Power tube driving module, photovoltaic optimizer and photovoltaic panel

Abstract

The utility model provides a power tube driving module, a photovoltaic optimizer and a photovoltaic panel, and belongs to the technical field of electronic circuits, and the power tube driving module comprises a power conversion circuit, a bootstrap circuit, an energy storage circuit and an energy storage circuit. The power conversion circuit comprises a first power tube and a second power tube. And the bootstrap circuit is used for charging when the second power tube is conducted so as to provide conduction voltage of the first power tube. The energy storage circuit is connected with the power supply and the bootstrap circuit, and the driving circuit is connected with the energy storage circuit and is used for accessing a pulse control signal so as to drive the energy storage circuit to charge when the pulse control signal is at a first potential and drive the energy storage circuit to discharge to the bootstrap circuit when the pulse control signal is at a second potential. Thus, the pulse control signal is repeatedly switched between the first potential and the second potential, so that the bootstrap circuit always has enough energy to drive the first power tube to be conducted, continuous conduction of the first power tube is realized, and the power conversion circuit works in a straight-through mode.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a power tube driver module, a photovoltaic optimizer, and a photovoltaic panel. Background Art

[0002] In photovoltaic systems, photovoltaic optimizers play a crucial role. Their built-in power transistor driver modules enable independent maximum power point tracking for each photovoltaic panel, thereby optimizing the system's power generation efficiency. The power transistor driver module in a photovoltaic optimizer flexibly adjusts the output voltage of the photovoltaic panels to adapt to varying lighting conditions and load requirements, ensuring that the panels always operate near their maximum power point. In some application scenarios, such as when the photovoltaic panels are unobstructed, the power transistor driver module needs to operate in pass-through mode, meaning it only conducts electricity without reducing the voltage.

[0003] At present, when the power tube driver module performs power conversion, one of the power tubes in the power tube driver module usually adopts the bootstrap capacitor to draw power. Only when the two power tubes are alternately turned on can the power tube that draws power from the bootstrap capacitor be kept turned on normally. Otherwise, the power tube that draws power from the bootstrap capacitor will not be turned on, making the power tube driver module unable to operate in the pass-through mode. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a power tube driver module, a photovoltaic optimizer and a photovoltaic panel.

[0005] In a first aspect, the present application provides a power tube driver module, comprising:

[0006] A power conversion circuit includes a first power tube and a second power tube;

[0007] a bootstrap circuit connected to a power supply and the power conversion circuit, and configured to charge when the second power tube is turned on to provide a turn-on voltage for the first power tube;

[0008] an energy storage circuit connected to the power supply and the bootstrap circuit;

[0009] A driving circuit is connected to the energy storage circuit and is used to receive a pulse control signal to drive the energy storage circuit to charge when the pulse control signal is at a first potential, and to drive the energy storage circuit to discharge to the bootstrap circuit when the pulse control signal is at a second potential.

[0010] Optionally, the power conversion circuit further includes a driver chip;

[0011] The driver chip includes a control terminal for receiving the drive signal, a first output terminal connected to the control electrode of the first power tube, a second output terminal connected to the second power tube, and an energy terminal connected to the bootstrap circuit;

[0012] The first power tube further includes a first electrode connected to the power supply and a second electrode connected to the first electrode of the second power tube; the second power tube further includes a second electrode that is grounded;

[0013] When the second power tube is turned on, the power supply charges the bootstrap circuit; when the second power tube is turned off, the bootstrap circuit discharges to the energy end, so that the first output end outputs the turn-on voltage.

[0014] Optionally, the bootstrap circuit includes a first capacitor, which includes a first end connected to the energy end and a second end connected to the first electrode of the second power tube.

[0015] Optionally, the energy storage circuit includes a second capacitor, and the second capacitor includes a first end connected to the drive circuit and the bootstrap circuit, and a second end connected to the drive circuit.

[0016] Optionally, the driving circuit includes a charging sub-circuit and a discharging sub-circuit connected to the energy storage circuit;

[0017] The charging subcircuit is configured to receive the pulse control signal and be turned on when the pulse control signal is at a first potential to start charging the energy storage circuit;

[0018] The discharge sub-circuit is used to receive the pulse control signal and be turned on when the pulse control signal is at the second potential, so as to conduct between the energy storage circuit and the bootstrap circuit.

