Single tube power device drive power supply device

Abstract

The embodiment of the application discloses a kind of single tube power device drive power supply unit, including: drive chip, transformer, rectifying unit, first resonant capacitor, second resonant capacitor and voltage stabilizing module;Wherein, the voltage input end of drive chip is used to connect external DC power supply;The positive input end of the primary winding of transformer is connected to the first drive output end of drive chip, and the positive output end of the secondary winding is respectively connected to the input end and the output end of voltage stabilizing module through first resonant capacitor and second resonant capacitor, so that the parasitic leakage inductance of the secondary winding and first resonant capacitor, second resonant capacitor constitute resonant structure;The negative output end of the secondary winding of transformer is connected to the input end and the output end of voltage stabilizing module through rectifying unit, and the output end of voltage stabilizing module is used to output drive voltage, to effectively suppress noise interference, and simplify design, reduce overall cost.

Description

Technical Field

[0001] This application relates to the field of power device drive power supply technology, and more specifically, to a single-tube power device drive power supply device. Background Technology

[0002] Currently, in the application of single-transistor power devices, their rapid turn-on and turn-off processes require large pulse currents. Therefore, each single-transistor power device is usually configured with a separate power supply scheme. However, existing schemes mostly adopt hard switching, which generates large voltage change rate (dv / dt) and current change rate (di / dt) when the power supply is working, thus generating a large number of high-frequency harmonics. These harmonics propagate through surrounding lines and space, easily causing interference to other equipment. Especially in scenarios with a large number of single-transistor power devices, such as photovoltaic energy storage inverters, a large number of power supplies are required. The filters added to suppress noise interference are not only large in size, but also increase the overall cost. Utility Model Content

[0003] The purpose of this application is to provide a single-tube power device drive power supply device that can effectively suppress noise interference, simplify design, and reduce overall cost.

[0004] This application provides a single-transistor power device driving power supply device, including: a driver chip, a transformer, a rectifier unit, a first resonant capacitor, a second resonant capacitor, and a voltage regulator module; wherein, the driver chip has a voltage input terminal, a first drive output terminal, and a second drive output terminal, the voltage input terminal being used to connect to an external DC power supply, and the second drive output terminal being grounded; the transformer includes a primary winding and a secondary winding, the positive input terminal of the primary winding being connected to the first drive output terminal of the driver chip, the negative input terminal of the primary winding being grounded, the positive output terminal of the secondary winding being connected to the input and output terminals of the voltage regulator module through the first resonant capacitor and the second resonant capacitor respectively, so that the parasitic leakage inductance of the secondary winding forms a resonant structure with the first resonant capacitor and the second resonant capacitor; the negative output terminal of the secondary winding being connected to the input and output terminals of the voltage regulator module through the rectifier unit, and the output terminal of the voltage regulator module being used to output a driving voltage.

[0005] Furthermore, it also includes: a first filter capacitor and a second filter capacitor; the positive terminal of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the negative terminal of the first filter capacitor is connected to the noise suppression terminal of the voltage regulator module; the positive terminal of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the negative terminal of the second filter capacitor is connected to the output terminal of the voltage regulator module.

[0006] Furthermore, the rectifier unit includes: a first rectifier diode and a second rectifier diode; the positive terminal of the first rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the negative terminal of the first rectifier diode is connected to the input terminal of the voltage regulator module; the negative terminal of the second rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the positive terminal of the second rectifier diode is connected to the output terminal of the voltage regulator module.

[0007] Furthermore, the driver chip integrates a first switch and a second switch. The first switch is connected to the first driver output terminal, and the second switch is connected to the second driver output terminal. When the driver chip is at a high level, the first switch is closed and the second switch is open. When the driver chip is at a low level, the first switch is open and the second switch is closed.

[0008] Furthermore, when the first switch is closed and the second switch is open, the driver chip outputs a fixed duty cycle signal through the first driver output terminal to make the resonant structure form a positive voltage resonant circuit.

[0009] Furthermore, the first switch is turned off, the second switch is turned on, and the driver chip is grounded through the second driver output terminal, so that the resonant structure forms a negative voltage resonant circuit.

[0010] Furthermore, both the first and second filter capacitors are electrolytic capacitors. One end of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the other end is connected to the noise suppression terminal of the voltage regulator module. One end of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the other end is connected to the output terminal of the voltage regulator module.

