CN110601602A

CN110601602A - Drive IC circuit of intelligent power module, intelligent power module and air conditioner

Info

Publication number: CN110601602A
Application number: CN201810618400.7A
Authority: CN
Inventors: 李叶生; 冯宇翔
Original assignee: Midea Group Co Ltd; Chongqing Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; Chongqing Midea Refrigeration Equipment Co Ltd
Priority date: 2018-06-13
Filing date: 2018-06-13
Publication date: 2019-12-20

Abstract

The invention discloses a driving IC circuit of an intelligent power module, the intelligent power module and an air conditioner, wherein the driving IC circuit comprises a driving voltage input end, a first motor driving circuit, a second motor driving circuit, a PFC driving circuit and a booster circuit; the first motor driving circuit drives an upper bridge arm switching tube and a lower bridge arm switching tube corresponding to an external first motor to work; the second motor driving circuit drives an upper bridge arm switching tube and a lower bridge arm switching tube corresponding to an external second motor to work; the PFC driving circuit drives an external PFC switching tube to work; the driving voltage input end provides driving input voltage for the first motor driving circuit and provides input voltage for the booster circuit; the boost circuit boosts the input voltage to provide a driving input voltage for the second motor driving circuit and the PFC driving circuit. The invention improves the integration level of the intelligent power module and can simultaneously drive the Si-based power switch device and the SiC-based power switch device.

Description

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

Technical Field

The invention relates to the field of intelligent power modules, in particular to a driving IC circuit of an intelligent power module, the intelligent power module and an air conditioner.

Background

An intelligent Power module, i.e., ipm (intelligent Power module), is a Power driving product combining Power electronics and integrated circuit technology. The intelligent power module integrates a power switch device and a high-voltage driving circuit and is internally provided with fault detection circuits such as overvoltage, overcurrent and overheat. The intelligent power module receives a control signal of the MCU to drive a subsequent circuit to work on one hand, and sends a state detection signal of the system back to the MCU on the other hand. Compared with the traditional discrete scheme, the intelligent power module wins a bigger and bigger market with the advantages of high integration degree, high reliability and the like, is particularly suitable for a frequency converter of a driving motor 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.

The IPM is widely applied to the air conditioner, the existing inverter air conditioner comprises a fan, a compressor and a PFC module, and the fan, the compressor and the PFC module of the existing inverter air conditioner are usually driven by three separate IPMs, so that the inverter air conditioner has high electric control manufacturing cost and low reliability, and the wiring difficulty of a circuit system is also high. With the continuous increase of the using amount of the variable frequency air conditioner, the failure case of the variable frequency air conditioner is increased, and the failure reason of the variable frequency air conditioner in the prior art is usually due to the failure of a driving system of the variable frequency air conditioner; in addition, the inverter air conditioner is relatively expensive compared to the fixed frequency air conditioner, how to reduce the manufacturing cost of the driving system of the inverter air conditioner becomes an important research topic, and high integration, miniaturization and cost reduction are the development trend of the IPM of the inverter air conditioner in the future. A plurality of parts of 5 parts including a control chip MCU, a rectifier bridge, a part of active PFC, a compressor IPM and a fan IPM on a frequency conversion plate of a traditional frequency conversion air conditioner are integrated into a module, namely the high-integration IPM. However, the existing high-integration IPM of the inverter air conditioner simply integrates the driving circuit of the fan and the driving circuit of the compressor, and the internal structure of the inverter air conditioner is similar to the simple superposition of the driving circuit of the fan and the driving circuit of the compressor, and the high integration and miniaturization are not realized in the true sense, so how to further optimize the high-integration IPM of the air conditioner is a problem to be solved urgently.

Moreover, the power switch device inside the existing intelligent power module is usually a Si-based power switch device, and people have already studied the Si-based power switch device quite mature, and the performance of the Si-based power switch device is about to approach the limit of the material property, so that it is difficult to greatly improve the overall performance of the intelligent power module through the ways of structure innovation, manufacturing process improvement and the like of the Si-based power switch device in the prior art. The third generation semiconductor (namely, the wide bandgap semiconductor power device) represented by the SiC-based power switch device has the advantages of high breakdown voltage, high power density, high output power, high working frequency, suitability for working at high temperature and the like, for example, the SiC-based MOSFET has very high blocking voltage, and has no trailing current similar to a Si-based IGBT tube, so that the dynamic loss of the SiC-based MOSFET is very low; and the diode of SiC material also has very low switching losses; meanwhile, the SiC material has thermal conductivity three times that of the Si material, so that the IPM module based on the SiC material has better working temperature and good reliability. In the high voltage power market, SiC-based power switching devices (such as SiC-based MOSFET transistors) are considered as perfect replacements for Si-based IGBT transistors.

