Driver IC circuit of intelligent power module, intelligent power module and air conditioner

Abstract

The present invention discloses a driving IC circuit for an intelligent power module, an intelligent power module and an air conditioner. The driving IC circuit of the intelligent power module includes a working voltage input terminal, an inverter logic buffer circuit, an upper bridge driving circuit, a lower bridge driving circuit, a PFC logic buffer circuit, a PFC driving circuit, a first voltage regulation control input terminal, a second voltage regulation control input terminal, a first voltage regulation module and a second voltage regulation module; the first voltage regulation module performs step-up or step-down processing on the voltage input from the working voltage input terminal according to the signal of the first voltage regulation control input terminal; the second voltage regulation module performs step-up or step-down processing on the voltage input from the working voltage input terminal according to the signal of the second voltage regulation control input terminal, or outputs the voltage of the working voltage input terminal to the PFC logic buffer circuit and the PFC driving circuit. The present invention solves the problem that the driving IC of the existing intelligent power module cannot directly drive the SiC-based power switch device.

Description

Technical Field

[0001] The present invention relates to the field of intelligent power modules, and in particular, to a driving IC circuit for an intelligent power module, an intelligent power module, and an air conditioner. Background Art

[0002] An intelligent power module, i.e., IPM (Intelligent Power Module), is a power drive product that combines power electronics and integrated circuit technologies. The intelligent power module integrates power switching devices and high-voltage drive circuits, and internally incorporates fault detection circuits such as overvoltage, overcurrent, and overheating. On the one hand, the intelligent power module receives control signals from the MCU to drive subsequent circuits to work, and on the other hand, it sends the system status detection signals back to the MCU. Compared with traditional discrete solutions, the intelligent power module has won an increasingly large market with its advantages such as high integration and high reliability. It is particularly suitable for inverters for driving motors and various inverter power supplies, and is an ideal power electronic device for variable frequency speed regulation, metallurgical machinery, electric traction, servo drive, and variable frequency household appliances.

[0003] The power switching devices inside the existing intelligent power modules are Si-based power switching devices. People's research on Si-based power switching devices has been very mature, and the performance of Si-based power switching devices is about to approach the limit of material properties. Therefore, it is very difficult for the prior art to significantly improve the overall performance of intelligent power modules through means such as structural innovation and manufacturing process improvement of Si-based power switching devices. The third-generation semiconductors (i.e., wide bandgap semiconductor power devices) represented by SiC-based power switching devices have advantages such as high breakdown voltage, high power density, high output power, high operating frequency, and suitability for working at high temperatures. For example, SiC-based MOSFETs have a very high blocking voltage and no tail current similar to Si-based IGBTs, resulting in very low dynamic losses for SiC-based MOSFETs; and the diodes made of SiC material also have very low switching losses; at the same time, SiC material has three times the thermal conductivity of Si material, making the IPM module based on SiC material have better operating temperature and good reliability. In the high-voltage power market, SiC-based power switching devices (such as SiC-based MOSFETs) are considered perfect substitutes for Si-based IGBTs.

[0004] However, under normal circumstances, Si-based power switch devices (such as Si-based MOSFETs and Si-based IGBTs, etc.) are suitable for operating under a driving voltage of 12 - 15V. Therefore, the driving voltage VDD of the intelligent power module in variable-frequency household appliances (such as variable-frequency air conditioners) is usually set to 15V, that is, the gate driving signal (high level) of the Si-based power switch device in the intelligent power module is 15V. However, SiC-based power switch devices (such as SiC-based MOSFETs) are more suitable for operating under a driving voltage of 18 - 20V, which results in the driving IC of the Si-based power switch device in the existing intelligent power module (also known as the driving IC of the intelligent power module) not being suitable for directly driving SiC-based power switch devices. Moreover, in most cases, an intelligent power module may simultaneously have SiC-based power switch devices and Si-based power switch devices. For example, the PFC switch tube in the intelligent power module generally uses a SiC-based power switch device to replace the original Si-based power switch device to improve the power correction factor and thus improve the power utilization rate, while the inverter devices (i.e., the upper-bridge switch tube and the lower-bridge switch tube) in the intelligent power module still use Si-based power switch devices. If the same driving voltage of the Si-based power switch device is used for both, the performance of the SiC-based power switch device may not be effectively exerted. Summary of the Invention

[0005] The main object of the present invention is to provide a driving IC circuit for an intelligent power module, aiming to solve the problem that the driving IC of the existing intelligent power module cannot directly drive SiC-based power switch devices.

[0006] To achieve the above object, the present invention provides a driving IC circuit for an intelligent power module. The driving IC circuit includes a working voltage input terminal, an inverter logic buffer circuit, an upper-bridge driving circuit, a lower-bridge driving circuit, a PFC logic buffer circuit, a PFC driving circuit, a first voltage regulation control input terminal, a second voltage regulation control input terminal, a first voltage regulation module, and a second voltage regulation module; wherein:

[0007] The first voltage regulation control input terminal is used for inputting a first voltage regulation control signal;

[0008] The first voltage regulation module is used for boosting or bucking the voltage input from the working voltage input terminal according to the first voltage regulation control signal to provide a driving input voltage for the inverter logic buffer circuit, the upper-bridge driving circuit, and the lower-bridge driving circuit; or directly outputting the voltage input from the working voltage input terminal to the driving voltage input terminals of the inverter logic buffer circuit, the upper-bridge driving circuit, and the lower-bridge driving circuit;

[0009] The second voltage regulation control input terminal is used for inputting a second voltage regulation control signal;

[0010] The second voltage regulating module is configured to boost or buck the voltage input from the working voltage input terminal according to the second voltage regulating control signal, so as to provide a driving input voltage for the PFC logic buffer circuit and the PFC driving circuit; or directly output the voltage input from the working voltage input terminal to the driving voltage input terminals of the PFC logic buffer circuit and the PFC driving circuit.

[0011] Preferably, the input terminal of the first voltage regulating module is connected to the working voltage input terminal, the control terminal of the first voltage regulating module is connected to the first voltage regulating control input terminal, and the output terminal of the first voltage regulating module is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit and the lower bridge driving circuit; the input terminal of the second voltage regulating module is connected to the working voltage input terminal, the control terminal of the second voltage regulating module is connected to the second voltage regulating control input terminal, and the output terminal of the second voltage regulating module is respectively connected to the driving voltage input terminals of the PFC logic buffer circuit and the PFC driving circuit; the output terminal of the inverter logic buffer circuit is respectively connected to the input terminal of the upper bridge driving circuit and the input terminal of the lower bridge driving circuit, and the output terminal of the PFC logic buffer circuit is connected to the input terminal of the PFC driving circuit.

[0012] Preferably, the first voltage regulating module includes a first boost module, a first buck module and a first analog switch. The input terminals of the first boost module and the first buck module are connected to the working voltage input terminal. The output terminal of the first boost module is connected to the first input terminal of the first analog switch. The output terminal of the first buck module is connected to the second input terminal of the first analog switch. The third input terminal of the first analog switch is directly connected to the working voltage input terminal. The common terminal of the first analog switch is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit and the lower bridge driving circuit. The control terminal of the first analog switch is connected to the first voltage regulating control input terminal.

[0013] Preferably, the second voltage regulating module includes a second boost module, a second buck module and a second analog switch. The input terminals of the second boost module and the second buck module are connected to the working voltage input terminal. The output terminal of the second boost module is connected to the first input terminal of the second analog switch. The output terminal of the second buck module is connected to the second input terminal of the second analog switch. The third input terminal of the second analog switch is directly connected to the working voltage input terminal. The common terminal of the second analog switch is respectively connected to the driving voltage input terminals of the PFC logic buffer circuit and the PFC driving circuit. The control terminal of the second analog switch is connected to the second voltage regulating control input terminal.

