188 results about "Voltage boosting" patented technology

The invention discloses a high-speed level conversion circuit, and belongs to the technical field of integrated circuit design, the circuit mainly comprises an input signal processing module, a voltage boosting module, a differential signal generation module, a signal amplification module and an output module, the input signal processing module converts a low-voltage input signal into a complementary logic signal pair; the voltage boosting module raises the voltage amplitude of the complementary logic signal by using a charge pump principle; the lifted signal drives a thick gate transistor in the differential signal generation module to generate a differential signal; the signal amplification module adopts a cross coupling structure to quickly amplify the differential signal; and finally, the output module outputs a high-voltage domain signal in an inverted manner. By introducing voltage bootstrap before gate driving, the overdrive voltage of a core switch tube is remarkably increased, so that the problem of low conversion speed of a traditional level conversion circuit is effectively solved on the premise of not increasing the device size and static power consumption, and high-speed and high-efficiency level conversion is realized.

The invention relates to the technical field of power electronic control, and provides a soft start control method for a three-phase PFC (Power Factor Correction), a PFC controller and a power supply system.The soft start control method comprises the steps that when a PFC start instruction is received, an initial target voltage value is set as an actual value of current bus voltage; maintaining the initial target voltage value for a first preset duration; after the initial stable state, sampling in real time to obtain the actual value of the current bus voltage, and calculating the absolute value of the voltage difference between the actual value of the current bus voltage and the current target voltage value; judging whether the absolute value of the voltage difference is smaller than or equal to a preset trigger threshold value; if yes, adding a preset voltage step value to the current target voltage value; if not, keeping the current target voltage value unchanged; and recursive control of the current bus voltage is executed circularly until the updated current target voltage value reaches the final target voltage value. According to the mode, the starting rapidity and the stability of the boosting process are balanced.

The invention relates to the technical field of switching power supply analog control, in particular to a control method and system for a small-duty-ratio BOOST module based on digital control, and the method comprises the following steps: S1, carrying out the sampling of the equal-proportion reduced output voltage of an operational amplifier through an ADC analog-to-digital converter, processing the sampled voltage value through a filtering algorithm to obtain an output voltage VO; and S2, carrying out calculation processing on the output voltage VO through a PID control algorithm, and obtaining an expected output voltage through a fixed-frequency adjustment duty ratio PWM and a fixed-duty ratio frequency modulation PFM. Efficient and stable voltage boosting is achieved through double-closed-loop digital control, dynamic response and anti-interference capacity are achieved, the core lies in collaborative design of power conversion and a control strategy, input direct-current voltage is boosted to higher stable output voltage, a double-closed-loop (voltage loop + current loop) control strategy is adopted, and the voltage boosting effect is achieved. And closed-loop adjustment is realized by combining PWM driving and ADC sampling.

The invention discloses a power supply circuit, an expanded circuit system thereof and a method for realizing maximum power point tracking and dynamic step-up / step-down according to output requirements. The power supply circuit comprises an input capacitor, an inductor, a switch, a controller for controlling the working state of the switch, a capacitor and a transformer, the peak value of the output current can be adjusted through high frequency, the frequency and / or duty ratio of the adjusting switch can be further controlled, the charging and discharging time of the inductor can be controlled, meanwhile, maximum power point tracking and voltage boosting / reducing and isolation according to the output requirement are achieved, and therefore in the field with the unknown input power source power, the application range is wide. The maximum power value of the power supply input to the power supply circuit can be detected, the electric energy input to the power supply can be obtained to the maximum extent, the electric energy conversion rate is improved, the number of used components is small, the cost can be effectively saved, the stability is good, the energy loss is low, and the electric energy conversion rate reaches up to 96% or above.

