| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361092000 | Undervoltage | 32 |
| 20080239605 | 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 side of the internal power supply circuit; an internal power output terminal connected to the output side of the internal power supply circuit; a logic circuit power input terminal; a logic circuit connected to the logic circuit power input terminal; and interterminal wiring connecting the internal power output terminal to the logic circuit power input terminal. The internal power supply circuit has a configuration of supplying power to the analog circuit and the logic circuit, and in a package assembly (finished product), a resting current in the logic circuit can be inspected without being influence by a consumption current in the analog circuit. | 10-02-2008 |
| 20080247109 | ELECTRIC OUTLET FOR COMPUTER AND RELATED COMPUTER PERIPHERALS - An exemplary electric outlet includes a power cable having a live wire and a naught wire; a first socket connected to the power cable; and at least one second socket connected to the power cable via an electric switch. The electric switch turn off the at least one second socket when a power of the first socket drops below its threshold value. | 10-09-2008 |
| 20080247110 | 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 reference voltage, a monitor-voltage circuit for outputting a monitor voltage, and a comparator for outputting, the reference voltage and the monitor voltage being inputted thereinto, a high/low signal, according to a comparison result of the reference voltage and the monitor voltage, in which the time constant of the monitor-voltage circuit for determining an increasing rate of the monitor voltage is set higher than that of the reference-voltage circuit for determining that of the reference voltage. | 10-09-2008 |
| 20080316666 | FLYBACK VOLTAGE DETECTING CIRCUIT AND APPARATUS AND METHOD FOR INDUCTIVE LOAD - An inductive load is connected between an output node and a first power supply which supplies a first power supply voltage. An inductive load driving apparatus includes a flyback voltage generation control circuit connected in series with the inductive load through the output node between the first power supply voltage and a second power supply voltage which is lower than the first power supply voltage. The flyback voltage generation control circuit includes a switch turned on in response to a first control signal and turned off in response to a second control signal, and a flyback voltage is generated on the output node when the switch is turned off, and is not generated when the switch is turned on. The inductive load driving apparatus further includes a detecting circuit configured to supply a detection signal when the flyback voltage higher than a predetermined voltage is not generated, and to stop of the supply of the detection signal when the flyback voltage higher than the predetermined voltage is generated; and a control unit configured to sequentially output the first and second control signals to the flyback voltage generation control circuit and to receive the detection signal from the detecting circuit. | 12-25-2008 |
| 20090015977 | Line Protection Load Switch For Portable Device - A portable device includes a voltage regulator for generating a regulated voltage that is supplied to a processor and to a load by way of a line protection switch, which controls a load current supplied to the load, e.g., in response to a signal supplied by the processor. The line protection switch includes a gate control circuit with a comparator that detects a short circuit in the load by comparing the regulated voltage against a reference voltage. When a short circuit causes the regulated voltage to drop below a predetermined minimum voltage (e.g., 4.5V), the comparator de-asserts the control signal, thereby turning off the switch before the regulated output voltage falls below a minimum operating voltage (e.g., 4.35V) of the processor. | 01-15-2009 |
| 20090034141 | System and Method for Power Good Monitor for Multiple Information Handling System Power Supplies - A switched power rail monitor compares voltages provided by a switched power rail and a power source to detect a predetermined differential indicative of a fault at the switched power rail. A switched power rail fault is communicated to a power manager to take corrective action, such as cutting off power to information handling system components. In one embodiment, a pair of bipolar junction transistors monitor the voltage differential to send an enable signal if the differential is within limits and a disable signal if the differential exceeds limits. | 02-05-2009 |
| 20090040676 | CIRCUIT FOR DETECTING POWER SUPPLY VOLTAGE DROP - Provided is a circuit for detecting power supply voltage drop having a small circuit scale. An NMOS transistor ( | 02-12-2009 |
| 20090116160 | 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 condition of the power system. Specifically, using voltage and current conditions in the power system to modify the over current protection and the thermal protection maximizes the performance of the power system and covers the process bias in the circuits. | 05-07-2009 |
| 20090168284 | CIRCUIT ARRANGEMENT FOR DETECTING UNDERVOLTAGE IN AN ENERGY SOURCE - Disclosed is a circuit arrangement ( | 07-02-2009 |
| 20090219661 | Power switching circuit - A power switching circuit according to an exemplary embodiment of the present invention includes an output transistor connected between a power supply terminal VCC and an output terminal OUT, an output controller which controls a conducting state of the output transistor according to an input signal, a sense transistor having a gate commonly connected with the output transistor, which detects an output current flowing into the output transistor, an output current detection terminal in which a detection voltage is generated according to the output current detected by the sense transistor and a short circuit detector which detects a short circuit condition of the output current detection terminal according to the detection voltage and stops the output transistor or limits the output current. | 09-03-2009 |
