Driving circuit of power device and vehicle

Abstract

The invention relates to a driving circuit of a power device and a vehicle. The driving circuit of the power device comprises a control module used for outputting a pulse width modulation signal; the signal processing module is connected with the control module and is used for outputting a first control signal and a second control signal according to the pulse width modulation signal; the resonance module comprises a plurality of gathering branch circuits, and the first end of each gathering branch circuit is connected with the grid electrode of the power device; and the driving module is respectively connected with the signal processing module and the second end of each set total branch, and is used for selectively conducting a target set total branch according to the first control signal and the second control signal and outputting a driving signal so as to drive a power device. Wherein the target set total branch is one of the plurality of set total branches, and different set total branches output different driving signals. By adopting the power device driving circuit provided by the invention, the positive crosstalk and the negative crosstalk of the device can be obviously reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power device drive circuits, and in particular to a power device drive circuit and a vehicle. Background Art

[0002] In new energy vehicles, multiple power devices are usually used to form a full-bridge or half-bridge drive circuit. The parasitic capacitance of the power device (mainly Miller capacitance) may cause crosstalk problems to other power devices in the bridge structure at high switching frequencies. Under the influence of the crosstalk problem, the gate of the power device may be mis-turned on, which in turn causes the bridge arm to be turned on, resulting in power device failure. Summary of the invention

[0003] Based on this, it is necessary to provide a driving circuit and vehicle for a power device that can effectively alleviate the crosstalk problem of the power device.

[0004] In a first aspect, the present application provides a driving circuit for a power device, comprising:

[0005] A control module, used for outputting a pulse width modulation signal;

[0006] A signal processing module, connected to the control module, configured to output a first control signal and a second control signal according to the pulse width modulation signal;

[0007] The resonant module comprises a plurality of lumped branches, wherein the first end of each lumped branch is respectively connected to the gate of the power device;

[0008] A driving module is respectively connected to the signal processing module and the second end of each of the lumped branches, and is used to select and turn on a target lumped branch and output a driving signal according to the first control signal and the second control signal to drive the power device and suppress gate voltage crosstalk of the power device; wherein the target lumped branch is one of the multiple lumped branches, and different lumped branches output different driving signals.

[0009] In one embodiment, the resonance module includes: a first resonant inductor, a first resistor, a second resonant inductor and a second resistor, the first end of the first resonant inductor is connected to the first driving port of the driving module, the second end of the first resonant inductor is respectively connected to the second driving port of the driving module and the first end of the first resistor, the second end of the first resistor is respectively connected to the gate of the power device and the first end of the second resistor, the first end of the second resonant inductor is connected to the third driving port of the driving module, and the second end of the second resonant inductor is respectively connected to the fourth driving port of the driving module and the first end of the second resistor;

[0010] The multiple lumped branches include a first resonant branch, a second resonant branch and an impedance branch, wherein the first resonant inductor, the first resistor and the second resistor constitute the first resonant branch, the first resistor and the second resistor constitute the impedance branch, and the second resonant inductor, the first resistor and the second resistor constitute the second resonant branch.

[0011] In one embodiment, the driving module is used to select and turn on the first resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the first resonant inductor when the first control signal is at a first level and the second control signal is at a second level; wherein the first level and the second level are different;

[0012] and when the first control signal is at the second level and the second control signal is at the first level, selectively turning on the second resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the second resonant inductor;

[0013] And, when the first control signal is at the second level and the second control signal is at the second level, the second impedance branch is selectively turned on to drive the power device and clamp the gate voltage of the power device.

[0014] In one embodiment, the driving module at least includes a first control port, a second control port and a plurality of driving ports, the first control port and the second control port are respectively connected to the signal processing module, the first control port is used to transmit the first control signal, the second control port is used to transmit the second control signal, the driving port is connected to the lumped branch, and different driving ports are connected to different lumped branches;

[0015] The driving module is used for selecting and conducting a target driving port according to the first control signal and the second control signal, so as to conduct the target lumped branch connected to the target driving port.

