Abstract: A power converter includes a switch control circuit for driving a high side switch of the power converter comprising the high side switch and a low side switch connected in series. The switch control circuit may have a first terminal for receiving a low side switch driving signal of the low side switch, a second terminal used as a reference ground terminal of the switch control circuit, and a third terminal used as an output terminal to provide a high side switch driving signal, the switch control circuit can draw power from the low side switch driving signal and may not require internal regulators that should sustain high voltage.

Abstract: In a power converter having a regulator and charge pump, both of which operate in plural modes, a controller receives information indicative of the power converter's operation and, based at least in part on said information, causes transitions between regulator modes and transitions between charge-pump modes.

Abstract: A dimmer circuit includes a light emitting module, a first current source, a digital-to-analog converter, a switch, a second current source and a pulse width modulation generator. The light emitting module is for emitting light according to a driving current. The first current source includes a first terminal coupled to a second terminal of the light emitting module. The digital-to-analog converter is for generating a DC voltage according to a DC dimming code signal to control the first current source. The switch includes a first terminal coupled to a second terminal of the light emitting module. The second current source includes a first terminal coupled to a second terminal of the switch. The PWM generator is for generating a PWM voltage according to the PWM dimming code signal to control the second current source.

Abstract: The present disclosure relates to a boost active bridge converter, which has particular, but not sole, relevance to a converter for an inductive or capacitive (wireless) power transfer system. According to an embodiment An AC-AC converter is presented. The AC-AC converter comprises a bridge circuit including at least two half-bridge converters, each half bridge converter comprising a first switch at an upper end and a second switch at a lower end, a capacitor connected to each half-bridge converter, the half bridge converters being connected to each other between the respective first switches and second switches thereof, the upper ends of each half bridge converters being connectable to a primary energy source, wherein the converter is operable to provide a controllable AC output.

Abstract: A counting circuit and a chip are disclosed. The counting circuit includes a charge counter module including a pulse processing module and a first capacitor. The pulse processing module is configured to covert a received pulse signal into a counting current and to transfer the converted counting current to the first capacitor. The first capacitor is configured to receive the counting current and store charge carried in the counting current. The counting circuit takes a voltage of the first capacitor as a basis for counting.

Abstract: In an embodiment a direct current to direct current (DC-DC) converter includes a first switching circuit configured to switch a supply of an input voltage to an energy storage circuit configured to generate an output voltage, a driving circuit configured to drive the first switching circuit according to a comparison between the output voltage and a comparison voltage and a soft-start circuit configured to raise the comparison voltage from a start voltage to a target voltage during a soft-start phase of the DC-DC converter having a soft-start duration, wherein the soft-start circuit comprises a soft-start capacitor configured to provide the comparison voltage during the start phase, the soft-start capacitor having a soft-start capacitance, an auxiliary capacitor having an auxiliary capacitance, a second switching circuit configured to alternately charge and discharge the auxiliary capacitor with an auxiliary current according to a clock signal having a clock frequency and a charging circuit.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to start converter into a pre-biased voltage. The disclosed methods, apparatus, systems and articles of manufacture provide an apparatus comprising: an error amplifier including a feedback network and a differential difference amplifier (DDA), the DDA coupled to a power converter, a voltage generator, and the feedback network coupled to the third input of the DDA, the fourth input of the DDA, and the output of the DDA; a multiplexer coupled to the voltage generator, the second input of the DDA, and the first input of the DDA; a first switch coupled in parallel to the feedback network; a second switch coupled to a delay cell and an oscillator; and a trigger including an output, the trigger coupled to the voltage generator, the power converter, and the output of the trigger coupled to the multiplexer, first switch, and the second switch.

Abstract: A constant on time converter control circuit and a constant on time converter are provided. The constant on time converter control circuit comprises an error amplifier, a voltage to current converter, and an initial current source. The error amplifier is for receiving a reference voltage signal and a feedback voltage signal and outputting a compensated voltage signal. The voltage to current converter receives the compensated voltage signal and outputs a converted current signal. The initial current source provides an initial current signal. The initial current signal and the converted current signal form a new reference voltage signal. A constant on time OFF time comparator receives the new reference voltage signal and the feedback voltage signal and outputs a control signal. The control signal affects the turning on and turning off of electronic switches to produce an output voltage of a constant on time converter.

