Abstract: An energy storage canopy associated with a local building is provided. The energy storage canopy includes support members that can support compartments, which may be integral with or removable from the energy storage canopy. Each compartment includes a plurality of high capacity batteries to store electrical energy, at least one power conditioner to allow coupling high capacity batteries to an external unit. The external unit may be a power grid, a building, other loads, or the like.

Abstract: A method and device for avoiding abnormal signal oscillation in UVLO test, applied to a power supply module, includes: a voltage detection module (301) detecting a voltage of an enable terminal of the power supply module during an under voltage lock out UVLO test; a difference calculation module (302) calculating a difference value between a detected voltage and a voltage trigger threshold of the enable terminal; upon a control module (303) determining that the difference value is below a preset first threshold, the control module increasing the voltage of the enable terminal during UVLO test via a voltage adjustment module. The application of the above solution of the present application can avoid abnormal signal oscillation in UVLO test.

Abstract: Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite).

Abstract: A solar module includes a series circuit of solar cells, a switch arranged in parallel with a section of the series circuit, and an actuation circuit. The actuation circuit is operably coupled to the switch, and is configured to actuate the switch in a clocked manner with a duty cycle, wherein the duty cycle is based on a voltage dropped across the series circuit or across a portion of the series circuit.

Abstract: A charge pump includes: a switch circuit that switches a current source conducted to an output node based on a signal from a phase frequency detector included in a PLL circuit; a first current source that is the current source provided between a high potential node and the switch circuit, and supplies a current to the output node by a first conduction-type depletion mode MOS transistor forming a self-bias circuit; and a second current source that is the current source provided between a low potential node and the switch circuit, and draws the current from the output node by the first conduction-type depletion mode MOS transistor forming the self-bias circuit.

Abstract: A device includes a buck converter coupled to an input node and an output node, and a linear voltage regulator coupled to the input node and to the output node.

Abstract: Inverter for an electric compressor comprising an auxiliary voltage supply that supplies a control electronics of the inverter with a DC voltage. The auxiliary voltage supply comprises a series circuit of a linear voltage regulator and a linear pre-regulator. The linear pre-regulator comprises a transistor and is connected to the input terminal of the linear voltage regulator. The linear pre-regulator and/or the linear voltage regulator are advantageously actively cooled by a refrigerant utilized in the electric compressor.

Abstract: A phase shift full bridge (PSFB) converter includes: an isolation transformer; a full-bridge having a first pair of switch devices connected in series at a first node coupled to a first terminal of the primary side of the isolation transformer, and a second pair of switch devices connected in series at a second node coupled to a second terminal of the primary side of the isolation transformer; a rectifier coupled to the secondary side of the isolation transformer; and a controller for switching the first and second pairs of switch devices out of phase with each other. Under nominal input voltage conditions for the PSFB, the controller switches the first and second pairs of switch devices at a nominal switching frequency. Under reduced input voltage conditions for the PSFB, the controller switches the first and second pairs of switch devices at a frequency lower than the nominal switching frequency.

Abstract: A power supply control device includes a switch disposed in a first current path of a current flowing from a battery. A first comparator compares a voltage value of a current input end of the switch to which the current is inputted with a voltage threshold. When the voltage value of the current input end is less than the voltage threshold, a drive circuit turns off the switch. The battery supplies, via a second current path, power to a starter that starts an engine of a vehicle. The voltage threshold is less than the voltage value of the current input end of the switch in the case where the battery supplies the power to the starter.

Abstract: A memory sub-system comprises a power management component comprising a plurality of regulators configured to output respective operating voltages for the memory sub-system. The power management component comprises a power management integrated circuit (PMIC) and is configured to monitor voltage levels of the plurality of regulators and prevent an event of the memory sub-system from occurring until the monitored voltage levels of a set of the plurality of regulators are determined to have reached respective threshold voltage levels.

Abstract: Provided is a matching device capable of realizing a high-speed matching operation. A matching device of an embodiment includes a series part, a parallel part, and one or more variable direct-current power sources. The series part includes a first diode having a variable capacitance and is provided between an input terminal of a radio frequency wave and an output terminal of a radio frequency wave. The parallel part includes a second diode having a variable capacitance and is provided between a node between the input terminal and the output terminal and a ground. The one or more variable direct-current power sources are provided to apply variable reverse bias voltages to the first diode and the second diode.

