Abstract: A regulator is provided. The regulator is a PWM-based switching regulator with soft-start. The regulator starts up with non-synchronously-rectified regulation. A soft-start done signal is asserted after soft-start is finished. In one embodiment, the soft-start done signal is asserted at about 150% of the soft-start time. After the soft-start done signal has been asserted, the regulator changes from non-synchronously-rectified regulation to synchronously-rectified regulation if a pre-determined period of time occurs with no zero-crossing in the inductor current. In one embodiment, the pre-determined period of time is one switching cycle. In some embodiments, the “zero-crossing” of the inductor current is slightly different from zero, such as ?0.5 A.

Abstract: A phase-shifted PWM dc-to-dc converter includes a pair of switched half-bridges defining taps. The primary of an output transformer is coupled across the taps to receive AC, and produces transformed AC which is rectified and filtered to produce the output dc. Zero-voltage-switching (ZVS) is maintained over the full range from zero load current to maximum load current by the use of an auxiliary circuit including an “inverting” second transformer having primary and secondary windings serially coupled with capacitors. The primary-capacitor serial circuit is connected between a first half-bridge tap and reference potential, and the secondary-capacitor serial circuit is connected by an inductance between second half-bridge tap and a reference potential.

Abstract: The present invention is directed to an electrical wiring device that includes a cover assembly is coupled to the housing. The cover assembly includes at least one set of receptacle openings disposed on either side of a central portion of the cover assembly in communication with a portion of the plurality of receptacle terminals. A fault detection circuit is configured to provide a fault detection output in response to detecting a fault condition. A circuit interrupter is coupled between the plurality of line terminals and the plurality of load terminals. A light assembly is coupled to the plurality of line terminals or the plurality of load terminals. The light assembly has a light transmission region disposed in the central portion and occupying a substantial portion of a width of the cover assembly. The light assembly is selectively driven from a de-energizeci state to a light emitting state in response to a predetermined stimulus.

Abstract: Embodiments of detection circuitry are disclosed.

Abstract: A power supply module to power the control circuit of a switching mode power supply is provided. Based on the determination of whether the switching mode power supply is under a light or open load condition, the power supply module can dynamically provide the power to the control circuit of the switching mode power supply. Therefore, the performance of the power supply can be increased and the power loss can be decreased when the switching mode power supply is under a light or open load.

Abstract: A power supply device with a system switch circuit includes a primary power system, a stationary power system and a power management unit. The power management unit is triggered by a remote ON/OFF signal to generate a bias voltage power for turning on the primary power system after obtaining a stationary power. The system switch circuit is triggered by the remote ON/OFF signal to interrupt the stationary power system from obtaining an electric power path of an input power or a reference frequency signal to interrupt the stationary power, and triggered by the remote ON/OFF signal again to conduct the stationary power system to obtain the electric power path of the input power or the reference frequency signal to generate the stationary power, so as to achieve the effects of reducing a power loss as well as maintaining a normal operation of the power supply device.

Abstract: A power supply output voltage direct current (DC) offset detector determines a DC offset in a power supply output voltage signal, and the output voltage signal has a DC component and an alternating current (AC) “ripple” component. Once during each period of the ripple, the DC offset detector determines the DC offset from an output voltage signal using a comparison between the output voltage signal and a reference voltage. In at least one embodiment, from the comparison and during a period of the ripple, the DC offset detector determines an ‘above’ duration for which the ripple is above the reference voltage, determines a ‘below’ duration for which the ripple is below the reference voltage, or both to determine the DC offset of the power supply output voltage signal. The DC offset detector uses the above and/or below duration(s) to determine the DC offset of the output voltage signal.

Abstract: A circuit and method are provided for interrupting current flow into a voltage regulator from an output thereof when a voltage source (Vpwr) drops below an output voltage (Vout). In one embodiment, the circuit comprises: (i) a comparator supplied by Vout including an output and inputs coupled to Vpwr and Vout; and (ii) transistors coupled to and controlled by the comparator, including a first transistor configured to interrupt a first current path extending between Vout and Vpwr through an output-leg of the regulator when Vpwr drops below Vout. Preferably, the regulator includes a reference-leg and a feedback-circuit coupling Vout thereto, and the first transistor also interrupts a second current path between Vout and Vpwr through the feedback-circuit and reference leg. More preferably, the reference-leg comprises resistors through which it is coupled to ground, and the transistors include a second transistor to interrupt a third current path between Vout and ground.

Abstract: A voltage to current converter that can provide multiple current sources at differing voltage levels using a single inductor, without the need to provide a current sense element, pass element, and wiring to provide feedback for load current regulation. A switching inductor current is regulated such that the average current supplied by the inductor is equal to a user determined set point or points for a set of multiplexed loads. The inductor current levels are sampled and stored, and the average current level for each load is determined based on the sampled current levels. The average current levels are compared to a current level set point or set point signals to determine an error signal for each load current. The error signal for each current is amplified and filtered to provide duty cycle control terms. The duty cycle control terms are converted to pulse width modulated control signals by a pulse width modulator.

Abstract: An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit using an FB control unit is multiplied by k (0?k?1) by a multiplication unit and output to a first inverter control unit, and the remaining part is output to a second inverter control unit. The first and second inverter control units generate signals, based on command voltages obtained by superposing the AC command voltage from an AC output control unit on respective phase command voltages.