The invention belongs to the field of high-pressure equipment, and relates to a sealing pressure reducing device of manual extremely-high-pressure supercharging equipment and a using method of the sealing pressure reducing device. The sealing pressure reduction device comprises a sealing rod and a fixing sleeve, a supporting rod with the diameter smaller than that of the sealing rod is integrally formed in the center of the right end of the sealing rod, the supporting rod is sleeved with the fixing sleeve in an interference fit mode, the left end of the fixing sleeve is sleeved with the sealing ring in an interference fit mode, and the supporting rod is sleeved with the L-shaped annular pressure reduction mechanisms in an interference fit mode. The L-shaped annular pressure reducing mechanism is located on the left side of the fixing sleeve, and the left end of the L-shaped annular pressure reducing mechanism is sleeved with the sealing ring in an interference fit mode. According to the using method of the sealing pressure-reducing device, the screw rod is manually operated to rotate so that the sealing rod can move towards the outlet direction of the pressure cylinder, abrasion of the inner wall of the pressure cylinder to the sealing pressure-reducing device is reduced through deformation of the L-shaped annular pressure-reducing mechanism, and the pressure-increasing space of the pressure cylinder reaches preset pressure. The pressure reduction function is automatically started by means of pressure applied by fluid, and mechanical abrasion and maintenance requirements are reduced.

The present application relates to the technical field of analog circuit, and discloses a charge pump.The charge pump comprises a first voltage boosting control circuit, a second voltage boosting control circuit, a first voltage lifting circuit and a second voltage lifting circuit.The first voltage boosting control circuit can generate a first multiplex signal at a first node and a second multiplex signal at a second node in response to an input voltage and a control signal.The second voltage boosting control circuit comprises a third node and a fourth node.The first voltage lifting circuit is connected between the first node and the third node, and the second voltage lifting circuit is connected between the second node and the fourth node.When the control signal is a first level signal, the first voltage lifting circuit lifts the voltage of the third node to a first multiplex voltage according to the first multiplex signal, and the second voltage boosting control circuit outputs a target voltage in response to the first multiplex voltage of the third node and the input voltage.The same is true when the control signal is a second level signal.Therefore, the embodiment does not need to increase an additional circuit to drive the charge pump.

The application discloses a PFC circuit and an electric flame stove suitable for direct current and alternating current, comprising a voltage switching control module, a filter module, an inverter voltage boosting module, a full-bridge rectifying module and a power factor correction module. The voltage switching control module detects input voltage and controls the on-off of the filter module and the inverter voltage boosting module respectively, realizing the adaptation of 48V direct current and 220V alternating current voltage input. The power factor correction module adopts a Boost (voltage boosting) type active PFC topology, the high-frequency on-off control of the switching tube Q7 / Q8 is realized through the control chip U2 / U3, the input current waveform follows the input voltage waveform, the power factor is improved to above 0.95, the switching tube Q8 is adopted to replace the diode in the prior art, there is no voltage and current loss when the switching tube is turned on, the stable current and voltage output are ensured, the voltage / current waveform is consistent, and the power factor is improved.

The invention discloses a voltage boosting type non-isolated DC-DC conversion circuit and a construction method thereof. The voltage boosting type non-isolated DC-DC converter comprises a basic boosting type DC-DC converter and an auxiliary boosting module, the first end of the auxiliary boosting module is electrically connected with the first pre-stage output end, the second end is electrically connected with the pulse output end, and the third end is electrically connected with the second pre-stage output end; the auxiliary boosting module is used for boosting the voltage between the second end and the first end of the basic boosting type DC-DC converter or between the second end and the third end of the basic boosting type DC-DC converter in the charging stage of the basic boosting type DC-DC converter; and in the discharge stage, the output voltage of the basic boost DC-DC converter is transmitted to the other one between the second end and the first end or between the second end and the third end of the basic boost DC-DC converter. According to the invention, the boost capability can be improved on the premise of not increasing the cost and control complexity of the conversion circuit.

The utility model discloses a power supply circuit of a display screen. The circuit comprises a charge pump booster circuit, a charge pump negative voltage circuit and a turn-off booster circuit, the turn-off boost circuit comprises a turn-off circuit and a boost circuit; the first input end of the turn-off circuit is connected to the output end of the charge pump booster circuit; the second input end of the turn-off circuit is connected to the output end of the charge pump negative voltage circuit; the third input end of the turn-off circuit is powered by a first power supply; the output end of the turn-off circuit is connected with the input end of the booster circuit; the first output end of the booster circuit is connected to the input end of the charge pump booster circuit; the second output end of the booster circuit is connected to the input end of the charge pump negative voltage circuit; the third output end of the booster circuit outputs voltage. According to the power supply circuit of the display screen, the power supply circuit can be turned off when positive and negative bias voltages of the power supply circuit are overvoltage, and the safety of the display screen is improved.