Abstract: Disclosed is a current sensing circuit to sense a current flowing through a load switch. The load switch receives a supply voltage to generate an output voltage. The current sensing circuit includes a first circuit and a second circuit. The first circuit is coupled the load switch through a first resistor, and senses the current flowing through the load switch. The second circuit is coupled to the first circuit and the load switch, senses the output voltage, and generates an adjusting current according to the output voltage. The second circuit generates the adjusting current when the output voltage is smaller than a threshold voltage, such that the ratio of the current flowing through the load switch to a current flowing through the first circuit is maintained at certain ratio, but the second circuit is disabled when the output voltage is larger than or equal to the threshold voltage.

Abstract: A circuit may include a first voltage regulator to supply a main circuit and a second voltage regulator to supply a test circuit. The test circuit may produce a test signal having a characteristic dependent on the second regulated supply voltage. A controller may adjust second voltage regulator to a threshold level to induce a change in the characteristic of the test signal. The controller may adjust the first voltage regulator based on the threshold level of the second regulated supply voltage.

Abstract: A clock driver circuit. In some embodiments the clock driver circuit includes an output stage, a first voltage source, and an output impedance adjusting circuit. The output stage includes a first transistor connected to the first voltage source and to an output of the drive circuit. The drive circuit is configured to operate in one of, at least, a first state, and a second state. The output impedance adjusting circuit is configured to reduce a difference between an output impedance of the drive circuit in: the first state, in which the first transistor is turned on and the first voltage source is at a first supply voltage, and the second state, in which the first transistor is turned on and the first voltage source is at a second supply voltage different from the first supply voltage.

Abstract: The disclosure is directed at a method and apparatus for configuring and powering light fixture loads for a LED low voltage distribution system. The method and apparatus include converting power being supplied for powering the set of light fixture loads and then limiting this converted power to a set of multiple current outputs supplied to the light fixture loads. The multiple current outputs are then split or regrouped prior to being delivered to the light fixture loads.

Abstract: A decision feedback equalizer includes a positive signal line, a negative signal line, a sense amplifier, a feedback driver, a load unit, a differential driver, and a charge pump. The differential driver maintains a difference between the first voltage of the positive signal line and the second voltage of the negative signal line at a last time point of the normal period to be equal to or greater than the reference voltage by adjusting strength of the positive input current corresponding to a positive input signal and strength of the negative input current corresponding to a negative input signal based on a temperature signal. The charge pump provides a positive offset voltage and a negative offset voltage to the positive signal line and the negative signal line, respectively. The positive offset voltage and the negative offset voltage are used to maintain an average voltage of the first voltage and the second voltage at the last time point of the normal period at a first value.

Abstract: A DC/DC converter 1 is configured to allow separation of a primary side constitution unit 3 and a secondary side constitution unit 4 of a transformer 2. A secondary side switching element FET 2 is provided in the secondary side constitution unit 4, and controls power supply to a load 12 by intermitting an output of a secondary winding L2. The primary side constitution unit 3 detects an electrical behavior of the primary side generated by the intermittent operation of the secondary side, and controls the power supplied from the primary winding L1 to the secondary winding L2 by operating the intermittent operation of the primary side switching element FET 1 such that a cycle or duty of the intermittent operation of the secondary side falls within a predetermined range.

Abstract: An apparatus includes an energy storage device, a driver circuit configured to receive energy from the energy storage device, and a bleed circuit configured to reduce an amount of the energy received by the driver circuit from the energy storage device. The bleed circuit is configured to reduce the amount of the energy received by the driver circuit during a startup period. The energy storage device may include a transformer, the driver circuit and bleed circuit being coupled to first and second windings of the transformer, respectively. A method includes receiving, by a driver circuit, energy from an energy storage device, and reducing, using a bleed circuit, the energy received by the driver circuit during a startup period. The energy storage device may include a transformer, the driver circuit and bleed circuit being coupled to first and second windings of the transformer, respectively.