[0011] Furthermore, the voltage regulator module includes a voltage regulator circuit composed of a resistor, a Zener diode, and a capacitor. The input terminal of the voltage regulator circuit is connected to the output terminal of the rectifier unit, and the output terminal is connected to a filter circuit formed by a first filter capacitor and a second filter capacitor.

[0012] Furthermore, the driving voltage is: the output voltage that is stabilized in a preset linear region after being rectified by the first rectifier diode or the second rectifier diode, and then regulated by the voltage regulator module and filtered by the first filter capacitor and the second filter capacitor.

[0013] Furthermore, the driver chip integrates an anti-parallel diode. The anode of the anti-parallel diode is connected to the first circuit node inside the driver chip, and the cathode is connected to the second circuit node inside the driver chip to form a reverse freewheeling path.

[0014] As can be seen from the above, the single-transistor power device drive power supply device provided in this application, by setting up a drive chip, transformer, rectifier unit, first resonant capacitor, second resonant capacitor and voltage regulator module, utilizes the parasitic leakage inductance of the secondary winding of the transformer to form a resonant structure with the first resonant capacitor and the second resonant capacitor. Combined with the chopping control of the input voltage by the drive chip, it realizes open-loop LLC soft-switching technology, which effectively reduces the voltage change rate (dv / dt) and current change rate (di / dt) when the power supply is working, reduces the generation of high-frequency harmonics, and thus reduces noise interference to surrounding equipment. At the same time, it eliminates the need to configure a large number of large filters to suppress interference, which helps to reduce the size of the overall device and reduce costs. Moreover, through the cooperation of the rectifier unit and voltage regulator module, it can stably output drive voltage to meet the pulse current requirements of the single-transistor power device during rapid turn-on and turn-off. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a circuit diagram of the single-transistor power device driving power supply device in this application;

[0017] Figure 2 This is a circuit diagram of a single-transistor power device drive power supply device in this application, in which a rectifier diode is provided;

[0018] Figure 3 This is a circuit diagram showing the setting of a filter capacitor in the single-tube power device drive power supply device of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0023] In existing technologies, the rapid turn-on and turn-off processes of single-transistor power devices require large pulse currents. Therefore, each single-transistor power device is usually equipped with a separate power supply scheme. However, existing schemes mostly use hard switching, which generates large voltage change rate (dv / dt) and current change rate (di / dt) when the power supply is working, resulting in a large number of high-frequency harmonics. These harmonics propagate through surrounding lines and space, easily causing interference to other equipment. Especially in scenarios with a large number of single-transistor power devices, such as photovoltaic energy storage inverters, a large number of power supplies are required. The filters added to suppress noise interference are not only large in size, but also increase the overall cost.

[0024] To address the aforementioned issues, the purpose of this application is to provide a single-tube power device drive power supply device that can effectively suppress noise interference, simplify design, and reduce overall cost.

[0025] Therefore, refer to Figure 1 , Figure 1This is a circuit diagram of the single-transistor power device driving power supply device in this application; wherein, the voltage input terminal of the driver chip is connected to an external DC power supply, and resonant capacitor 1 and resonant capacitor 2 are the first resonant capacitor and the second resonant capacitor, connected between the positive output terminal of the transformer secondary and the voltage regulator module; this application provides a single-transistor power device driving power supply device, including: a driver chip, a transformer, a rectifier unit, a first resonant capacitor, a second resonant capacitor, and a voltage regulator module; wherein, the driver chip has a voltage input terminal, a first drive output terminal, and a second drive output terminal, and the voltage input terminal is used to connect to an external DC power supply. The power supply has its second drive output terminal grounded. The transformer includes a primary winding and a secondary winding. The positive input terminal of the primary winding is connected to the first drive output terminal of the drive chip, and the negative input terminal of the primary winding is grounded. The positive output terminal of the secondary winding is connected to the input and output terminals of the voltage regulator module via a first resonant capacitor and a second resonant capacitor, respectively, so that the parasitic leakage inductance of the secondary winding forms a resonant structure with the first and second resonant capacitors. The negative output terminal of the secondary winding is connected to the input and output terminals of the voltage regulator module via a rectifier unit. The output terminal of the voltage regulator module is used to output the drive voltage.

[0026] Among them, the driver chip refers to an integrated circuit with dual-output control, which controls the direction of the primary winding current by alternating conduction states; the transformer refers to an energy transfer and voltage conversion device, in which the parasitic leakage inductance of the secondary winding is used as a component of the resonant structure; the rectifier unit refers to a current direction control device, used to convert the secondary alternating current into a unidirectional pulsating current; the first resonant capacitor and the second resonant capacitor refer to energy storage and resonant elements, which together with the parasitic leakage inductance of the transformer secondary winding form a resonant structure to absorb high-frequency harmonic energy; the voltage regulator module refers to a voltage regulation device, used to eliminate voltage fluctuations after rectification and maintain output stability.