[0019] Optionally, the charging sub-circuit includes a first switching tube; the first switching tube includes a control electrode for receiving the pulse control signal, a first electrode connected to the energy storage circuit, and a grounded second electrode.

[0020] Optionally, the charging subcircuit further includes a protection unit, and the protection unit includes a discharge diode and / or a third capacitor;

[0021] The bleeder diode includes an anode connected to the control electrode of the first switch tube and a cathode connected to the pulse control signal;

[0022] The third capacitor includes a first end connected to the control electrode of the first switch tube and a second end connected to the ground.

[0023] Optionally, the discharge sub-circuit includes a second switching tube and a photoelectric coupler;

[0024] The second switch tube includes a control electrode for receiving the pulse control signal, a first electrode connected to the power supply and the photoelectric coupler, and a grounded second electrode;

[0025] The photoelectric coupler includes an anode connected to the first electrode of the second switching tube, a grounded cathode, a collector connected to the drive circuit and the bootstrap circuit, and an emitter connected to the energy storage circuit; wherein the discharge sub-circuit also includes a delayed conduction unit, the delayed conduction unit includes a fourth capacitor, and the fourth capacitor includes a first end connected to the anode of the photoelectric coupler and a second end connected to the cathode of the photoelectric coupler.

[0026] In a second aspect, in one embodiment, the present application provides a photovoltaic optimizer, comprising a controller and the above-mentioned power tube driver module;

[0027] The controller is connected to the power tube driving module and is used to output the pulse control signal to the power tube driving module.

[0028] In a third aspect, in one embodiment, the present application provides a photovoltaic panel, comprising a photovoltaic power source, an energy output terminal, and the photovoltaic optimizer as described above;

[0029] The photovoltaic optimizer includes an input terminal connected to the photovoltaic power source and an output terminal connected to the energy output terminal.

[0030] Through the above technical solution, this application has at least the following beneficial technical effects:

[0031] When the pulse control signal is at the first potential, the energy storage circuit obtains and stores energy from the power supply. When the pulse control signal switches to the second potential, the energy storage circuit releases energy to charge the bootstrap circuit. In this way, the pulse control signal is repeatedly switched between the first potential and the second potential, so that the bootstrap circuit always has enough energy to drive the first power tube to turn on, without relying on the alternating conduction of the first power tube and the second power tube in the power conversion circuit, thereby achieving continuous conduction of the first power tube, and further achieving the power conversion circuit operating in the pass-through mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 This is a schematic diagram of a power tube driver module in one embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of a driving circuit in one embodiment of the present application;

[0035] Figure 3 This is a circuit connection diagram of a power tube driver module in one embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of a photovoltaic optimizer in one embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of a photovoltaic panel in one embodiment of the present application.

[0038] Explanation of the accompanying symbols: 1. Power conversion circuit; 2. Bootstrap circuit; 3. Energy storage circuit; 4. Driving circuit; 41. Charging sub-circuit; 42. Discharging sub-circuit. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically qualified. In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is provided to enable anyone skilled in the art to implement and use the present application. In the following description, details are listed for illustrative purposes. It should be understood that one of ordinary skill in the art will recognize that the present application can be implemented without these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0041] First, as Figure 1As shown, in one embodiment, the present application provides a power tube driving module, which includes a power conversion circuit 1, a bootstrap circuit 2, an energy storage circuit 3, and a driving circuit 4. The power conversion circuit 1 includes a first power tube M1 and a second power tube M2; the bootstrap circuit 2 is connected to the power supply VCC and the power conversion circuit 1, and is used to charge when the second power tube M2 is turned on to provide a turn-on voltage for the first power tube M1; the energy storage circuit 3 is connected to the power supply VCC and the bootstrap circuit 2; and the driving circuit 4 is connected to the energy storage circuit 3, and is used to receive a pulse control signal to drive the energy storage circuit 3 to charge when the pulse control signal is at a first potential, and to drive the energy storage circuit 3 to discharge to the bootstrap circuit 2 when the pulse control signal is at a second potential.