Abstract: A circuit and method of over-voltage protection is provided to prevent the power supply to provide an exorbitant voltage to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger; said circuit comprises a DC input terminal, a DC output terminal, a voltage sampling circuit, a switch control circuit and a switch circuit; the voltage sampling circuit is electrically connected with the DC input terminal and the switch control circuit respectively; the switch control circuit is electrically connected with the switch circuit; the switch circuit is electrically connected with the DC input terminal, the DC output terminal and the switch control circuit respectively. When implementing the present invention, an exorbitant voltage can be prevented to provide to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger by the power supply, thus being protected from over-voltage as the exorbitant voltage may damage the products.

Abstract: Photovoltaic systems with managed output and methods for managing variability of output from photovoltaic systems are described. A system includes a photovoltaic module configured to receive and convert solar energy to DC power. The system also includes a sensor configured to detect a future change in solar energy to be received by the photovoltaic module. The system further includes a power conditioning unit coupled with the photovoltaic module and the sensor.

Abstract: The present disclosure relates to power supply circuitry that has wide bandwidth and achieves high efficiency by using at least one energy storage element for efficient power transfer between two power supply circuits and to an amplitude modulated load. Specifically, the power supply circuitry may include a first power supply circuit, which may be a switching power supply circuit, a second power supply circuit, which may be a linear power supply circuit and may include the energy storage element, and control circuitry to facilitate efficient power transfer. The control circuitry may select one of multiple operating modes, which may include a first operating mode, during which the first power supply circuit may provide power to the energy storage element, and a second operating mode, during which the second power supply circuit may provide power to the amplitude modulated load from the energy storage element.

Abstract: In aspects of the invention, a zap circuit and a decoder for decoding the output of the zap circuit turn ON only one analog switch in a selector. The selector delivers an electric potential at a node of a dividing resistor selected by the zap circuit. The output of the selector is delivered to the non-inverting input of an operational amplifier, and the output of the operational amplifier is delivered to the gate terminal of a MOSFET. The operational amplifier controls the gate of the MOSFET so that the potential at a current detecting resistor equals the output of the selector. As a result, a current proportional to the input voltage flows through the MOSFET. Because the current through a dividing resistor is also proportional to the input voltage, the total current is eventually proportional to the input voltage.

Abstract: The disclosure provides a voltage regulator for generating piece-wise linear regulated supply voltage. The voltage regulator includes a first clamp circuit that receives a reference voltage and an analog supply voltage. A second clamp circuit receives the reference voltage. A voltage divider circuit is coupled to the first clamp circuit and the second clamp circuit. The voltage divider circuit receives a peripheral supply voltage and generates a regulated supply voltage.

Abstract: Aspects of the disclosure provide a circuit for peak voltage detection. The circuit includes a diode-based peak detector and a compensation circuit. The diode-based peak detector has a first diode, and is configured to receive a signal for peak voltage detection and generate a first voltage of a stable level indicative of a peak voltage of the signal based on the first diode. The compensation circuit has a second diode. The compensation circuit is configured to receive the first voltage and generate a second voltage of a stable level that is independent of the first diode.

Abstract: An electronic circuit that changes a charge signal into a voltage signal within a sensor suitable for direct installation in a roadway can be connected to two single-core cables that need not be highly insulating yet can realize the required power supply of the electronics. The circuit includes an integrated impedance converter (IEPE) at the output to a two-core cable and a charge amplifier with an IC1 that has two inputs. A capacitor Cc is connected in series to the signal output of the sensor at one input of the IC1. A Zener diode D is arranged between the ground output of the sensor and the second input of the IC1 and can be supplied with power by a resistor R1 in conjunction with a power supply arranged on the output side in order to adapt the potential at the second input of the IC1.

Abstract: An adaptive low dropout voltage regulator (LDO) circuit having low power dissipation, and a method of regulating voltage while maintaining low power dissipation. Power dissipation in an LDO circuit is controlled and held to a low value using an LDO circuit that maintains a constant voltage difference between Vin and Vout; that is, ?V=Vin?Vout is approximately constant rather than linearly variable as a function of Vin. The output voltage Vout essentially tracks the input voltage Vin with an offset equal to ?V; Vout increases as Vin, but is kept between minimum and maximum voltage output specification limits.