Abstract: A voltage pulse generator comprising: circuitry controllable to generate a voltage pulse at an output of the circuitry; and an interruptor that monitors voltage at the output during a transition edge of the voltage pulse and interrupts a voltage change associated with the transition edge if the monitored voltage differs from a predetermined reference voltage by a predetermined amount.

Abstract: A current detection circuit includes an operational amplifier, a current sense amplifier including a first resistor and a second resistor, and a level shifter. The first resistor is provided between one end of a shunt resistor and a first input node of the operational amplifier. The second resistor is provided between the other end of the shunt resistor and a second input node of the operational amplifier. The level shifter controls voltages of the first input node and the second input node by controlling, according to a voltage at the one end of the shunt resistor, currents supplied to the first input node and the second input node.

Abstract: The present disclosure relates to a driver circuit for an optical light emitter of a ranging device, the driver circuit comprising: an inductor having a first of its nodes coupled to a current driver; a first branch comprising a first switch coupled between the second node of the inductor and a first supply voltage rail; a second branch for conducting a current through the optical light emitter, the second branch being coupled between the second node of the inductor and the first supply voltage rail; and a current sensor configured to detect the current passing through the inductor and to provide a feedback signal to the current driver.

Abstract: A compensator is described with higher bandwidth than a traditional differential compensator, lower area than traditional differential compensator (e.g., 40% lower area), and lower power than traditional differential compensator. The compensator includes a differential to single-ended circuitry that reduces the number of passive devices used to compensate an input signal. The high bandwidth compensator allows for faster power state and/or voltage transitions. For example, a pre-charge technique is applied to handle faster power state transitions that enables aggressive dynamic voltage and frequency scaling (DVFS) and voltage transitions. The compensator is configurable in that it can operate in voltage mode or current mode.

Abstract: GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Various embodiments of level shift circuits and their inventive aspects are disclosed.

Abstract: A method includes connecting an input voltage bus of a switched capacitor converter to a power source through a load switch, in a first short circuit testing step, determining whether the load switch or a second switch is shorted by comparing a voltage on the input voltage bus with a first predetermined voltage reference, after passing the first short circuit testing step, in a second short circuit testing step, determining whether a first switch or a fourth switch is shorted by comparing a voltage on the common node of the third switch and the fourth switch with a second predetermined voltage reference, and after passing the second short circuit testing step, in a third short circuit testing step, determining whether a third switch is shorted by comparing the voltage on the common node of the third switch and the fourth switch with a third predetermined voltage reference.

Abstract: A low drop-out (LDO) regulator includes a voltage-to-time converter (VTC) responsive to a reference voltage and an output voltage. The VTC generates a voltage pulse signal having: (i) a sign associated with a magnitude of the output voltage relative to a magnitude of the reference voltage, and (ii) a first pulse width proportional to a difference the output voltage and the reference voltage. A driving time-to-current converter (TIC) drives a gate node with a non-zero driving current proportional to the first pulse width of the voltage pulse signal. A slew adjusting circuit drives the gate node with a non-zero slew adjusting current, in response to the first pulse width of the voltage pulse signal being equal to or greater than reference time interval. A compensation TIC drives the output node with a non-zero compensation current having a magnitude proportional to the first pulse width of the voltage pulse signal.

Abstract: A switching control circuit for controlling a power supply circuit that includes an inductor receiving a rectified voltage corresponding to an AC voltage, and a transistor controlling an inductor current flowing through the inductor. The switching control circuit controls switching of the transistor, and includes an output circuit, a processing circuit and a drive signal output circuit. The output circuit sequentially receives a first voltage, which fluctuates at a frequency twice a frequency of the AC voltage, and outputs, as a second voltage, the received first voltage after a delay of a predetermined period of time. The processing circuit processes the first voltage based on a value corresponding to the second voltage, to remove a ripple component generated in an output voltage and contained in the first voltage. The drive signal output circuit outputs a drive signal for driving the transistor, in response to a processing result of the processing circuit.

Abstract: In some embodiments, an integrated circuit device includes multiple rows of functional cells, with each row having a cell height. At least one of rows of functional cells includes at least one digital low-dropout voltage regulator (DLVR) cell with the cell height for the row. The DLVR cell includes: an input terminal, an output terminal, a voltage supply terminal, a reference voltage terminal, and one or more pairs of transistors. Each pair of transistors are arranged in cascode configuration connected between the voltage supply terminal and output terminal. The gate of one of the transistors the cascode configuration is connected to the input terminal, and the gate of the other transistor in the cascode configuration is connected to the reference voltage terminal. The four terminals each comprises a metal track in the bottom metal layer and disposed within the cell height.