[0016] In one embodiment, the signal processing module is used to output a first control signal of a first level and a second control signal of a second level when the pulse width modulation signal is a first level signal, and after the first control signal maintains the first level for a first preset time, flip the first control signal to the second level;

[0017] The signal processing module is also used to first output the first control signal of the second level and the second control signal of the first level when the pulse width modulation signal is a second level signal, and after the second control signal maintains the first level for a second preset time, flip the second control signal to the second level.

[0018] In one embodiment, the signal processing module includes:

[0019] The first delay level flip unit includes a first power switch tube, a third resistor, a fourth resistor, a first comparator, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor, wherein the gate of the first power switch tube is connected to the control module, the drain of the first power tube is connected to VCC, and the source of the first power switch tube is connected to the first end of the third resistor; the first end of the fourth resistor is respectively connected to the second end of the third resistor, the in-phase input end of the first comparator, and the first end of the fifth resistor, and the second end of the fourth resistor is grounded; the inverting input end of the first comparator is respectively connected to the first end of the first capacitor and the first end of the sixth resistor, and the output end of the first comparator is respectively connected to the second end of the fifth resistor, the second end of the sixth resistor, and the first end of the seventh resistor; the second end of the first capacitor is grounded, and the second end of the seventh resistor is connected to the first control end of the driving module;

[0020] The second delay level flip unit includes a second power switch tube, a third power switch tube, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second comparator and a second capacitor, wherein the gate of the second power switch tube is connected to the control module, the drain of the second power switch tube is respectively connected to the first end of the eighth resistor and the gate of the third power switch tube, the source of the second power switch tube is grounded, and the second end of the eighth resistor is connected to VCC; the drain of the third power switch tube is connected to VCC, and the source of the third power switch tube is connected to the first end of the ninth resistor; the first end of the tenth resistor is respectively connected to the second end of the ninth resistor, the in-phase input end of the second comparator, and the first end of the eleventh resistor, and the second end of the tenth resistor is grounded; the inverting input end of the second comparator is respectively connected to the first end of the second capacitor and the first end of the twelfth resistor, and the output end of the second comparator is respectively connected to the second end of the eleventh resistor, the second end of the twelfth resistor, and the first end of the thirteenth resistor; the second end of the second capacitor is grounded, and the second end of the thirteenth resistor is connected to the second control end of the driving module.

[0021] In one embodiment, the first delay level flip unit is used to output a high-level first control signal first when the pulse width modulation signal is at a high level, and flip the first control signal to a low level after the first control signal maintains a high level for the first preset time; wherein the first preset time is the charging time of the first capacitor;

[0022] The first delay level flip unit is further configured to output a first control signal at a low level when the pulse width modulation signal is at a low level.

[0023] In one of the embodiments, the second delay level flip unit is used to output a second control signal of a low level when the pulse width modulation signal is at a high level;

[0024] The second delay level flipping unit is also used to output a high-level second control signal first when the pulse width modulation signal is at a low level, and flip the second control signal to a low level after the second control signal maintains the high level for the second preset time; the second preset time is the charging time of the second capacitor.

[0025] In one embodiment, the power device driving circuit further includes:

[0026] The power supply is connected to the control module, the signal processing module and the driving module respectively, and is used to provide corresponding working voltages for the control module, the signal processing module and the driving module.

[0027] In a second aspect, the present application also provides a vehicle, comprising a power device and a power device driving circuit provided by any of the above embodiments.

[0028] In the above-mentioned power device driving circuit and vehicle, the power device driving circuit includes a control module, a signal processing module, a resonance module and a driving module. The resonance module includes a plurality of lumped branches, and the first end of each lumped branch is respectively connected to the gate of the power device. The control module outputs a PWM signal to the signal processing module according to the required time for turning on and off the power device, and the signal processing module outputs a first control signal and a second control signal according to the PWM signal. Further, the driving module selects to turn on the target lumped branch according to the first control signal and the second control signal and outputs a corresponding driving signal to the gate of the power device to drive the power device and suppress the crosstalk of the gate voltage of the power device, so that the crosstalk voltage of the power device in the first turn-on stage and the first turn-off stage is significantly reduced, reducing the risk of other power devices in the bridge circuit being mis-turned on and broken down by negative voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] FIG1 is a schematic structural diagram of a driving circuit of a power device according to an embodiment;