Abstract: A novel integrated switched mode power supply circuit that provides supply voltages to an integrated circuit may be of minimal complexity and have the capacity for a wide range of input supply voltages. The novel power supply may include cascaded, unregulated step-down charge pumps (e.g. unregulated voltage splitters), one or more linear regulators coupled to the output of the cascaded voltage splitters, and a start-up current source to provide the IC supply current until the input supply voltage is sufficiently high for the voltage splitter(s) to be functional to provide the IC supply current. Furthermore, each voltage splitter may be activated or disabled depending on the value of the input supply voltage, and the input of a disabled voltage splitter may be shorted to its output via an integrated power switch. Using (cascaded) voltage splitters to provide the IC supply current reduces overall power dissipation in the IC.

Abstract: A constant current and constant power method and system for controlling current drawn from a voltage source uses an electronic load device such as one or more field effect transistors connected with the voltage source via a switch. The load device is configured as a resistance device. A constant resistance, a cutover voltage, and either a constant current or a constant power are set by the user for the voltage source. When the switch is closed, a fixed current is drawn from the voltage source to the load and the voltage from the source is measured. The measured voltage is compared with the cutover voltage. When the measured voltage is less than the cutover voltage, the current to the load is maintained in accordance with the measured voltage and the constant resistance. When the measure voltage exceeds the cutover voltage, the current to the load device is switched to a constant current or the load device is switched to constant power.

Abstract: A transmission line interface circuit includes a voltage regulator to control a voltage swing of the transmission line interface circuit for signal transmission. The transmission line interface circuit includes complementary driver elements, including a p-type driver element to pull up the transmission line in response to a logic high, and an n-type driver element to pull down the transmission line in response to a logic low. The voltage regulator is coupled between one of the driver elements and a respective voltage reference to reduce a voltage swing of the transmission line interface circuit.

Abstract: A power supply system includes a first connector, a second connector, a first circuit for detecting a magnitude of a current drawn from an energy source by the power supply system and providing a related output related, and a second circuit for adjusting an output voltage supplied to the second connector based on output of the first circuit. The output voltage supplied to the second connector is at a first value when the output of the first circuit is below a first threshold. Further, the output voltage supplied to the second connector is at a second value, greater than said first value, when the output of the first circuit is above a second threshold. The output voltage supplied to the second connector is at a third value, between said first and second values, when the output of the first circuit is between the first and second thresholds.

Abstract: A power supply circuit 1 includes an output circuit that generates an output voltage by performing a power supply operation based on an input voltage, an output terminal to which, after start-up of the power supply operation, the output voltage is applied, and a control circuit that causes a test current to flow between the output terminal and a ground. The control circuit detects, as a test voltage, a voltage at the output terminal in a test period in which the test current is caused to flow. When the test voltage at a predetermined judgment timing is lower than a judgment voltage, the control circuit judges that an output capacitor is connected and thus enables the power supply operation.

Abstract: A wireless adapter for use in a two-wire process control loop includes wireless communication circuitry and first and second terminals configured to couple in series with the two-wire process control loop. A regulator having a regulated input is coupled to the first terminal and an output. A shunt is coupled to the output of the regulator and is configured to provide power to the wireless communication circuitry. A feedback circuit is configured to control current flowing from the regulator to the shunt as a function of a loop current flowing through the two-wire process control loop.

Abstract: The present invention relates to a quick response power supply switching device. It also relates to a power supply network equipped with such a switch. The electrical power supply is connected to a set of blocks, the device comprises at least one switch (3) connecting the power supply (VDD) and the block (1), the value of the power supply current passing through the switch being controlled according to the difference between the power supply voltage (VDD) at the level of the other blocks and voltage threshold. The invention applies notably to all integrated circuits of recent technology in which it is important to reduce the leakage currents of the transistors in the unused circuit parts. The invention thus applies particularly to most systems powered by cell or battery and more particularly to portable telephone circuits.