| 20090231770 | 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 the power supply and a reference current. The current-based UVLO circuit employs a reference current generator that is capable of providing a stable reference current and a voltage-to-current converter that provides a current proportional to the power supply voltage. A comparator compares the reference current to the current proportional to the power supply voltage and determines based on the magnitudes of the two currents whether the power supply voltage is sufficient or ‘good’ and generates an output signal indicating the status of the power supply voltage. | 09-17-2009 |
| 20090244798 | POWER STATUS NOTIFICATION METHOD AND POWER STATUS NOTIFICATION CIRCUIT - A power status notification method notifying a first device that a second power supply of a second device different from a first power supply of the first device is turned off, where a source voltage of the first power supply is different from a source voltage of the second power supply. The power status notification method and circuit include supplying the first device with a low-level notification signal indicating a power off state of the second power supply in a case where the source voltage of the second power supply drops to a predetermined voltage or is less than the predetermined voltage and setting the predetermined voltage at a value higher than a threshold level at which a circuit of the first device supplied with the notification signal recognizes as a low level. | 10-01-2009 |
| 20090316320 | 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 microprocessor. When contact failure occurs in the main power supply terminal, the main power supply circuit is fed with bypass power from the output contact through a first electrical load and a commutation diode to perform the one of the report of the abnormality and the storage of the abnormality occurrence history information. A bypass power fed state is detected when an input voltage to the main power supply circuit is lower than a power supply voltage of the on-vehicle battery. | 12-24-2009 |
| 20100214707 | BATTERY PACK AND OVER-DISCHARGE PROTECTING METHOD THEREOF - A battery pack includes a first battery stack having a plurality of battery cells connected in series, a second battery stack having a plurality of battery cells connected in series and connected in parallel to the first battery stack, a controller for sensing voltages of the plurality of battery cells of the first battery stack and the plurality of battery cells of the second battery stack and for outputting a fuse blowing signal when at least one of the sensed voltages is lower than a first reference voltage, and a fuse blowing unit for electrically decoupling the first and second battery stacks from an output terminal of the battery pack in response to the fuse blowing signal from the controller. A fuse blowing signal is also sent to the fuse blowing unit when the at least one of the sensed voltages is higher than a second reference voltage. | 08-26-2010 |
| 20110188164 | Reverse Battery Cutoff Circuit for an Actuator or the Like - A reverse battery protection circuit for an actuator or the like. The circuit includes at least a first transistor and a second transistor which is coupled to both the first transistor and a voltage supply in a manner wherein the second transistor is adapted to turn the first transistor off in the event of an interruption in the voltage supply. | 08-04-2011 |
| 20110199710 | SEMICONDUCTOR 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 supplying a VCC potential to the low side drive circuit, the VCC potential serving as a power supply potential to the low side drive circuit, a bootstrap diode connected at its anode to the VCC terminal and at its cathode to the high side drive circuit and used to produce a VB potential serving as a power supply potential to the high side drive circuit, and means for turning off the circuit load before the VB potential becomes lower than the VCC potential. | 08-18-2011 |
| 20110242718 | PROTECTION CIRCUIT FOR CENTRAL PROCESSING UNIT - A protection circuit for a central processing unit (CPU) is provided. The protection circuit has a detecting unit and an enable switch. The detecting unit detects whether the short is occurred or not between a power pin of the CPU and the ground end before providing a system voltage to the CPU. The enable switch is coupled to the detecting unit. The enable switch determines whether to provide the system voltage to the power pin of the CPU according to the detecting result of the detecting unit. When the short is occurred between the power pin of the CPU and the ground end, the enable switch turning off for cutting off the system voltage from being provided to the CPU and prevents an electronic device including the CPU from booting. | 10-06-2011 |
| 20110317323 | CONTROL CIRCUIT AND ELECTRONIC DEVICE USING THE SAME - An electronic device connected to an external storage device and stores data transmitted from the storage device, the electronic device comprising a power supply, a control circuit and a storage unit. The power supply supplies a voltage to the storage unit via the control circuit. The control circuit generates a first control signal when the output voltage of the protection unit is less than a working voltage of the storage unit, and generates a second control signal when the output voltage of the protection unit is at least a working voltage of the storage unit. The storage unit is disabled in response to the first control signal, and enabled in response to the second control signal. | 12-29-2011 |
