Abstract: A power supply as described herein includes a voltage converter, main controller, and a bias controller. The voltage converter including a primary stage and a secondary stage. The controller is operable to control regulation of an output voltage from the secondary stage based on a received feedback signal. As its name suggests, the output voltage from the secondary stage powers a load. During certain load conditions, the bias controller maintains (via novel biasing) a magnitude of a power supply voltage above a bias threshold value. More specifically, the bias controller is operable to prevent the power supply voltage from falling below the bias threshold value, preventing an under voltage lockout condition such that the controller is able to quickly continue conveyance of sufficient energy from the first stage to the second stage when the load increases a rate of consuming power provided by the output voltage.

Abstract: A controller for use in a power converter comprising a request control circuit coupled to receive a feedback signal representative of an output of the power converter. The request control circuit is coupled to generate a request signal for controlling a power switch. The request signal can include a synchronization signal in response to the feedback signal and a jitter average signal. The synchronization signal is generated by the request transmitter circuit and corresponds to an average on time for controlling the power switch.

Abstract: The present application is directed to a display device and an over-voltage protection method. As an example, the display device includes a power source assembly and an electric load. The power source assembly includes an LLC circuit, a transformer and a feedback circuit. An input end of the transformer is connected with a control end of the LLC circuit, a first output end of the transformer is connected with a supply end of the LLC circuit, a second output end of the transformer is connected with the electric load, and the transformer is configured to supply power to the LLC circuit and the electric load. A first end of the feedback circuit is connected with the second output end of the transformer, a second end of the feedback circuit is connected with the feedback end of the LLC circuit and the feedback circuit is configured to supply a voltage derived from the second output end of the transformer to the LLC circuit.

Abstract: An apparatus for zero voltage switching includes a ZVS assist circuit connected between a switching node and a negative connection of a converter. The switching node is located between first and second switches of a switching leg of the converter. The converter is fed by a constant current source and feeds a constant current load. The ZVS assist circuit includes a ZVS inductance, a first ZVS switch that allows current through the ZVS inductance to change a voltage of the switching node to a condition for zero voltage switching of the first switch of the switching leg, and a second ZVS switch that allows current through the ZVS inductance to change the voltage of the switching node to a condition for zero voltage switching of the second switch of the switching leg. Current through the first ZVS switch is opposite current through the second ZVS switch.

Abstract: Some embodiments include a high voltage, high frequency switching circuit. In some embodiments, the high voltage, high frequency switching circuit includes a high voltage switching power supply that produces pulses having a voltage greater than 1 kV and with frequencies greater than 10 kHz; a transformer having a primary side and secondary side; an output electrically coupled with the secondary side of the transformer; and a primary sink electrically coupled with the primary side of the transformer and in parallel with the high voltage switching power supply, the primary sink comprising at least one resistor that discharges a load coupled with the output.

Abstract: Reduced voltage switching of a main switch in flyback power converters. At least some example embodiments are methods including: storing energy in a field associated with a secondary winding of a transformer, the secondary winding arranged for flyback operation within a secondary circuit of the power converter; charging a capacitor coupled to an auxiliary winding of the transformer; discharging the energy in the field associated with the secondary winding to provide an output voltage of the power converter; and when the electrical current flowing through the secondary winding reaches a predetermined low level reducing voltage across a main switch in a primary circuit of the power converter by coupling the capacitor to the auxiliary winding to create a voltage on a primary winding of the transformer.

Abstract: A system includes a bus, and a variable voltage converter (VVC) having a switch in series with a capacitor, and an inductor in parallel with the capacitor and switch, and configured such that operation of the switch in boost mode over a duty cycle range from 0 to less than 0.5 results in a corresponding voltage output to the bus from 0 to a maximum of the VVC.

Abstract: The present disclosure discloses a charging device, a charging method, a power adapter and a terminal. The charging device includes a charging receiving terminal, a voltage adjusting circuit and a central control module. The charging receiving terminal is configured to receive an alternating current. The voltage adjusting circuit includes a first rectifier, a switch unit, a transformer and a second rectifier. The first rectifier is configured to rectify the alternating current and output a first voltage. The switch unit is configured to modulate the first voltage to output a modulated first voltage. The transformer is configured to output a second voltage according to the modulated first voltage. The second rectifier is configured to rectify the second voltage to output a third voltage. The voltage adjusting circuit applies the third voltage to a battery directly.