The invention discloses a high-voltage pulse power supply based on a combination mode of a super capacitor and a thin-film capacitor. Comprising a DSP signal processing and control circuit, a man-machine interaction module, a communication and external control input circuit, a mains supply alternating current input and common mode filtering module, an isolation type super capacitor energy injection system, a medium-voltage super capacitor energy storage unit, a non-isolation type booster circuit, a high-frequency filtering circuit and a high-voltage thin-film capacitor energy storage unit. The system comprises an output high-voltage electronic switch, an isolation driving circuit, a multi-point voltage and current detection circuit and a system power supply module. According to the invention, a super capacitor and a thin-film capacitor are mainly used as a secondary energy storage core, and the imbalance phenomenon of a conventional hybrid energy storage system of a super capacitor, an electrolytic capacitor and a thin-film capacitor is avoided through the isolation of voltages and impedances at all levels; and the service life of the super capacitor is prolonged.

The utility model discloses a 10-35kV energy storage and boost all-in-one machine, which comprises an energy storage module, a boost module and a control unit, a connecting mechanism is arranged between the energy storage module and the boost module, the connecting mechanism comprises a protection structure and a cooling assembly, a lead for connecting the energy storage module and the boost module passes through the protection structure, and the cooling assembly is connected with the control unit. The high temperature generated when the wire is electrified is reduced through the cooling assembly; the protection structure comprises an upper semicircular shell and a lower semicircular shell, and the upper semicircular shell is rotationally connected with the rear portion of the top of the lower semicircular shell. According to the 10-35kV energy storage and boosting all-in-one machine, the connecting mechanism is arranged between the energy storage module and the boosting module, so that a connected wire penetrates through the interior of the protection structure, the protection structure is convenient to open, wire arrangement is carried out, the temperature of the heated wire can be rapidly reduced through the cooling assembly, and the working efficiency is improved. And the condition of large loss caused by the wire temperature process is avoided.

The application provides a pixel driving circuit and a display panel, which comprise: a driving transistor, which is connected in series between a first power supply line and a second power supply line and has a source electrode electrically connected to a light-emitting element; a data transistor, which has a source electrode electrically connected to a data line, a drain electrode electrically connected to a gate electrode of the driving transistor, and a gate electrode loaded with a data control signal; and a voltage boosting module, which has an input end for loading a voltage boosting input signal and an output end electrically connected to the gate electrode of the driving transistor; wherein the voltage boosting module is arranged to be in a second stage after a first stage, so that the gate electrode of the driving transistor has a second voltage greater than a first voltage, and a connection point between a first capacitor and a second capacitor is connected to the gate electrode of the driving transistor, so as to increase a driving current flowing through the light-emitting element, improve the luminous brightness of the light-emitting element, and improve the brightness of the display panel.

The utility model provides a wide-range power conversion module. The wide-range power conversion module comprises a first input conversion unit and a second input conversion unit, the input end of the first input conversion unit is connected with a transformer of external power supply equipment; the input end and the output end of the second input conversion unit are respectively connected with the output end of the first input conversion unit and the input end of the electric equipment; the boosting unit at least comprises a boosting circuit connected to the secondary side of the transformer, the boosting circuit is a PWM control circuit, and conversion of the input voltage range is achieved based on PWM control. A conversion module is formed by a boosting unit, an input EMI filtering unit, a DC / DC conversion unit, an output filtering unit and an output redundancy unit, and power conversion of high-voltage input can still be achieved under the condition that the size of the module is kept small enough; meanwhile, a winding is additionally arranged on the secondary side of the transformer, the transformation ratio of the transformer can be improved, a switching tube is additionally arranged at the connecting position of the original winding and the newly-added winding, the switching tube is connected when high voltage is input, the switching tube is disconnected when low voltage is input, and therefore wide-range input is achieved.

The invention discloses a serial transformer high-voltage accelerator which comprises at least one booster circuit device, the booster circuit device comprises a plurality of alternating-current transformers, the alternating-current transformers are sequentially connected in series, one end of each serial alternating-current transformer is a direct-current high-voltage end of the booster circuit device, and the other end of each serial alternating-current transformer is a direct-current high-voltage end of the booster circuit device. And the direct-current high-voltage end is connected with a high-voltage electrode of the serial transformer high-voltage accelerator. The invention provides a novel high-voltage accelerator, which comprises a more efficient booster circuit, and can greatly improve the high-voltage generation efficiency and reduce the power consumption cost.