Abstract: A power conversion device having a multi-phase converter in which a plurality of chopper circuits each including a switching element and a reactor connected to the switching element are connected in parallel is provided. The power conversion device includes a single current sensor that is provided on a primary side of the chopper circuit, and detects a phase current flowing through each of the reactors when the switching elements are in both an on state and an off state, and a drift current detection unit configured to detect a drift current of a phase current in the multi-phase converter on the basis of the phase current detected by the current sensor, wherein the current sensor detects a phase current such that directions of phase currents flowing through each of the reactors are the same as each other.

Abstract: A method of signaling between a photovoltaic module and an inverter module. The inverter module is connected to the photovoltaic module. In an initial mode of operation an initial code is modulated thereby producing an initial signal. The initial signal is transmitted from the inverter module to the photovoltaic module. The initial signal is received by the photovoltaic module. The operating mode is then changed to a normal mode of power conversion, and during the normal mode of operation a control signal is transmitted from the inverter to the photovoltaic module. A control code is demodulated and received from the control signal. The control code is compared with the initial code producing a comparison. The control command of the control signal is validated as a valid control command from the inverter module with the control command only acted upon when the comparison is a positive comparison.

Abstract: A multi-input single-output circuit can include: a first circuit module configured to receive a first input voltage source, and including a first power switch; a second circuit module configured to receive a second input voltage source, and including a switching power converter, where the switching power converter comprises a second power switch; and a control circuit configured to control one of the first and second circuit modules to supply power for a load, or to stop supplying power for the load, according to states of the first and second input voltage sources and control parameters of the circuit module that is in operation.

Abstract: A display driver includes an amplifier circuit that outputs an output current based on a differential signal indicating a difference between a gradation voltage corresponding to a video signal and an output voltage to a source line of a display panel, thereby supplying the output voltage to the source line. An output current detection circuit generates a mirror current by copying the output current, and outputs an output current detection signal representing the mirror current. A failure determination circuit determines whether a failure is occurring or has occurred in the source line or not by comparing the level of the output current detection signal with a prescribed threshold value. The output current detection circuit includes a transistor that generates a mirror current by receiving the differential signal at a gate thereof, and a variable resistance that generates an output current detection signal upon receiving the generated mirror current.

Abstract: In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.

Abstract: A surgical device (10) includes a handle (122) and a rotatable assembly (130) coupled and rotatable with respect to the handle (122). The surgical device (10) further includes a switch (126) coupled to the handle (122) and having a plurality of positions. A first inductor (1122) is coupled to the switch (126) and a second inductor (1102) is coupled to the rotatable assembly (130). A current signal propagating through the first inductor (1122) and/or a current signal propagating through the second inductor (1102) changes based on a position of the switch (126).

Abstract: A voltage converter includes a capacitive voltage conversion circuit, an output capacitor, an inductor, a current detector, and a controller. The capacitive voltage conversion circuit includes switches, at least one flying capacitor, and an intermediate capacitor at an output portion. The current detector detects a current flowing in the inductor. The controller controls the switches in the capacitive voltage conversion circuit to change between at least two states by comparing the current flowing in the inductor to a threshold current.

Abstract: A power supply used to convert an input voltage into an output voltage, and the power supply includes an input detection circuit, a conversion circuit, a detection circuit, and a controller. The input detection circuit provides a power good signal or a power fail signal according to the input voltage. The conversion circuit converts the input voltage into an output voltage, and the detection circuit detects the output voltage according to the power good signal to accordingly provide an output feedback signal with a first feedback value. The controller stabilizes a voltage level of the output voltage according to the first feedback value. The detection circuit self-adjusts a feedback condition according to the power fail signal, and correspondingly adjusts the output feedback signal to a second feedback value according to the feedback condition. The controller reduces the voltage level of the output voltage according to the second feedback value.

Abstract: Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.

Abstract: In some examples, a circuit includes a resistor network, a filter, a current generator, and a capacitor. The resistor network has a resistor network output and is adapted to be coupled between a switch terminal of a power converter (104) and a ground terminal. The filter has a filter input and a filter output, the filter input coupled to the resistor network output. The current generator has a current generator output and first and second current generator inputs, the first current generator input configured to receive an input voltage and the second current generator input coupled to the filter output. The capacitor is coupled between the current generator output and the ground terminal.

