Abstract: A circuit is operated by receiving an input reference signal at an input node, determining a scaling ratio based on the input reference signal, generating a digital input signal as a function of the determined scaling ratio, converting the digital input signal into an analog signal that is a scaled replica of the input reference signal, and providing the analog signal at an output node of the circuit and then, after a duration of time, coupling the input reference signal to the output node.

Abstract: A DC-DC auto-converter module includes a positive source terminal, a negative source terminal, a positive load terminal, a negative load terminal, and a DC-DC converter. The negative source terminal cooperates with the positive source terminal to facilitate electrical connection of a DC power source thereto. The negative load terminal cooperates with the positive load terminal to facilitate connection of an electrical load thereto. The isolated DC-DC converter comprises an input circuit and an output circuit that is galvanically isolated from the input circuit. The DC-DC converter includes a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal. At least one of the positive input terminal, the negative input terminal, the positive output terminal, and the negative output terminal is galvanically connected to at least one of the positive source terminal, the negative source terminal, the positive load terminal, and the negative load terminal.

Abstract: In accordance with an embodiment, a method of operating a transistor includes: switching the transistor on and off based on a control signal; monitoring a voltage of a collector node of the transistor; detecting whether the voltage of the collector node of the transistor is above a first threshold; and after detecting the voltage of the collector node of the transistor above the first threshold, regulating a voltage across a load path of the transistor to a first target voltage.

Abstract: An electric power converter is configured to perform conversion of power supplied from a power source. The electric power converter includes: a plurality of first capacitors connected in series between two lines to be used for supply of the power; and at least one second capacitor connected between a ground and a connection point between two first capacitors among the plurality of first capacitors.

Abstract: First to n-th (n is an integer of 2 or more) power conversion devices are connected in parallel to a load. First to n-th fuses are provided in first to n-th wirings, respectively. Each of the first to n-th power conversion devices includes a converter, an inverter, and a DC bus supplying a DC voltage from the converter to the inverter, and capacitors connected to the DC bus. An i-th (1?i?n?1) wiring includes the DC bus of an i-th power conversion device and the DC bus of an (i+1)-th power conversion device. The n-th wiring is connected between the DC bus of the n-th power conversion device and the DC bus of the first power conversion device.

Abstract: A multi-level switched capacitor boost inverter includes a series connection of a two-switched capacitor circuit, a source module and at least one one-switched capacitor circuit. Level-shifted pulse width modulation is used to apply gate pulses to the switches. The multi-level switched capacitor boost inverter uses only three capacitors and a single DC voltage source to generate thirteen voltage levels at load terminals with a voltage gain of three. The capacitors of the two-switched capacitor circuit are self-balancing. Additional one-switched capacitor circuits can be added in series with the inverter. Each additional one-switched capacitor circuit increases the number of levels and increases the gain by one.

Abstract: A method for generating a current set point value for a charging device connected to an electrical network includes measuring at least one electrical voltage, calculating a filtered voltage according to the measured voltage and a value of electrical pulsation of the electrical network, estimating a frequency and the amplitude of the measured voltage according to the at least one measured voltage and the at least one filtered voltage, calculating a consolidated voltage according to the measured voltage and the filtered voltage, and generating a current set point value according to the consolidated voltage and the estimated amplitude.

Abstract: For power converter pre-charge with line synchronization, a method magnetizes a power transformer of a power converter with a supply voltage from a variable voltage variable frequency supply. The method pre-charges power cells of the power converter fed from the power transformer to a specified voltage with the supply voltage. The method further modifies a primary amplitude, a primary phase, and a primary frequency of a primary winding of the power converter with the supply voltage to match a main amplitude, a main phase, and a main frequency of a main voltage of a main power source. In response to matching the primary amplitude, the primary phase, and the primary frequency to the main amplitude, the main phase, and the main frequency, the method connects the main power source to the power transformer.

Abstract: A control circuit for a resonant converter has a communication interface, a memory, and a primary switching control circuit. The memory provides a frequency setting signal capable of being programmed through a communication interface, the primary switching control circuit provides a first control signal to control a high-side switch and a second control signal to control a low-side switch. When the resonant converter works in an open loop mode, a frequency of the first control signal and the second control signal is determined by the frequency setting signal, an on-time period of the high-side switch equals an on-time period of the low-side switch, less than half of a resonant period.

Abstract: A polarity-selectable high voltage direct current power supply including a first drive assembly that transforms a first low voltage DC input into a first medium voltage alternating current output; a first HV output assembly that transforms the first LV AC output into a first HV DC output, wherein the first HV output assembly defines a first input stage; a polarity selector coupled between the second output junction of the first drive assembly and the first and second input stages of the first HV output assembly, the polarity selector operable between a first configuration and a second configuration; wherein in the first configuration the first HV DC output has a positive polarity; and wherein in the second configuration the first HV DC output has a negative polarity.

