Abstract: The present disclosure relates to an energy supply device for providing an output voltage and an output current. The device includes a first operating state, a second operating state, a measuring assembly, and a signal generator. The measuring assembly is configured to sense a current amplitude of the output current of the energy supply device. The signal generator is configured to produce the output voltage and the output current. The signal generator is further configured to reduce a voltage amplitude of the output voltage of the energy supply device in the first operating state to change to the second operating state if the sensed current amplitude falls below a first current threshold value and to increase a voltage amplitude of the output voltage of the energy supply device in the second operating to change to the first operating state if the sensed current amplitude exceeds a second current threshold value.

Abstract: A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.

Abstract: Apparatus and method relating to voltage regulation is disclosed. In an apparatus thereof, an integrated circuit includes a first differential opamp having a first gain. The first differential opamp is configured to receive a reference voltage and a feedback voltage. A second differential opamp has a second gain less than the first gain. The second differential opamp is configured to receive the reference voltage and the feedback voltage. A driver transistor is configured to provide an output voltage at an output voltage node and to receive a gating voltage output from the second differential opamp. A differential output of the first differential opamp is configured for gating a current source transistor of the second differential opamp. A capacitor is connected to the driver transistor and the current source transistor.

Abstract: A switched-mode power supply and an associated television are disclosed. The switched-mode power supply includes a rectifier circuit, a transformer, a constant voltage control circuit, a power management circuit, and a constant current control circuit. An output terminal of the rectifier circuit is coupled both to a power detection terminal of the power management circuit and to a power input terminal of the transformer. A controlled terminal of the transformer is coupled to a control terminal of the power management circuit. A constant voltage output winding of the transformer is coupled through the constant voltage control circuit to a feedback input terminal of the power management circuit. A constant current output winding of the transformer is coupled to the constant current control circuit via an LED load. The solution of the present disclosure has the advantage of low cost.

Abstract: A method of performing a customer service operation with user interface (UI) element widgets is disclosed. The method comprises an application of an evaluation server receiving inputs that are responses to a survey of a user of a workstation. The method comprises the application determining a personality type and a technical ability level of the user. The method comprises the application receiving a request for a widget, wherein the widget provides the functionality to complete the user request that is related to an issue that the user wants to resolve. The application automatically selects a widget from a plurality of widgets based on the type of user request and the technical ability level of the user. The application then transmits the widget to the user.

Abstract: A control arrangement for use in controlling the electrical supply from a power supply unit including an internal capacitance. The control arrangement includes first and second magnetically linked inductors arranged in series with one another and defining a connection therebetween. Third and fourth magnetically linked inductors are each connected to the connection between the first and second inductors. A switch means provides switched connections between the third and fourth inductors and ground, and a controller is operable to control the operation of the switch means such that closing of a switch of the switch means results in the formation of an LCR circuit. The internal capacitance forms the capacitance of the LCR circuit and the third or fourth inductor form the inductance of the LCR circuit. The magnetic link between the third and fourth inductors allow an output to be generated from the other of the third and fourth inductors.

Abstract: In some examples, a method includes measuring, by a secondary controller, an output voltage and determining, by the secondary controller, a duration for a ringing time based on the output voltage. In some examples, the method further includes delivering, by the secondary controller, a non-enabling control signal to a secondary switch during the ringing time and measuring, by a primary controller, a duration of the ringing time. In some examples, the method also includes determining, by the primary controller, a duration for a charging time based on the duration of the ringing time and delivering, by the primary controller, an enabling control signal to a primary switch during the charging time.

Abstract: A high voltage power supply comprising a Line Powered Switcher module for converting a mains powered alternating current input to a direct current output and a High Voltage Switcher module for raising the voltage level of the direct current output. Both modules are independent switched mode power supplies and the high voltage power supply includes ripple, overcurrent and overvoltage protection as well as protection against electromagnetic interference.

Abstract: A method, electronic device, and computer-readable storage medium are provided for populating a calendar. In one embodiment, a method is provided for receiving tracking data regarding a delivery item, calculating an expected delivery date for the delivery item, identifying one or more deadlines associated with the delivery item, based on the tracking information, and automatically populating a user's calendar with the expected delivery date and the one or more deadlines.

Abstract: A control circuit for a switch mode power supply (SMPS) includes a power switch for coupling to a primary winding of the power supply and a startup resistor coupled to an external input voltage and to a control terminal of the power switch. The control circuit also includes a controller. During startup, the controller is configured to cause the power switch to amplify a startup current from an external input voltage through the startup resistor and provide a startup power to the controller. During normal operation, the controller is configured to provide a power switch control signal to turn on and off the power switch for controlling a current flow in the primary winding and regulating an output of the power supply. The controller is configured to provide a current signal for driving an NPN power switch and to provide a voltage signal for driving an NMOS power switch.