Abstract: A power supply includes a transistor that is connected to a primary winding of a transformer. A controller controls a switching operation of the transistor by quasi-resonant switching. The controller receives a feedback voltage and adjusts the feedback voltage to adjust a blanking frequency, which is an inverse of a blanking time during which the transistor is prevented from being turned on. The controller turns on the transistor after expiration of the blanking time based on a level of a resonant ring.

Abstract: A resonant conversion apparatus with extended hold-up time includes a resonant conversion unit, a time-extended unit, and a control unit. The resonant conversion unit includes a primary side, a transformer unit, and a secondary side. The time-extended unit includes a coil and a bridge arm assembly. When a switching frequency of the primary side is less than a critical frequency, the control unit controls the bridge arm assembly being switched on or switched off so that an output voltage of the resonant conversion apparatus is higher than a predetermined voltage within a hold-up time.

Abstract: A power supply includes a primary circuit connected to a primary winding of a transformer and a secondary circuit connected to a secondary winding of the transformer. The primary circuit includes MOSFETs, and the secondary circuit includes MOSFETs configured to rectify power transmitted from a primary side of the transformer and includes a capacitor configured to store the rectified power. The secondary circuit performs a discharge operation of discharging the capacitor and causing a current to flow into the secondary winding of the transformer to reduce a source-drain voltage of the MOSFETs before the MOSFETs are switched from an off state to an on state. Thus, the power supply having a high power-conversion efficiency even during low output is provided.

Abstract: The LLC resonant converter includes a bridge circuit configured to receive a DC input voltage, an LLC resonant circuit connected to the bridge circuit, a transformer connected to the LLC resonant circuit, a rectifier circuit connected to the transformer and configured to send out a converted DC voltage, a resonant capacitor changeover circuit, a bridge circuit control section, and a resonant capacitor changeover control section. When the input voltage exceeds a changeover voltage, the operating frequency is raised higher than the resonance frequency, and thereafter the switch is turned off.

Abstract: An adaptive pulse frequency modulation for a switching power converter is provided that varies the switching frequency across a cycle of a rectified input voltage for the switching power converter From a beginning of the cycle of the rectified input voltage, the switching frequency decreases from a maximum value to a minimum value at a mid-point of the cycle and then increases from the mid-point back to the maximum value at an end of the cycle.

Abstract: A controller circuit for controlling switching elements and controlling dead-time of the switching elements is configured to generate a phase difference voltage using voltage at a control node of a first switching element and voltage at a control node of a second switching element. The first switching element is configured to couple a first node of a supply and a switch node and the second switching element is configured to couple the switch node and a second node of the supply. The controller circuit is further configured to generate a first driving signal based on a first pulse width modulation (PWM) signal for the first switching element and the phase difference voltage. The first driving signal includes a voltage-controlled delay module. The controller circuit is further configured to generate a second driving signal for driving the second switching element based a second PWM signal for the second switching element.

Abstract: A multiphase inverter for an electric vehicle drive has a plurality of drivers to provide drive signals to respective gate loops of upper and lower transistors in the phase legs. A transformer has a secondary winding in a first gate loop of a first transistor in one phase leg and a primary winding connecting a Kelvin-emitter of the first transistor to a Kelvin-emitter of a second transistor in the other phase leg. Switching transients of transistors are shortened because when gate signal is toggled to change a conduction state of a transistor in a first phase leg, a rate of current change in the first leg is sensed in a transformer primary winding connected across a stray inductance of the first leg. A voltage proportional to the sensed rate is added to the gate signal via a transformer secondary winding, thereby increasing a common source inductance of the transistor.

Abstract: A method and device for providing isolated power transfer to a low-power load across a capacitor of a series resonance circuit are shown. The method includes comparing an output voltage received via a feedback loop with a desired output voltage. Responsive to determining that the output voltage is not equal to the desired output voltage, the method determines a sub-harmonic order of the resonant frequency of the series resonance circuit to use as a switching frequency and switches the series resonance circuit at substantially the determined subharmonic order of the resonant frequency.

Abstract: Provided is a circuit module having less noise, and an inverter using the same. The circuit module 2 is provided with a circuit part 4, an input terminal part 5, an output terminal part 6, and a support 21. The circuit part 4 includes a conversion circuit, and a switch circuit. The output terminal part 6 includes a first output terminal 61 and a second output terminal 62 that are respectively electrically connected to a pair of output points of the circuit part 4. The arrangement of the output terminal part 6 on one surface of the support 21 is such that the first output terminal and the second output terminal are positioned around the circuit part 4 on the same side with respect to the circuit part 4, or the first output terminal and the second output terminal are adjacent to one another around the circuit part 4.