[0014] In addition, to achieve the above object, the present invention further provides a driving IC circuit for an intelligent power module. The driving IC circuit includes a working voltage input terminal, an inverter logic buffer circuit, an upper bridge driving circuit, a lower bridge driving circuit, a PFC logic buffer circuit, a PFC driving circuit, a voltage regulation control input terminal, and a voltage regulation module; wherein:

[0015] The voltage regulation control input terminal is used for inputting a voltage regulation control signal;

[0016] The voltage regulation module is used for regulating the voltage input from the working voltage input terminal according to the voltage regulation control signal input from the voltage regulation control input terminal, and providing a driving input voltage for the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit; or directly outputting the voltage input from the working voltage input terminal to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit.

[0017] Preferably, the input terminal of the voltage regulation module is connected to the working voltage input terminal, the control terminal of the voltage regulation module is connected to the voltage regulation control input terminal, and the output terminal of the voltage regulation module is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit; the output terminal of the inverter logic buffer circuit is respectively connected to the input terminal of the upper bridge driving circuit and the input terminal of the lower bridge driving circuit, and the output terminal of the PFC logic buffer circuit is further connected to the input terminal of the PFC driving circuit.

[0018] Preferably, the voltage regulation module includes a buck module and an analog switch. The input terminal of the buck module is connected to the working voltage input terminal, the output terminal of the buck module is connected to the first input terminal of the analog switch, the second input terminal of the analog switch is directly connected to the working voltage input terminal, the common terminal of the analog switch is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit, and the control terminal of the analog switch is connected to the voltage regulation control input terminal.

[0019] Preferably, the voltage regulating module includes a boost module and an analog switch. The input end of the boost module is connected to the working voltage input end. The output end of the boost module is connected to the first input end of the analog switch. The second input end of the analog switch is directly connected to the working voltage input end. The common end of the analog switch is respectively connected to the driving voltage input ends of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit and the PFC driving circuit. The control end of the analog switch is connected to the voltage regulating control input end.

[0020] In addition, to achieve the above object, the present invention further provides an intelligent power module, which includes a low-voltage area power supply input end, a first voltage regulating end, a second voltage regulating end, an upper bridge arm control input end, a lower bridge arm control input end, a PFC control input end, a plurality of resistors, a first upper bridge arm switching tube, a second upper bridge arm switching tube, a third upper bridge arm switching tube, a first lower bridge arm switching tube, a second lower bridge arm switching tube, a third lower bridge arm switching tube, a PFC switching tube, and a driving IC circuit of the intelligent power module as described above; wherein:

[0021] The low-voltage area power supply input end is connected to the working voltage input end of the driving IC circuit. The first voltage regulating end is connected to the first voltage regulating control input end of the driving IC circuit. The second voltage regulating end is connected to the second voltage regulating control input end of the driving IC circuit. The upper bridge arm control input end is connected to the upper bridge control input end of the driving IC circuit. The lower bridge arm control input end is connected to the lower bridge control input end of the driving IC circuit. The PFC control input end is connected to the PFC control input end of the driving IC circuit. The first output end of the upper bridge driving circuit in the driving IC circuit is connected to the control end of the first upper bridge arm switching tube through one of the resistors. The second output end of the upper bridge driving circuit is connected to the control end of the second upper bridge arm switching tube through one of the resistors. The third output end of the upper bridge driving circuit is connected to the control end of the third upper bridge arm switching tube through one of the resistors. The first output end of the lower bridge driving circuit in the driving IC circuit is connected to the control end of the first lower bridge arm switching tube through one of the resistors. The second output end of the lower bridge driving circuit is connected to the control end of the second lower bridge arm switching tube through one of the resistors. The third output end of the lower bridge driving circuit is connected to the control end of the third lower bridge arm switching tube through one of the resistors. The output end of the PFC driving circuit in the driving IC circuit is connected to the control end of the PFC switching tube through one of the resistors.

[0022] The first upper bridge arm switching tube, the second upper bridge arm switching tube, the third upper bridge arm switching tube, the first lower bridge arm switching tube, the second lower bridge arm switching tube, the third lower bridge arm switching tube and the PFC switching tube are Si-based IGBT tubes or SiC-based MOSFET tubes.

[0023] In addition, to achieve the above object, the present invention further provides an intelligent power module, which includes a low-voltage area power supply input terminal, a voltage regulating terminal, an upper bridge arm control input terminal, a lower bridge arm control input terminal, a PFC control input terminal, a plurality of resistors, a first upper bridge arm switching tube, a second upper bridge arm switching tube, a third upper bridge arm switching tube, a first lower bridge arm switching tube, a second lower bridge arm switching tube, a third lower bridge arm switching tube, a PFC switching tube, and a driving IC circuit of the intelligent power module as described above; wherein:

[0024] The low-voltage area power supply input terminal is connected to the operating voltage input terminal of the driving IC circuit, the voltage regulating terminal is connected to the voltage regulating control input terminal of the driving IC circuit, the upper bridge arm control input terminal is connected to the upper bridge control input terminal of the driving IC circuit, the lower bridge arm control input terminal is connected to the lower bridge control input terminal of the driving IC circuit, and the PFC control input terminal is connected to the PFC input terminal of the driving IC circuit; the first output terminal of the upper bridge driving circuit in the driving IC circuit is connected to the control terminal of the first upper bridge arm switching tube through one of the resistors, the second output terminal of the upper bridge driving circuit is connected to the control terminal of the second upper bridge arm switching tube through one of the resistors, and the third output terminal of the upper bridge driving circuit is connected to the control terminal of the third upper bridge arm switching tube through one of the resistors; the first output terminal of the lower bridge driving circuit in the driving IC circuit is connected to the control terminal of the first lower bridge arm switching tube through one of the resistors, the second output terminal of the lower bridge driving circuit is connected to the control terminal of the second lower bridge arm switching tube through one of the resistors, and the third output terminal of the lower bridge driving circuit is connected to the control terminal of the third lower bridge arm switching tube through one of the resistors; the output terminal of the PFC driving circuit in the driving IC circuit is connected to the control terminal of the PFC switching tube through one of the resistors;

[0025] The first upper bridge arm switching tube, the second upper bridge arm switching tube, the third upper bridge arm switching tube, the first lower bridge arm switching tube, the second lower bridge arm switching tube, the third lower bridge arm switching tube, and the PFC switching tube are Si-based IGBT tubes, or the first upper bridge arm switching tube, the second upper bridge arm switching tube, the third upper bridge arm switching tube, the first lower bridge arm switching tube, the second lower bridge arm switching tube, the third lower bridge arm switching tube, and the PFC switching tube are SiC-based MOSFET tubes.

[0026] In addition, to achieve the above object, the present invention further provides an air conditioner, which includes the intelligent power module as described above.

[0027] Compared with the driving IC circuit of the intelligent power module in the prior art, the driving IC circuit of the intelligent power module of the present invention is provided with the first voltage regulation control input terminal, the second voltage regulation control input terminal, the first voltage regulation module and the second voltage regulation module. Therefore, the driving IC circuit of the intelligent power module of the present invention can, according to the types of the upper-bridge-arm switching transistor, the lower-bridge-arm switching transistor and the PFC switching transistor in the intelligent power module (being SiC-based power switching devices or Si-based power switching devices) and the magnitude of the voltage input by the working voltage input terminal, input corresponding voltage regulation control signals at the first voltage regulation control input terminal and the second voltage regulation control input terminal, so as to achieve the purpose of simultaneously providing suitable driving voltages for the SiC-based power switching devices and the Si-based power switching devices in the intelligent power module, thereby solving the problem that the driving IC of the existing intelligent power module cannot directly drive the SiC-based power switching devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0029] Figure 1 Schematic structural diagram of the first embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0030] Figure 2 Schematic structural diagram of the first voltage regulation module in the first embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0031] Figure 3 Schematic structural diagram of the second voltage regulation module in the first embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0032] Figure 4 Schematic circuit diagram of the second embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0033] Figure 5 Schematic structural diagram of one embodiment of the voltage regulation module in the second embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0034] Figure 6 Schematic structural diagram of another embodiment of the voltage regulation module in the second embodiment of the driving IC circuit of the intelligent power module of the present invention;

[0035] Figure 7 Schematic structural diagram of the first embodiment of the intelligent power module of the present invention;

[0036] Figure 8 This is a schematic structural diagram of the second embodiment of the intelligent power module of the present invention.