[0042] As an example, when the power tube driver module is applied to a photovoltaic optimizer, the power source VCC may be a photovoltaic power source, which is used to convert light energy into electrical energy for storage.

[0043] As an example, the pulse control signal may be output from an IO terminal of an external controller.

[0044] As an example, the first power transistor M1 and the second power transistor M2 can both be NMOS transistors. The first power transistor M1 and the second power transistor M2 form a half-bridge drive structure, i.e., the first power transistor M1 is an upper-arm structure, and the second power transistor M2 is a lower-arm structure. The power conversion circuit 1 steps down the output voltage of the power supply VCC to output a load voltage OUT. Specifically, within a cycle, the longer the on-time of the first power transistor M1 and the shorter the on-time of the second power transistor M2, the longer the time for the power supply VCC to output power to the load via the first power transistor M1. Therefore, the load voltage OUT output by the power conversion circuit 1 is closer to the output voltage of the power supply VCC. Conversely, when the on-time of the first power transistor M1 and the second power transistor M2 are shorter, the power supply VCC to provide power to the downstream load via the first power transistor M1 for a shorter time. Consequently, the load voltage OUT output by the power conversion circuit 1 is correspondingly lowered. In this case, the voltage reduction amplitude of the power conversion circuit 1 is relatively large. When only the first power tube M1 is turned on in a cycle, without considering line loss, the load voltage OUT output by the power conversion circuit 1 is equal to the output voltage of the power supply VCC, that is, the power conversion circuit 1 operates in the pass-through mode.

[0045] In the above embodiment, when the pulse control signal is at the first potential, the energy storage circuit 3 obtains and stores energy from the power supply VCC. When the pulse control signal switches to the second potential, the energy storage circuit 3 releases energy to charge the bootstrap circuit 2. In this way, the pulse control signal is repeatedly switched between the first potential and the second potential, so that the bootstrap circuit 2 always has sufficient energy to drive the first power tube M1 to turn on, without relying on the alternating conduction of the first power tube M1 and the second power tube M2 in the power conversion circuit 1, thereby achieving continuous conduction of the first power tube M1, and further achieving the operation of the power conversion circuit 1 in the pass-through mode.

[0046] Reference Figure 3 As an embodiment of the power conversion circuit 1, the power conversion circuit 1 also includes a driver chip U1. The driver chip U1 includes a control terminal for receiving a drive signal, a first output terminal connected to the control electrode of the first power tube M1, a second output terminal connected to the second power tube M2, and an energy terminal connected to the bootstrap circuit 2; the first power tube M1 also includes a first electrode connected to the power supply VCC and a second electrode connected to the first electrode of the second power tube M2; the second power tube M2 also includes a second electrode connected to ground.

[0047] When the second power tube M2 is turned on, the power supply VCC charges the bootstrap circuit 2 , and when the second power tube M2 is turned off, the bootstrap circuit 2 discharges to the energy terminal, so that the first output terminal outputs the conduction voltage.

[0048] The driving signal is used to control the duty cycle of the first power tube M1 and the second power tube M2 to adjust the voltage reduction amplitude.

[0049] As an example, the power conversion circuit 1 also includes an inductor L1, which includes a first end connected to the second electrode of the first power tube M1 and the first electrode of the second power tube M2, and a second end for transmitting energy to the rear-end load. When the first power tube M1 is turned on, the power supply VCC forms a path with the inductor L1 and the rear-end load through the first power tube M1, and the inductor L1 begins to store electrical energy. When current flows through the inductor L1, a magnetic field is generated, thereby storing electrical energy in the form of magnetic field energy. Because the current of the inductor L1 cannot change suddenly, the voltage at the second end of the inductor L1 does not suddenly jump at the moment the first power tube M1 is turned on, but instead gradually rises, achieving a smooth voltage transition. When the second power tube M2 is turned on, the inductor L1 begins to release its stored electrical energy, forming a complete loop through the second power tube M2 and the rear-end load to provide electrical energy to the rear-end load. This prevents the voltage at the second end of the inductor L1 from suddenly dropping at the moment the second power tube M2 is turned on, thereby achieving a smoother load voltage OUT output by the power conversion circuit 1.