Abstract: A dead-time circuit includes a signal propagation path from a first input node receiving a PWM modulated control signal to an output node, such signal propagation path switchable between a non-conductive state and a conductive state, such that the signal at the first input node is transferred to the output node when the signal propagation path is in the conductive state. The dead-time circuit further includes a differentiator circuit block coupled to a second input node and to the signal propagation path, the second input node configured to be coupled to an intermediate node of a half-bridge circuit. The differentiator circuit block switches the signal propagation path between the non-conductive state and the conductive state as a function of a time derivative of a signal at the second input node. At least one time-delay circuit component delays transfer of the signal at the first input node to the output node.

Abstract: The present disclosure discloses a charging device, a charging method, a power adapter and a terminal. The charging device includes a charging receiving terminal, a voltage adjusting circuit and a central control module. The charging receiving terminal is configured to receive an alternating current. The voltage adjusting circuit includes a first rectifier, a switch unit, a transformer and a second rectifier. The first rectifier is configured to rectify the alternating current and output a first voltage. The switch unit is configured to modulate the first voltage to output a modulated first voltage. The transformer is configured to output a second voltage according to the modulated first voltage. The second rectifier is configured to rectify the second voltage to output a third voltage. The voltage adjusting circuit applies the third voltage to a battery directly.

Abstract: A circuit for converting DC to AC power or AC to DC power comprises a storage capacitor, boost and buck inductors and switching elements. The switches are controlled to steer current to and from the storage capacitor to cancel DC input ripple or to provide near unity power factor AC input. The capacitor is alternately charged to high positive or negative voltages with an average DC bias near zero. The circuit is configured to deliver high-efficiency power in applications including industrial equipment, home appliances, mobility devices and electric vehicle applications.

Abstract: Disclosed are a wireless power transmitter and a method of controlling power thereof. A wireless power transmitter includes a power supply device to supply AC power to the wireless power transmitter; and a transmission coil to transmit the AC power to a reception coil of a wireless power receiver by resonance. The wireless power transmitter controls transmission power to be transmitted to the wireless power receiver based on a coupling state between the transmission coil and the reception coil.

Abstract: An object of the present invention is to synchronize PWM between individual phases of an IPM, so that the IPM has a simplified-scale circuit. An IPM according to the present invention includes a DC-DC converter including a multi-phase arm having a plurality of phase arms connected in parallel on a secondary side, a secondary-wire-voltage detection circuit configured to detect a secondary wire voltage in each phase arm of the DC-DC converter, and a synchronization-signal generation circuit configured to generate a synchronization signal in each phase arm on the basis of the behavior of the secondary wire voltage.

Abstract: The power supply apparatus comprising a generation unit configured to generate a pulse signal, a memory unit configured to store information set in advance on the driving frequency, and a determination unit configured to determine an error of the input voltage and an error of a load, to a piece of the information stored in the memory unit, a driving frequency detected by the detection unit under a state where a load is connected to the convertor, and based on a result of comparing, to a piece of the information stored in the memory unit, a driving frequency detected by the detection unit under a state where the load is not connected to the convertor.

Abstract: An inverter for inductive power transfer is disclosed.

Abstract: A bidirectional power converter circuit is controlled via a hysteresis loop such that the bidirectional power converter circuit can compensate for variations and even changes in transmit and receive coil locations without damaging components of the system. Because the bidirectional power converter is capable of both transmitting and receiving power (at different times), one circuit and board may be used as the main component in multiple wireless power converter designs. A first bidirectional power converter is employed in a sealed battery unit having no external electrical contacts. A second bidirectional power converter is employed in a corresponding cart bidirectional power converter assembly. The battery unit and the cart bidirectional power converter assembly cooperate to wirelessly transmit power from the battery unit to a load of the cart bidirectional power converter assembly and from a power source to the battery unit via the cart bidirectional power converter assembly.

Abstract: A problem detection apparatus includes a relay, a measurement circuit and a controller. The relay is provided between a power supply and an external circuit, both of which are in a high voltage system. The relay is configured to switch an electrical connection state of the power supply to the external circuit between a closed state and an open state. The measurement circuit measures a voltage of a circuit in the high voltage system. The measurement circuit is in the high voltage system and connected between the relay and the external circuit. In a case where a command to switch the relay to the open state has been output, the controller detects, based on the voltage measured by the measurement circuit, whether or not the relay has a short circuit. The controller is in a low voltage system having a lower voltage than a voltage of the high voltage system.