[0037] The realization of the object of the present invention, functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The present invention provides a driving IC circuit 100 for an intelligent power module to solve the problem that the driving IC of the existing intelligent power module cannot directly drive the SiC-based power switch device.

[0040] Figure 1 This is a schematic structural diagram of the first embodiment of the driving IC circuit of the intelligent power module of the present invention. Referring to Figure 1 , in this embodiment, the driving IC circuit 100 of the intelligent power module includes a working voltage input terminal VDD0, an inverter logic buffer circuit 101, an upper bridge driving circuit 102, a lower bridge driving circuit 103, a PFC logic buffer circuit 104, a PFC driving circuit 105, a first voltage regulation control input terminal RS1, a second voltage regulation control input terminal RS2, a first voltage regulation module 106, and a second voltage regulation module 107.

[0041] Among them, the first voltage regulation control input terminal RS1 is used to input a first voltage regulation control signal;

[0042] The first voltage regulation module 106 is used to boost or buck the voltage input from the working voltage input terminal VDD0 according to the first voltage regulation control signal input from the first voltage regulation control input terminal RS1, and provide a driving input voltage for the inverter logic buffer circuit 101, the upper bridge driving circuit 102, and the lower bridge driving circuit 103; or directly output the voltage input from the working voltage input terminal VDD0 to the driving voltage input terminals of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, and the lower bridge driving circuit 103. At this time, the driving voltage of the driving voltage input terminals of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, and the lower bridge driving circuit 103 is equal to the voltage input from the working voltage input terminal VDD0;

[0043] The second voltage regulation control input terminal RS2 is used to input a second voltage regulation control signal;

[0044] The second voltage regulating module 107 is configured to boost or buck the voltage input from the working voltage input terminal VDD0 according to the second voltage regulating control signal input from the second voltage regulating control input terminal RS2, and provide a driving input voltage for the PFC logic buffer circuit 104 and the PFC driving circuit 105; or directly output the voltage input from the working voltage input terminal VDD0 to the driving voltage input terminals of the PFC logic buffer circuit 104 and the PFC driving circuit 105. At this time, the driving voltage of the driving voltage input terminals of the PFC logic buffer circuit 104 and the PFC driving circuit 105 is equal to the voltage input from the working voltage input terminal VDD0.

[0045] In this embodiment, the input end of the first voltage regulating module 106 is connected to the working voltage input end VDD0, the control end of the first voltage regulating module 106 is connected to the first voltage regulating control input end RS1, and the output end of the first voltage regulating module 106 is respectively connected to the driving voltage input ends of the inverter logic buffer circuit 101, the upper bridge driving circuit 102 and the lower bridge driving circuit 103; the input end of the second voltage regulating module 107 is connected to the working voltage input end VDD0, the control end of the second voltage regulating module 107 is connected to the second voltage regulating control input end RS2, and the output end of the second voltage regulating module 107 is respectively connected to the driving voltage input ends of the PFC logic buffer circuit 104 and the PFC driving circuit 105; in this embodiment, the output end of the inverter logic buffer circuit 101 is respectively connected to the input end of the upper bridge driving circuit 102 and the input end of the lower bridge driving circuit 103, and the output end of the PFC logic buffer circuit 104 is connected to the input end of the PFC driving circuit 105. IN1, IN2 and IN3 in the figure are the upper bridge control input ends of the driving IC circuit 100 of the intelligent power module in this embodiment, IN4, IN5 and IN6 in the figure are the lower bridge control input ends of the driving IC circuit 100 of the intelligent power module in this embodiment, and IN7 in the figure is the PFC input end of the driving IC circuit 100 of the intelligent power module in this embodiment. Among them, IN1, IN2, IN3, IN4, IN5 and IN6 are connected to the inverter logic buffer circuit 101, and IN7 is connected to the PFC logic buffer circuit. HO1 in the figure is the first output end of the upper bridge driving circuit 102, HO2 is the second output end of the upper bridge driving circuit 102, HO3 is the third output end of the upper bridge driving circuit 102, LO1 in the figure is the first output end of the lower bridge driving circuit 103, LO2 is the second output end of the lower bridge driving circuit 103, LO3 is the third output end of the lower bridge driving circuit 103, and PFCO in the figure is the output end of the PFC driving circuit 105. Among them, the first output end HO1 of the upper bridge driving circuit 102, the second output end HO2 of the upper bridge driving circuit 102 and the third output end HO3 of the upper bridge driving circuit 102 are respectively connected to the control ends of the corresponding upper bridge arm switching tubes (not shown in the figure) in the intelligent power module, the first output end LO1 of the lower bridge driving circuit 103, the second output end LO2 of the lower bridge driving circuit 103 and the third output end LO3 of the lower bridge driving circuit 103 are respectively connected to the control ends of the corresponding upper bridge arm switching tubes (not shown in the figure) in the intelligent power module, and the output end PFCO of the PFC driving circuit 105 is connected to the control end of the PFC switching tube (not shown in the figure) in the intelligent power module.

[0046] Figure 2Schematic diagram of the structure of the first voltage regulation module in the first embodiment of the driving IC circuit of the intelligent power module of the present invention. Referring together to Figure 1 and Figure 2 , in this embodiment, the first voltage regulation module 106 includes a first boost module 1061, a first buck module 1062, and a first analog switch 1063. Among them, the input ends of the first boost module 1061 and the first buck module 1062 are connected to the working voltage input end VDD0. The output end of the first boost module 1061 is connected to the first input end of the first analog switch 1063 (corresponding to the end numbered 1 in the first analog switch 1063). The output end of the first buck module 1062 is connected to the second input end of the first analog switch 1063 (corresponding to the end numbered 2 in the first analog switch 1063). The third input end of the first analog switch 1063 (corresponding to the end numbered 0 in the first analog switch 1063) is directly connected to the working voltage input end VDD0. The common end of the first analog switch 1063 is respectively connected to the driving voltage input ends of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, and the lower bridge driving circuit 103. The voltage of the common end of the first analog switch 1063 is VDD1. In this embodiment, the control end of the first analog switch 1063 is connected to the first voltage regulation control input end RS1.

[0047] Figure 3 Schematic diagram of the structure of the second voltage regulation module in the first embodiment of the driving IC circuit of the intelligent power module of the present invention. Referring together to Figure 1 and Figure 3, in this embodiment, the second voltage regulating module 107 includes a second boost module 1071, a second buck module 1072, and a second analog switch 1073. The input ends of the second boost module 1071 and the second buck module 1072 are connected to the working voltage input end VDD0. The output end of the second boost module 1071 is connected to the first input end of the second analog switch 1073 (corresponding to the end labeled 1 in the second analog switch 1073). The output end of the second buck module 1072 is connected to the second input end of the second analog switch 1073 (corresponding to the end labeled 2 in the second analog switch 1073). The third input end of the second analog switch 1073 (corresponding to the end labeled 0 in the second analog switch 1073) is directly connected to the working voltage input end VDD0. The common end of the second analog switch 1073 is respectively connected to the driving voltage input ends of the PFC logic buffer circuit 104 and the PFC driving circuit 105. The voltage at the common end of the second analog switch 1073 is VDD1. In this embodiment, the control end of the second analog switch 1073 is connected to the second voltage regulating control input end RS2. In this embodiment, the voltage of the working voltage input end is 15V or 20V.