| 20120092801 | UNDER-VOLTAGE PROTECTION CIRCUIT FOR BATTERY - An under-voltage protection circuit has a power input terminal connected to a battery, a power output terminal connected to an electronic device, a switch circuit for switching the power supply circuit from the power input terminal to the power output terminal, a control circuit for controlling the switch circuit, and a control voltage generating circuit that generates a first control voltage when the switch circuit is cut off. The control circuit controls the switch circuit in accordance with the first control voltage. The control voltage generating circuit further generates a second control voltage when the switch circuit is conductive, and then the control circuit controls the switch circuit in accordance with the second control voltage. | 04-19-2012 |
| 20120170166 | OVERCURRENT PROTECTION DEVICE AND OVERCURRENT PROTECTION SYSTEM - Provided are an overcurrent protection device and an overcurrent protection system which can provide time differences among the timings for executing the retry operations among a plurality of overcurrent protection devices connected to a common power supply. When a battery voltage (VBA) becomes a value equal to or lower than a threshold voltage after an FET (Q | 07-05-2012 |
| 20120182660 | RESISTANCE DETERMINING SYSTEM AND METHOD FOR CIRCUIT PROTECTION - A resistance determining system and method for a protection circuit, includes a resistance determining unit. The resistance determining unit interconnects a microcontroller and a digital resistor, where the microcontroller has first setting voltage corresponding to a first voltage threshold for activating the protection circuit, and the microcontroller is capable of receiving and converting a first external voltage input to the protection circuit to be a first converted voltage. The digital resistor includes a first variable resistor having two terminals connected to the respective first terminal and the second terminal. The microcontroller adjusts a resistance of the first variable resistor to be a first threshold resistance if the first converted voltage is substantially equal to the first voltage threshold, and the first resistance is determined to be substantially equal to the first threshold resistance. | 07-19-2012 |
| 20120327545 | RECLOSER DEVICE AND METHOD OF OPERATION - A device for interrupting the flow of electrical power in an electrical distribution system is provided. The device includes a sensor operably coupled to the electrical distribution system. A switching mechanism is coupled to the electrical distribution system, the switching mechanism movable between an open position and a closed position. A controller operably coupled to the sensor and the switching mechanism, the controller having a processor that is responsive to executable computer instructions when executed on the processor incrementing a first counter in a first mode of operation and a second counter in a second mode of operation. Wherein the processor is further responsive to executable computer instructions for switching from the first mode to the second mode in response to a signal from the sensor. | 12-27-2012 |
| 20130170087 | PROTECTION CIRCUIT FOR MEMORY CONTROL CHIP - A protection circuit for a memory control chip of a computer includes a controller, a switch circuit, a memory control chip, and a delay circuit. The controller outputs a high level control signal when the computer is in a first state, and outputs a low level control signal when the computer is in a second state. The switch circuit connects or disconnects the connection between a power pin of the memory control chip and a power terminal, according to the control signal. The delay circuit imposes a predetermined time delay for receiving a high level control signal, and outputs an enable signal to an enable pin of the memory control chip to make the memory control chip operate again, after a predetermined delay. | 07-04-2013 |
| 20130208384 | APPARATUS AND METHODS FOR LIMITING SURGES IN LOAD CURRENT - Apparatus and methods related to limiting surge current are provided. An under-voltage condition on a node is sensed and respective signals are provided in response. The under-voltage condition correlates to a surge in load current drawn from the node. A foldback signal is provided to a power controller to adjust the voltage on the node. The foldback signal is nullified when the surge current condition has been curtailed. Printers, computers and other apparatus can include surge current-limiting accordingly. | 08-15-2013 |
| 20130301178 | Control Circuit and Synchronous Protection Control System - A control circuit, comprising a protection detection circuit, a protection synchronous output circuit, a protection synchronous input circuit and a protection circuit, is provided. The protection detection circuit is adapted to generate an error notice signal when detecting an error condition. The protection synchronous output circuit is coupled to the protection detection circuit far enabling a level of a protection synchronous pin to be a protection level when receiving the error notice signal. The protection synchronous input circuit is coupled to the protection synchronous pin for generating a synchronous protection signal when the level of the protection synchronous pin has been at the protection level for a predetermined time period. The protection circuit generates a protection signal to make the control circuit enter a protection mode when receiving one of the error notice signal and the synchronous protection signal. | 11-14-2013 |
| 20130342947 | ABNORMAL VOLTAGE DETECTING DEVICE - An abnormal voltage detecting device monitors abnormal decrease in monitoring voltage during a start up period of a voltage generating apparatus. The abnormal voltage detecting device comprises a level shift circuit that generates a reference voltage for a start up period by reducing, in a predetermined amount, voltage from a reference voltage for soft starting, and further comprises a three input comparator that receives a monitoring voltage, a reference voltage Vref, and the reference voltage for the start up period, and that reverses a logical output when the monitoring voltage is lower than the reference voltage Vref and the reference voltage for the start up period. An abnormality detecting signal is delivered when the logical output of the three input comparator is reversed, and operation of an output circuit is inhibited until the reference voltage for the start up period exceeds a predetermined start up determining voltage. | 12-26-2013 |
