Abstract: A fault-tolerant multiphase voltage regulator includes a plurality of power stages, each of which is configured to deliver a phase current to a processor, and a controller. The controller is configured to: control the plurality of power stages to regulate an output voltage provided to the processor; detect and disable a faulty power stage; generate a throttling signal to indicate if one or more of the power stages is faulty and disabled; and communicate the throttling signal to the processor over a physical line running between the processor and the controller. A corresponding method of operating a fault-tolerant power distribution system is also described.

Abstract: When short-circuit between DC lines is detected, a control device of a power conversion device performs protection control to turn off semiconductor switching elements in a power converter, and when elimination of the short-circuit between the DC lines is detected, the control device performs restart control of the power converter by giving a voltage command value for causing negative-polarity current in flowing through a diode in an upper arm of a second series body of a second converter cell to flow to a phase arm 4, to each converter cell in first and second arms.

Abstract: A device controls a load flow in an alternating-voltage network. The device is distinguished by a module series circuit of two-pole switching modules that can be inserted in series into a phase line of the alternating-voltage network. Each switching module has an energy store and controllable power semiconductors that can be switched on an off and each switching module can be controlled in such a way that a switching-module voltage can be produced at the poles thereof, which switching-module voltage corresponds to a positive or negative energy-store voltage or a voltage having the value of zero. A control apparatus for controlling the switching modules is provided, which control apparatus is configured to control the switching modules in such a way that a periodic longitudinal voltage can be produced at the module series circuit. A method for controlling a load flow in an alternating-voltage network is performed by the device.

Abstract: A flyback converter control architecture is provided in which primary-only feedback techniques are used to ensure smooth startup and detection of fault conditions. During steady-state operation, secondary-side regulation is employed. In addition, current limits are monitored during steady-state operation using primary-only feedback techniques to obviate the need for a secondary-side current sense resistor.

Abstract: A method for operating an unbalanced load manager for a three-phase induction motor or heater, includes receiving, by a load manager, values representative of current flow sensed by current sensors and voltages sensed by voltage taps corresponding to phases of a three-phase power system providing power to the motor or heater. The method includes detecting, by the load manager, a transition from positive or negative to zero current, to measure a phase shift between line-to-line and current. The method further includes synchronizing, by the load manager, firing from line-to-line signal to line-to-neutral signal of phases of the three-phase power system, using the measured phase shift between line-to-line and current.

Abstract: A low drop-out (LDO) regulator including a first operational amplifier, a first transistor, a second transistor, a voltage feedback circuit and a charge pump is disclosed. Each of the first transistor and the second transistor is coupled between supply voltage and an output voltage. The first operational amplifier outputs a first gate-controlled voltage to turn the first transistor on or off. A second gate-controlled voltage is provided to the second transistor to turn it on or off. The charge pump makes the second gate-controlled voltage equal to the sum of the output voltage, a threshold voltage of the second transistor and a drive voltage of the second transistor. The voltage feedback circuit provides a feedback voltage to the first operational amplifier. The first gate-controlled voltage is positively correlated to the feedback voltage. The first transistor is a P-channel field effect transistor; the second transistor is an N-channel field effect transistor.

Abstract: A power system including a first drive including a first drive output, a second drive including a second drive output, wherein the first drive output is larger than the first drive output, at least one inductor operably coupled to the first drive and the second drive, and a load operably coupled to the system output.

Abstract: The combined voltage regulator and snubber circuit generally has a voltage regulator device in parallel with the energy storage element of the snubber circuit operatively connectable in series with a leakage inductance current path; the leakage inductance being part of a magnetic component utilized in a switch-mode power supply having an input voltage source, controllable semiconductor switches, freewheeling semiconductor switches, feedback controller, reactive energy storage components and a load; the voltage regulator generally providing constant or variable voltage to the gate driver of the controllable semiconductor and/or feedback controller; the snubber circuit generally recycling leakage inductance energy to the input capacitor of a neighboring cell in a multi-cell stacked converter.

Abstract: A multi-phase buck voltage regulator includes first and second buck converters, first and second low pass filters, and a current balancing loop circuit. The first buck converter includes a first pair of power transistors and a first switch node. The second buck converter includes a second pair of power transistors and a second switch node. The low pass filters are coupled to their respective switch nodes. The current balancing loop circuit receives a filtered output of each filter. The current balancing loop generates a current balancing current signal to control a gain of a first voltage-to-current converter for the second buck converter. The duty cycle of the second buck converter is thereby adjusted, which in turn adjusts a current of the second buck converter to become closer to a current of the first buck converter.

Abstract: A programmable-threshold power supply selector has two power-supply inputs VDD1 and VDD2. The higher of these two voltages is pre-selected as a common supply that powers all transistors and circuitry in the programmable-threshold power supply selector, including substrates under transistors. An open-loop decision circuit is very stable since it uses no feedback. A tunable voltage divider divides VDD1 by a programmable divisor. The divided VDD1 is compared to a reference voltage to generate switch-control signals. The switch-control signals drive the gates of p-channel switch transistors that connect either VDD1 or VDD2 to an output supply voltage. The different programmable divisor values effectively cause VDD1 to be compared to a programmable threshold voltage VTH. The switch transistors switch the output supply voltage to VDD2 only when VDD1 falls below VTH. The output supply voltage remains at VDD1 even when VDD1 falls below VDD2, eliminating unnecessary power switching.