[0048] Due to the provision of the first voltage regulating module 106 and the second voltage regulating module 107 in the driving IC circuit 100 of the intelligent power module in this embodiment, users can input different voltage regulating control signals at the first voltage regulating control input end RS1 and the second voltage regulating control input end RS2 according to the different types of power switch devices in the intelligent power module (Si-based power switch devices or SiC-based power switch devices), so that the first voltage regulating module 106 and the second voltage regulating module 107 adjust the voltage input from the working voltage input end VDD0 (boost or buck), thereby obtaining driving voltage signals suitable for different types of power switch devices. Specifically, in this embodiment, the first voltage regulating module 106 adjusts the voltage input from the working voltage input end VDD0 to the driving voltage VDD1 and outputs the driving voltage VDD1 to the driving voltage input ends of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, and the lower bridge driving circuit 103. In this embodiment, the second voltage regulating module 107 adjusts the voltage input from the working voltage input end VDD0 to the driving voltage VDD2 and outputs the driving voltage VDD2 to the driving voltage input ends of the PFC logic buffer circuit 104 and the PFC driving circuit 105. In this embodiment, the first voltage regulating module 106 and the second voltage regulating module 107 can achieve the boost function or the buck function.

[0049] Specifically, in this embodiment, when the voltage of the working voltage input terminal VDD0 is 15V, and the upper-bridge switching device and the lower-bridge switching device in the intelligent power module are Si-based power switching devices (such as Si-based IGBT tubes), and the PFC switching device in the intelligent power module is a SiC-based power switching device (such as SiC-based MOSFET tubes), then this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 0, that is, make the first voltage regulation module 106 directly output a 15V driving voltage to the driving voltage input terminals of the inverter logic buffer circuit 101, the upper-bridge driving circuit 102, and the lower-bridge driving circuit 103, so as to provide a 15V driving voltage for the upper-bridge switching device (Si-based power switching device) connected to the output terminal of the upper-bridge driving circuit 102 and the lower-bridge switching device (Si-based power switching device) connected to the output terminal of the lower-bridge driving circuit 103; meanwhile, this embodiment can also control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 connect to the terminal labeled 1, so that the second boost module 1071 in the second voltage regulation module 107 boosts the input 15V voltage, and boosts the 15V voltage to 20V voltage suitable for driving the PFC switching device (SiC-based power switching device) to work;

[0050] In this embodiment, when the voltage of the working voltage input terminal VDD0 is 15V, and the upper-bridge switching device, the lower-bridge switching device, and the PFC switching device in the intelligent power module are Si-based power switching devices, then this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 0. At the same time, control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 also connect to the terminal labeled 0, that is, make both the first voltage regulation module 106 and the second voltage regulation module 107 output a 15V driving voltage to drive the upper-bridge switching device, the lower-bridge switching device, and the PFC switching device to work;

[0051] In this embodiment, when the voltage of the working voltage input terminal VDD0 is 15V and the upper-bridge switch transistor, lower-bridge switch transistor, and PFC switch transistor in the intelligent power module are SiC-based power switch devices, this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 1. At the same time, control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 also connect to the terminal labeled 1, that is, both the first voltage regulation module 106 and the second voltage regulation module 107 boost the 15V voltage input by the working voltage input terminal VDD0 to output a 20V driving voltage suitable for driving SiC-based power switch devices;

[0052] In this embodiment, when the voltage of the working voltage input terminal VDD0 is 20V, and the upper-bridge switch transistor and lower-bridge switch transistor in the intelligent power module are Si-based power switch devices (such as Si-based IGBT transistors), and the PFC switch transistor in the intelligent power module is a SiC-based power switch device (such as SiC-based MOSFET transistors), this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 2, that is, the first buck module 1062 in the first voltage regulation module 106 buck-regulates the input 20V voltage to a 15V voltage suitable for driving the upper-bridge switch transistor (Si-based power switch device) and the lower-bridge switch transistor (Si-based power switch device); at the same time, this embodiment can also control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 connect to the terminal labeled 0, that is, the second voltage regulation module 107 directly outputs a 20V driving voltage to the driving voltage input terminals of the PFC logic buffer circuit 104 and the PFC driving circuit 105, and further provides a 20V driving voltage for the PFC switch transistor (SiC-based power switch device) connected to the output terminal of the PFC driving circuit 105;

[0053] In this embodiment, when the voltage of the working voltage input terminal VDD0 is 20V and the upper-bridge switch transistor, lower-bridge switch transistor, and PFC switch transistor in the intelligent power module are Si-based power switch devices, this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 2. At the same time, control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 also connect to the terminal labeled 2, that is, both the first voltage regulation module 106 and the second voltage regulation module 107 perform step-down processing on the 20V voltage input by the working voltage input terminal VDD0 to output a 15V driving voltage suitable for driving Si-based power switch devices;

[0054] In this embodiment, when the voltage of the working voltage input terminal VDD0 is 20V and the upper-bridge switch transistor, lower-bridge switch transistor, and PFC switch transistor in the intelligent power module are SiC-based power switch devices, this embodiment can control the first voltage regulation control signal of the first voltage regulation control input terminal RS1 to make the first analog switch 1063 in the first voltage regulation module 106 connect to the terminal labeled 0. At the same time, control the second voltage regulation control signal of the second voltage regulation control input terminal RS2 to make the second analog switch 1073 in the second voltage regulation module 107 also connect to the terminal labeled 0, that is, both the first voltage regulation module 106 and the second voltage regulation module 107 output a 20V driving voltage suitable for driving SiC-based power switch devices.

[0055] In summary, since the driving IC circuit 100 of the intelligent power module in this embodiment is provided with the first voltage regulating module 106 and the second voltage regulating module 107, and since both the first voltage regulating module 106 and the second voltage regulating module 107 can achieve a boosting function and a bucking function, and can switch between different driving voltages by adjusting the voltage regulating control signals of the first voltage regulating control input terminal RS1 and the second voltage regulating control input terminal RS2, the problem that the driving IC of the existing intelligent power module cannot directly drive the SiC-based power switch device is solved. That is, the driving IC circuit 100 of the intelligent power module in this embodiment can be applied to driving traditional Si-based power switch devices, such as Si-based IGBT devices, and can also be applied to driving SiC-based power switch devices, such as wide-bandgap power switch devices like SiC-based MOSFET tubes. That is, the driving IC circuit 100 of the intelligent power module in this embodiment has great flexibility, and at the same time reduces the difficulty of the electronic control design, and is very suitable for occasions that require both traditional Si-based power switch devices and SiC-based power switch devices, which is beneficial to the performance improvement and popularization of the application of SiC-based power switch devices.

[0056] Figure 4 FIG. is a schematic circuit diagram of the second embodiment of the driving IC circuit of the intelligent power module of the present invention. Referring to Figure 4 , in this embodiment, the driving IC circuit 200 of the intelligent power module includes a working voltage input terminal VDD0, an inverter logic buffer circuit 101, an upper bridge driving circuit 102, a lower bridge driving circuit 103, a PFC logic buffer circuit 104, a PFC driving circuit 105, a voltage regulating control input terminal RS, and a voltage regulating module 108.

[0057] In this embodiment, the voltage regulating control input terminal RS is used to input a voltage regulating control signal;

[0058] The voltage regulating module 108 is used to perform voltage regulation processing on the voltage input from the working voltage input terminal VDD0 according to the voltage regulating control signal input from the voltage regulating control input terminal RS, and provide a driving input voltage for the inverter logic buffer circuit 101, the upper bridge driving circuit 102, the lower bridge driving circuit 103, the PFC logic buffer circuit 104, and the PFC driving circuit 105; or directly output the voltage input from the working voltage input terminal VDD0 to the driving voltage input terminals of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, the lower bridge driving circuit 103, the PFC logic buffer circuit 104, and the PFC driving circuit 105.