[0031] Figure 2 A schematic diagram of the structure of pulse width modulation according to an embodiment;

[0032] Figure 3 is a schematic structural diagram of a driving module according to an embodiment;

[0033] Figure 4 FIG. 4 is a schematic diagram of the structure of a signal processing module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0037] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0038] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0039] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0040] In one embodiment, as shown in FIG1 , the present application provides a power device driving circuit, including a control module 100, a signal processing module 200, a resonance module 400 and a driving module 300. The control module 100 is used to output a pulse width modulation (PWM) signal. The PWM signal is an electrical signal with an adjustable duty cycle. Exemplarily, when the PWM signal is at a high level, the power device is in the on stage; when the PWM signal is at a low level, the power device is in the off stage. The duty cycle of the PWM signal can reflect the ratio of the on time to the off time of the power device.

[0041] The signal processing module 200 is used to output a first control signal and a second control signal according to a pulse width modulation signal. The resonance module 400 includes a plurality of lumped branches, and the first end of each lumped branch is respectively connected to the gate of the power device. The impedance of different lumped branches is different. The driving module 300 is used to select and turn on the target lumped branch according to the first control signal and the second control signal, and output a driving signal to drive the power device and suppress the gate voltage crosstalk of the power device. Among them, the target lumped branch is one of the plurality of lumped branches, and different lumped branches output different driving signals.

[0042] In the embodiment of the present application, the turn-on stage of the power device is divided into a first turn-on stage and a second turn-on stage, the first turn-on stage is the process in which the gate voltage of the power device rises from zero to the fully turned-on voltage, and the second turn-on stage is the stage in which the gate voltage of the power device remains stable. Correspondingly, the turn-off stage of the power device is divided into a first turn-off stage and a second turn-off stage, the first turn-off stage is the stage in which the gate voltage of the power device drops from the fully turned-on voltage to zero, and the second turn-off stage is the stage in which the gate voltage of the power device remains at zero or a negative voltage.

[0043] In different turn-on stages and different turn-off stages of the power device, the level states of the first control signal and the second control signal are different. The driving module 300 can select the target lumped branch to be turned on according to the level states of the first control signal and the second control signal, and change the impedance of the gate and source of the power device, so that in the first turn-on stage and the first turn-off stage of the power device, the loop composed of the power device and the lumped branch operates at the resonant frequency, thereby reducing the crosstalk of the power device, and in the second turn-on stage and the second turn-off stage of the power device, the gate and source of the power device are low impedance, so that the gate voltage of the power device remains stable.

[0044] In the embodiment of the present application, the driving circuit of the power device includes a control module 100, a signal processing module 200, a resonance module 400 and a driving module 300. The control module 100 outputs a PWM signal to the signal processing module 200 according to the required time of turning on and off the power device, and the signal processing module 200 outputs a first control signal and a second control signal according to the PWM signal. Further, the driving module 300 selects to turn on the target lumped branch according to the first control signal and the second control signal and outputs a corresponding driving signal to drive the power device and suppress the gate voltage crosstalk of the power device, so that the crosstalk voltage of the power device in the first turn-on stage and the first turn-off stage is significantly reduced, reducing the risk of other power devices in the bridge circuit being mis-turned on and being broken down by negative voltage.

[0045] In one embodiment, Figure 2 As shown, the resonance module 400 includes a first resonance inductor Lr1, a first resistor R1, a second resonance inductor Lr2, and a second resistor R2. The first end of the first resonance inductor Lr1 is connected to the first driving port of the driving module 300, the second end of the first resonance inductor Lr1 is respectively connected to the second driving port of the driving module 300 and the first end of the first resistor R1, the second end of the first resistor R1 is respectively connected to the gate of the power device and the first end of the second resistor R2, the first end of the second resonance inductor Lr2 is connected to the third driving port of the driving module 300, and the second end of the second resonance inductor Lr2 is respectively connected to the fourth driving port of the driving module 300 and the first end of the second resistor R2.

[0046] The plurality of lumped branches include a first resonant branch, a second resonant branch and an impedance branch. Specifically, the first resonant inductor Lr1, the first resistor R1 and the second resistor R2 constitute the first resonant branch, the first resistor R1 and the second resistor R2 constitute the low impedance branch, and the second resonant inductor Lr2, the first resistor R1 and the second resistor R2 constitute the second resonant branch.