Abstract: A reactive power compensation apparatus includes one or more phase clusters each comprising a plurality of cells, and a controller controlling the one or more phase clusters. When at least one cell in a specific phase cluster among the one or more phase clusters is faulty, the controller controls a voltage of each cell in each of the remaining phase clusters except for the specific phase cluster to be controlled, using a modulation index.

Abstract: A power controller is provided. The power controller has a peak current setting unit utilized for deciding a peak current value according to a divided input voltage and a current limit turn-on time value. The comparator sends a first trigger signal once a current value of a power switch of the power system reaches the peak current value. The turn-on time calculation module defines the number of current limit operations by using the count of first trigger signals received in a calculation time period and then processes a recursive calculation to calculate a turn-on time value according to the current limit turn-on time value, the number of current limit operations, and a target number of current limit operations. The timer transmits a second trigger signal when the set turn-on time value is counted. The switch control module turns off the power switch when receiving one of the first and the second trigger signal.

Abstract: A first switch and a second switch connected in series to both terminals of a DC power source. A signal generation circuit generates a feedback signal based on the DC voltage detected by the voltage detection circuit, and outputs the feedback signal, the feedback signal for turning the first and second switches on and off. A burst oscillation circuit that generates a burst oscillation signal based on a feedback signal and turns the first switch element and the second switch element on and off based on the burst oscillation signal when the standby state is detected. The burst oscillation circuit comprises a capacitor and a rapid charge circuit. When this device returns from standby state to normal state, the rapid charging circuit charges the capacitor after the feedback signal exceeds the cancellation threshold voltage.

Abstract: A power compensation apparatus compensates for power of a power system to be allowed to transmit from at least one or more power sources to a load. The power compensation apparatus includes a first system connected to the power system to compensate for active power and reactive power of the power system, a second system connected to the first system to store power necessary for compensating for active power and reactive power, and a third system connected to the second system to generate the power to be stored in the second system.

Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.

Abstract: The low input voltage boost converter with peak inductor current control and offset compensated zero detection provide a boost converter scheme to harvest energy from sources with small output voltages. Some embodiments described herein includes a thermoelectric boost converter that combines an IPEAK control scheme with offset compensation and duty cycled comparators to enable energy harvesting from TEG inputs as low as 5 mV to 10 mV, and the peak inductor current is independent to first order of the input voltage and output voltage. A control circuit can be configured to sample the input voltage (VIN) and then generate a pulse with a duration inversely proportional to VIN so as to control the boost converter switches such that a substantially constant peak inductor current is generated.

Abstract: A distributed power system that is connected to a utility grid during both daytime and nighttime includes a plurality of power supplies including a solar array, a non-isolated DC-DC converter that has an input terminal and an output terminal and raises, at a predetermined step-up ratio, a DC voltage input from the power supplies via the input terminal and outputs the DC voltage via the output terminal, an inverter that converts the DC voltage output from the DC-DC converter via the output terminal into an alternating current, and a potential adjustment section that adjusts a potential at a negative electrode of the solar array to a potential higher than a potential at a negative electrode of the inverter at least during nighttime.

Abstract: A switching power supply includes a plurality of parallel branches, each parallel branch including two serially connected controllable switches and a coil connected between the two switches and an output node, a capacitor connected between the output node of the parallel branches and ground; and a controller configured to switch the two serially connected controllable switches of each parallel branch such that a first switch of a parallel branch is switched from a conducting state to a non-conducting state when a current flowing through a coil of the parallel branch reaches a first current value larger than 5 A, and such that the second switch is switched from a conducting state to a non-conducting state when the current flowing through the coil of the parallel branch reaches a second current value smaller than 0 A.

Abstract: A power converting device includes a first and a second power module electrically coupled in parallel, a loop current limiting circuit and a driving circuit. A first and a second terminal of the loop current limiting circuit are coupled to the first and the second power module respectively. A third and a fourth terminal of the loop current limiting circuit are coupled to each other. The loop current limiting circuit includes a coupled differential-mode inductor, a first inductive unit and a second inductive unit. A first winding and a second winding of the coupled differential-mode inductor are coupled to the first and the second power modules respectively. The first and the second inductive units are coupled to the first and the second power modules respectively. The driving circuit is configured to output a driving signal to the first and the second power module according to a current detecting signal.

Abstract: A regulator configured to provide at an output node a load current at an output voltage is described. The regulator comprises a pass transistor for providing the load current at the output node. Furthermore, the regulator comprises feedback means for deriving a feedback voltage from the output voltage at the output node. In addition, the regulator comprises a differential amplifier configured to control the pass transistor in dependence of the feedback voltage and in dependence of a reference voltage. The regulator further comprises compensation means configured to determine a sensed current which is indicative of the load current at the output node. Furthermore, the compensation means are configured to adjust an operation point of the regulator in dependence of the sensed current and in dependence of a value of a track impedance of a conductive track which links the output node to a load.