The utility model discloses an automatic voltage boosting device of magnetron sputtering vacuum coating machine, including the bottom plate, the bottom plate top is fixed with the backplate, the bottom plate top is fixed with the mounting seat, and the mounting seat top is installed with the voltage boosting sensor, and the voltage boosting sensor top is installed with the circuit board, and the backplate inboard wall is provided with the protective cover, and the protective cover outboard wall four corners all are set up with the round hole, and the backplate outboard wall four corners all are provided with the fixed mechanism for fixing the protective cover, and the protective cover top is provided with the connection box. The utility model discloses through the combination use of blowing mechanism and cooling mechanism, can effectively reduce the temperature of voltage boosting sensor and circuit board, ensures the equipment to keep good heat dissipation effect when working, prevents overheating, and in the process of heat dissipation, cooperation filtering mechanism can effectively remove the dust and moisture in air, avoids these impurities to cause the influence to internal element, thereby guarantees the normal operation of equipment, prolongs the life.

This application provides a microfluidic driving circuit and its driving method, as well as a microfluidic device, including a charging unit, a driving unit, and a voltage boosting unit. The charging unit is connected to a data line and the control terminal of the driving unit. The voltage boosting unit includes a first energy storage subunit and a first reset subunit. A first end of the first energy storage subunit is connected to the control terminal of the driving unit at a first connection node, and a second end of the first energy storage subunit is connected to a second path terminal of the driving unit at a second connection node. The first reset subunit is connected to the second connection node and a low-potential voltage source, and its control terminal is connected to a second scan signal line. Specifically, by setting the voltage boosting unit, the potential of the first connection node can be increased during the writing of a high potential to the driving electrode, so that the driving unit can maintain its conduction state even if there is leakage at the first connection node, thereby improving the accuracy and stability of the microfluidic driving circuit.

A boosting circuit (102, 103, 104, 105, 106, 107) for providing a boosted signal voltage (108) for driving a switch of a CDAC is disclosed. It comprises an inverter stage (102, 103) comprising a first inverter (102) connected in series with a second inverter (103). The first inverter (102) is arranged for receiving an input control signal voltage. An output of said second inverter (103) is connected to a storage capacitor (107). It further comprises a charge pump (104, 105, 106). The storage capacitor (107) has an input branch connected to said output of said second inverter (103) and an output branch connected to said charge pump (104, 105, 106). Said output branch is arranged to be connected to said switch of said CDAC. The charge pump (104, 105, 106) is arranged to connect a shift voltage to said output branch of said storage capacitor (107) during an OFF-phase of said input control signal voltage and disconnect said shift voltage from said output branch of said storage capacitor (107) during an ON-phase of said input control signal voltage. The first inverter (102) is biased between a supply voltage (110) and a low voltage, said first low voltage (111) being higher than zero volt.

The all-solid-state high-voltage pulse module switch group disclosed by the present invention includes: a DC voltage source module, a pre-stage switch module, a driving module, a voltage boosting module, a pulse compression module, and a load module; the DC voltage source module is connected to the input end of the pre-stage switch module; the driving module is connected to the control end of the pre-stage switch module; the output end of the pre-stage switch module is connected to the input end of the voltage boosting module; the output end of the voltage boosting module is connected to the input end of the pulse compression module; the output end of the pulse compression module is connected to the load module. This all-solid-state high-voltage pulse module switch group has the advantages of being simple and easy to implement, and having a stable operating frequency.

The invention provides a low-voltage operation microprocessor integrated circuit and a method for prolonging the service life of a battery, the low-voltage operation microprocessor integrated circuit is used for operating by using a single battery, and the low-voltage operation microprocessor integrated circuit comprises a power supply voltage point, a common voltage point, a voltage boosting circuit and a microprocessor circuit. The power supply voltage point is coupled to the anode of the single battery. The common voltage point is coupled to the negative electrode of the single battery. The voltage boosting circuit is coupled to the power supply voltage point and the common voltage point, and is used for generating an operation voltage according to a voltage difference between the power supply voltage point and the common voltage point. The power input end of the microprocessor circuit is coupled with the output end of the voltage boosting circuit and receives the operation voltage.