[0047] Further, the driving module 300 is used to select and turn on the first resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the first resonant inductor when the first control signal is at the first level and the second control signal is at the second level. The first level and the second level are different. The first level can be a high level and the second level can be a low level; optionally, the first level can be a low level and the second level can be a high level. In the embodiment of the present application, for ease of description, the first level is a high level and the second level is a low level.

[0048] When the first control signal is at the first level and the second control signal is at the second level, the power device is in the first turn-on stage. At this time, the driving module 300 selects to turn on the first resonant branch composed of the first resonant inductor Lr1, the first resistor R1 and the second resistor R2. The first resonant branch resonates with the parasitic capacitance (mainly Miller capacitance) of the power device, thereby suppressing the positive crosstalk and negative crosstalk generated in the first turn-on stage of the power device, and preventing other power devices in the bridge circuit from being mis-turned on.

[0049] Optionally, the driving module 300 is used to select and turn on the second resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the second resonant inductor when the first control signal is at the second level and the second control signal is at the first level.

[0050] When the first control signal is at the second level and the second control signal is at the first level, the power device is in the first turn-off stage. At this time, the driving module 300 selects to turn on the second resonant branch composed of the second resonant inductor Lr2, the first resistor R1, and the second resistor R2. The second resonant branch resonates with the parasitic capacitance (mainly Miller capacitance) of the power device, thereby suppressing the positive crosstalk and negative crosstalk generated in the first turn-off stage of the power device, and preventing other power devices in the bridge circuit from being misled.

[0051] Optionally, the driving module 300 is used to select and turn on the second impedance branch to drive the power device and clamp the gate voltage of the power device when the first control signal is at the second level and the second control signal is at the second level.

[0052] When the first control signal is at the second level and the second control signal is at the second level, the power device may be in the second on stage or the second off stage. If the power device is in the second on stage, the driving module 300 may select to turn on the second impedance branch composed of the first resistor R1 and the second resistor R2, so that the gate voltage of the power device can be stabilized at VCC. If the power device is in the second off stage, the driving module 300 may select to turn on the second impedance branch composed of the first resistor R1 and the second resistor R2, so that the gate voltage of the power device can be stabilized at VEE.

[0053] In one embodiment, the driving module 300 includes at least a first control port, a second control port and multiple driving ports. The first control port and the second control port are respectively connected to the signal processing module 200. The first control port is used to transmit a first control signal, and the second control port is used to transmit a second control signal. The driving port is connected to a lumped branch, and different driving ports are connected to different lumped branches.

[0054] The driving module 300 is used to select and conduct a target driving port according to the first control signal and the second control signal, so as to conduct a target lumped branch connected to the target driving port.

[0055] For example, Figure 3 As shown, the driving module 300 may include a GD3162 driving chip. The first control port may be the GS_ENH pin of the GD3162 driving chip, and the second control port may be the GS_ENL pin of the GD3162 driving chip. Accordingly, the driving ports may be the GH_1 pin, GH_2 pin, GL_1 pin, and GL_2 pin of the GD3162 chip, respectively. When the first control signal received by the GS_ENH pin is at a high level, the GH_1 pin is turned on; when the first control signal received by the GS_ENH pin is at a low level, the GH_2 pin is turned on. When the second control signal received by the GS_ENL pin is at a high level, the GL_1 pin is turned on; when the second control signal received by the GS_ENL pin is at a low level, the GL_2 pin is turned on. The driving module may select the corresponding pin to be turned on based on the level state of the first control signal and the level state of the second control signal, thereby turning on the lumped branch connected to the pin.

[0056] In one embodiment, the signal processing module 200 is used to output a first control signal of a first level and a second control signal of a second level when the pulse width modulation signal is a first level signal, and after the first control signal maintains the first level for a first preset time, flip the first control signal to the second level.

