Abstract: The present invention provides a power supply fuse alarm circuit and an alarm apparatus, where the alarm circuit is connected to a power access module of multiple combined paths and includes multiple groups of alarm units, and each of the alarm units includes: a voltage step-down module, which performs step-down processing on a voltage provided by the power access module, to output a working voltage applicable to the alarm circuit; a control module, which outputs a pulse control signal with a certain duty cycle in a case of normal power supply; a power consumption module, which generates an alarm blowing current according to the pulse control signal, so that the alarm blowing current serves as a virtual load to blow an alarm fuse by using the alarm blowing current after a main fuse is blown; and a protection module, which disconnects the power consumption module after a control circuit fails.

Abstract: An overcurrent detection circuit and method for one or more capacitive loads includes sensing current being supplied to the one or more capacitive loads to thereby generate a sensed current, and sensing a voltage rate of change across the one or more capacitive loads to thereby generate a differentiator output. The differentiator output is added to a fixed reference setpoint to thereby generate an overcurrent setpoint. The sensed current is compared to the overcurrent setpoint, and an overcurrent trip signal is supplied when the sensed current is greater than or equal to the overcurrent setpoint.

Abstract: A solar device is provided. The solar device includes a solar module configured to absorb solar energy to convert the solar energy to electrical energy, a DC converter configured to detect an input voltage output from the solar module and outputs a DC voltage corresponding to a maximum power point through the detected input voltage, an interface unit configured to transmit data including the input voltage detected from the DC converter and the DC voltage corresponding to the maximum power point, a data combiner configured to combine and transmit data on the solar module with the data received from the interface unit, a data synthesizer configured to remove a DC voltage offset from the data received from the data combiner, and a data controller configured to track a maximum power point using data from which the DC voltage offset has been removed.

Abstract: Disclosed herein is a detection apparatus including: a resonant circuit provided with a Q-factor measurement coil and one or more capacitors to serve as a circuit for receiving pulses; a response-waveform detecting section configured to detect the waveform of a response output by the resonant circuit in response to the pulses; and a Q-factor measuring section configured to measure a Q factor of the resonant circuit from the response waveform detected by the response-waveform detecting section. It is possible to increase the precision of detection of a metallic foreign substance existing between a power transmitting side and a power receiving side.

Abstract: Provided is an operating method of an electronic device including a first processor, a humidity sensor, a second processor controlling the humidity sensor, and a battery, wherein the second processor and the battery are waterproofed. The method may include: detecting a power supply event from the battery; supplying a power from the battery to the second processor controlling the humidity sensor and not supplying the power to the first processor; determining, by the second processor, a humidity of the electronic device by using the humidity sensor; and when the humidity of the electronic device is greater than a first reference humidity, cutting off power supply from the battery and when the humidity of the electronic device is less than the first reference humidity, supplying the power to the first processor.

Abstract: A power cord apparatus for remotely detecting excessive operational parameters in an alternating current (AC) powered machine (e.g., dehumidifiers, air conditioners, refrigerators, and Computer Numerically Controlled (CNC) machines) is provided. The power cord apparatus includes a cooperative remote parametric sensing device (e.g., heat sensing, vibration transducer) in the vicinity of the electrically powered machine.

Abstract: A de-chuck control method is provided for de-chucking a workpiece from an electrostatic chuck, which includes a chuck electrode and electrostatically attracts the workpiece. The de-chuck control method includes acquiring a time-integration value of a current by measuring the current flowing from the chuck electrode for a predetermined time period after a plasma process is ended and a voltage applied to the chuck electrode is turned off; calculating a difference between the time-integration value of the current and an electric charge charged to the chuck electrode during the plasma process; calculating a counter voltage according to a residual charge of the electrostatic chuck based on the difference and a predetermined correlation between the time-integration value of the current and a torque acting on a support pin for supporting the workpiece; and applying the counter voltage to the chuck electrode while introducing gas into a processing chamber and generating plasma.

Abstract: An input/output (IO) circuit including: an IO driver circuit; an electrostatic discharge (ESD) protection semiconductor switch with a first input configured to receive an ESD, a second input connected to an ESD rail, and a switch control input; an ESD trigger circuit connected to the switch control input, wherein the ESD trigger circuit is configured to produce a trigger signal to close the protection semiconductor switch when the ESD detection circuit detects an ESD; and a bias circuit configured to provide a back bias signal to an isolated well of the ESD protection semiconductor switch when IO circuit is in normal operation.

Abstract: A surge protection circuit having an open circuit voltage surge protector, such as a gas discharge tube (GDT), a closed circuit current surge protector, such as a thermistor, and a thyristor. The GDT has a breakdown voltage that is at least a first defined amount higher than an anticipated highest peak voltage. The thermistor has a series resistance associated with a series resistance of electrical equipment being protected and a breakdown voltage that is at least a second defined amount higher than an impulse voltage (voltage required to excite the GDT based on the breakdown voltage) for the GDT. The thyristor has a rated peak current at least a third defined amount greater than a peak current for the thermistor.

