Abstract: A novel converter circuit topology is disclosed. The converter circuit has a bridge circuit, a transformer, and a half-bridge current-doubler rectifier. An input end of the bridge circuit is connected to an input voltage node of the converter circuit. A reference end of the bridge circuit is connected to an output voltage node of the converter circuit. Opposing ends of a primary winding of the transformer are connected to bridge nodes of the bridge circuit. A secondary winding of the transformer serves as current-doubler inductors of the half-bridge current-doubler rectifier. A tap of the secondary winding is connected to the reference end of the bridge circuit.

Abstract: A bandgap reference (BGR) circuit is provided. The BGR circuit includes a first node, a second node, and a third node. A first resistive element is connected between the second node and the third node. The BGR circuit is operative to provide a reference voltage as an output. The BGR circuit further includes a current shunt path connected between the first node and the third node, the current shunt path being operable to regulate a voltage drop across the first resistive element.

Abstract: A system for detecting current through a secondary winding of a switching voltage regulator without directly sensing the current through the secondary winding of the switching voltage regulator, the system including a diode; an inductor connected in series with the diode to form a current detection path, wherein the current detection path is connected in parallel with the secondary winding; a switching element connected in series with the current detection path and the secondary winding; and a controller operable to sense a voltage drop between a first terminal of the switching element and a second terminal of the diode, the voltage drop being indicative of the current through the secondary winding.

Abstract: The present invention generally relates to a modular high power bi-directional half bridge buck/boost converter assembly and, in particular, to a system for converting power from one form of current (either AC or DC) to a differing level of voltage, either lower (buck) or higher (boost), to output a wave signal based on pulse wave modulation (PWM) switching control by means of an external digital controller and methods of operation. In particular, an inverter-converter system includes at least one half bridge module including a plurality of circuit components, at least one inductor which is connected to the at least one half bridge module and a power supply, and a controller which is configured to receive and send instructions to the at least one half bridge module for converting an input voltage to an output voltage and dynamically tune switching frequencies based on a load of the inverter-converter system.

Abstract: A circuit includes a current sensor circuit having inputs and an output. The current sensor inputs are adapted to be coupled to inductor terminals a power converter. The current sensor circuit includes a tunable time constant circuit coupled between the current sensor inputs and the current sensor output. A time constant control circuit is coupled to a tunable time constant circuit, and is configured to tune the time constant circuit responsive to the current sensor output and another signal representative of inductor current. An adjustable gain circuit has a first input coupled to the current sensor output. A direct current resistance (DCR) control circuit has an output coupled to a second input of the adjustable gain circuit, and the DCR control circuit is configured to provide a gain adjust signal at the output thereof responsive to an average current of the inductor and a current command signal for the power converter.

Abstract: Multi-semiconductor SSPCs that solve bus level problems affecting systems as well as controller level problems affecting individual multi-semiconductor SSPCs are disclosed. Bus level and controller level problems adversely affect multi-semiconductor SSPCs and their associated systems. The disclosed multi-semiconductor SSPCs solve both bus level and controller level problems by implementing controlled rate-change of voltage (dv/dt) ramp-on rate, to ensure that the voltage on the input bus does not collapse when a multi-semiconductor SSPC is commanded closed and that a minimum amount of power is being dissipated evenly across the switching semiconductors.

Abstract: A power supply apparatus comprising a power input portion, a rectifying portion, a power conversion portion, a power output portion and an electrical filter is disclosed. The electrical filter is connected intermediate the rectifying portion and the power output portion for reduction of switching noise generated during power switching operations of the power switching circuitry. With such an arrangement, the electrical filter operates in the DC portion of the apparatus and power loss is significantly reduced while switching noise is suppressed nearer the source compared to conventional arrangement. In addition, switching noises due to stray or parasitic capacitance to the metal casing when the power supply is enclosed in a metallic casing to form a power supply module are also mitigated nearer the source.