[0059] In this embodiment, the input end RS of the voltage regulating module is connected to the working voltage input end VDD0, the control end of the voltage regulating module 108 is connected to the voltage regulating control input end RS, and the output end of the voltage regulating module 108 is respectively connected to the driving voltage input ends of the inverter logic buffer circuit 101, the upper bridge driving circuit 102, the lower bridge driving circuit 103, the PFC logic buffer circuit 104 and the PFC driving circuit 105; in this embodiment, the output end of the inverter logic buffer circuit 101 is respectively connected to the input end of the upper bridge driving circuit 102 and the input end of the lower bridge driving circuit 103, and the output end of the PFC logic buffer circuit 104 is further connected to the input end of the PFC driving circuit 105. IN1, IN2 and IN3 in the figure are the upper bridge control input ends of the driving IC circuit 200 of the intelligent power module in this embodiment, IN4, IN5 and IN6 in the figure are the lower bridge control input ends of the driving IC circuit 200 of the intelligent power module in this embodiment, and IN7 in the figure is the PFC input end of the driving IC circuit 200 of the intelligent power module in this embodiment. Among them, IN1, IN2, IN3, IN4, IN5 and IN6 are connected to the inverter logic buffer circuit 101, and IN7 is connected to the PFC logic buffer circuit. HO1 in the figure is the first output end of the upper bridge driving circuit 102, HO2 is the second output end of the upper bridge driving circuit 102, HO3 is the third output end of the upper bridge driving circuit 102, LO1 in the figure is the first output end of the lower bridge driving circuit 103, LO2 is the second output end of the lower bridge driving circuit 103, LO3 is the third output end of the lower bridge driving circuit 103, and PFCO in the figure is the output end of the PFC driving circuit 105. Among them, the first output end HO1, the second output end HO2 and the third output end HO3 of the upper bridge driving circuit 102 are respectively connected to the control ends of the corresponding upper bridge arm switching tubes (not shown in the figure) in the intelligent power module, the first output end LO1, the second output end LO2 and the third output end LO3 of the lower bridge driving circuit 103 are respectively connected to the control ends of the corresponding upper bridge arm switching tubes (not shown in the figure) in the intelligent power module, and the output end PFCO of the PFC driving circuit 105 is connected to the control end of the PFC switching tube (not shown in the figure) in the intelligent power module.

[0060] Figure 5 It is a schematic structural diagram of an embodiment of the voltage regulating module in the second embodiment of the driving IC circuit of the intelligent power module of the present invention. Refer to Figure 4 and Figure 5, in this embodiment, the voltage regulation module 108 includes a step-down module 1081 and an analog switch 1082. The input end of the step-down module 1081 is connected to the working voltage input end VDD0. The output end of the step-down module 108 is connected to the first input end of the analog switch 1082 (corresponding to the end labeled 1 in the analog switch 1082). The second input end of the analog switch 1082 (corresponding to the end labeled 0 in the analog switch 1082) is directly connected to the working voltage input end VDD0. The common end of the analog switch 1082 is respectively connected to the drive voltage input ends of the inverter logic buffer circuit 101, the upper bridge drive circuit 102, the lower bridge drive circuit 103, the PFC logic buffer circuit 104, and the PFC drive circuit 105. The voltage of the common end of the analog switch 1082 is VDD, and the control end of the analog switch 1082 is connected to the voltage regulation control input end RS. In this embodiment, the voltage of the working voltage input end is 20V.

[0061] In this embodiment, if the voltage of the working voltage input end is 20V, and if the upper bridge arm switch device, the lower bridge arm switch device, and the PFC switch device in the intelligent power module are Si-based power switch devices, then in this embodiment, by controlling the voltage regulation control signal of the voltage regulation control input end RS, the analog switch 1082 in the voltage regulation module 108 can be switched to the end labeled 1, so that the voltage regulation module 108 can step down the 20V voltage input from the working voltage input end VDD0 to output a 15V drive voltage suitable for driving Si-based power switch devices; in this embodiment, if the upper bridge arm switch device, the lower bridge arm switch device, and the PFC switch device in the intelligent power module are SiC-based power switch devices, then in this embodiment, by controlling the voltage regulation control signal of the voltage regulation control input end RS, the analog switch 1082 in the voltage regulation module 108 can be switched to the end labeled 0, so that the voltage regulation module 108 directly outputs a 20V drive voltage suitable for driving SiC-based power switch devices.

[0062] Figure 6 It is a schematic structural diagram of another embodiment of the voltage regulation module in the second embodiment of the drive IC circuit of the intelligent power module of the present invention. Refer to Figure 4 and Figure 6, in this embodiment, the voltage regulation module 108 includes a boost module 1081' and an analog switch 1082'. The input end of the boost module 1081' is connected to the working voltage input end VDD0. The output end of the boost module 1081' is connected to the first input end of the analog switch 1082' (corresponding to the end labeled 1 in the analog switch 1082'). The second input end of the analog switch 1082' (corresponding to the end labeled 0 in the analog switch 1082') is directly connected to the working voltage input end VDD0. The common end of the analog switch 1082' is respectively connected to the drive voltage input ends of the inverter logic buffer circuit 101, the upper bridge drive circuit 102, the lower bridge drive circuit 103, the PFC logic buffer circuit 104, and the PFC drive circuit 105. The control end of the analog switch 1082' is connected to the voltage regulation control input end RS.

[0063] In this embodiment, if the voltage of the working voltage input end is 15V, and if the upper bridge arm switch device, the lower bridge arm switch device, and the PFC switch device in the intelligent power module are Si-based power switch devices, then in this embodiment, by controlling the voltage regulation control signal of the voltage regulation control input end RS, the analog switch 1082' in the voltage regulation module 108 can be switched to the end labeled 0, so that the voltage regulation module 108 directly outputs a 15V drive voltage suitable for driving the Si-based power switch device. In this embodiment, if the upper bridge arm switch device, the lower bridge arm switch device, and the PFC switch device in the intelligent power module are SiC-based power switch devices, then in this embodiment, by controlling the voltage regulation control signal of the voltage regulation control input end RS, the analog switch 1082 in the voltage regulation module 108 can be switched to the end labeled 1, so that the voltage regulation module 108 boosts the 15V voltage input from the working voltage input end VDD0 to output a 20V drive voltage suitable for driving the SiC-based power switch device.

[0064] In summary, since the drive IC circuit 200 of the intelligent power module in this embodiment is provided with the voltage regulation module 108, and in this embodiment, the voltage regulation module 108 can achieve a buck function (corresponding to Figure 5 ) or a boost function (corresponding to Figure 6) When the upper-bridge-arm switch, lower-bridge-arm switch, and PFC switch in the intelligent power module are all Si-based power switch devices or the upper-bridge-arm switch, lower-bridge-arm switch, and PFC switch in the intelligent power module are all SiC-based power switch devices, in this embodiment, the switching between different driving voltages can be realized by adjusting the voltage regulation control signal of the voltage regulation control input terminal RS, thus solving the problem that the driving IC of the existing intelligent power module cannot directly drive SiC-based power switch devices. That is, the driving IC circuit 200 of the intelligent power module in this embodiment can be applied to drive traditional Si-based power switch devices, such as Si-based IGBT devices, and can also be applied to drive SiC-based power switch devices, such as wide-bandgap power switch devices like SiC-based MOSFET tubes. That is, the driving IC circuit 200 of the intelligent power module in this embodiment has great flexibility, and at the same time reduces the difficulty of the electronic control design. The driving IC circuit 200 of the intelligent power module in this embodiment is very suitable for the occasions where all switch tubes adopt traditional Si-based power switch devices or all switch tubes adopt SiC-based power switch devices, which is beneficial to the performance display and popularization of the application of SiC-based power switch devices.