[0027] Specifically, after receiving external DC power, the driver chip inputs a pulse signal to the primary winding of the transformer through the first driver output terminal. Changes in the primary current induce an alternating voltage in the secondary winding. The parasitic leakage inductance of the secondary winding, along with the first and second resonant capacitors, forms a resonant structure. When the driver chip outputs a high level, the primary winding current rises, and the secondary resonant structure operates in the positive half-cycle, with energy transferred to the voltage regulator module through the rectifier unit. When the driver chip outputs a low level, the primary winding current decreases, and the secondary resonant structure operates in the negative half-cycle, with residual energy being cyclically consumed through the resonant capacitors. The voltage regulator module smooths the rectified pulsating voltage, outputting a stable drive voltage.

[0028] It is understood that the single-transistor power device drive power supply device provided in this application, by setting up a drive chip, transformer, rectifier unit, first resonant capacitor, second resonant capacitor and voltage regulator module, utilizes the parasitic leakage inductance of the secondary winding of the transformer to form a resonant structure with the first resonant capacitor and the second resonant capacitor. Combined with the chopping control of the input voltage by the drive chip, it realizes open-loop LLC soft-switching technology, which effectively reduces the voltage change rate (dv / dt) and current change rate (di / dt) during power supply operation, reduces the generation of high-frequency harmonics, and thus reduces noise interference to surrounding equipment. At the same time, it eliminates the need for a large number of large filters to suppress interference, which helps to reduce the size of the overall device and reduce costs. Moreover, through the cooperation of the rectifier unit and voltage regulator module, it can stably output drive voltage to meet the pulse current requirements of the single-transistor power device during rapid turn-on and turn-off.

[0029] It is worth noting that traditional solutions rely on independent power supplies and external filters to passively absorb harmonics, while this application actively constructs a resonant network to convert high-frequency energy into circulating current within the circuit, and transforms the transformer leakage inductance into a component of the resonant network. This effectively suppresses the transmission of high-frequency harmonics during the drive power supply process, reduces dependence on external filters, and improves conversion efficiency through the recycling of resonant energy. In addition, the single transformer structure in this application also simplifies the design of multi-channel drive power supplies.

[0030] refer to Figure 2 and Figure 3 , Figure 2 This is a circuit diagram showing the rectifier diode in the single-transistor power device drive power supply device of this application. Figure 3 This is a circuit diagram of a single-tube power device drive power supply device in this application, in which a filter capacitor is set; wherein, the rectifier unit includes a first rectifier diode D1 and a second rectifier diode D2, and filter capacitor 1 and filter capacitor 2 are the first filter capacitor and the second filter capacitor.

[0031] In some embodiments, the single-tube power device driving power supply device further proposed in this application includes a first filter capacitor and a second filter capacitor; the positive terminal of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the negative terminal is connected to the noise suppression terminal of the voltage regulator module; the positive terminal of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the negative terminal is connected to the output terminal of the voltage regulator module.

[0032] The first filter capacitor is an energy storage element used to filter out high-frequency noise between the input terminal and the noise suppression terminal of the voltage regulator module; the second filter capacitor is an energy storage element used to filter out high-frequency noise between the noise suppression terminal and the output terminal of the voltage regulator module. The two capacitors are connected across the three ports of the voltage regulator module, forming a multi-stage filtering structure.

[0033] Specifically, when the driver chip outputs a high-frequency pulse signal, the alternating current generated by the secondary winding of the transformer is converted into pulsating direct current by the rectifier unit. Before entering the voltage regulator module, this direct current is absorbed by the first filter capacitor to absorb voltage fluctuations between the input and noise suppression terminals, while the second filter capacitor attenuates the residual ripple between the noise suppression and output terminals. The two capacitors are connected across the three ports of the voltage regulator module, forming a multi-stage filtering network that effectively suppresses high-frequency noise propagation along the power supply path.

[0034] In some embodiments, this application further proposes that the rectifier unit includes a first rectifier diode and a second rectifier diode; the positive terminal of the first rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the negative terminal is connected to the input terminal of the voltage regulator module; the negative terminal of the second rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the positive terminal is connected to the output terminal of the voltage regulator module.