[0050] Reference Figure 3 As an implementation of the bootstrap circuit 2, the bootstrap circuit 2 includes a first capacitor C1, and the first capacitor C1 includes a first end connected to the energy end and a second end connected to the first electrode of the second power tube M2.

[0051] As an example, because the first power transistor M1 is an upper-arm structure and the second power transistor M2 is a lower-arm structure, the voltages required to drive the first power transistor M1 and the second power transistor M2 are different. However, by providing a bootstrap circuit 2, only one power supply VCC is required to drive the first power transistor M1 and the second power transistor M2, without the need for additional voltage transformation structures. Specifically, during the period when the second switch Q2 is on and the first switch Q1 is off, the first capacitor C1 is charged to a turn-on voltage. When the first output terminal of the driver chip U1 needs to output a high level to turn on the first switch Q1, the energy stored in the first capacitor C1 can be equivalent to a voltage source, which serves as the turn-on voltage output by the internal driver of the driver chip U1, thereby completing the driving of the first power transistor M1.

[0052] As an implementation of the energy storage circuit 3 , the energy storage circuit 3 includes a second capacitor C2 . The second capacitor C2 includes a first end connected to the drive circuit 4 and the bootstrap circuit 2 , and a second end connected to the drive circuit 4 .

[0053] Reference Figure 3 As an embodiment of the driving circuit 4, the driving circuit 4 includes a charging sub-circuit 41 and a discharging sub-circuit 42 connected to the energy storage circuit 3; the charging sub-circuit 41 is used to receive the pulse control signal and is turned on when the pulse control signal is at a first potential to start charging the energy storage circuit 3; the discharging sub-circuit 42 is used to receive the pulse control signal and is turned on when the pulse control signal is at a second potential to enable conduction between the energy storage circuit 3 and the bootstrap circuit 2.

[0054] In the above embodiment, when the pulse control signal is at the first potential, the charging sub-circuit 41 is turned on, driving the energy tank circuit 3 to absorb energy from the power supply VCC and begin charging. When the pulse control signal switches to the second potential, the discharging sub-circuit 42 is turned on, forming a closed loop between the energy tank circuit 3 and the bootstrap circuit 2, so that the energy released by the energy tank circuit 3 charges the bootstrap circuit 2. By alternating the pulse control signal between the first and second potentials, the energy tank circuit 3 is alternately in the charging and discharging state, continuously providing energy to the bootstrap circuit 2.

[0055] As an implementation of the charging sub-circuit 41 , the charging sub-circuit 41 includes a first switch tube Q1 ; the first switch tube Q1 includes a control electrode for receiving a pulse control signal, a first electrode connected to the energy storage circuit 3 , and a grounded second electrode.

[0056] As an embodiment of the discharge sub-circuit 42, the discharge sub-circuit 42 includes a second switching tube Q2 and a photocoupler U2; the second switching tube Q2 includes a control electrode for receiving a pulse control signal, a first electrode connected to the power supply VCC and the photocoupler U2, and a grounded second electrode; the photocoupler U2 includes an anode connected to the first electrode of the second switching tube Q2, a grounded cathode, a collector connected to the drive circuit 4 and the bootstrap circuit 2, and an emitter connected to the energy storage circuit 3.

[0057] As an example, the first potential of the pulse control signal can be a high level potential, and the second potential can be a low level potential. The first switch tube Q1 and the second switch tube Q2 can be NMOS tubes. When the pulse control signal is at the first potential, the first switch tube Q1 is turned on, grounding the second capacitor C2, thereby causing the power supply VCC to begin charging the second capacitor C2; the second switch tube Q2 is turned on to pull down the anode of the photocoupler U2, turning off the photocoupler U2, that is, disconnecting the second capacitor C2 from the first capacitor C1. When the pulse control signal is at the second potential, the first switch tube Q1 is turned off, disconnecting the second capacitor C2 from ground; the second switch tube Q2 is turned off, causing the output voltage of the power supply VCC to flow to the anode of the photocoupler U2, turning on the photocoupler U2, thereby connecting the second capacitor C2 to the first capacitor C1, and the second capacitor C2 charging the first capacitor C1.