| 20140016239 | THRESHOLD VOLTAGE AND DELAY TIME SETTING CIRCUIT, AND BATTERY MANAGEMENT SYSTEM INCLUDING THE SAME - The present invention relates to a threshold voltage and delay time setting circuit, and a battery management system including the same. The setting circuit is connected to a set resistor and a set capacitor through a pin. The setting circuit includes a threshold voltage setter for setting a threshold voltage according to resistance of the set resistor, and a delay setter for determining a count frequency according to capacitance of the set capacitor and setting a delay time according to the determined count frequency. | 01-16-2014 |
| 20140036401 | SEMICONDUCTOR DEVICE, ELECTRONIC DEVICE, AND METHOD OF TESTING THE SEMICONDUCTOR DEVICE - A semiconductor device includes a supply terminal that receives a supply voltage from an outside and supplies the supply voltage to a power supply line, a ground terminal that receives a ground voltage from the outside, a first I/O terminal that conducts a logical input signal from the outside, a first diode that is disposed between the supply terminal and the first I/O terminal so that the supply terminal is located on a cathode side and the first I/O terminal is located on an anode side, and a determination unit that compares voltages of the power supply line and the first I/O terminal, and outputs an abnormal signal when the voltage of the supply terminal is less than the voltage of the first I/O terminal. | 02-06-2014 |
| 20140362487 | Measuring System having at least One field Device with at Least One Display Apparatus as well as Method for Operating Same - A measuring system having at least one field device with at least one display apparatus, wherein the display apparatus is embodied for displaying data, information and diagnostic reports of the field device, wherein the field device is supplied with voltage via a voltage input. A monitoring system is provided, which monitors the voltage at the voltage input and recognizes a voltage reduction, and the field device is embodied to execute a service program, which performs steps to shut down the field device in the case of a detected voltage reduction, characterized in that the service program is embodied, in the case of a detected voltage reduction, to show on the display apparatus a diagnostic report, which describes the state of the field device. The invention relates further to a method for operating the measuring system. | 12-11-2014 |
| 20150022926 | METHOD AND CIRCUITRY FOR BATTERY PROTECTION - There is disclosed a method comprising providing a first signal to an apparatus comprising a protection circuit and an output for providing electric power. The protection circuit comprises at least an overdischarge detection element and a discharging control output. The first signal is used to change a voltage level at an input of the overdischarge detection element of the protection circuit. The change of the voltage level at the input of overdischarge detection element is detected, and a second signal is provided at the discharging control output to switch off the output of the apparatus. There is also disclosed an apparatus comprising a protection circuit comprising at least an overdischarge detection element and a discharging control output. The apparatus also comprises an output for providing electric power; the protection circuit; and a first signal input adapted to receive a first signal to change a voltage level at an input of the overdischarge detection element of the protection circuit. The overdischarge detection element is configured for detecting the change of the voltage level at the input of the overdischarge detection element, and for providing a second signal at the discharging control output to switch off the output of the apparatus. | 01-22-2015 |
| 20150085413 | Battery protection circuit and system - Techniques pertaining to battery protection circuits are disclosed. According to one embodiment of the present invention, the battery protection circuit includes a power button, a power detection circuit, a first switch coupled between the power button and the power detection circuit, the power detection circuit configured to output a power-off signal when either the first switch or the power button is in a switch-off state, a low-voltage detection circuit coupled with a battery and configured to detect whether a voltage of the battery is lower than a low-voltage detection threshold or not, and switch off the first switch to cut off an electric leakage path of the battery when the voltage of the battery is determined to be lower than the low-voltage detection threshold, and a power management circuit coupled with the power detection circuit and configured to cut off an electric discharge path of the battery to prohibit the battery from discharging when receiving the power-off signal. | 03-26-2015 |
| 20160134100 | UPSTREAM PARALLEL ARC FAULT OUTLET PROTECTION METHOD - An arc fault circuit interrupter (AFCI) outlet is disclosed which detects and interrupts upstream parallel arc faults. The example AFCI outlet includes a switching element coupled between the line and neutral conductors at the outlet. The outlet also includes a voltage sensor and a current sensor. A parallel upstream arc fault is detected from a sensed voltage drop and no corresponding increase in current. On detecting the arc fault, the switching element is closed and current flows through the relatively lower resistance switching element interrupting power through the arc fault. The closed switching element results in an overcurrent condition causing an upstream conventional thermal-magnetic circuit breaker to trip. | 05-12-2016 |