[0065] The present invention also provides an intelligent power module. Figure 7 It is a schematic structural diagram of the first embodiment of the intelligent power module of the present invention. Refer to Figure 7 , the intelligent power module 300 includes a low-voltage area power supply input terminal VCC, a first voltage regulation terminal CTR1, a second voltage regulation terminal CTR1, a first upper-bridge-arm control input terminal HIN1, a second upper-bridge-arm control input terminal HIN2, a third upper-bridge-arm control input terminal HIN3, a first lower-bridge-arm control input terminal LIN1, a second lower-bridge-arm control input terminal LIN2, a third lower-bridge-arm control input terminal LIN3, a PFC control input terminal PFCIN, a plurality of resistors (such as resistor R11, resistor R21, resistor R31, resistor R41, and resistor R42 in the figure), a first upper-bridge-arm switch tube PD11, a second upper-bridge-arm switch (not shown in the figure), a third upper-bridge-arm switch tube (not shown in the figure), a first lower-bridge-arm switch tube PD21, a second lower-bridge-arm switch tube (not shown in the figure), a third lower-bridge-arm switch tube (not shown in the figure), a PFC switch tube PD31, and a driving IC circuit of the intelligent power module. The driving IC circuit of the intelligent power module in this embodiment is the driving IC circuit 100 of the intelligent power module as described above (i.e., corresponding to Figure 1 the driving IC circuit 100 of the intelligent power module shown).

[0066] Refer to together Figure 7 and Figure 1, in this embodiment, the power supply input terminal VCC of the low-voltage area is connected to the working voltage input terminal VDD0 of the driving IC circuit 100 of the intelligent power module. The first voltage regulation terminal CTR1 is connected to the first voltage regulation control input terminal RS1 of the driving IC circuit 100 of the intelligent power module. The second voltage regulation terminal CTR2 is connected to the second voltage regulation control input terminal RS2 of the driving IC circuit 100 of the intelligent power module. The first upper bridge arm control input terminal HIN1 is connected to the IN1 terminal of the driving IC circuit 100 of the intelligent power module. The second upper bridge arm control input terminal HIN2 is connected to the IN2 terminal of the driving IC circuit 100 of the intelligent power module. The third upper bridge arm control input terminal HIN3 is connected to the IN3 terminal of the driving IC circuit 100 of the intelligent power module. The first lower bridge arm control input terminal LIN1 is connected to the IN4 terminal of the driving IC circuit 100 of the intelligent power module. The second lower bridge arm control input terminal LIN2 is connected to the IN5 terminal of the driving IC circuit 100 of the intelligent power module. The third lower bridge arm control input terminal LIN3 is connected to the IN6 terminal of the driving IC circuit 100 of the intelligent power module. The PFC control input terminal PFCIN is connected to the IN7 terminal of the driving IC circuit 100 of the intelligent power module. The first output terminal HO1 of the upper bridge driving circuit 102 in the driving IC circuit 100 of the intelligent power module is connected to the control terminal of the first upper bridge arm switching tube PD11 through the resistor R11. In this embodiment, the second output terminal HO2 of the upper bridge driving circuit 102 is connected to the control terminal of the second upper bridge arm switching tube (not shown in the figure) through a resistor (not shown in the figure) ( Figure 7 the connection structure of the second upper bridge arm switching tube is not shown in the figure, and its connection structure is the same as that of the first upper bridge arm switching tube PD11), and the third output terminal HO3 of the upper bridge driving circuit 102 is connected to the control terminal of the third upper bridge arm switching tube (not shown in the figure) through a resistor (not shown in the figure) ( Figure 7 the connection structure of the third upper bridge arm switching tube is not shown in the figure, and its connection structure is the same as that of the first upper bridge arm switching tube PD11); the first output terminal LO1 of the lower bridge driving circuit 103 in the driving IC circuit 100 of the intelligent power module is connected to the control terminal of the first lower bridge arm switching tube PD21 through the resistor R21. The second output terminal LO2 of the lower bridge driving circuit 103 is connected to the control terminal of the second lower bridge arm switching tube (not shown in the figure) through a resistor (not shown in the figure) ( Figure 7 the connection structure of the second lower bridge arm switching tube is not shown in the figure, and its connection structure is the same as that of the first lower bridge arm switching tube PD21), and the third output terminal L03 of the lower bridge driving circuit 103 is connected to the control terminal of the third lower bridge arm switching tube (not shown in the figure) through a resistor (not shown in the figure) ( Figure 7The connection structure of the third lower bridge arm switch tube is not shown in the figure, and its connection structure is the same as that of the first lower bridge arm switch tube PD21); the output terminal PFCO of the PFC driving circuit 105 is connected to the control terminal of the PFC switch tube PD31 through the resistor R31. In this embodiment, the first upper bridge arm switch tube PD11, the second upper bridge arm switch tube (not shown in the figure), the third upper bridge arm switch tube (not shown in the figure), the first lower bridge arm switch tube PD21, the second lower bridge arm switch tube (not shown in the figure), the third lower bridge arm switch tube (not shown in the figure), and the PFC switch tube PD31 are Si-based IGBT tubes or SiC-based MOSFET tubes. Preferably, in this embodiment, the first upper bridge arm switch tube PD11, the second upper bridge arm switch tube (not shown in the figure), the third upper bridge arm switch tube (not shown in the figure), the first lower bridge arm switch tube PD21, the second lower bridge arm switch tube (not shown in the figure), and the third lower bridge arm switch tube (not shown in the figure) are Si-based IGBT tubes, and the PFC switch tube PD31 is an SiC-based MOSFET tube. In this embodiment, the voltage of the low-voltage area power supply input terminal VCC is 15V or 20V.

[0067] In this embodiment, the intelligent power module 300 further includes a first high-voltage area power supply input terminal P1, a second high-voltage area power supply input terminal P2, and a plurality of freewheeling diodes (such as D11 and D21 in the figure). In this embodiment, when the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), the third upper-bridge arm switching transistor (not shown in the figure), the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), and the third lower-bridge arm switching transistor (not shown in the figure) are Si-based IGBT transistors, and the PFC switching transistor PD31 is a SiC-based MOSFET transistor, the collectors of the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), and the third upper-bridge arm switching transistor (not shown in the figure) are connected to the first high-voltage area power supply input terminal P1. The emitter of the first upper-bridge arm switching transistor PD11 is connected to the collector of the first lower-bridge arm switching transistor PD21. The emitter of the second upper-bridge arm switching transistor (not shown in the figure) is connected to the collector of the second lower-bridge arm switching transistor (not shown in the figure). The emitter of the third upper-bridge arm switching transistor (not shown in the figure) is connected to the collector of the third lower-bridge arm switching transistor (not shown in the figure). The emitters of the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), and the third lower-bridge arm switching transistor (not shown in the figure) are all grounded through a resistor R42. In this embodiment, when the PFC switching transistor PD31 is a SiC-based NMOS transistor, the drain of the PFC switching transistor PD31 is connected to the second high-voltage area power supply input terminal P2, and the source of the PFC switching transistor PD31 is grounded through a resistor R41. The cathode of the freewheeling diode D11 is connected to the collector of the first upper-bridge arm switching transistor PD11, and the anode of the freewheeling diode D11 is connected to the emitter of the first upper-bridge arm switching transistor PD11. The cathode of the freewheeling diode D21 is connected to the collector of the first lower-bridge arm switching transistor PD21, and the anode of the freewheeling diode D21 is connected to the emitter of the first lower-bridge arm switching transistor PD21. Similarly, a freewheeling diode (not shown in the figure) is also connected between the collector and the emitter of the second upper-bridge arm switching transistor, the third upper-bridge arm switching transistor, the second lower-bridge arm switching transistor, and the third lower-bridge arm switching transistor. In this embodiment, the connection node between the first upper-bridge arm switching transistor PD11 and the first lower-bridge arm switching transistor PD21, the connection node between the second upper-bridge arm switching transistor and the second lower-bridge arm switching transistor, and the connection node between the third upper-bridge arm switching transistor and the third lower-bridge arm switching transistor are connected to the motor M.