Abstract: Disclosed are implementations, including a method that includes obtaining sensor data from at least one sensor in communication with a charging station configured to simultaneously charge multiple chargeable devices using power stored in one or more energy storage devices connected to the charging station, including to simultaneously charge at least one inductive chargeable device, and perform a wired charging operation to charge at least one wired chargeable device. The method further includes determining, based on the sensor data, device information for each of chargeable devices, with the determined device information including, for example, a device type, location information, and/or timing information, and controlling charging operations of the charging station to charge the chargeable devices based, at least in part, on the device information for the each chargeable devices within the charging range of the charging station.

Abstract: A resonant converter includes a first switch on a primary side and a second switch coupled to the first switch, a first synchronous rectification switch on a secondary side conducted according to a switching operation of the first switch, a second synchronous rectification switch on the secondary side conducted according to a switching operation of the second switch, and a switch control circuit configured to detect a waveform of one end voltage of at least one of the first synchronous rectification switch and the second synchronous rectification switch, determine one of a below region and an above region, and differently control conduction duration of the first and second synchronous rectification switches according to a determined result.

Abstract: The invention relates to an isolated DC/DC converter (1) comprising: —a first branch (A) comprising series-connected switches (MA1, MA2), the first branch (A) being connected to the input of the converter; —a second branch (B) comprising series-connected switches (MB1, MB2); —an inductance (L2) connected between the midpoints of the first and the second branch (B); —a capacitor connected across the end terminals of the second branch (B); —a third branch (C) comprising a magnetic component and connected to the midpoint of the second branch (B); wherein a series of opening and shutting actions of the switches (MA 1, MA2, MB1, MB2) converts an input voltage (Ue) into an output voltage (Uout) by means of the magnetic component.

Abstract: An adjustable zero voltage to high voltage power supply electrically receives a voltage source and electronically receives a control signal. The adjustable zero voltage to high voltage power supply includes a first modulator generator, which provides an adjustable voltage signal equivalent to the operating range of the first modulator generator. A second modulator generator receives the adjustable voltage signal and produces a modulated signal. An adjustable pulse width modulator transmits a clock signal to the second modulator generator to control a frequency of the adjustable voltage signal and cause the second modulator generator to produce a modulated signal. A plurality of integrated circuits is configured to receive a control signal and feedback a signal to the first modulator generator and the adjustable pulse width modulator to change from a fixed frequency to a variable increasing frequency.

Abstract: The present invention discloses an LED lamp adapted to work in a circuit that contains a magnetic ballast. The LED lamp comprises a bridge rectifier, a filter capacitor, an LED light source, a transistor, and a pulse width modulation controller. The bridge rectifier is configured to convert the alternating current supplied by the magnetic ballast into a direct current. The bridge rectifier comprises a first input terminal, a second input terminal, a first output terminal, and a second output terminal, where the first and second input terminals are electrically connected to the magnetic ballast. The filter capacitor is electrically connected to the first and second output terminals of the bridge rectifier. The LED light source is electrically connected to the first and second output terminals of the bridge rectifier. The transistor comprises a drain electrode, a source electrode, and a gate electrode.

Abstract: A high-frequency half-wave rectifier system of low-harmonicity and high-efficiency, which mainly comprises: a current output device having an output end and a first flow-return end respectively at both ends, a rectifying module, a resonant tuning unit, a first node, a voltage regulator module, at least one load element, a grounding portion, and at least one flow-return path. By means of the above structure, a simple circuit configuration and appropriate capacitance value setting are used to control the duty cycle of the rectifying module to approximately 74 nanoseconds and adjust the output power and improve the AC to DC conversion efficiency for the rectifying module under the low electromagnetic interference condition.

Abstract: The power supply apparatus having a current resonance circuit includes a charge unit connected to a primary winding of a transformer, and storing electric charge, and a connection unit connected in series with the charge unit, and configured to switch the charge unit between a connecting state in which one of charging and discharging is enabled, and a non-connecting state, and after making the connection unit into the connecting state, while a current is flowing into either one of the first diode and the second diode, the first control unit performs transition from a halt period to an operating period of a switching operation by turning ON the switching element of the one of the first diode and the second diode, the current being flowing into the one of the first diode and the second diode.