[0035] Specifically, the first rectifier diode allows current to flow from the positive to the negative terminal when forward-biased, and can be implemented using a fast recovery diode. The second rectifier diode blocks current from flowing from the negative to the positive terminal when reverse-biased, and can be implemented using a Schottky diode. When the secondary winding of the transformer outputs a positive half-cycle voltage, the first rectifier diode conducts forward, transferring current to the input terminal of the voltage regulator module, while the second rectifier diode is reverse-biased and cut off. When the secondary winding outputs a negative half-cycle voltage, the second rectifier diode conducts forward, transferring current to the output terminal of the voltage regulator module, while the first rectifier diode is reverse-biased and cut off. Full-wave rectification is achieved by alternating conduction of the two rectifier diodes. Simultaneously, the parasitic leakage inductance of the secondary winding and the resonant capacitor form a resonant structure, reducing switching losses.

[0036] In some embodiments, this application further proposes that the driver chip integrates a first switch and a second switch, the first switch being connected to a first drive output terminal and the second switch being connected to a second drive output terminal; when the driver chip is at a high level, the first switch is closed and the second switch is open; when the driver chip is at a low level, the first switch is open and the second switch is closed.

[0037] The first switching transistor is a semiconductor device that controls the current path of the driver chip when it is at a high level. It can be implemented using a MOSFET or IGBT and is used to connect the primary winding to the external power supply when the drive signal is high. The second switching transistor is a semiconductor device that controls the current path of the driver chip when it is at a low level. It can be implemented using a power device of the same type as the first switching transistor and is used to establish the connection between the primary winding and ground when the drive signal is low.

[0038] Specifically, when the driver chip is at a high level, the first switch is closed, creating a conduction path between the first driver output terminal and the external DC power supply, while the second switch is open. The primary winding receives positive excitation, and the secondary winding transfers energy through a resonant structure. When the driver chip is at a low level, the first switch is open, and the second switch is closed, grounding the second driver output terminal. This creates a freewheeling path for the primary winding current, and the secondary winding generates reverse resonant energy.

[0039] In some embodiments, this application further proposes that when the first switch is closed and the second switch is open, the driver chip outputs a fixed duty cycle signal through the first driver output terminal, so that the resonant structure forms a positive voltage resonant circuit.

[0040] Among them, the fixed duty cycle signal refers to a periodic electrical signal with a constant ratio of on and off time. Specifically, it can be generated by the pulse width modulation controller integrated inside the driver chip. The positive voltage resonant circuit refers to the current oscillation path formed by the parasitic leakage inductance of the secondary winding of the transformer and the first and second resonant capacitors. Specifically, the voltage polarity is positively superimposed through the capacitor charging and discharging process, thereby forming a stable positive voltage output at the input of the voltage regulator module.

[0041] Specifically, when the first switch is closed, the external DC power supply injects electrical energy into the primary winding of the transformer through the first drive output terminal, and the secondary winding induces an alternating voltage; the fixed duty cycle signal controls the on and off of the current in the primary winding, so that the parasitic leakage inductance of the secondary winding resonates with the first and second resonant capacitors to form a positive voltage resonant circuit, which is transmitted to the voltage regulator module through the rectifier unit.

[0042] In some embodiments, this application further proposes that when the first switch is turned off and the second switch is turned on, the driver chip is grounded through the second driver output terminal, so that the resonant structure forms a negative voltage resonant circuit.

[0043] Among them, the negative voltage resonant circuit refers to the oscillation circuit composed of the parasitic leakage inductance of the secondary winding of the transformer and the first resonant capacitor and the second resonant capacitor.

[0044] Specifically, when the driver chip is at a low level, the first switch is turned off and the second switch is closed to ground the second driver output terminal; the energy stored in the secondary winding of the transformer is transferred to the voltage regulator module through the rectifier unit; the parasitic leakage inductance of the secondary winding resonates with the first and second resonant capacitors to form a negative voltage resonant circuit; the current decays in the form of a sine wave to avoid sudden changes.

[0045] In some embodiments, this application further proposes that the first filter capacitor and the second filter capacitor are both electrolytic capacitors. One end of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the other end is connected to the noise suppression terminal of the voltage regulator module. One end of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the other end is connected to the output terminal of the voltage regulator module.

[0046] Specifically, before the pulsating DC power output from the transformer and rectifier unit enters the voltage regulator module, the first filter capacitor absorbs the voltage fluctuations between the input terminal and the noise suppression terminal, and the second filter capacitor performs secondary attenuation on the residual ripple between the noise suppression terminal and the output terminal, forming a multi-stage filtering structure.

