Abstract: A linear regulator with a pass device having a first terminal, a second terminal and a drive terminal is presented. The first terminal of the pass device is coupled with the supply voltage of the linear regulator. The second terminal of the pass device is coupled with the output of the linear regulator. A driver stage is coupled with the supply voltage of the linear regulator, and the drive terminal of the pass device drives the pass device with a driving voltage. A compensating circuit compensates for a change in a voltage difference between the drive terminal of the pass device and the supply voltage of the linear regulator.

Abstract: A bridge circuit includes: a first leg including a first switching device and a second switching device connected between a first node and a ground; a second leg including a third switching device and a fourth switching device connected between the first node and the ground; and a first charge recycler connected between a gate of the first switching device and a gate of the third switching device, and configured to transfer charges accumulated in the first switching device to the gate of the third switching device prior to turning on the third switching device.

Abstract: A voltage converter control apparatus controls repetitive switching operations of a voltage converter, for conversion between a terminal voltage of a battery as an input-side voltage and a terminal voltage of a power inverter as an output-side voltage, by determining a command value of duty ratio of the switching in accordance with a command value of the output-side voltage. The voltage converter control apparatus sets a normal duty ratio range defining limit values of the duty ratio for normal operation of the voltage converter, with the limit values being determined based upon information including the command value of the output-side voltage.

Abstract: A method includes comparing a value of a current sense signal indicating an output signal of a power converter to a value of a threshold signal, adjusting a value of a first count signal in response to the comparison result, and determining whether or not the power converter is operating in an overload condition using the first count signal. A circuit includes an overload monitor comparing a value of a current sense signal to a value of a threshold signal, adjusting a value of a first count signal in response to the comparison result, and determining whether or not the power converter is operating in an overload condition using the first count signal. The circuit further includes an overload protection signal generator generating an overload protection signal indicating whether or not the power converter is operating in the overload condition.

Abstract: An AC-DC converter 1 has, e.g.: a primary winding 11 to which an alternating-current input voltage Vi is applied; a secondary winding 12 magnetically coupled with the primary winding 11; a bidirectional switch 20 connected in series with the primary winding 11; a resonance capacitor 30 connected in parallel with at least one of the bidirectional switch 20 and the primary winding 11; a resonance inductance component (e.g., a coil 120); a full-wave rectification circuit 40 performing full-wave rectification on an induced voltage appearing in the secondary winding 12; and a smoothing capacitor 50 smoothing the output of the full-wave rectification circuit 40. The alternating-current input voltage Vi is converted directly into a direct-current output voltage Vo, with both a forward voltage and a flyback voltage extracted from the secondary winding 12. The converter 1 further has a switch 200 switching the number of turns of the primary winding.

Abstract: The power supply apparatus includes an inductor; a switching element connected to another end of the inductor, the switching element configured to drive the inductor by being turned on or turned off in accordance with an input pulse signal; a boost converter circuit connected to both ends of the inductor and including a plurality of rectification units, the boost converter circuit configured to amplify a voltage generated in the inductor, each of the plurality of rectification units including a diode and a capacitor; and a voltage boosting element configured to supply a voltage obtained by boosting an input voltage to the inductor.

Abstract: Various examples described herein are directed to a differential controller including a first regulator and a second regulator. The first regulator receives a first regulator control signal and generates a first regulator output signal. The second regulator receives a second regulator control signal and generates a second regulator output signal. A load is electrically coupled between a first regulator output and a second regulator output. The load current and voltage are based on a difference between the first regulator output and the second regulator output. A current sensor generates a load current signal that describes a load current at the load. A first amplifier generates the first regulator control using the load current signal and a control signal. A second amplifier generates the second regulator control signal using the first regulator input voltage and a common mode voltage.

Abstract: A series regulator includes, for example, first and second operational amplifiers, for driving a first transistor for a heavy load and a second transistor for a light load respectively, and an amplifier control circuit. The amplifier control circuit controls the first and second operational amplifiers such that, in a light load region, a first output current passing through the first transistor has a zero value and a second output current passing through the second transistor covers the entire output current passing through a load, and such that, in a heavy load region, the second output current has a zero value (or a fixed value lower than an amplifier switching threshold value) and the first output current covers the entire output current (or a difference left by subtracting the second output current from the output current).

Abstract: A switching power source apparatus includes: a synchronous rectifier switching element for synchronous rectification constituted of an insulated-gate field-effect transistor; and a secondary-side control circuit including a detector circuit and a timer circuit. The secondary-side control circuit performs ON/OFF control of the synchronous rectifier switching element. The detector circuit monitors a voltage of a drain terminal of the synchronous rectifier switching element, and detects an abnormal state in which the voltage of the drain terminal is undetectable. The timer circuit starts up and measures a predetermined time in response to the detector circuit detecting the abnormal state. When the detector circuit detects the abnormal state, and the predetermined time elapses according to the timer circuit, the secondary-side control circuit outputs a detection signal indicating an abnormality to outside.

Abstract: Voltage regulators with fast transient response are provided herein. According to one aspect, a voltage regulator for accepting an input voltage (VREF) and producing an output voltage (VouT) includes an operational amplifier having as a first input (VREF) and having as a second input a feedback voltage (VFB); an output amplifier having an input coupled to the output of the operational amplifier and an output that produces VOUT, the output being coupled to a feedback path that produces VFB; a compensation capacitor (Cc) connected between the output of the output amplifier and an input to a buffer amplifier that supplies a voltage to the input of the output amplifier. The buffer amplifier has a transconductance (gmBUF) that is controlled to be proportional to a load current (ILOAD), thereby causing the left hand plane zero of the buffer amplifier to cancel the pole created by the output amplifier.