Abstract: A switch-mode power supply includes a pair of input terminals, a pair of output terminals, and at least one switch coupled between the input terminals and the output terminals. The power supply further includes an analog-to-digital converter (ADC) for converting a sensed analog current value at the output terminals to an output digital value, an interface for receiving a user configurable current setting, and a control circuit coupled with the interface, the ADC and the at least one switch. The control circuit is configured to determine a raw digital value of the ADC that corresponds to the received current setting by processing an iterative loop, and turn on and turn off the at least one switch according to the determined raw digital value and the output digital value of the ADC, to supply an output current at the pair of output terminals that corresponds to the received current setting.

Abstract: Controller circuitry can employ a method to provide control signals to bridge switches operating an inductor for switched-mode inductive buck-boost voltage regulation. The buck mode can operate the bridge switches in a buck current control mode when the input voltage exceeds the output voltage. The boost mode can operate the bridge switches in a boost current control mode when the output voltage exceeds the input voltage. The buck-boost transition mode can operate the bridge switches in a peak buck-boost current control mode that minimizes a minimum duty cycle (having a minimum “on” duty time and a minimum “off” duty time) when the output voltage is approximately equal to the input voltage during a transition from at least one of the current control buck mode to the current control boost mode or from the current control boost mode to the current control buck mode.

Abstract: In at least some examples, an apparatus includes a logic circuit, first transistor, and second transistor. The logic circuit has a first logic circuit output, and a second logic circuit output. The first transistor has a first transistor gate, a first transistor source, and a first transistor drain, the first transistor gate coupled to the first logic circuit output, the first transistor drain adapted to couple to a voltage source, and the first transistor source coupled to a switching terminal. The second transistor has a second transistor gate, a second transistor source, and a second transistor drain, the second transistor gate coupled to the second logic circuit output, the second transistor drain adapted to couple to the voltage source, and the second transistor source coupled to the switching terminal, wherein a transistor width of the second transistor is larger than a transistor width of the first transistor.

Abstract: Hybrid power switching stages and driver circuits are disclosed. An example semiconductor power switching device comprises a high-side switch and a low-side switch connected in a half-bridge configuration, wherein the high-side switch comprises a GaN power transistor and the low-side switch comprises a Si MOSFET. The Si—GaN hybrid switching stage provides enhanced performance, e.g. reduced switching losses, in a cost-effective solution which takes advantage of characteristics of power switching devices comprising both GaN power transistors and Si MOSFETs. Also disclosed is a gate driver for the Si—GaN hybrid switching stage, and a semiconductor power switching stage comprising the gate driver and a Si—GaN hybrid power switching device having a half-bridge or full-bridge switching topology.

Abstract: A power supply, includes: a hot node coupled to a hot wire of an AC source, and a ground node coupled to an earth ground, where a neutral wire of the source is not present; a storage component, coupled to a return node and in series with a current limiter, where the current limiter enables the storage component to charge to a voltage while limiting leakage current to a prescribed value; a low voltage power supply including a buck-boost regulator, coupled to the storage component and to a return node that provides a reference voltage, where the low voltage power supply receives the voltage and generates an output voltage on an output node that is referenced to the reference voltage; and a wireless transceiver that employs the output voltage to transmit and receive messages from one or more corresponding wireless devices.

Abstract: A DC-DC converter includes a switch element connected to an input end, a coupling capacitor connected to the switch element at a first node, a first inductor connected to the coupling capacitor at a second node and connected to an output end at a third node, a control circuit that controls the switch element, a second inductor connected to the first node and a ground, a first diode connected to the second node and the ground, a smoothing capacitor connected to the third node and the ground, a comparator, a second diode connected to the second node and the comparator to supply a power voltage powering the comparator, and an output capacitor connected to the second diode and the ground. The comparator compares a voltage at the output end with a reference voltage so as to output a comparison result to the control circuit. This DC-DC converter operates stably.

Abstract: An adjustment circuit is connected between a power generation circuit that converts environmental energy into electric power and a power conversion circuit that converts the electric power generated by the power generation circuit into a desired form. The adjustment circuit includes a first circuit unit and a second circuit unit. The first circuit unit is configured to have an input connected to the power generation circuit and an output connected to the power conversion circuit. The second circuit unit is configured to have a connection point connected to the first circuit unit, a grounding point connected to a grounding electric potential, and a capacitor connected between the connection point and the grounding point. A magnitude of output resistance included in the second circuit unit is smaller than a magnitude of output resistance included in the power generation circuit.