Abstract: The present invention relates to a LCD module and a method thereof. The LCD module includes a gate driver, a liquid crystal display panel having a plurality of pixel units, a temperature sensor for generating a temperature sensing signal based on a temperature of the liquid crystal display panel, and a voltage regulator for adjusting scan voltage according to the temperature sensing signal. The gate driver outputs a scan signal with the adjusted scan voltage to the plurality of pixel units. The LCD module can adjust the scan voltage based on a variety of the temperature of the LCD panel to further change current charging the pixel units, shortening a response time period of the LCD module.

Abstract: The present invention discloses an on-time control module for compensating a switching frequency in a switching regulator. The on-time control module includes an average voltage generating circuit, for generating an average voltage related to a duty according to an input voltage and the duty, and an on-time controller, for generating a control signal of an on-time related to the duty according to the input voltage and the duty voltage.

Abstract: A novel fully integrated adjustable DC current reference is developed. The reference current is set by the ratio of a DC voltage generated using a band-gap reference and a tuned resistor based on an inductor reference. An AC signal is necessary to develop a relationship between the resistor tuned and the inductor reference. A computation unit which could be designed as an analog circuit is necessary to compute the value of the resistor in relationship to the reference inductor. Classic circuits are used to develop and analyze the relationship between the reference inductor and the tunable resistor that sets the DC current reference. Results show that the value of the inductance is insensitive to process, voltage and temperature variations. Therefore, assuming the DC bandgap reference voltage is insensitive to changes in process, voltage and temperature variations, so is the the DC current reference.

Abstract: An improved start-up (soft-start) circuit for use with voltage regulators, and an improved regulator start-up methodology. For example, an apparatus includes a voltage regulator circuit and a start-up circuit operatively coupled to the voltage regulator circuit. The start-up circuit is configured to provide a current signal, during a start-up period, that generates a reference voltage at a reference input of the voltage regulator circuit such that the reference voltage ramps up at a rate substantially equal to a ramp-up rate of a supply voltage coupled to the start-up circuit and the voltage regulator circuit.

Abstract: A constant-voltage power supply circuit includes a first transistor connected between a power supply terminal and an output terminal. The constant-voltage power supply circuit includes a voltage divider circuit including a first resistor having a first end connected to the output terminal and a second resistor having a first end connected to a second end of the first resistor and a second end connected to ground. The constant-voltage power supply circuit includes an output voltage control amplifier that compares the divided voltage and a reference voltage and controls a voltage of a control terminal of the first transistor. The constant-voltage power supply circuit includes a current-limiting characteristic control circuit that controls the voltage of the control terminal of the first transistor according to the divided voltage and an output current.

Abstract: An apparatus and method are provided for controlling circuit resistance values used for detection of a device in an inline powered system. The system comprises a source device, either a current source or a voltage source, associated with an inline power device. The system also comprises a resistance control circuit comprising a transistor having an emitter, a base and a collector, and a first resistor coupled between the emitter and the collector. In response to the resistance control circuit receiving a relatively low current from the source device, the transistor is configured to be in an off state so that current from the source device flows through the first resistor have a value selected in order to maintain a sufficient resistance during an inline power device detection mode.

Abstract: A voltage regulator is capable of continuously and smoothly preventing an inrush current independently of a startup characteristic of a reference voltage circuit. The voltage regulator is provided with an inrush current protection circuit composed of a constant-current circuit, a first transistor having the source thereof connected to the constant-current circuit and the gate thereof controlled by an output voltage detection circuit, a capacitor connected between the first transistor and the gate of an output transistor, a second transistor having the gate thereof connected to the drain of the first transistor and the source thereof connected to a power supply terminal, and a third transistor, which is connected between the second transistor and the output transistor and the gate of which is controlled by the output voltage detection circuit.

Abstract: A voltage regulator circuit comprising a first circuit functioning as a voltage dependent resistor, the first circuit having an input coupled to a voltage source and an output and having a resistance dependent on the voltage applied across the circuit by the voltage source such that the resistance increases as the applied voltage increases; and a regulator coupled to the output of the first circuit for providing a regulated output voltage.