The invention discloses an intelligent power failure protection and voltage stabilization system and a control method thereof, and belongs to the technical field of electronic circuits. The intelligent power failure protection and voltage stabilization system comprises an automatic detection module used for detecting an input voltage and outputting a detection signal; the logic control module is used for controlling the working states of the super capacitor module and the voltage boosting and stabilizing module according to the detection signal; the super capacitor module is used as a standby power supply and outputs standby discharge voltage under the condition that the working state is turned on; and the voltage boosting and stabilizing module is used for carrying out voltage boosting and stabilizing adjustment processing on the standby discharge voltage under the condition that the working state is turned on. According to the technical scheme, the input voltage can be monitored in real time, power-down protection is provided in time when abnormity is monitored, the output voltage of the power-down protection is boosted and stabilized, stable voltage output is provided for an external circuit, and therefore the safety of the electronic equipment and data stored in the electronic equipment is guaranteed.

The invention discloses a series-parallel connection type network construction energy storage and micro-grid combined black-start system and method, and belongs to the technical field of energy storage and micro-grids, and the method comprises the steps: carrying out the slow start boosting when a micro-grid is disconnected with a large power grid and the interior of the micro-grid is in a power failure state; when the second converter reaches the power upper limit and the bus voltage stops rising, the new energy converter outputs power to the AC bus; judging whether the AC bus voltage reaches a rated value or not, and if not, sending a frequency modulation and voltage regulation instruction to the series-parallel connection type networking energy storage unit; and the first converter starts frequency modulation and voltage regulation control until the voltage of the alternating current bus reaches a rated value, and series-parallel connection type network construction energy storage and micro-grid combined black start is completed. According to the method, network construction support and rapid black start of the micro-grid can be realized, transformer excitation inrush current and oscillation instability in the start process are avoided, and the reliability and power restoration rapidity of local micro-grid power supply under new energy network following control are improved.

1. The name of the design product: energy storage and voltage boosting integrated machine. 2. The use of the design product: for energy storage, and converting battery DC power into AC power, increasing voltage through a step-up transformer, and integrating into the power grid. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. Not common view, omit the top view.

This technology provides a mechanism to stop the output from the housing containing the low-voltage battery to the outside when the service plug is removed. [Solution] The vehicle 1, including the on-board control device 30, comprises a low-voltage battery 11, a high-voltage battery 12, a first voltage conversion unit 13 that performs a voltage boosting operation to boost the voltage input from the low-voltage battery 11 and output it to the high-voltage battery 12, a housing 19 that houses the low-voltage battery 11, a switch unit 14 between the low-voltage battery 11 and the first voltage conversion unit 13 that stops the output from the low-voltage battery 11 to the outside of the housing 19, and a service plug 18 that cuts off the power supply from the high-voltage battery 12 when it is disconnected from the connection target unit 17. The on-board control device 30 includes a control unit 40 that controls the switch unit 14. When the control unit 40 determines that the service plug 18 has been disconnected from the connection target unit 17, it switches the switch unit 14 to the off state.

The invention discloses a high-frequency isolation high-reliability UPS device power topological structure which is characterized in that commercial power is connected to a UPS distribution box, is output to a UPS host through a change-over switch, and is output after being connected to a power correction unit; the battery is connected to the UPS host, outputs DC360V through the boost unit, outputs the DC360V after being connected to the power factor correction unit through the voltage stabilization unit, and is connected to the high-frequency transformer isolation unit in parallel with the output of the commercial power. After rectification and voltage stabilization, the power is connected to the inversion unit and is output to the UPS distribution box, and multiple paths of load power are output through the circuit breaker. Commercial power input adopts a normal power supply mode and a maintenance power supply mode, and when the UPS host is abnormal, the UPS distribution box is switched to the maintenance mode to directly supply power to the load. The problem that a traditional inverter is not isolated when commercial power is input is solved, input and output full isolation of the UPS device is achieved, the anti-interference capability of the device is improved, and the reliability of the device is enhanced.

The utility model discloses a surge suppression circuit and an electronic product using the same. The circuit comprises a rectification filtering unit, a surge suppression unit, a PFC boost unit, a voltage detection unit and a relay control unit. The input end of the rectifying and filtering unit is connected with a power live wire and a power zero wire, and the rectifying and filtering unit is used for converting an alternating-current power supply signal into a direct-current power supply signal; the PFC boost unit is used for adjusting the current waveform of the power supply signal; the voltage detection unit outputs a first voltage detection signal when receiving a power supply signal exceeding a preset voltage threshold, and outputs a second voltage detection signal when receiving a power supply signal not exceeding the preset voltage threshold; the relay control unit outputs a first switching signal to the surge suppression unit, and the surge suppression unit outputs a surge control signal when receiving the first switching signal to control the surge voltage to be reduced. The utility model provides a technology capable of effectively suppressing surge current and reducing power supply loss.

