit arrangement (10) for detecting undervoltage in an energy source (12) includes a transistor switch (48) and at least one further switch element (30). The transistor switch (48) and the further switch element (30) ar... | 05/29/2012 |
| 8139335 | Protective circuit A protective circuit for electrical connection to solar cells of a solar cell module is provided with a protective circuit that has a controlled electronic circuit arrangement. In this way, only minimal heating of the protective circuit for electrical connection of ... | 03/20/2012 |
| 8054601 | Power supply control apparatus having a function supplying power supply voltage A microprocessor commonly receives at an A/D port the potentials of the power supplies output from a plurality of types of power supplies (a power supply for HDMI, a power supply for LSI, a power supply for an audio driver IC, and a power supply for a tuner). The A/... | 11/08/2011 |
| 8018702 | Power supply abnormality detection circuit for on-vehicle electronic control device The on-vehicle electronic control device includes a main power supply circuit fed with power from an on-vehicle battery through an output contact of a power supply relay and a main power supply terminal of a connector to supply a stabilized control voltage to a micr... | 09/13/2011 |
| 8000073 | Current-mode under voltage lockout circuit A current-mode under voltage lockout (UVLO) circuit provides an output signal that indicates to connected devices whether a connected power supply is sufficient (i.e., of sufficient strength and stability) based on a comparison of a current that is proportional to t... | 08/16/2011 |
| 7990672 | Supervision circuit to detect very fast power supply drops This invention is power supply protection for complex digital circuits employing an external high voltage supply and an internally generated low voltage core logic supply. Precision analog comparators distinguish between short circuit conditions on the internal supp... | 08/02/2011 |
| 7957113 | Undervoltage lockout circuit An objective is to provide a highly-reliable undervoltage lockout circuit which can block and permit normal gate-driver output even when a supply voltage steeply increases. The undervoltage lockout circuit includes a reference-voltage circuit for outputting a refere... | 06/07/2011 |
| 7948728 | Semiconductor device and method for inspecting the same A semiconductor device of the present invention includes: a power input terminal; an internal power supply circuit that converts a voltage supplied from the outside to the power input terminal into a predetermined voltage; an analog circuit connected to an output si... | 05/24/2011 |
| 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 protection points thereof are adjusted dynamically in response to detected ... | 03/15/2011 |
| 7907376 | Load control device and method A load control device includes a control circuit and a protection circuit. The control circuit controls driving of an electric load. The protection circuit monitors a power supply voltage supplied to the control circuit and stops control of driving the load by the c... | 03/15/2011 |
| 7864497 | Protective circuit A protective circuit for electrical connection to solar cells of a solar cell module is provided with a protective circuit that has a controlled electronic circuit arrangement. In this way, only minimal heating of the protective circuit for electrical connection of ... | 01/04/2011 |
| 7821754 | Circuit arrangement for producing a defined output signal A circuit arrangement for producing a defined output signal in CMOS integrated circuit is provided in which the output of a sensor signal conditioning circuit is connected to the drain terminal of a first N channel depletion transistor, to a source terminal of a sec... | 10/26/2010 |
| 7800877 | Method and electronic power supply device for supplying power to a low-voltage load protected by a protective device The invention relates to an electronic power supply device, particularly a switched-mode power supply, for supplying power to a low-voltage load protected by a protective device, and to a method therefor. The invention also relates to a device for protecting a low-v... | 09/21/2010 |
| 7768756 | Leakage current protection circuit Systems and methods are provided for substantially mitigating leakage current. One embodiment includes an integrated circuit (IC). The IC comprises a monitoring circuit configured to control switching of one of a first voltage source and a second voltage source to a... | 08/03/2010 |
| 7663852 | Output feedback and under-voltage detection system A switched mode controller for properly handling an under-voltage condition in a power line which includes a current mirror for receiving current from the power line; a reference current source coupled to the current mirror for supplying a reference current; and a p... | 02/16/2010 |
| 7595969 | Undervoltage warning method, undervoltage warning circuit and switching power supply A method for identifying a cause for insufficiency of an output voltage reduced to or below an undervoltage set value comprises a first comparison step for comparing the output voltage to a fixed first undervoltage set value and a second comparison step for comparin... | 09/29/2009 |
| 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 protection points thereof are adjusted dynamically in response to detected ... | 05/19/2009 |