Abstract: A current balance circuit includes a first and a second current sensors, an averager, a first and a second control modules, and a first and a second rheostat elements. The first and second current sensors receive a first current and a second current from a power source respectively and convert the first and second currents into a first and a second voltages. The averager receives the first and second voltages and calculates to obtain an average voltage. The first and second control modules receive the first voltage, the second voltage, and the average voltage, to obtain a first and a second control signals, to control current conduction ability of the first and second rheostat elements, to make the first and second currents keep a dynamic balance.

Abstract: A contact-input circuit for a power system device is described for processing a higher voltage signal from power system equipment or another power system device for use by a lower voltage circuit. The contact-input circuit generally includes a voltage threshold detection device adapted to allow current to flow therefrom when it detects that the higher voltage signal reaches a select threshold. An opto-isolator device, which is coupled to the voltage threshold detection device, provides a voltage signal suitable for use by the lower voltage circuit when the threshold detection device allows the current-flow through the opto-isolator.

Abstract: To provide a time constant circuit and the like capable of acquiring a characteristic of an output voltage that attenuates gradually after attenuating steeply, compared to a characteristic that attenuates monotonously. The time constant circuit includes: a series/parallel circuit formed by serially connecting a plurality of parallel circuits each formed with a resistance element and a capacitance element between a first terminal and a second terminal; and a voltage-dividing resistance element connected between a third terminal connected to the second terminal and a fourth terminal. A first parallel circuit is formed with a first resistance element and a first capacitance element, a second parallel circuit with a second resistance element and a second capacitance element, and an n-th parallel circuit with an n-th resistance element and an n-th capacitance element. Note that “n” is the number of the parallel circuits and it is an integer of 2 or larger.

Abstract: Systems and methods are provided for delivering energy from an input interface to an output interface. An electrical system includes an input interface, an output interface, an energy conversion module coupled between the input interface and the output interface, and a control module. The control module determines a duty cycle control value for operating the energy conversion module to produce a desired voltage at the output interface. The control module determines an input power error at the input interface and adjusts the duty cycle control value in a manner that is influenced by the input power error, resulting in a compensated duty cycle control value. The control module operates switching elements of the energy conversion module to deliver energy to the output interface with a duty cycle that is influenced by the compensated duty cycle control value.

Abstract: Memory power estimation by means of calibrated weights and activity counters are generally presented. In this regard, in one embodiment, a memory power is introduced to read a value from a memory activity counter, to determine a memory power estimation based at least in part on the value and a calibration, and to store the memory power estimation to a register. Other embodiments are also described and claimed.

Abstract: This document discusses, among other things, a device for providing a DC output voltage, including a first output voltage and a second output voltage, from an input voltage. The device can include a first voltage regulator configured to provide the first output voltage when the input voltage is below a threshold voltage, and a charge pump configured to provide the second output voltage from the first output voltage in a two-state mode when the input voltage is below the threshold voltage, and to provide the first output voltage and the second output voltage in a three-state mode when the input voltage is above the threshold voltage.

Abstract: Circuits and methods for paralleling voltage regulators are provided. Improved current sharing and regulation characteristics are obtained by coupling control terminals of the voltage regulators together which results in precise output voltages and proportional current production. Distributing current generation among multiple paralleled voltage regulators improves heat dissipation and thereby reduces the likelihood that the current produced by the voltage regulators will be temperature limited.

Abstract: A liquid crystal display device includes a back light assembly that emits light on a liquid crystal panel; and an inverter that controls brightness of the light emitted from the back light assembly according to a difference between video data of at least three frames that are sequentially inputted to the liquid crystal panel.

Abstract: As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a variation of a threshold voltage and mobility of a transistor. This invention provides an electric circuit which used a rectification type device in which an electric current is generated only in a single direction, when an electric potential difference was applied to electrodes at both ends of the device. Then, the invention provides an electric circuit which utilized a fact that, when a signal voltage is inputted to one terminal of the rectification type device, an electric potential of the other terminal becomes an electric potential offset only by the threshold voltage of the rectification type device.