[0057] It can be understood that, in the turn-on stage of the power device, the signal processing module 200 first outputs a first control signal of a first level and a second control signal of a second level, so that the power device is in the first turn-on stage. After the first control signal maintains the first level for a first preset time, the gate voltage of the power device reaches VCC. At this time, the signal processing module 200 can flip the first control signal from the first level to the second level, and the second control signal is still the second level, so that the power device is in the second turn-on stage.

[0058] The signal processing module 200 is also used to output a first control signal of the second level and a second control signal of the first level when the PWM signal is a second level signal, and flip the second control signal to the second level after the second control signal maintains the first level for a second preset time.

[0059] It can be understood that in the shutdown stage of the power device, the signal processing module 200 first outputs the first control signal of the second level and the second control signal of the first level, so that the power device enters the first shutdown stage. After the second control signal maintains the first level for a second preset time, the gate voltage of the power device reaches zero or VEE. At this time, the signal processing module 200 can flip the second control signal from the first level to the second level, and the first control signal still maintains the second level, so that the power device enters the second shutdown stage.

[0060] In one embodiment, Figure 4 As shown, the signal processing module 200 includes a first delay level flip unit 210 and a second delay level flip unit 220 .

[0061] The first delay level flip unit 210 includes a first power switch tube Q1, a third resistor R3, a fourth resistor R4, a first comparator U1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a first capacitor C1, wherein the gate of the first power switch tube Q1 is connected to the control module 100, the drain of the first power switch tube Q1 is connected to the working power supply (i.e., VCC), and the source of the first power switch tube Q1 is connected to the first end of the third resistor R3; the first end of the fourth resistor R4 is respectively connected to the second end of the third resistor R3, the non-inverting input end of the first comparator U1, and the first end of the fifth resistor R5, and the second end of the fourth resistor R4 is grounded; the inverting input end of the first comparator U1 is respectively connected to the first end of the first capacitor C1 and the first end of the sixth resistor R6, and the output end of the first comparator U1 is respectively connected to the second end of the fifth resistor R5, the second end of the sixth resistor R6, and the first end of the seventh resistor R7; the second end of the first capacitor C1 is grounded, and the second end of the seventh resistor R7 is connected to the first control end of the driving module 300.

[0062] The first delay level flip unit 220 is used to output a high-level first control signal when the pulse width modulation signal is at a high level, and flip the first control signal to a low level after the first control signal maintains a high level for a first preset time; wherein the first preset time is the charging time of the first capacitor. It can be understood that when the pulse width modulation signal received by the first power switch tube Q1 is at a high level, the first power switch tube Q1 is turned on, and the VCC power supply voltage flows to the in-phase input and output of the first comparator U1 through the third resistor R3 and the fourth resistor R4, that is, the voltage of the in-phase input terminal of the first comparator U1 is VCC, the voltage of the inverting input terminal is zero, and the first comparator U1 outputs a high-level first control signal. In this process, the first capacitor C1 is charged, and when the first capacitor C1 is fully charged, the first capacitor C1 will discharge, causing the voltage of the inverting input terminal of the first comparator U1 to reach VCC, and the first comparator U1 outputs a low-level first control signal.

[0063] The first delay level flip unit 210 is also used to output a low-level first control signal when the pulse width modulation signal is at a low level. When the pulse width modulation signal received by the first power switch tube Q1 is at a low level, the first power switch tube Q1 is not turned on, the voltages of the in-phase input terminal and the inverting input terminal of the first comparator U1 are both zero, and the first comparator U1 outputs a low-level first control signal.

[0064] The second delay level flip unit 220 includes a second power switch tube Q2, a third power switch tube Q3, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a second comparator U2 and a second capacitor C2, wherein the gate of the second power switch tube Q2 is connected to the control module 100, the drain of the second power switch tube Q2 is respectively connected to the first end of the eighth resistor R8 and the gate of the third power switch tube Q3, the source of the second power switch tube Q2 is grounded, and the second end of the eighth resistor R8 is connected to the working power supply VCC; the drain of the third power switch tube Q3 is connected to VCC, and the third power switch tube Q 3 is connected to the first end of the ninth resistor R9; the first end of the tenth resistor R10 is respectively connected to the second end of the ninth resistor R9, the non-inverting input end of the second comparator U2, and the first end of the eleventh resistor R11, and the second end of the tenth resistor R10 is grounded; the inverting input end of the second comparator U2 is respectively connected to the first end of the second capacitor C2 and the first end of the twelfth resistor R12, and the output end of the second comparator U2 is respectively connected to the second end of the eleventh resistor R11, the second end of the twelfth resistor R12, and the first end of the thirteenth resistor R13; the second end of the second capacitor C2 is grounded, and the second end of the thirteenth resistor R13 is connected to the second control end of the driving module 300.