| 7515393 | Voltage regulator According to one embodiment, a voltage regulator includes a switch configured to selectively conduct electrical energy according to a signal, and circuitry configured to provide the signal to implement a soft start procedure comprising varying frequency and duty cyc... | 04/07/2009 |
| 7460348 | Overload detector/enunciator An overload detector/enunciator circuit. The overload detector/enunciator circuit detects an overloaded condition of a backup generator and provides a relatively immediate indication of the overload to occupants of the residence or facility receiving power from the ... | 12/02/2008 |
| 7450359 | System and method for providing a temperature compensated under-voltage-lockout circuit A system and a method are disclosed for providing a temperature compensated under-voltage-lockout circuit that has a trip point voltage that is not sensitive to temperature variation. The under-voltage-lockout circuit of the invention comprises (1) an inverter circu... | 11/11/2008 |
| 7443641 | DC-DC converter including short-circuit protection circuit Provided is a DC-DC converter including a short-circuit protection circuit which can stably perform a reset operation and a stop operation. The short-circuit protection circuit includes a detection circuit, a delay circuit, and a latch circuit. The delay circuit is ... | 10/28/2008 |
| 7440249 | Undervoltage detection circuit An undervoltage detection circuit includes a first transistor and a second transistor coupled to a supply voltage node and arranged to form a current mirror. The undervoltage detection circuit also includes a first bipolar transistor and a second bipolar transistor.... | 10/21/2008 |
| 7417336 | Combination current hysteresis and voltage hysteresis control for a power converter Consistent with an aspect of the present disclosure, a method is provided for controlling an AC signal, which is supplied to a load and selectively supplied to a utility grid. In response to a fault in the utility grid, the method includes decoupling the AC signal f... | 08/26/2008 |
| 7408475 | Power supply monitoring device In a power supply monitoring device, a power supply voltage monitoring portion always monitors a power supply voltage supplied to a monitored circuit and outputs a voltage reduction signal when detecting that the power supply voltage is reduced below a predetermined... | 08/05/2008 |
| 7372684 | Power supply device A power supply device has a pulse width control circuit for controlling voltage converting operation of a voltage converting circuit by changing a pulse width. A momentary interruption detecting circuit detects a change in an output voltage when the output voltage s... | 05/13/2008 |
| 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 |
| 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 |
| 7362248 | Temperature tamper detection circuit and method A sensing circuit determines whether an integrated circuit is currently exposed to one of a relatively low or a relatively high temperature. A selection circuit selects a measured voltage across the base-emitter of a bipolar transistor if the sensing circuit indicat... | 04/22/2008 |
| 7359166 | Method and control system for controlling electric motors There is described a method for controlling an electric motor comprising an operating relay having relay windings with respective first and second relay contacts and a control means, which motor via current conductors is connected to said relay and a power source wh... | 04/15/2008 |
| 7349190 | Resistor-less accurate low voltage detect circuit and method for detecting a low voltage condition A low voltage detect circuit is provided herein for detecting when an external voltage (Vext) drops below a predetermined minimum voltage. In general, the low voltage detect circuit described herein may be configured to detect a low voltage condition based on a thre... | 03/25/2008 |
| 7336269 | Electronic discharging control circuit and method thereof for LCD A control circuit and a method discharging capacitor/transistor, for a liquid crystal display (LCD), are provided. The control circuit includes a signal-off detector and an all-gate-on delay cell. When an LCD power-off signal is detected, a first control signal is t... | 02/26/2008 |
| 7336060 | Circuit and method for controlling a DC-DC converter by enabling the synchronous rectifier during undervoltage lockout A control circuit for a DC-DC converter that prevents a deficiency from occurring due to sudden interruption in power supply. The control circuit activates and inactivates a main switching output transistor and a synchronous rectification output transistor to conver... | 02/26/2008 |
| 7333920 | Arc fault detector with circuit interrupter There is here disclosed a method and apparatus for detecting the occurrence of arcing of a conductor by monitoring the current on an AC power line. The signal detected is split and directed along four separate paths to generate four signals having separate character... | 02/19/2008 |
| 7329967 | Electronic control unit for car A control unit stops the supply of constant voltage into a vehicle electronic control unit in an abnormal state even though the ignition is off. A delay circuit for delaying an ignition OFF signal is installed outside the central processing unit. By controlling the ... | 02/12/2008 |