[0058] In the above embodiment, through the cooperation of the first switch tube Q1, the second switch tube Q2 and the photocoupler U2, it is achieved that the power supply VCC charges the second capacitor C2 when the pulse control signal is at the first potential, and the second capacitor C2 discharges to the first capacitor C1 when the pulse control signal is at the second potential.

[0059] If the discharge sub-circuit 42 and the charging sub-circuit 41 are turned on at the same time, the first power tube M1 and the second power tube M2 will be directly grounded, resulting in a short circuit. Figure 3 The charging sub-circuit 41 further includes a protection unit, which includes a bleeder diode D and / or a third capacitor C3; wherein the bleeder diode D includes an anode connected to the control electrode of the first switch tube Q1 and a cathode connected to the pulse control signal; the third capacitor C3 includes a first end connected to the control electrode of the first switch tube Q1 and a second end connected to the ground.

[0060] Reference Figure 3 As a further embodiment of the discharge sub-circuit 42, the discharge sub-circuit 42 further includes a delayed turn-on unit, the delayed turn-on unit includes a fourth capacitor C4, and the fourth capacitor C4 includes a first end connected to the anode of the photocoupler U2 and a second end connected to the cathode of the photocoupler U2.

[0061] For example, when the pulse control signal transitions to the initial stage of the first potential, the pulse control signal charges the third capacitor C3 connected to the control electrode of the first switch tube Q1. The first switch tube Q1 will not turn on until the voltage of the third capacitor C3 reaches the turn-on voltage of the first switch tube Q1, thereby delaying the turn-on of the first switch tube Q1. At this time, the second switch tube Q2 is quickly turned on by the pulse control signal of the first potential, quickly pulling down the voltage at the anode of the optocoupler U2, causing the optocoupler U2 to be quickly turned off.

[0062] When the pulse control signal transitions to the initial stage of the second potential, the second switch Q2 turns off, and the output voltage of the power supply VCC charges the fourth capacitor C4 until the fourth capacitor C4 is charged to the turn-on voltage of the photocoupler U2, turning on the photocoupler U2, thereby delaying the turn-on of the photocoupler U2. At this time, because the second potential of the pulse control signal is lower than the control electrode voltage of the first switch Q1, the bleeder diode D turns on, discharging the control electrode of the first switch Q1 and accelerating the turn-off speed of the first switch Q1.

[0063] In the above embodiment, when the pulse control signal changes to the first potential, the turn-on of the first switch Q1 is delayed, while the turn-off of the photocoupler U2 is accelerated. When the pulse control signal changes to the second potential, the turn-on of the photocoupler U2 is delayed, while the turn-off of the first switch Q1 is accelerated. This prevents the first switch Q1 and the photocoupler U2 from being turned on simultaneously. In other words, the discharge sub-circuit 42 and the charge sub-circuit 41 are not turned on simultaneously, thereby avoiding the safety hazard caused by the short-circuit current caused by the simultaneous turn-on of the discharge sub-circuit 42 and the charge sub-circuit 41.

[0064] Furthermore, this embodiment only requires one pulse control signal, and the accuracy requirements for the pulse control signal are relatively low. This means that the discharge sub-circuit 42 and the charge sub-circuit 41 are alternately turned on through hardware, preventing them from being turned on simultaneously. Compared to using two pulse control signals with opposite phases to control the discharge sub-circuit 42 and the charge sub-circuit 41 separately, this approach not only saves pin resources on the controller used to output the pulse control signal, but also eliminates the need to adjust the two pulse control signals separately through software to create dead time to prevent the discharge sub-circuit 42 and the charge sub-circuit 41 from being turned on simultaneously.

[0065] Secondly, refer to Figure 4 In one embodiment, the present application provides a photovoltaic optimizer, comprising a controller and the above-mentioned power tube driving module; the controller is connected to the power tube driving module and is used to output the pulse control signal to the power tube driving module.

[0066] As an example, a pulse control signal may be output to the power tube driving module through the IO terminal of the controller.

[0067] Thirdly, refer to Figure 5 In one embodiment, the present application provides a photovoltaic panel comprising a photovoltaic power source, an energy output terminal, and a photovoltaic optimizer as described above. The photovoltaic optimizer comprises an input terminal connected to the photovoltaic power source and an output terminal connected to the energy output terminal.