[0065] The second delay level flip unit 220 is used to output a low-level second control signal when the pulse width modulation signal is at a high level. When the pulse width modulation signal is at a high level, the second power switch tube Q2 is turned on, resulting in the gate voltage of the third power switch tube Q3 being zero, and the third power switch tube Q3 is not turned on. At this time, the voltages of the in-phase input terminal and the inverting input terminal of the second comparator U2 are both zero, and the second comparator U2 outputs a low-level second control signal.

[0066] The second delay level flip unit 220 is also used to output a high-level second control signal first when the pulse width modulation signal is at a low level, and flip the second control signal to a low level after the second control signal maintains a high level for a second preset time; the second preset time is the charging time of the second capacitor C2. When the pulse width modulation signal is at a low level, the second power switch tube Q2 is not turned on, the VCC power supply voltage flows into the gate of the third power switch tube Q3 through the eighth resistor R8, the third power switch tube Q3 is turned on, the voltage of the in-phase input terminal of the second comparator U2 is VCC, the voltage of the inverting input terminal is 0, and the second comparator U2 outputs a high-level second control signal. In the whole process, the second capacitor C2 is charged, and the second capacitor C2 starts to discharge after being fully charged, so that the voltage of the inverting input terminal of the second comparator U2 is VCC, and the second comparator U2 outputs a low-level second control signal.

[0067] In one embodiment, the power device driving circuit further includes a power supply which is connected to the control module 100 , the signal processing module 200 , and the driving module 300 , respectively, and is used to provide corresponding operating voltages to the control module 100 , the signal processing module 200 , and the driving module 300 , respectively.

[0068] In one embodiment, the present application also provides a vehicle, including a power device and a driving circuit of the power device provided by any of the above embodiments.

[0069] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A driving circuit for a power device, characterized in that: include: A control module, used for outputting a pulse width modulation signal; A signal processing module, connected to the control module, configured to output a first control signal and a second control signal according to the pulse width modulation signal; The resonant module comprises a plurality of lumped branches, wherein the first end of each lumped branch is respectively connected to the gate of the power device; A driving module is respectively connected to the signal processing module and the second end of each of the lumped branches, and is used to select and turn on a target lumped branch and output a driving signal according to the first control signal and the second control signal, so as to drive the power device and suppress the gate voltage crosstalk of the power device; wherein the target lumped branch is one of the multiple lumped branches, and different lumped branches output different driving signals.

2. The driving circuit of a power device according to claim 1, characterized in that: The resonance module includes: a first resonant inductor, a first resistor, a second resonant inductor and a second resistor, wherein the first end of the first resonant inductor is connected to the first driving port of the driving module, the second end of the first resonant inductor is respectively connected to the second driving port of the driving module and the first end of the first resistor, the second end of the first resistor is respectively connected to the gate of the power device and the first end of the second resistor, the first end of the second resonant inductor is connected to the third driving port of the driving module, and the second end of the second resonant inductor is respectively connected to the fourth driving port of the driving module and the first end of the second resistor; The multiple lumped branches include a first resonant branch, a second resonant branch and an impedance branch, wherein the first resonant inductor, the first resistor and the second resistor constitute the first resonant branch, the first resistor and the second resistor constitute the impedance branch, and the second resonant inductor, the first resistor and the second resistor constitute the second resonant branch.

3. The driving circuit of the power device according to claim 2, characterized in that: The driving module is used for selecting and conducting the first resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the first resonant inductor when the first control signal is at a first level and the second control signal is at a second level; wherein the first level and the second level are different; and when the first control signal is at the second level and the second control signal is at the first level, selectively turning on the second resonant branch to drive the power device and resonate with the parasitic capacitance of the power device through the second resonant inductor; And, when the first control signal is at the second level and the second control signal is at the second level, the impedance branch is selectively turned on to drive the power device and clamp the gate voltage of the power device.