The utility model provides a cold light screen drive circuit based on high frequency boost and an electronic cigarette, the cold light screen drive circuit comprises a first boost module, a second boost module, a control module, a cold light screen control module and a cold light screen, the output end of the first boost module is connected with the input end of the second boost module; the output end of the second boosting module is connected with the cold light screen; the input end of the control module is connected with power supply voltage, the control module outputs a high-frequency boosting driving signal to the input end of the second boosting module and outputs a cold light screen control signal to the input end of the cold light screen control module, and the output end of the cold light screen control module is connected with the cold light screen. According to the utility model, high-frequency boosting is carried out on the power supply voltage through the two-stage boosting circuit, the miniaturization, lightening and thinning of the electronic cigarette circuit are met, the voltage frequency is higher than the frequency range which can be heard by human ears, squeal of the second boosting module is avoided, and the use experience of a user is improved.

The utility model provides a driving circuit and an LED circuit, and relates to the technical field of driving circuits. In the driving circuit, a first output end of a voltage comparison circuit is connected with a booster circuit, and a second output end of the voltage comparison circuit is connected with a step-down circuit; the output end of the booster circuit and the output end of the step-down circuit are connected with the same load to be powered; a voltage dividing end and an input end of the voltage dividing circuit are respectively connected with the voltage comparison circuit, and the voltage dividing circuit is used for outputting divided voltage of external voltage of the input end through the voltage dividing end; the voltage comparison circuit is used for transmitting the external voltage of the input end to the boost circuit through the first output end when the voltage of the divided voltage is lower than the reference voltage, and transmitting the external voltage of the input end to the buck circuit through the second output end when the voltage of the divided voltage is larger than or equal to the reference voltage. According to the embodiment of the invention, the interference of external voltage change on the load can be reduced, the normal work of equipment is effectively ensured, and the safety and stability of the equipment are improved.

The utility model relates to the technical field of inverters, in particular to a bidirectional AC / DC inverter circuit, which comprises a BUS bus energy storage circuit and a bidirectional DCAC inverter circuit, the BUS bus energy storage circuit comprises a capacitor C1, two ends of the capacitor C1 are connected with a battery in parallel, the BUS bus energy storage circuit is connected with a power grid through the bidirectional DCAC inverter circuit, and the DC / DC inverter circuit is connected with the power grid. AC-DC conversion of voltage and conversion of energy storage and energy release are achieved through the bidirectional DCAC inverter circuit, the purpose of voltage boosting and bucking can be achieved, therefore, the rated voltage of the battery does not need to be 360 V, the voltage range of the battery can be expanded, the purpose of outputting rated AC voltage through inverter voltage boosting and bucking can be achieved, and the circuit is simple in structure and easy to control.

The embodiment of the application discloses a carrier control method, a carrier control device and a storage medium, and is used for the technical field of carrier control. In the embodiment of the application, the carrier signals of the multiple voltage boosting circuits in the same converter module are staggered with each other in a preset switching period; the carrier signals of the converter modules in the rectifier cabinet are controlled to be staggered with each other based on the target module number and the preset module number of the converter modules in the rectifier cabinet; and the carrier signals of the voltage boosting circuits contained in the rectifier cabinet are staggered with each other in the preset switching period, so that the high-frequency voltage ripple of the converter module can be effectively eliminated, and the normal work of the rectifier cabinet is ensured.

Examples are disclosed that relate to a power supply device having improved power efficiency. In one example, a power supply device includes an electrical power interface configured to receive electrical power from a power source. A power factor correction (PFC) circuit is configured to increase a voltage of the electrical power from an input voltage to a converter voltage and increase a power factor of the power supply device. An LLC resonant converter is configured to regulate an output voltage based at least on the input voltage and a system load. A voltage boosting circuit is configured to turn off the PFC circuit and increase the voltage of the electrical power from the input voltage to the converter voltage based at least on an operating condition of the power supply device.