Abstract: Various embodiments relate to a light emitting diode protection circuit, including: a plurality of diodes connected in series; an input connected to a first diode of the plurality of diodes; an output; a first resistor connected between the plurality of diodes and the output; a transistor with a gate connected to a junction between the first resistor and the plurality of diodes and a source connected to the output; a second resistor connected between the input and drain of the transistor; and a silicon controlled rectifier (SCR) with an anode connected to the input, a base connected to the drain of the transistor, and a cathode connected to the output.

Abstract: A direct current-to-direct current (DC-DC) power supply includes a voltage converter module that converts an input voltage having a first voltage level into an output voltage having a second voltage level that is less than the first voltage level. An over-voltage detection module receives the second voltage and generates an over-voltage signal indicating an over-voltage condition of the DC-DC power supply. A shutdown module receives the over-voltage signal and generates a shutdown signal in response to the over-voltage condition. An over-voltage protection module interposed between the shutdown module and the input of the voltage converter module. The over-voltage protection module is configured to selectively inhibit delivery of the input voltage to the voltage converter module in response to the shutdown signal.

Abstract: A plug-in unit that is configured to stacking in an electronic equipment unit is protected during replacement of an adjacent plug-in unit in the electronic equipment unit by providing at least one fender on at least one side of the plug-in unit.

Abstract: An ESD protection device 1 includes a plurality of input electrodes 21a through 21d and a plurality of output electrodes 21e through 21h. The plurality of input electrodes 21a through 21d are disposed along a first direction. The plurality of output electrodes 21e through 21h are disposed along the first direction. The plurality of output electrodes 21e through 21h oppose the input electrodes 21a through 21d in a second direction which is tilted with respect to the first direction. End portions of the input electrodes 21a through 21d on a side closer to the output electrodes 21e through 21h in the second direction and end portions of the output electrodes 21e through 21h on a side closer to the input electrodes 21a through 21d in the second direction form main discharge units 31a through 31d.

Abstract: An electrical grounding arm is described and which has a predetermined geometry that dissipates stress imparted to the electrical grounding arm by the repeated movement of the electrical grounding arm, so as to inhibit stress related damage from being imparted to the electrical grounding arm, and which further, inhibits a source of fluid from pooling or collecting on the exterior facing surface thereof in order to prevent an unsanitary condition from developing.

Abstract: The present invention provides a relay-based foolproof circuit for over-voltage protection, which is electrically connected between a plug and an electric device, and includes a relay having at least one magnetic core, a coil wound around the magnetic core and two reed switches each having a reed and being normally in a closed state because of the elastic effect of its reed. The relay-based foolproof circuit is able to provide AC power of a first specification (e.g., 110 V AC power) received from the plug to the electric device. However, when AC power of a second specification (e.g., 220 V AC power) greater than the first specification flows through the coil, the coil causes the magnetic core to generate a magnetic force great enough to drive the two reed switches into an open state for stopping the AC power of the second specification from being provided to the electric device.

Abstract: An opening/closing-body drive device is achieved, in which a malfunction, caused by the electrical contacts of the relay switch freezing, can be reliably prevented from occurring. The control unit 60 includes a freeze determiner 61 which determines that the relay switch(es) is frozen when an opening/closing-body drive motor 27a does not drive a specified amount in accordance with opening/closing operational conditions of a back door 3 and when the temperature of the control unit 60 that is detected by a temperature detector 80 is lower or equal to a predetermined value; and a freeze releaser 62 which releases a frozen state of the relay switch(es) by intermittently supplying electric current for a predetermined number of times to the relay switch(es) without supplying a drive current to said opening/closing-body drive motor 27a, when said freeze determiner 61 determines that the relay switch(es) is frozen.

Abstract: A circuit for protecting an electronic functional unit connected to a data line against positive and negative overvoltages includes an analog switch arranged in the data line before the electronic functional unit and a voltage monitor, which is configured to control the analog switch, wherein the voltage monitor is configured to close the analog switch when no overvoltage occurs and to open the analog switch when an overvoltage occurs. The circuit also functions in an energy-saving mode and/or when no supply voltage is applied. The low resistance and bidirectionality of the data line are maintained.

Abstract: An interposer is described to regulate the current in wafer test tooling. In one example, the interposer includes a first connection pad to couple to automated test equipment and a second connection pad to couple to a device under test. The interposer further includes an overcurrent limit circuit to connect the first and second connection pads and to disconnect the first and second connection pads when the current between the first and second connection pads is over a predetermined amount.

Abstract: A protection circuit includes a first resistive element configured for coupling to a protected circuit. The first resistive element has a particular resistance value. The protection circuit also includes a voltage regulator coupled to the first resistive element. The particular resistance value is selected to enable a magnitude of a bias current provided to the protected circuit to remain within a first operating current range associated with the protected circuit and to remain below a latchup holding current value associated with the protected circuit.

Abstract: The invention relates to Modular multilevel converter valve protection method, the modular multilevel converter valve consists of 6 arms, the arm includes sub modules, 1 arm is controlled by 1 control host, 6 control hosts is controlled by 1 summary control host, the method of the invention includes that the arm realizes locking sub module, bypass sub module, trip requests and system switching request and the summary control host implements summary and control response. The invention improves the reliability of two protection system through the use of dual redundancy protection method, clears the protection division through the layered protection frame of the upper summary control host and multi arm control host. And finally, it improves the whole safety and reliability of the modular multilevel converter valve.