Abstract: An input voltage control device including a first power line inputted with a voltage of 300V to 380V and a second power line inputted with a voltage of 0V. The potential difference between the first power line and the second power line is variable. A constant voltage generator outputs a constant potential voltage of (24V, for example) to a third power line. A reference potential generator outputs a reference potential of (10V, for example). A comparative potential generator outputs a comparative potential which is within the range of (0V to 24V, for example), based on the input voltage. A comparator outputs to an NMOS transistor a conducting potential voltage of (24V, for example) or an interrupting potential voltage of (0V, for example) depending on the comparison between the reference potential and the comparative potential. When the comparator outputs the conducting potential, the path between the source and drain of the NMOS transistor is made conductive.

Abstract: A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to a common output node. Each of the phase units may be configured to source current to the output node in response to the assertion of a respective clock signal in order to generate a regulated supply voltage. Each phase unit includes a respective transconductance amplifier configured to generate a respective demand current dependent upon a reference voltage and the regulated supply voltage.

Abstract: A power conversion controller for electric train in one aspect of the present disclosure includes an active current command value generator, an overhead line voltage detector, an initial value calculator, an adjustment value calculator, an upper limit value setter, and an output limiter. The output limiter outputs a reactive current command adjustment value calculated by the adjustment value calculator as a reactive current command value when the reactive current command adjustment value is equal to or lower than an upper limit value set by the upper limit value setter, and outputs the upper limit value as the reactive current command value when the reactive current command adjustment value exceeds the upper limit value.

Abstract: A power converter including a transformer (Tr) with a primary and a secondary, and a capacitor (Cr) and an inductor (Lr) serially connected with the primary of the transformer. The capacitor, the inductor and a magnetizing inductor (Lm) of the transformer form an LLC resonant circuit. The power converter further including a first current sensor (CT1) and a second current sensor (CT2). The first current sensor including the inductor and is configured to sense, via the inductor, a current passing through the primary of the transformer. The second current sensor including the primary and is configured to sense, via the primary, a current passing through the magnetizing inductor of the transformer. A current passing through the secondary is determined from a difference obtained based on the sensed current passing through the primary of the transformer and the sensed current passing through the magnetizing inductor.

Abstract: In a case where a switching element of an inverter does not operate properly due to failure or the like, a three-phase short circuit cannot be made, and an induced voltage cannot be suppressed. An induced voltage suppression device is electrically connected to the three-phase wiring between the power converter and the motor, in parallel to the power converter. A rectification circuit including a three-phase diode bridge circuit. A DC voltage source including a capacitor. A voltage detection circuit detects a voltage of both ends of the DC voltage source. In a short circuit, when a transistor of the voltage detection circuit is turned on, transistors are turned on to perform three-phase short-circuit operation to suppress an induced voltage of the motor. Since the induced voltage suppression device secures a DC voltage by the induced voltage of the motor as a drive source in a self-excited manner, it is possible to suppress the induced voltage even when an abnormality occurs in the power converter.

Abstract: A switching power supply includes a power converter with an inductor and first and second switches that converts a voltage Vac to a voltage Vdc, a detector with a winding that detects zero timing of an inductor current, and a driving signal generator that switches on the second switch based on the zero timing and then switches on the first switch. The driving signal generator ends a period T2 before the zero timing by executing a measuring process for an on period T1 of the second switch, a process that calculates the period T2 from T2=T1×|Vac|/(Vdc?|Vac|)?Tc using a correction time Tc, a process that switches on the first switch for only the period T2, a process that measures an elapsed time between the periods T2 and T1, and a process that changes the correction time Tc so that the elapsed time becomes a target time.

Abstract: A converter station for the transmission of electrical power has a diode rectifier with a DC terminal and an AC terminal. At least one transformer is connected to the AC terminal. In order to render the converter station as compact as possible, the diode rectifier is arranged in an insulating material.

Abstract: A system and method are provided for controlling a modified buck converter circuit. A pull-up switching mechanism that is coupled to an upstream terminal of an inductor within a modified buck converter circuit is enabled. A load current at the output of the modified buck regulator circuit is measured. A capacitor current associated with a capacitor that is coupled to a downstream terminal of the inductor is continuously sensed and the pull-up switching mechanism is disabled when the capacitor current is greater than a sum of the load current and an enabling current value.

Abstract: A discrete-time current sense circuit includes: a current mirror circuit, which includes: a power switch, for providing the communication current; and a sampling switch, which is for sampling the communication protocol current in a sampling period in a discrete manner, to generate a sampling current; a bias circuit, for providing a reference voltage to the reference node in the sampling period according to a communication protocol voltage of the communication protocol voltage node; a signal conversion circuit, for generating the discrete-time current sense signal according to the sampling current; and a first switch, for operating to determine the sampling period; wherein the sampling period is part of a complete period in which the power switch provides the communication protocol current.

Abstract: An electronic control apparatus is used for a power supply system that includes a rotating electric machine, a power generation control unit, first and second storage batteries, first and second switches, and a host control unit. The electronic control apparatus determines whether a predetermined process completion condition is met, without communicating with the host control unit, after an ignition switch of a vehicle is switched from an on state to an off state. The process completion condition indicates that a predetermined switch-off process is completed. The switch-off process is performed by the power generation control unit after the ignition switch is switched from the on state to the off state. The electronic control apparatus maintains the first switch in on state until determined that the process completion condition is met after the ignition switch is switched from the on state to the off state.