[0068] As an example, the energy connection terminal can be used to connect a transformer to a voltage suitable for operating a downstream load.

[0069] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be replaced with each other in the absence of conflict. The technical features of the above embodiments can be combined arbitrarily. To keep the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A power tube driver module, characterized in that: include: A power conversion circuit includes a first power tube and a second power tube; a bootstrap circuit connected to a power supply and the power conversion circuit, and configured to charge when the second power tube is turned on to provide a turn-on voltage for the first power tube; an energy storage circuit connected to the power supply and the bootstrap circuit; A driving circuit is connected to the energy storage circuit and is used to receive a pulse control signal to drive the energy storage circuit to charge when the pulse control signal is at a first potential, and to drive the energy storage circuit to discharge to the bootstrap circuit when the pulse control signal is at a second potential.

2. The power tube driver module according to claim 1, characterized in that: The power conversion circuit also includes a driver chip; The driver chip includes a control terminal for receiving a driving signal, a first output terminal connected to the control electrode of the first power tube, a second output terminal connected to the second power tube, and an energy terminal connected to the bootstrap circuit; The first power tube further includes a first electrode connected to the power supply and a second electrode connected to the first electrode of the second power tube; the second power tube further includes a second electrode that is grounded; When the second power tube is turned on, the power supply charges the bootstrap circuit; when the second power tube is turned off, the bootstrap circuit discharges to the energy end, so that the first output end outputs the turn-on voltage.

3. The power tube driving module according to claim 2, characterized in that: The bootstrap circuit includes a first capacitor, which includes a first end connected to the energy end and a second end connected to the first electrode of the second power tube.

4. The power tube driver module according to claim 1, wherein: The energy storage circuit includes a second capacitor including a first end connected to the driving circuit and the bootstrap circuit and a second end connected to the driving circuit.

5. The power tube driver module according to claim 1, characterized in that: The driving circuit includes a charging subcircuit and a discharging subcircuit connected to the energy storage circuit; The charging subcircuit is configured to receive the pulse control signal and be turned on when the pulse control signal is at a first potential to start charging the energy storage circuit; The discharge sub-circuit is used to receive the pulse control signal and be turned on when the pulse control signal is at the second potential, so as to conduct between the energy storage circuit and the bootstrap circuit.

6. The power tube driving module according to claim 5, characterized in that: The charging subcircuit includes a first switching tube; the first switching tube includes a control electrode for receiving the pulse control signal, a first electrode connected to the energy storage circuit, and a grounded second electrode.

7. The power tube driving module according to claim 6, characterized in that: The charging subcircuit further includes a protection unit, wherein the protection unit includes a discharge diode and / or a third capacitor; The bleeder diode includes an anode connected to the control electrode of the first switch tube and a cathode connected to the pulse control signal; The third capacitor includes a first end connected to the control electrode of the first switch tube and a second end connected to the ground.

8. The power tube driving module according to claim 5, characterized in that: The discharge sub-circuit includes a second switching tube and a photoelectric coupler; The second switch tube includes a control electrode for receiving the pulse control signal, a first electrode connected to the power supply and the photoelectric coupler, and a grounded second electrode; The photoelectric coupler includes an anode connected to the first electrode of the second switch tube, a grounded cathode, a collector connected to the drive circuit and the bootstrap circuit, and an emitter connected to the energy storage circuit; The discharge subcircuit further includes a delayed turn-on unit, the delayed turn-on unit includes a fourth capacitor, and the fourth capacitor includes a first end connected to the anode of the photocoupler and a second end connected to the cathode of the photocoupler.

9. A photovoltaic optimizer, characterized in that: It comprises a controller and a power tube driving module according to any one of claims 1 to 8; The controller is connected to the power tube driving module and is used to output the pulse control signal to the power tube driving module.

10. A photovoltaic panel, characterized in that: comprising a photovoltaic power source, an energy output terminal, and the photovoltaic optimizer according to claim 9; The photovoltaic optimizer includes an input terminal connected to the photovoltaic power source and an output terminal connected to the energy output terminal.

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