Abstract: A driving circuit includes a first driving signal generator, a first voltage conversion circuit and a first switch. The first driving signal generator generates a first driving signal according a first input signal, wherein the first driving signal is a pulse width modulated signal. The first voltage conversion circuit is coupled between the first driving signal generator and a control terminal of a first power transistor, converts the first driving signal to an output driving signal by charges a capacitor and discharges the capacitor, wherein the output driving signal is output to the control terminal of the first power transistor. The first switch is couple with the first power transistor in series, and is controlled by a control signal to be turned-on or cut-off.

Abstract: System and method for controlling synchronous rectification. For example, the system for controlling synchronous rectification includes: a switch including a first switch terminal configured to receive a first voltage, the switch further including a second switch terminal and being configured to be closed or opened by a control signal; a voltage generator configured to receive a second voltage from the second switch terminal and generate a third voltage based at least in part on the second voltage; a filter circuit including a resistor and a capacitor, the filter circuit being configured to receive the second voltage from the second switch terminal and generate a fourth voltage based at least in part on the second voltage; a first comparator configured to receive the third voltage and the fourth voltage and generate a first comparison signal based at least in part on the third voltage and the four voltage.

Abstract: A method and apparatus for converting power comprising an input bridge having an input adapted for coupling to a DC source, a piezoelectric transformer having an input coupled to an output of the input bridge, and an output bridge having an input coupled to an output of the piezoelectric transformer and an output adapted to couple to a load. A trajectory controller, coupled to the input bridge and output bridge, (1) measures current and voltage in the input bridge, the output bridge or both, (2) measures a current into or out of the piezoelectric transformer, (3) determines switch timing for control signals for the input bridge and output bridge based upon the measured current and/or voltage, and (4) applies the control signals to the input bridge and output bridge.

Abstract: A short detection circuit includes a first transistor, a switched load circuit, a second transistor, a switched capacitor circuit, and a comparator. The first transistor is configured to conduct a load current. The switched load circuit is coupled to the first transistor. The switched load circuit is configured to switchably draw a test current. The second transistor is coupled to the first transistor. The second transistor is configured to conduct a sense current. The sense current includes first and second portions that are respectively representative of the load current and the test current. The switched capacitor circuit is coupled to the second transistor. The switched capacitor circuit is configured to generate a short detection voltage representative of the second portion. The comparator has a first comparator input coupled to the switched capacitor circuit. The comparator is configured to compare the short detection voltage to a short threshold voltage.

Abstract: A bootstrap gate driver charging circuit arranged to drive the gate of an upper switch (QU) and a lower switch (QL) connected in series to provide an AC output voltage (400) voltage by alternatively turning on and off according to a predetermined duty cycle of alternate upper switch turn-on and lower switch turn-on phases, the bootstrap gate driver charging circuit comprising: an input terminal; an output terminal; an H-bridge inverter with an inverter input and an inverter output; a charging path; and a bootstrap capacitor. The input inverter is electrically connected to the input terminal, the inverter output is electrically connected to a first end of the bootstrap capacitor, the charging path is electrically connected between a second end of the bootstrap capacitor and a gate driver supply voltage; wherein in response to the lower switch being turned ON and providing a path to ground with respect to the supply voltage.

Abstract: System and method for synchronous rectification of a power converter. For example, the system for synchronous rectification includes: a first system terminal configured to receive an input voltage; and a second system terminal configured to output a drive signal to a first transistor terminal of a transistor, the transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being connected to a secondary winding of the power converter, the power converter further including a primary winding coupled to the secondary winding; wherein the system is configured to: determine whether the input voltage becomes lower than a predetermined voltage threshold; and if the input voltage becomes lower than the predetermined voltage threshold, determine whether a time when the input voltage becomes lower than the predetermined voltage threshold is during or not during a demagnetization process of the secondary winding.