Abstract: A circuit includes a power converter configured to receive an input voltage and generate a regulated output voltage. The power converter includes an inductor. The circuit also includes a control loop configured to dynamically adjust a valley current limit of the power converter. The valley current limit identifies a minimum current through the inductor during a current-limited mode of operation. The regulated output voltage could be provided to a load configured to operate using the regulated output voltage. The control loop could be configured to dynamically adjust the valley current limit based on an average current through the inductor. The control loop could also be configured to dynamically adjust the valley current limit so that an output current reaches a desired average value during the current-limited mode of operation. The power converter could represent a buck converter, a boost converter, a buck-boost converter, or a hysteretic control power converter.

Abstract: A digital power supply controller is disclosed for controlling the operation of a switched power supply. The controller is contained within an integrated circuit package enclosing an integrated circuit chip. A plurality of inputs are provided on the package for interfacing with the switched power supply for receiving sensed inputs therefrom. A plurality of outputs provide switch control signals for turning on and off switches in the switched power supply. An integrated digital controller on the chip receives the inputs and generates the outputs, and includes an integrated instruction based processing engine for providing a portion of the digital control of the digital controller. A memory associated with the processing engine stores instructions for the processing engine.

Abstract: A magneto-electric-induction conversion system of a wireless input device includes an emitter and a receiver. A plurality of serially-connected resonant circuits, arranged side by side, makes resonance, so transmission energy is enhanced. An electromagnetic wave is transmitted via an inductive antenna, then received and converted by predetermined parallel-connected resonant circuits into an available power source, so that the energy is effectively delivered.

Abstract: A high voltage power supply method and apparatus is disclosed. An example power supply circuit includes a rectifier circuit coupled to receive an AC input voltage. A switchmode power converter circuit is coupled to the rectifier circuit to receive a rectified input voltage to generate a regulated output voltage. A switch is coupled between the rectifier circuit and the switchmode power converter circuit. A sense circuit is coupled to detect the AC input voltage. The sense circuit is coupled to turn off the switch when an absolute value of the AC input voltage exceeds a first threshold value. The sense circuit is coupled to turn on the switch when the absolute value of the AC input voltage is below a second threshold value.

Abstract: A single-board power supply structure and a method for providing a power supply are provided. An operational processor sends control signals capable of controlling the output of the power supply to a DC/DC converter. The DC/DC converter converts a received bus voltage into a required power supply voltage according to the received control signals. The operational processor may further monitor the output of the power supply and report the monitored result to a connected upper-layer machine, and may also control the sequence of a plurality of the outputs of the power supply converted by the DC/DC converter by controlling the time for sending the control signals. The structure and the method provided by the present invention can both uniformly, timely, and effectively monitor the output of the single-board power supply.

Abstract: A controller for controlling a plurality of DC-DC switching cells each configured to generate an output voltage in response to receiving a PWM control signal from the controller. The controller includes a plurality of output ports for outputting a plurality of PWM control signals, and at least one input port for receiving a plurality of output voltages from the plurality of switching cells. The controller is configured to sample the plurality of output voltages one at a time via a multiplexer and to regulate the output voltages in response to the sampling.

Abstract: Described herein are systems, methods and apparatuses for providing power to an irrigation controller. In one implementation, an apparatus comprises an alternating current (AC) to direct current (DC) voltage converter configured to convert an input AC voltage into a DC voltage. An AC voltage generator is coupled to the AC to DC voltage converter, wherein the AC voltage generator is configured to generate an output AC voltage using the DC voltage. The AC voltage generator is further coupled to the irrigation controller, and the AC voltage generator is configured to supply the output AC voltage to the irrigation controller.

Abstract: A voltage regulator is disclosed that includes first and second output transistors each outputting a current from the input terminal to the output terminal of the voltage regulator; and a control circuit part controlling the operations of the first and second output transistors to equalize a voltage proportional to an output voltage with a reference voltage. The control circuit part includes first and second error amplifier circuits each amplifying and outputting the difference between the proportional and reference voltages. The second error amplifier circuit consumes a smaller amount of current than the first error amplifier circuit. The control circuit part controls the output voltage by controlling the operations of the first and second output transistors using the first error amplifier circuit or controlling the operation of the second output transistor using the second error amplifier circuit in accordance with a control signal externally input to the control circuit part.

Abstract: There is disclosed a regulator for a charge pump having an input signal and generating an output signal at a value greater than the input signal. The charge pump comprises at least a capacitor and at least a device for charging and discharging the capacitor; the regulator comprises means having at the input said signal exiting the charge pump and a reference signal. Said means are able to generate a supply signal for said at least a device in response to the value of the difference between the output signal of the charge pump and said reference signal.

Abstract: A high efficiency control circuit for operating a switching regulator is provided. The switching regulator can regulate an output voltage no matter the input voltage is higher, lower, or close to the output voltage. The switching regulator has first, second, third and fourth switches. The control circuit can operate the switching regulator in buck mode, boost mode, or buck-boost mode. In a buck-boost mode, the control logic drives the four switches in an efficiency sequence for reducing energy consumption during the switch transition, on the other side, resistive loss owing to the energy transfer phase is also minimized. Furthermore, the invention is capable of control duty cycle limitation to fit the consideration of the linearity of the converter.