4. The driving circuit of a power device according to claim 1, characterized in that: The driving module at least includes a first control port, a second control port and a plurality of driving ports, the first control port and the second control port are respectively connected to the signal processing module, the first control port is used to transmit the first control signal, the second control port is used to transmit the second control signal, the driving port is connected to the lumped branch, and different driving ports are connected to different lumped branches; The driving module is used for selecting and conducting a target driving port according to the first control signal and the second control signal, so as to conduct the target lumped branch connected to the target driving port.

5. The driving circuit of a power device according to claim 1, characterized in that: The signal processing module is used for outputting a first control signal of a first level and a second control signal of a second level when the pulse width modulation signal is a first level signal, and flipping the first control signal to the second level after the first control signal maintains the first level for a first preset time; The signal processing module is also used to output the first control signal of the second level and the second control signal of the first level when the pulse width modulation signal is a second level signal, and flip the second control signal to the second level after the second control signal maintains the first level for a second preset time.

6. The driving circuit of a power device according to claim 1, characterized in that: The signal processing module comprises: The first delay level flip unit comprises a first power switch tube, a third resistor, a fourth resistor, a first comparator, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor, wherein the gate of the first power switch tube is connected to the control module, the drain of the first power tube is connected to the working power supply, and the source of the first power switch tube is connected to the first end of the third resistor; the first end of the fourth resistor is respectively connected to the second end of the third resistor, the in-phase input end of the first comparator, and the first end of the fifth resistor, and the second end of the fourth resistor is grounded; the inverting input end of the first comparator is respectively connected to the first end of the first capacitor and the first end of the sixth resistor, and the output end of the first comparator is respectively connected to the second end of the fifth resistor, the second end of the sixth resistor, and the first end of the seventh resistor; the second end of the first capacitor is grounded, and the second end of the seventh resistor is connected to the first control end of the driving module; The second delay level flip unit comprises a second power switch tube, a third power switch tube, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second comparator and a second capacitor, wherein the gate of the second power switch tube is connected to the control module, the drain of the second power switch tube is respectively connected to the first end of the eighth resistor and the gate of the third power switch tube, the source of the second power switch tube is grounded, and the second end of the eighth resistor is connected to the working power supply; the drain of the third power switch tube is connected to VCC, and the source of the third power switch tube is connected to the first end of the ninth resistor; the first end of the tenth resistor is respectively connected to the second end of the ninth resistor, the in-phase input end of the second comparator, and the first end of the eleventh resistor, and the second end of the tenth resistor is grounded; the inverting input end of the second comparator is respectively connected to the first end of the second capacitor and the first end of the twelfth resistor, and the output end of the second comparator is respectively connected to the second end of the eleventh resistor, the second end of the twelfth resistor, and the first end of the thirteenth resistor; the second end of the second capacitor is grounded, and the second end of the thirteenth resistor is connected to the second control end of the driving module.

7. The driving circuit of a power device according to claim 6, characterized in that: The first delay level flip unit is used to output a high-level first control signal when the pulse width modulation signal is at a high level, and flip the first control signal to a low level after the first control signal maintains a high level for a first preset time; wherein the first preset time is the charging time of the first capacitor; The first delay level flip unit is further configured to output a first control signal at a low level when the pulse width modulation signal is at a low level.

8. The driving circuit of a power device according to claim 6, characterized in that: The second delay level flip unit is used for outputting a second control signal of low level when the pulse width modulation signal is at high level; The second delay level flipping unit is also used to output a high-level second control signal first when the pulse width modulation signal is at a low level, and flip the second control signal to a low level after the second control signal maintains a high level for a second preset time; the second preset time is the charging time of the second capacitor.

9. The driving circuit of a power device according to claim 1, characterized in that: The power device driving circuit also includes: The power supply is connected to the control module, the signal processing module and the driving module respectively, and is used to provide corresponding working voltages to the control module, the signal processing module and the driving module respectively.

10. A vehicle, characterized in that: The invention comprises a power device and a driving circuit of the power device according to any one of claims 1 to 9.

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