Abstract: A control device for a power conversion device includes a voltage recognizing unit configured to detect a voltage at a linkage point of the plurality of power converters, and a control unit configured to control an amplitude and a frequency of a voltage to be output by a power converter to be controlled on the basis of active power and reactive power output by the power converter to be controlled in a case that the power converter to be controlled is caused to perform autonomous operation as a voltage source, and controls active power and reactive power to be output by the power converter to be controlled so as to compensate for excess or deficiency of active power and reactive power at the linkage point on a basis of an amplitude and a frequency of the voltage detected by the voltage recognizing unit.

Abstract: A dual mode charge control method includes steps of: detecting an input voltage of the resonance tank, a resonance current of the resonance tank, an output current of the load, and an output voltage of the load; performing a single-band charge control when determining a light-load condition or a no-load condition of the load according to the output current; compensating the output voltage to generate an upper threshold voltage in the single-band charge control, and acquiring a resonance voltage by calculating the resonance current by a resettable integrator; comparing the resonance voltage and the upper threshold voltage to generate a first control signal; generating a second control signal complementary to the first control signal by a pulse-width modulation duplicator; providing the first control signal and the second control signal to respectively control a first power switch and a second power switch of the resonance circuit.

Abstract: A computational current sensor, that enhances traditional Kalman filter based current observer techniques, with transient tracking enhancements and an online parasitic parameter identification that enhances overall accuracy during steady state and transient events while guaranteeing convergence. During transient operation (e.g., a voltage droop), a main filter is bypassed with estimated values calculated from a charge balance principle to enhance accuracy while tracking transient current surges of the DC-DC converter. To address the issue of dependency on a precise model parameter information and further improve accuracy, an online identification algorithm is included to track the equivalent parasitic resistance at run-time.

Abstract: Measuring arrangement for determining the bridge currents of a switched electrical converter unit (2), in which, in a modulation process, at least two electronic half bridges (3, 3?) are switched with temporally offset actuation signals by a control unit (4), comprising a measuring unit (1) that is connected to current sensors (6, 6?), wherein the current sensors (6, 6?) are arranged in the output or input lines of the half bridges (3, 3?) in order to measure the bridge currents, and the measuring unit (1) is connected to the control unit (4) for temporal synchronisation, wherein the measuring unit (1) is designed to define measurement times (8, 8?) of the current sensors (6, 6?) which are temporally synchronised with the actuation signals of the half bridges (3, 3?), as well as an inverter arrangement having such a measuring arrangement.

Abstract: A conversion control circuit controls a power stage circuit of a switching power converter according to a first feedback signal and a second feedback signal, wherein the conversion control circuit includes an error amplifier circuit, a ramp signal generation circuit, a pulse width modulation circuit, and a quick response control circuit. The quick response control circuit performs a quick response control function, wherein the quick response control function includes: comparing the second feedback signal with at least one reference threshold to generate a quick response control signal; and when the second feedback signal crosses the reference threshold, adjusting a slope of a ramp signal according to the quick response control signal to accelerate an increase or decrease of the duty of a PWM signal, thereby accelerating the transient response of the switching power converter.

Abstract: A module includes: an electrically insulative housing; a driver circuit enclosed in the housing and configured to drive a control terminal of a power switch; a wireless communication circuit enclosed in the housing and configured to receive, through the housing, wireless control information transmitted to the module; and a wireless energy receiver enclosed in the housing and configured to receive, through the housing, energy wirelessly transmitted to the module, and to supply power to the driver circuit. The driver circuit is configured to drive the control terminal of the power switch based on the wireless control information received by the wireless communication circuit. A power electronic assembly that incorporates one or more of the modules and a corresponding power conversion control circuit are also described.

Abstract: A method for a phase-shifted full-bridge DC-DC converter. The method controls the DC-DC converter for energy transmission from a secondary side to a primary side of the DC-DC converter. A transformer is arranged between the primary side and the secondary side of the DC-DC converter. The method comprises a switching state, in which the terminals of the primary side of the transformer are electrically connected to one another, and in which, furthermore, the terminals of the secondary side of the transformer and the terminals of the secondary side of the DC-DC converter are electrically connected to one another.