Abstract: According to one aspect of the present disclosure, there is provided an apparatus that includes a first power converter stage connected to a first side of a first transformer, and a second power converter stage connected to a first side of a second transformer. The apparatus further includes an interleaved multi-bridge circuit connected to the second side of the first transformer and to the second side of the second transformer. The apparatus further includes a controller that is configured to operate the interleaved multi-bridge circuit in a parallel mode in which the second sides of the first and second transformers are in parallel at a DC terminal of the interleaved multi-bridge circuit and in a series mode in which the second sides of the first and second transformers are in series at the DC terminal.

Abstract: The present invention relates to a circuit arrangement and to a method for sensorless commutation of electronically commutated synchronous machines such as, for example, EC motors, wherein the terminal values at the connection terminals of the synchronous machine are processed by means of a rotor position estimator based on the EMF of the synchronous machine and of a known motor model preferably in a PLL structure for sensorless determination of rotor position information, and said information is used for commutation.

Abstract: A half-bridge power converter includes a transformer dividing the half-bridge power converter into a primary side and a secondary side. Disposed on the first side is a first capacitor bank and a second capacitor bank in series with the first capacitor hank, and also a bootstrap capacitor configured to be charged by current flowing through a charging current flowpath. The charging current flowpath extends at least through a pre-charging circuit located on the primary side, the pre-charging circuit being configured to reduce a voltage imbalance between the first capacitor bank and the second capacitor bank. The half-bridge power converter also includes a discharging current flowpath that extends at least through a primary winding of the transformer and the pre-charging circuit.

Abstract: A module (1) includes an insulating substrate (15), a power semiconductor device (13HT), a power semiconductor device (13LT), a bridge terminal (14B), a high-side terminal (14H), and a low-side terminal (14L). The bridge terminal extends from a surface wiring conductor (12B) at a position between the power semiconductor devices (13HT, 13LT). The high-side terminal extends from a high-side rear surface wiring conductor (17H) at a position between the power semiconductor devices (13HT, 13LT). The low-side terminal extends from a low-side rear surface wiring conductor (17L) at a position between the power semiconductor devices (13HT, 13LT). A surface electrode of the power semiconductor device (13HT) and a rear electrode of the power semiconductor device (13LT) are connected to the surface wiring conductor (12B).

Abstract: The present disclosure discloses a charging device, a charging method, a power adapter and a terminal. The device includes: a charging receiving terminal configured to receive a first alternating current; a voltage adjusting circuit, including a first rectifier configured to rectify the first alternating current and output a first voltage with a first ripple waveform, a switch unit configured to modulate the first voltage according to a control signal to obtain a modulated first voltage, a transformer configured to output a plurality of voltages with ripple waveforms according to the modulated first voltage, and a compositing unit configured to composite the plurality of voltages to output a second alternating current; and a central control module configured to output the control signal to the switch unit so as to adjust voltage and/or current of the second alternating current in response to a charging requirement of the battery.

Abstract: A method of operating a switching power converter includes operating the switching power converter in a boundary conduction mode when a switching frequency of a switch in the switching power converter is below a switching frequency threshold such than an on time of the switch is adjusted based on a desired output power of the switching power converter, and operating the switching power converter in a discontinuous conduction mode when the switching frequency of the switch is above the switching frequency threshold such that one or more of the on time of the switch and a switching period of the switch are adjusted based on the desired output power of the switching power converter and the on time of the switch is clamped at a minimum switch on time.

Abstract: A power converting system that includes: a rectifier configured to convert an input voltage into a output voltage and including an output node that is coupled to floating ground; a radio frequency (RF) power amplifier coupled to the rectifier and configured to generate a load voltage based on an RF clock and the output voltage; a detector coupled to the RF power amplifier and configured to detect the load voltage of the RF power amplifier; an integrator coupled to the detector and configured to generate a direct current (DC) voltage based on the detected load voltage; and a controller coupled to the integrator and configured to, based on the DC voltage, generate a control signal to adjust one or more features of the RF power amplifier is disclosed.

Abstract: The invention relates to a method of inductive current transmission via at least one transmission coil subjected with electrical power by an amplifier, wherein the amplifier is operated in a zero voltage switching (ZVC) and zero current switching (ZCV) mode.