Abstract: Methods and apparatus for controlling a power converter are provided herein. For example, apparatus can include a series resonant circuit including transformer with a primary side winding directly coupled to a DC bridge drive and a control system connected to the series resonant circuit and configured to measure a voltage at the primary side winding for determining a bias signal that can be applied to a resonant capacitor voltage at a secondary side winding of the transformer for restoring a DC content of the DC bridge drive to about zero.

Abstract: A silicon carbide semiconductor device includes a diffusion protective layer provided below a gate insulating film, a gate line provided on an insulation film on the bottom face of a terminal trench and electrically connected to a gate electrode, the terminal trench being located more toward the outer side than the gate trench, a gate pad joined to the gate line in the terminal trench, a terminal protective layer provided below the insulation film on the bottom face of the terminal trench, and a source electrode electrically connected to a source region, the diffusion protective layer, and the terminal protective layer. The diffusion protective layer has first extensions that extend toward the terminal protective layer and that are separated from the terminal protective layer. This configuration inhibits an excessive electric field from being applied to the gate insulating film provided on the bottom face of the gate trench.

Abstract: A multi-phase power factor converter is disclosed. In embodiments, each phase of the power factor converter includes a voltage measurement circuit, a boost coil, a current measurement circuit, and a comparator. The voltage measurement circuit is configured to detect an input voltage. The current measurement circuit configured to detect a current in the boost coil. The comparator configured to compare the input voltage to the current in the boost coil, and a plurality of transistors (e.g., forming a MOSFET bridge) are driven by an output of the comparator.

Abstract: A switched mode power supply (SMPS) includes a filter, a power factor correction (PFC) circuit, and a control circuit configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit is configured to determine an AC input current based on a reactive current flowing through the filter and a PFC AC current. In further embodiments, the control circuit is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.

Abstract: A conversion apparatus includes: a conversion module having plural phases, each including a converter and a sensor, in which the plural phases are electrically connected in parallel, and a controller. The controller includes a first unit for determining a basic duty ratio common to all of the plural phases, so that an input or an output of the conversion module becomes equal to a target voltage or a target current, a second unit for determining a correction duty ratio and correcting the basic duty ratio for each of the plural converters, and a generator for generating the control signal based on the basic duty ratio and the correction duty ratio. The second unit determines the correction duty ratio based on a difference between plural phase currents respectively flowing in the plural converters. The basic duty ratio is equal to or greater than an absolute value of the correction duty ratio.

Abstract: A boost converter with high power factor includes a bridge rectifier, a divider and filter circuit, a capacitive adjustment circuit, an induction circuit, a multiplier, a power switch element, a PWM (Pulse Width Modulation) IC (Integrated Circuit), an output stage circuit, and a feedback circuit. The bridge rectifier generates a rectified voltage according to a first input voltage and a second input voltage. The divider and filter circuit generates a divided voltage according to the rectified voltage. The output stage circuit generates an output voltage. The feedback circuit generates a feedback voltage according to the output voltage. The multiplier generates a product voltage difference according to the divided voltage and the feedback voltage. The capacitive adjustment circuit is enabled or disabled according to the feedback voltage. The induction circuit selectively provides a compensation current according to the product voltage difference.

Abstract: A flyback converter includes a transformer, a sensing impedance, a switch and a control circuit. The sensing impedance is coupled between the transformer and an output terminal of the flyback converter. The switch is coupled to the transformer. The transformer is charged when the switch activates. The transformer is discharged when the switch deactivates. The control circuit is arranged to detect if the sensing impedance is bypassed, and further arranged to adjust an operating frequency of the switch when the sensing impedance is bypassed.

Abstract: A totem-pole single-phase PFC converter which controls low frequency-side node voltage to which an inductor is not connected into a linear shape within two poles of an AC power supply at a timing where a polarity of an input to the AC power supply is reversed.

Abstract: A switched mode power supply converter comprises a circuit pulse matching circuit configured to negate output voltage disturbance or noise during switching operation of a power conversion. The current pulse matching circuit input is driven by, or from, a power converter switch node of the switched mode power supply converter. The current pulse matching circuit comprises a rate-of-voltage change detection circuit driven by the power converter switch node.

Abstract: A DC capacitor and a leg are connected in parallel to a high-voltage-side power line and a low-voltage-side power line. The leg includes a plurality of semiconductor switching elements connected in series between the power lines with an output end, connected to a load, between the plurality of semiconductor switching elements. An attenuator for attenuating a resonance is connected to a main circuit loop formed of the DC capacitor, the high-voltage-side power line, the low-voltage-side power line, a semiconductor switching element in ON state, and a drain-source parasitic capacitance of a semiconductor switching element in OFF state.