Abstract: A mode-transition architecture for USB controllers is described herein. In an example embodiment, an integrated circuit (IC) controller includes a controller coupled to a slope compensation circuit, the controller to detect a transition of a buck-boost converter from a first mode having a first duty cycle to a second mode having a second duty cycle that is less or more than the first duty cycle. The controller controls the slope compensation circuit to nullify an error in an output caused by the transition. The controller can cause the slope compensation circuit to apply a charge stored in a capacitor during a first cycle to start a second cycle with a higher voltage than the first cycle.

Abstract: At least one power line is connected to a battery mounted at a vehicle. Plural ECUs are each connected to the at least one power line. A processor switches one ECU at a time of the plural ECUs from a second state to a first state by sending state switching signals to the plural ECUs. A power line to which plural ECUs are connected is a target power line. On the basis of current values of the target power line measured by a current measurement section when these plural ECUs are switched to the first state one at a time, the processor determines whether or not each ECU is in an abnormal condition.

Abstract: A power conversion circuit includes a first terminal, a second terminal, a first switching conversion unit, a second switching conversion unit, a flying capacitor and a magnetic element. The first switching conversion unit includes a first switch and a third switch. The second switching conversion unit includes a second switch and a fourth switch. The magnetic element includes two first windings and a second winding. A first one of the two first windings is serially connected between the flying capacitor and the second terminal. A second one of the two first windings is serially connected between the second switch and the second terminal. The second winding is serially connected with the flying capacitor and the first one of the two first windings. A turn ratio between the second winding, the first one of the two first windings and the second one of the two first windings is N:1:1.

Abstract: The invention relates to a high-voltage device (14) for a high-voltage application. The high-voltage dev ice comprises an electrically insulating housing (15), having a housing cover (16) that covers a housing interior (18), and covering means (10) for at least one electrical terminal (34) or electrical region to be protected from touching, which covering means are arranged in the housing interior (18). The covering means (10) have a protective cover (26). The protective cover covers the electrical terminal (34) or the electrical region, can be locked in a closed position by means of at least one locking element (30) and can be transferred into an open position by means of an opening operation.

Abstract: A power converter includes a first conversion circuit coupled to a first port, a second conversion circuit coupled to a second port, and a driver. The first conversion circuit has a first flying-capacitor coupled to a first network of switches, and two inductors both coupled to the second conversion circuit. The second conversion circuit has a second flying-capacitor coupled to a second network of switches. The driver drives the first and the second network of switches with a sequence of states having at least one of a first phase and a second phase. When the power converter operates as a step-down converter, the first phase charges the second flying-capacitor and the second phase discharges the second flying-capacitor. When the power converter operates as a step-up converter, the first phase discharges the second flying-capacitor and the second phase charges the second flying-capacitor.

Abstract: Optical touch sensors may be adversely affected by noise, such as modulated sunlight incident on the touch sensor. An analog optical detector is provided that includes a frequency dependent emitter feedback circuitry that does not substantially reduce the gain for a first modulation frequency range of the photodiode current and provides, for a second modulation frequency range of the photodiode current, a current feedback to reduce the gain of the first transistor. The second modulation frequency may include one or more expected noise modulation frequencies. A touch sensor device including a plurality of such optical detectors is also provided. Also provided is a touch sensor device comprising sampling disable circuitry operable to disable sampling of the output from the optical detectors for a duration of time.

Abstract: A system includes a first device, a second device, and a power control block. The first device has a first power converter and a first resonator which has a first resonant capacitor and a first coil. The second device has a second power converter and a second resonator which has a second resonant capacitor and a second coil. The second power converter is coupled to a ratio-controllable power converter, and the first coil and the second coil are magnetically coupled. The power control block is configured to adjust the system frequency, the second power converter output voltage and the current in the first coil in coordination.

Abstract: The present disclose relates to a multiphase power converter and control circuit and control method thereof. The multiphase power converter comprises a plurality of power stage circuits, and each power stage circuit corresponds to one control circuit, each of the control circuit comprises a first port and a second port, wherein the first ports are connected to each other to receive centralized control signal, and the second port is configured to identify a phase sequence of each phase. The control circuit adjusts a working state of the current power stage circuit by gating corresponding pulse in the centralized control signal according to the centralized control signal and a current phase sequence, thereby realizing an interleaved control of the multiphase power converter. The control method realizes a uniform interleaving of control signals of each phase efficiently and simply, and further improves a power density of the multiphase power converter.