[0047] In some embodiments, the noise suppression terminal of the voltage regulator module can be a dedicated pin on the module housing. This pin is connected to the grounding node in the voltage regulator circuit through internal copper foil, forming a reference potential point independent of the input and output terminals. In the external circuit, the negative terminal of the first filter capacitor and the positive terminal of the second filter capacitor are directly soldered to this pin. High-frequency noise is guided to the grounding node through the internal path of the pin, thereby achieving noise shunting.

[0048] In some embodiments, this application further proposes that the voltage regulator module includes a voltage regulator circuit composed of a resistor, a Zener diode, and a capacitor. The input terminal of the voltage regulator circuit is connected to the output terminal of the rectifier unit, and the output terminal is connected to a filter structure formed by a first filter capacitor and a second filter capacitor.

[0049] Specifically, after the pulsating DC power output from the rectifier unit enters the voltage regulator circuit, the resistor limits the amplitude of the input current, the Zener diode stabilizes the voltage at a preset value, and the capacitor absorbs high-frequency ripple. The regulated current is transmitted to the filter structure composed of the first and second filter capacitors to further eliminate residual AC components.

[0050] In some embodiments, the specific connection relationship of the voltage regulator circuit of the voltage regulator module can be as follows: one end of the resistor is connected to the output terminal of the rectifier unit, and the other end is connected to the cathode of the Zener diode and one end of the capacitor; the anode of the Zener diode and the other end of the capacitor are grounded together; the connection node of the resistor and the Zener diode serves as the output terminal of the voltage regulator circuit, and is connected to the positive terminal of the first filter capacitor, the negative terminal of the second filter capacitor, and the external load, respectively. Voltage stability is achieved through the synergistic effect of resistor current limiting, reverse breakdown clamping of the Zener diode, and high-frequency filtering of the capacitor.

[0051] In some embodiments, this application further proposes that the driving voltage is the voltage and current rectified by the first rectifier diode or the second rectifier diode, which are then regulated by the voltage regulator module and filtered by the first filter capacitor and the second filter capacitor in sequence, and the output voltage is stabilized in a preset linear region.

[0052] Specifically, the AC voltage of the secondary winding of the transformer is rectified by the first and second rectifier diodes, and the pulsating voltage is regulated by the voltage regulator module, then filtered by the first and second filter capacitors, and finally outputs a driving voltage that is stable in the preset linear region.

[0053] Understandably, when the driver chip outputs a high level: the first switch is closed and the second switch is open; the primary winding is energized, and the secondary winding is induced with voltage; the resonant structure forms a positive voltage resonant circuit, and the current is rectified by the first rectifier diode and then transmitted to the voltage regulator module. When the driver chip outputs a low level: the first switch is open and the second switch is closed; the primary winding freewheels, and the secondary winding generates a reverse electromotive force; the resonant structure forms a negative voltage resonant circuit, and the current is rectified by the second rectifier diode and then transmitted to the voltage regulator module. After rectification, the voltage is regulated by the voltage regulator module and filtered by the filter capacitor, resulting in a stable drive voltage within the preset linear region.

[0054] It is worth noting that the working process of the single-transistor power device drive power supply device in this application can be as follows: After receiving the external DC power supply, the driver chip chops the input voltage and outputs a square wave signal with a fixed duty cycle (45%); when the driver chip is at a high level, the internal first switch is closed and the second switch is open, and a signal is input to the primary winding of the transformer through the first drive output terminal. The primary signal is transmitted to the secondary side through the transformer. The parasitic leakage inductance of the secondary winding, together with the first resonant capacitor and the second resonant capacitor, forms a positive voltage resonant circuit. The voltage and current generated by the resonance are rectified by the first rectifier diode. The output voltage is stabilized within a preset linear region by sequentially passing through a voltage regulator module and filtering by the first and second filter capacitors. When the driver chip is at a low level, the first internal switch is open and the second switch is closed, and the second drive output terminal is grounded. The parasitic leakage inductance of the transformer secondary winding forms a negative voltage resonant circuit with the first and second resonant capacitors. The voltage and current generated by the resonance are rectified by the second rectifier diode and then sequentially passed through the voltage regulator module and filtering by the first and second filter capacitors to stabilize the output voltage within a preset linear region, thereby improving the stability of the output voltage.