[0068] In the intelligent power module 300 of this embodiment, since the first voltage regulating module 106 and the second voltage regulating module 107 are provided in the driving IC circuit 100 of the intelligent power module, and since both the first voltage regulating module 106 and the second voltage regulating module 107 can achieve a boost function and can also achieve a buck function, and can realize the switching between different driving voltages by adjusting the voltage regulating control signals of the first voltage regulating control input terminal RS1 and the second voltage regulating control input terminal RS2, thus solving the problem that the driving IC in the existing intelligent power module cannot directly drive the SiC-based power switch device, that is, the driving IC circuit 100 of the intelligent power module in this embodiment can be applicable to driving traditional Si-based power switch devices, such as Si-based IGBT devices, and can also be applicable to driving SiC-based power switch devices, such as wide bandgap power switch devices like SiC-based MOSFET tubes, etc. That is, the intelligent power module 300 in this embodiment has very high flexibility, and at the same time reduces the difficulty of the electronic control design, and is very suitable for occasions that require both traditional Si-based power switch devices and SiC-based power switch devices, which is conducive to the performance exertion and popularization of the application of SiC-based power switch devices.

[0069] Figure 8 FIG. is a schematic structural diagram of the second embodiment of the intelligent power module of the present invention. Referring to Figure 8 , this intelligent power module 400 includes a low-voltage area power supply input terminal VCC, a voltage regulating terminal CTR, a first upper bridge arm control input terminal HIN1, a second upper bridge arm control input terminal HIN2, a third upper bridge arm control input terminal HIN3, a first lower bridge arm control input terminal LIN1, a second lower bridge arm control input terminal LIN2, a third lower bridge arm control input terminal LIN3, a PFC control input terminal PFCIN, a plurality of resistors (such as resistor R11, resistor R21, resistor R31, resistor R41 and resistor R42 in the figure), a first upper bridge arm switch tube PD11, a second upper bridge arm switch (not shown in the figure), a third upper bridge arm switch tube (not shown in the figure), a first lower bridge arm switch tube PD21, a second lower bridge arm switch tube (not shown in the figure), a third lower bridge arm switch tube (not shown in the figure), a PFC switch tube PD31, and a driving IC circuit of the intelligent power module. The driving IC circuit of the intelligent power module in this embodiment is the driving IC circuit 200 of the intelligent power module as described above (i.e., corresponding to Figure 4 the driving IC circuit 200 of the intelligent power module shown).

[0070] Referring to Figure 8 and Figure 4, in this embodiment, the power supply input terminal VCC of the low-voltage area is connected to the working voltage input terminal VDD0 of the driving IC circuit 200 of the intelligent power module. The voltage regulating terminal CTR is connected to the voltage regulating control input terminal RS of the driving IC circuit 200 of the intelligent power module. The connection relationships of other components in this embodiment are the same as those of the above-mentioned intelligent power module 300, and will not be elaborated here.

[0071] It should be noted that in this embodiment, the first upper-bridge arm switching tube PD11, the second upper-bridge arm switching tube (not shown in the figure), the third upper-bridge arm switching tube (not shown in the figure), the first lower-bridge arm switching tube PD21, the second lower-bridge arm switching tube (not shown in the figure), the third lower-bridge arm switching tube (not shown in the figure), and the PFC switching tube PD31 are Si-based IGBT tubes, or the first upper-bridge arm switching tube PD11, the second upper-bridge arm switching tube (not shown in the figure), the third upper-bridge arm switching tube (not shown in the figure), the first lower-bridge arm switching tube PD21, the second lower-bridge arm switching tube (not shown in the figure), the third lower-bridge arm switching tube (not shown in the figure), and the PFC switching tube PD31 are SiC-based MOSFET tubes.

[0072] In this embodiment, when the voltage of the power supply input terminal VCC of the low-voltage area is 15V, the driving IC circuit 200 of the intelligent power module adopts Figure 6 the voltage regulating module 108 shown. Specifically, when the first upper-bridge arm switching tube PD11, the second upper-bridge arm switching tube (not shown in the figure), the third upper-bridge arm switching tube (not shown in the figure), the first lower-bridge arm switching tube PD21, the second lower-bridge arm switching tube (not shown in the figure), the third lower-bridge arm switching tube (not shown in the figure), and the PFC switching tube PD31 are Si-based IGBT tubes, in this embodiment, the voltage regulating control signal of the voltage regulating control input terminal RS can be controlled to make the analog switch 1082' in the voltage regulating module 108 switch to the terminal labeled 0, so that the voltage regulating module 108 directly outputs a 15V driving voltage suitable for driving Si-based power switching devices; in this embodiment, when the first upper-bridge arm switching tube PD11, the second upper-bridge arm switching tube (not shown in the figure), the third upper-bridge arm switching tube (not shown in the figure), the first lower-bridge arm switching tube PD21, the second lower-bridge arm switching tube (not shown in the figure), the third lower-bridge arm switching tube (not shown in the figure), and the PFC switching tube PD31 are SiC-based power switching devices, then in this embodiment, the voltage regulating control signal of the voltage regulating control input terminal RS can be controlled to make the analog switch 1082 in the voltage regulating module 108 switch to the terminal labeled 1, so that the voltage regulating module 108 boosts the 15V voltage input by the working voltage input terminal VDD0 to output a 20V driving voltage suitable for driving SiC-based power switching devices.

[0073] In this embodiment, when the voltage of the power supply input terminal VCC of the low-voltage region is 20V, the driving IC circuit 200 of the intelligent power module adopts Figure 5 the voltage regulating module 108 shown. Specifically, when the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), the third upper-bridge arm switching transistor (not shown in the figure), the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), the third lower-bridge arm switching transistor (not shown in the figure), and the PFC switching transistor PD31 are Si-based power switching devices, then in this embodiment, by controlling the voltage regulating control signal of the voltage regulating control input terminal RS, the analog switch 1082 in the voltage regulating module 108 can be switched to the terminal labeled 1, so that the voltage regulating module 108 can step down the 20V voltage input from the working voltage input terminal VDD0 to output a 15V driving voltage suitable for driving Si-based power switching devices; in this embodiment, when the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), the third upper-bridge arm switching transistor (not shown in the figure), the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), the third lower-bridge arm switching transistor (not shown in the figure), and the PFC switching transistor PD31 are SiC-based power switching devices, then in this embodiment, by controlling the voltage regulating control signal of the voltage regulating control input terminal RS, the analog switch 1082 in the voltage regulating module 108 can be switched to the terminal labeled 0, so that the voltage regulating module 108 directly outputs a 20V driving voltage suitable for driving SiC-based power switching devices.