Abstract: Methods and apparatuses for regulating a power converter are described. A device comprising a control circuit and a logic circuit can be integrated in a controller coupled to the power converter. The control circuit can generate a constant off-time signal based on a ramp signal and an error signal. The logic circuit can generate a control signal based on the constant off-time signal and a constant on-time signal. The logic circuit can output the control signal to the power converter. In response to an on-time period of the constant off-time signal being less than an on-time period of the constant on-time signal, the control signal can vary according to the constant on-time signal. In response to the on-time period of the constant off-time signal being greater than the on-time period of the constant on-time signal, the control signal can vary according to the constant off-time signal.

Abstract: A smart cell, comprising: a positive terminal; a negative terminal; a switching circuit which is arranged to select between a first switching state in which an energy storage device is connected between the positive terminal and the negative terminal and a second switching state which bypasses said energy storage device; an inductor provided between the positive terminal and the output of the switching network; and a controller arranged to monitor the voltage across the inductor and arranged to control a duty cycle of the switching circuit based on the magnitudes of voltage changes detected across the inductor. By monitoring and analysing the magnitude of voltage changes across the inductor, the controller determines the states of charge of other series connected smart cells without any communication between cells.

Abstract: A power circuit includes a switch circuit, an auxiliary load circuit coupled to an output terminal, a switching control circuit to operate the switch circuit responsive to an error signal, a regulator circuit having a sense resistor, a comparator to provide the error signal, and a DAC to control a sense current of the sense resistor. A DAC control circuit provides a DAC input signal having a controlled ramp rate responsive to a decreasing setpoint signal, a load control circuit selectively enables the auxiliary load circuit responsive to the decreasing setpoint signal and responsive to the error signal to control the power circuit slew rate.

Abstract: In an embodiment, a voltage converter includes: a first transistor coupled between an internal node and a first node receiving a supply voltage; a second transistor coupled between the internal node and a second node receiving a reference voltage; an inductance coupled between the internal node and an output node; a first circuit controlling the first and second transistors; and a second circuit configured to detect, when the first and second transistors are in the off state, when the voltage of the internal node is equal to the voltage of the output node, to condition a switching to the on state of the first transistor.

Abstract: A DC-DC converter includes a bridge circuit electrically connected to a DC link capacitor; an inductor and a capacitor electrically connected to the bridge circuit, in which the inductor is connected to a first end of a battery, and the capacitor is connected to the first end and a second end of the battery; a sensor configured to sense a voltage between the bridge circuit and the DC link capacitor; and a controller configured to control switching operations of the bridge circuit so that a power output by the DC-DC converter and supplied to the first end of the battery has a droop curve-shaped power value according to the sensed voltage.

Abstract: A pre-chargeable DCDC conversion circuit includes a high-voltage side conversion module connected to a primary winding of a main transformer T1, a low-voltage side conversion module connected to a secondary winding of the main transformer, and a controller used for controlling the high-voltage side conversion module and the low-voltage side conversion module. A pre-charging module is connected in series in a direct-current bus of the low-voltage side conversion module, and the pre-charging module is used for pre-charging a capacitor of electric equipment connected to a direct-current bus of the high-voltage side conversion module when the complete machine is powered on. The pre-charging module and a forward DCDC share most of power devices and power loops, and only a small number of devices are added, such that the volume and cost are reduced compared with an independent pre-charging branch, and the control mode is simple.

Abstract: Various embodiments disclose a method and a device. The device includes: an antenna; a switching regulator; a communication chip including an amplifier, a first linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a first voltage from the switching regulator, and a second linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a second voltage higher than the first voltage from the switching regulator, the communication chip configured to transmit a radio-frequency signal outside of the electronic device through the antenna; and a control circuit. The control circuit is configured to produce an envelope of an input signal input to the amplifier in connection with the radio-frequency signal and to provide the produced envelope to at least one of the first linear regulator or the second linear regulator.

Abstract: A multi-phase hybrid DC-DC converter using a switched-capacitor technique is described. The multi-phase hybrid converter can reduce the volt-seconds on the inductors of the converter, which can allow for a reduction in the size of the inductors. In addition, the multi-phase hybrid converter can utilize inductors as current sources to charge and discharge the flying capacitors, which can reduce the size of the mid capacitor and increase solution density. Because charging and discharging are performed by inductors, the multi-phase hybrid converter can eliminate the capacitor-to-capacitor charge transfer. As such, the multi-phase hybrid converter does not need high capacitance to achieve high efficiency operation, which can further increase solution density.