[0055] In some embodiments, this application further proposes that the driver chip integrates an anti-parallel diode, the anode of which is connected to a first circuit node inside the driver chip, and the cathode of which is connected to a second circuit node inside the driver chip, to form a reverse freewheeling path.

[0056] Specifically, when the driver chip controls the first switch to be turned off and the second switch to be turned on, the reverse electromotive force generated by the sudden change in the primary winding current forms a low-impedance path through the reverse parallel diode, thereby realizing the rapid discharge of reverse current and avoiding the influence of voltage spikes.

[0057] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A power supply device for driving a single-transistor power device, characterized in that, include: The components include a driver chip, a transformer, a rectifier unit, a first resonant capacitor, a second resonant capacitor, and a voltage regulator module; among which, The driver chip has a voltage input terminal, a first driver output terminal and a second driver output terminal. The voltage input terminal is used to connect to an external DC power supply, and the second driver output terminal is grounded. The transformer includes a primary winding and a secondary winding. The positive input terminal of the primary winding is connected to the first drive output terminal of the drive chip, and the negative input terminal of the primary winding is grounded. The positive output terminal of the secondary winding is connected to the input and output terminals of the voltage regulator module through the first resonant capacitor and the second resonant capacitor, respectively, so that the parasitic leakage inductance of the secondary winding forms a resonant structure with the first and second resonant capacitors. The negative output terminal of the secondary winding is connected to the input and output terminals of the voltage regulator module through the rectifier unit, and the output terminal of the voltage regulator module is used to output the drive voltage.

2. The single-tube power device drive power supply device according to claim 1, characterized in that, Also includes: A first filter capacitor and a second filter capacitor; the positive terminal of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the negative terminal of the first filter capacitor is connected to the noise suppression terminal of the voltage regulator module; the positive terminal of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the negative terminal of the second filter capacitor is connected to the output terminal of the voltage regulator module.

3. The single-tube power device drive power supply device according to claim 2, characterized in that, The rectifier unit includes: a first rectifier diode and a second rectifier diode; the positive terminal of the first rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the negative terminal of the first rectifier diode is connected to the input terminal of the voltage regulator module; the negative terminal of the second rectifier diode is connected to the negative output terminal of the secondary winding of the transformer, and the positive terminal of the second rectifier diode is connected to the output terminal of the voltage regulator module.

4. The single-tube power device drive power supply device according to claim 1, characterized in that, The driver chip integrates a first switch and a second switch, with the first switch connected to the first driver output terminal and the second switch connected to the second driver output terminal. When the driver chip is at a high level, the first switch is closed and the second switch is open; When the driver chip is at a low level, the first switch is turned off and the second switch is turned on.

5. The single-tube power device drive power supply device according to claim 4, characterized in that, When the first switch is closed and the second switch is open, the driver chip outputs a fixed duty cycle signal through the first driver output terminal to make the resonant structure form a positive voltage resonant circuit.

6. The single-tube power device drive power supply device according to claim 4, characterized in that, The first switch is turned off, the second switch is turned on, and the driver chip is grounded through the second driver output terminal, so that the resonant structure forms a negative voltage resonant circuit.

7. The single-tube power device drive power supply device according to claim 2, characterized in that, Both the first and second filter capacitors are electrolytic capacitors. One end of the first filter capacitor is connected to the input terminal of the voltage regulator module, and the other end is connected to the noise suppression terminal of the voltage regulator module. One end of the second filter capacitor is connected to the noise suppression terminal of the voltage regulator module, and the other end is connected to the output terminal of the voltage regulator module.

8. The single-tube power device drive power supply device according to claim 3, characterized in that, The voltage regulator module includes a voltage regulator circuit composed of a resistor, a Zener diode, and a capacitor. The input terminal of the voltage regulator circuit is connected to the output terminal of the rectifier unit, and the output terminal is connected to a filter circuit formed by a first filter capacitor and a second filter capacitor.

9. The single-tube power device drive power supply device according to claim 3, characterized in that, The driving voltage is the output voltage that is stabilized in a preset linear region after being rectified by the first rectifier diode or the second rectifier diode, and then regulated by the voltage regulator module and filtered by the first filter capacitor and the second filter capacitor.

10. The single-transistor power device drive power supply device according to claim 1, characterized in that, The driver chip integrates an anti-parallel diode. The anode of the anti-parallel diode is connected to the first circuit node inside the driver chip, and the cathode is connected to the second circuit node inside the driver chip to form a reverse freewheeling path.

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