Abstract: A flyback converter can include an auxiliary winding magnetically coupled to the secondary (output) for sensing a reflected output voltage. A controller can operate a power switch of the flyback converter in a burst mode to deliver a number of pulses, causing the output voltage to reach a threshold, and thereafter suspend switching for a predetermined time period before delivering a further number of pulses. The delivered number of pulses can be counted, and, responsive to a determination that the count is less than a predetermined minimum number of pulses, the predetermined time period can be increased. Responsive to a determination that the count is greater than a predetermined maximum number of pulses, the predetermined time period can be decreased.

Abstract: Provided is an energy conversion and storage apparatus using an electronic wave. The device comprises: a rectifier which rectifies an alternating current generated by converting an electronic wave inputted from the outside; and storage which receives and stores the rectified alternating current and is grounded.

Abstract: Various examples are provided for soft switching solid state transformers and converters, and their operation and application. In one example, a soft switching solid state power transformer includes a high frequency (HF) transformer; first and second auxiliary resonant circuits coupled to the HF transformer; and first and second current-source inverter (CSI) bridges coupled to the corresponding first auxiliary resonant circuits. The first and second CSI bridges include reverse blocking switch assemblies that conduct current in one direction and block voltage in both directions. In another example, a reactive power compensator includes a high frequency (HF) transformer, first, second and third auxiliary resonant circuits coupled to the HF transformer, and first, second and third current-source inverter (CSI) bridges coupled to the corresponding first auxiliary resonant circuits.

Abstract: A power supply circuit can include: a constant current control circuit configured to receive a first voltage and a first current from a power supply, and to generate a second voltage and a second current that are substantially constant; a shunt circuit, where when the second current is greater than the output current, the shunt current circuit is configured to shunt the second current, and when the second current is less than or equal to the output current, the shunt circuit stops operating; and an energy storage circuit, where when the second current is greater than the output current, the energy storage circuit is configured to store energy, and when the second current is less than or equal to the output current, the energy storage circuit is configured to release energy and provide power for the load together with the constant current control circuit.

Abstract: A high-frequency filter includes a first terminal, a second terminal, a third terminal, a first inductor, a second inductor, a third inductor, and a fourth inductor. The first inductor and the second inductor are connected in series to each other between the first terminal and the second terminal. The third inductor and the fourth inductor are connected in parallel to each other between the third terminal and a node of the first inductor and the second inductor. The connection between the first inductor and the second inductor is an additive polarity connection. The connection between the third inductor and the fourth inductor is an additive polarity connection.

Abstract: System controller and method for regulating a power converter. For example, the system controller includes a first controller terminal and a second controller terminal. The system controller is configured to receive, at the first controller terminal, an input signal, generate a drive signal based at least in part on the input signal, and output, at the second controller terminal, the drive signal to a switch to affect a current associated with a secondary winding of the power converter. The system controller is further configured to detect a first duration of a demagnetization period associated with the secondary winding based at least in part on the input signal, determine a second duration of a time period for the drive signal based at least in part on the first duration, and keep the drive signal at a first logic level during the entire time period.

Abstract: A power supply system suitable for use by an aircraft is disclosed. The power system converts power from an unregulated DC power source to multiple AC and DC voltage outputs. The power supply system comprises an interleaved buck converter, and interleaved full-bridge converter, an interleaved inverter, and a control system. In one configuration, the interleaved inverter uses high-voltage DC generated by the interleaved four-bridge converter as its power input to generate a high-voltage AC output.

Abstract: A high power factor converter is provided. The high power factor converter includes a rectifier, a reactive power control circuit and a converter circuit. The rectifier is utilized for receiving and converting an input AC voltage in to an input DC voltage. The reactive power control circuit is coupled to the rectifier for performing a reactive power control operation based on the input DC voltage. The converter circuit is coupled to the reactive power control circuit for converting the input DC voltage into an output voltage.

Abstract: A DC-to-DC controller and a control method thereof are provided. The DC-to-DC controller couples to an output stage, and the output stage provides an output voltage and includes an upper bridge switch and a lower bridge switch. The DC-to-DC controller includes a time signal generating unit and a time signal control circuit. The time signal control circuit couples to the time signal generating unit and receives a preset voltage and the output voltage. During a soft start period, if the output voltage is lower than the preset voltage, after the upper bridge switch is turned off and before the upper bridge switch is turned on again, the time signal control circuit turns off the upper bridge switch and the lower bridge switch for a first preset time and turns on the lower bridge switch for a second preset time.