Abstract: A solar power generation system includes an inverter configured to convert DC power inputted from a solar battery to AC power, a MPPT control section configured to perform maximum power point tracking control on the inverter, an input power measurement section configured to measure the DC power inputted to the inverter at a time of avoiding a transient state due to variation in DC voltage of the inverter by the maximum power point tracking control, an output power measurement section configured to measure the AC power outputted from the inverter at the time of avoiding the transient state, and a conversion efficiency computation section configured to compute conversion efficiency of the inverter based on the DC power measured by the input power measurement section and the AC power measured by the output power measurement section.

Abstract: An apparatus for producing unvarying direct load current comprises a DC voltage source, a direct-voltage-to-pulse-voltage converter (DCPVC), a pulse-voltage-to-direct voltage converter (PDCVC), a DC stabilizer, and a load connected by one of its terminals to an output of the PDCVC and by another terminal to an input of the DC stabilizer, and a control circuit connected by one of its inputs to one of the terminals of the load, by another input to an output of the direct current stabilizer, and by an output to a control input of the DCPVC. As the load varies, a stabilizing voltage at the DC stabilizer is formed, and a direct load current, unvarying in a wide range of load variations, is produced.

Abstract: A circuit generates an output voltage from an input voltage and includes a Pulse Width Modulation (PWM) controller. The PWM controller initiates a PWM pulse according to a first comparison that uses a Current Sense and Ramp (CSR) signal and an error signal. The PWM controller ends the PWM pulse according to a second comparison that uses the CSR signal and a threshold signal. The CSR signal is generated using a current sense signal and a ramp signal according to the input voltage. The error signal is generated from the output voltage and a reference voltage. In an embodiment, the circuit is one of a plurality of substantially identical modules, wherein one module is a master module. The master module generates an error signal used by each module. A clock input of each module is respectively connected to a clock output of another module to sequentially activate each of the modules.

Abstract: A reference voltage generator includes a voltage generation circuit, an amplifier, a diode unit and a transistor. The voltage generation circuit includes an output terminal for outputting a reference voltage, a first terminal having an operational voltage, and a second terminal. The amplifier includes an input terminal coupled to the first terminal of the voltage generation circuit, an output terminal, a first terminal coupled to a first voltage terminal, and a second terminal. The diode unit includes a first terminal coupled to the second terminal of the amplifier, and a second terminal coupled to the second terminal of the voltage generation circuit and a second voltage terminal. The transistor includes a first terminal coupled to the first terminal of the amplifier, a second terminal coupled to the output terminal of the voltage generation circuit, and a control terminal coupled to the output terminal of the amplifier.

Abstract: Various examples are directed to a converter system comprising first and second series-connected converter modules and a synchronization circuit. The synchronization circuit may modulate a reference signal onto a carrier signal to generate a synchronization current signal and the synchronization current signal to an output current of the converter system to generate an aggregated output current. A first converter module may receive the aggregated output current from a first current sensor and generate a first reproduced synchronization signal at least in part from the aggregated output current. A first switch control signal for switching at least one switch at the first converter may be generated based at least in part on the first reproduced synchronization signal.

Abstract: Implementations of on-chip electrical regulation devices may include: a positive power domain electrically coupled with a negative power domain through a power mesh including two or more loads. The positive power domain, negative power domain, or both the positive power domain and negative power domain may each include a power domain rail. The power domain rail may include a resistance distributed along a length of the power domain rail. The distributed resistance may be electrically coupled with one or more transistors also distributed along the power domain rail. Each of the one or more transistors, in combination with the distributed resistance, may be configured to dissipate electrical power along the length of the power domain rail to reduce a voltage across the positive power domain, negative power domain, or both the positive power domain and the negative power domain to a desired operating voltage at the power mesh.

Abstract: The present disclosure relates to the field of intelligent wearable technologies, and provides a power supply circuit, a power supply circuit generation method, and a power supply circuit control method. The present disclosure provides a power supply circuit, including: a bandgap voltage reference Bandgap, a real-time detection and control module, and an alternate voltage source module, where the real-time detection and control module adjusts an output point voltage of the alternate voltage source module according to an output voltage of the Bandgap; and when the output point voltage of the alternate voltage source module reaches a target voltage, the real-time detection and control module closes the Bandgap and supplies power by using the alternate voltage source module.

Abstract: Circuits and methods are provided for supplying power to a transformer of a switching DC/DC voltage converter within a power converter. The power converter includes separate nodes that can potentially supply such power. A first of these nodes is coupled, typically directly and with no energy-storing bulk capacitor, to a rectifier that supplies rectified power from an alternating current power source. A second node is also supplied power from the rectifier, but is coupled to a bulk capacitor that can store and supply energy as needed. The techniques disclosed herein use the first node to supply power to the transformer when feasible, and use the second node, and its associated bulk capacitor, to supply power otherwise. In so doing, the energy storage requirements of the bulk capacitor may be reduced, meaning that the capacitance and associated size of the bulk capacitor may be reduced relative to other power converter circuits.

Abstract: A power supply device includes a DC power supply circuit to output a DC voltage, an AC power supply circuit to generate an AC voltage, and a power supply control circuit to control the DC power supply circuit and the AC power supply circuit. The AC power supply circuit outputs a superimposed voltage in which the DC voltage is superimposed with the AC voltage. The power supply control circuit controls the DC power supply circuit to output the DC voltage according to a DC output value corresponding to the AC voltage.

Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.