[0074] In summary, for the intelligent power module 400 in this embodiment, since the voltage regulating module 108 is provided in the driving IC circuit 200 of the intelligent power module, and in this embodiment, the voltage regulating module 108 can achieve a step-down function (corresponding to Figure 5 ) or a step-up function (corresponding to Figure 6) When the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), the third upper-bridge arm switching transistor (not shown in the figure), the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), the third lower-bridge arm switching transistor (not shown in the figure), and the PFC switching transistor PD31 in the intelligent power module 400 of this embodiment are all Si-based power switching devices, or when the first upper-bridge arm switching transistor PD11, the second upper-bridge arm switching transistor (not shown in the figure), the third upper-bridge arm switching transistor (not shown in the figure), the first lower-bridge arm switching transistor PD21, the second lower-bridge arm switching transistor (not shown in the figure), the third lower-bridge arm switching transistor (not shown in the figure), and the PFC switching transistor PD31 are all SiC-based power switching devices, this embodiment can achieve the switching between different driving voltages by adjusting the voltage regulation control signal of the voltage regulation control input terminal RS, thus solving the problem that the driving IC of the existing intelligent power module cannot directly drive SiC-based power switching devices. That is, the driving IC circuit 200 of the intelligent power module of this embodiment can be applied to drive traditional Si-based power switching devices, such as Si-based IGBT devices, and can also be applied to drive SiC-based power switching devices, such as wide bandgap power switching devices like SiC-based MOSFET tubes. That is, the intelligent power module 400 of this embodiment has great flexibility, and at the same time reduces the difficulty of the electronic control design. The intelligent power module 400 of this embodiment is very suitable for the occasions where all switching transistors adopt traditional Si-based power switching devices or all switching transistors adopt SiC-based power switching devices, which is beneficial to the performance display and popularization of the application of SiC-based power switching devices.

[0075] The present invention also provides an air conditioner, which includes an intelligent power module. The structure of the intelligent power module can refer to the above embodiment and will not be elaborated here. Naturally, since the air conditioner of this embodiment adopts the technical solution of the above intelligent power module, the air conditioner has all the beneficial effects of the above intelligent power module.

[0076] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A driving IC circuit of an intelligent power module, characterized in that, The driving IC circuit includes a working voltage input terminal, an inverter logic buffer circuit, an upper bridge driving circuit, a lower bridge driving circuit, a PFC logic buffer circuit, a PFC driving circuit, a first voltage regulation control input terminal, a second voltage regulation control input terminal, a first voltage regulation module, and a second voltage regulation module; wherein: The first voltage regulation control input terminal is used for inputting a first voltage regulation control signal; The first voltage regulation module is configured to boost or buck the voltage input from the working voltage input terminal according to the first voltage regulation control signal, and provide a driving input voltage for the inverter logic buffer circuit, the upper bridge driving circuit, and the lower bridge driving circuit; or directly output the voltage input from the working voltage input terminal to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, and the lower bridge driving circuit; The second voltage regulation control input terminal is used for inputting a second voltage regulation control signal; The second voltage regulation module is configured to boost or buck the voltage input from the working voltage input terminal according to the second voltage regulation control signal, and provide a driving input voltage for the PFC logic buffer circuit and the PFC driving circuit; or directly output the voltage input from the working voltage input terminal to the driving voltage input terminals of the PFC logic buffer circuit and the PFC driving circuit; Wherein, the driving IC circuit further includes an upper bridge control input terminal and a lower bridge control input terminal, and the upper bridge control input terminal and the lower bridge control input terminal are respectively connected to the inverter logic buffer circuit.

2. The driving IC circuit of the intelligent power module according to claim 1, characterized in that The input terminal of the first voltage regulation module is connected to the working voltage input terminal, the control terminal of the first voltage regulation module is connected to the first voltage regulation control input terminal, and the output terminal of the first voltage regulation module is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, and the lower bridge driving circuit; the input terminal of the second voltage regulation module is connected to the working voltage input terminal, the control terminal of the second voltage regulation module is connected to the second voltage regulation control input terminal, and the output terminal of the second voltage regulation module is respectively connected to the driving voltage input terminals of the PFC logic buffer circuit and the PFC driving circuit; the output terminal of the inverter logic buffer circuit is respectively connected to the input terminal of the upper bridge driving circuit and the input terminal of the lower bridge driving circuit, and the output terminal of the PFC logic buffer circuit is connected to the input terminal of the PFC driving circuit.

3. The driving IC circuit of the intelligent power module according to claim 1, wherein The first voltage regulation module includes a first boost module, a first buck module, and a first analog switch. The input terminals of the first boost module and the first buck module are connected to the working voltage input terminal. The output terminal of the first boost module is connected to the first input terminal of the first analog switch. The output terminal of the first buck module is connected to the second input terminal of the first analog switch. The third input terminal of the first analog switch is directly connected to the working voltage input terminal. The common terminal of the first analog switch is respectively connected to the driving voltage input terminals of the inverter logic buffer circuit, the upper bridge driving circuit, and the lower bridge driving circuit. The control terminal of the first analog switch is connected to the first voltage regulation control input terminal.

4. The driving IC circuit of the intelligent power module according to claim 1, characterized in that, The second voltage regulation module includes a second boost module, a second buck module, and a second analog switch. The input ends of the second boost module and the second buck module are connected to the working voltage input end. The output end of the second boost module is connected to the first input end of the second analog switch. The output end of the second buck module is connected to the second input end of the second analog switch. The third input end of the second analog switch is directly connected to the working voltage input end. The common end of the second analog switch is respectively connected to the driving voltage input ends of the PFC logic buffer circuit and the PFC driving circuit. The control end of the second analog switch is connected to the second voltage regulation control input end.

5. A driving IC circuit for an intelligent power module, characterized in that, The driving IC circuit includes a working voltage input end, an inverter logic buffer circuit, an upper bridge driving circuit, a lower bridge driving circuit, a PFC logic buffer circuit, a PFC driving circuit, a voltage regulation control input end, and a voltage regulation module; wherein: The voltage regulation control input end is used for inputting a voltage regulation control signal; The voltage regulation module is used for regulating the voltage input from the working voltage input end according to the voltage regulation control signal input from the voltage regulation control input end, and providing a driving input voltage for the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit; or directly outputting the voltage input from the working voltage input end to the driving voltage input ends of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit; Wherein, the driving IC circuit further includes an upper bridge control input end and a lower bridge control input end, and the upper bridge control input end and the lower bridge control input end are respectively connected to the inverter logic buffer circuit.

6. The driving IC circuit of the intelligent power module according to claim 5, characterized in that, The input end of the voltage regulation module is connected to the working voltage input end, the control end of the voltage regulation module is connected to the voltage regulation control input end, and the output end of the voltage regulation module is respectively connected to the driving voltage input ends of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit; the output end of the inverter logic buffer circuit is respectively connected to the input end of the upper bridge driving circuit and the input end of the lower bridge driving circuit, and the output end of the PFC logic buffer circuit is further connected to the input end of the PFC driving circuit.

7. The driving IC circuit of the intelligent power module according to claim 5, characterized in that, The voltage regulation module includes a buck module and an analog switch. The input end of the buck module is connected to the working voltage input end. The output end of the buck module is connected to the first input end of the analog switch. The second input end of the analog switch is directly connected to the working voltage input end. The common end of the analog switch is respectively connected to the driving voltage input ends of the inverter logic buffer circuit, the upper bridge driving circuit, the lower bridge driving circuit, the PFC logic buffer circuit, and the PFC driving circuit. The control end of the analog switch is connected to the voltage regulation control input end.

8. The driving IC circuit of the intelligent power module according to claim 5, characterized in that, The voltage regulating module includes a boost module and an analog switch. The input end of the boost module is connected to the working voltage input end. The output end of the boost module is connected to the first input end of the analog switch. The second input end of the analog switch is directly connected to the working voltage input end. The common end of the analog switch is respectively connected to the drive voltage input ends of the inverter logic buffer circuit, the upper bridge drive circuit, the lower bridge drive circuit, the PFC logic buffer circuit and the PFC drive circuit. The control end of the analog switch is connected to the voltage regulating control input end.

9. An air conditioner, characterized in that, The air conditioner includes a drive IC circuit of the intelligent power module as described in any one of claims 1-8.

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