However, Si-based power switches (e.g., Si-based MOSFET and Si-based IGBT) are usually suitable for operating at a driving voltage of 12-15V, and therefore, the driving voltage VDD of the smart power module in a variable frequency household appliance (e.g., a variable frequency air conditioner) is usually set to 15V, i.e., the gate driving signal (high level) of the Si-based power switch in the smart power module is 15V. However, the SiC-based power switching device (such as a SiC-based MOSFET transistor) is more suitable for operating at a driving voltage of 18-20V, so that a driving IC of the Si-based power switching device (also called a driving IC of an intelligent power module) in the existing intelligent power module is not suitable for directly driving the SiC-based power switching device. In addition, in most cases, the intelligent power module may have both a SiC-based power switching device and a Si-based power switching device, for example, a PFC switching tube in the intelligent power module generally uses the SiC-based power switching device to replace an original Si-based power switching device, so as to improve a power correction factor and further improve a power utilization rate, while an inverter device (i.e., an upper bridge arm switching tube and a lower bridge arm switching tube) in the intelligent power module still uses the Si-based power switching device, if the two devices use the same driving voltage of the Si-based power switching device, the performance of the SiC-based power switching device may not be effectively exerted.

In summary, how to optimize the highly integrated IPM of the air conditioner and enable the driving circuit in the highly integrated IPM to drive the Si-based power switch device and the SiC-based power switch device simultaneously is a problem to be solved urgently.

Disclosure of Invention

The invention mainly aims to provide a driving IC circuit of an intelligent power module, aiming at further improving the integration level of the intelligent power module and meeting the requirements of simultaneously driving a Si-based power switch device and a SiC-based power switch device.

In order to achieve the above object, the present invention provides a driving IC circuit of an intelligent power module, the driving IC circuit includes a driving voltage input terminal, a plurality of upper bridge control signal input terminals, a plurality of lower bridge control signal input terminals, a PFC control signal input terminal, a first motor driving circuit, a second motor driving circuit, a PFC driving circuit, and a boost circuit; wherein:

the first motor driving circuit is used for driving an upper bridge arm switching tube corresponding to an external first motor to work according to a control signal input by the upper bridge control signal input end, and driving a lower bridge arm switching tube corresponding to the external first motor to work according to a control signal input by the lower bridge control signal input end;

the second motor driving circuit is used for driving an upper bridge arm switching tube corresponding to an external second motor to work according to a control signal input by the upper bridge control signal input end, and driving a lower bridge arm switching tube corresponding to the external second motor to work according to a control signal input by the lower bridge control signal input end;

the PFC driving circuit is used for driving an external PFC switching tube to work according to a control signal input by the PFC control signal input end;

the driving voltage input end is used for providing driving input voltage for the first motor driving circuit and providing input voltage for the booster circuit;

the boost circuit is used for boosting the voltage input by the driving voltage input end and providing driving input voltage for the second motor driving circuit and the PFC driving circuit.

Preferably, an input end of the first motor driving circuit is connected with a corresponding upper bridge control signal input end of the plurality of upper bridge control signal input ends and a corresponding lower bridge control signal input end of the plurality of lower bridge control signal input ends, and an output end of the first motor driving circuit is connected with a control end of an upper bridge arm switching tube corresponding to an external first motor and a control end of a lower bridge arm switching tube corresponding to an external first motor;

the input end of the second motor driving circuit is connected with a corresponding upper bridge control signal input end in the plurality of upper bridge control signal input ends and a corresponding lower bridge control signal input end in the plurality of lower bridge control signal input ends, and the output end of the second motor driving circuit is connected with the control end of an upper bridge arm switching tube corresponding to an external second motor and the control end of a lower bridge arm switching tube corresponding to an external second motor;

the input end of the PFC driving circuit is connected with the input end of the PFC control signal, and the output end of the PFC driving circuit is connected with the control end of the PFC switching tube;

the input end of the booster circuit is connected with the driving voltage input end, and the output end of the booster circuit is respectively connected with the driving voltage input end of the second motor driving circuit and the driving voltage input end of the PFC driving circuit.

Preferably, the drive IC circuit further includes a first undervoltage protection circuit for undervoltage protection of the output terminal of the boost circuit, an input terminal of the first undervoltage protection circuit is connected to the output terminal of the boost circuit, and an output terminal of the first undervoltage protection circuit is connected to the second motor drive circuit and the PFC drive circuit, respectively.

Preferably, the driving IC circuit further includes an enable terminal, an error signal output terminal, a protection circuit, an error judgment logic circuit, and a driving logic circuit; wherein:

the protection circuit is used for outputting an undervoltage protection signal to the error judgment logic circuit when the driving voltage input end is undervoltage, outputting an overcurrent protection signal to the error judgment logic circuit when any one of the switch tubes is in overcurrent, and outputting an overtemperature protection signal to the error judgment logic circuit when the intelligent power module is in overtemperature;

the error judgment logic circuit is used for outputting an error signal to the error signal output end when receiving the undervoltage protection signal, the overcurrent protection signal or/and the overtemperature protection signal;

the driving logic circuit is used for outputting a starting signal to the first motor driving circuit, the second motor driving circuit and the PFC driving circuit when the error signal is not output by the error judging logic circuit and an enabling signal is input by the enabling end so as to control the first motor driving circuit, the second motor driving circuit and the PFC driving circuit to start working;

the input end of the protection circuit is respectively connected with the driving voltage input end, the current output end of each lower bridge arm switching tube and an external temperature detection circuit, the output end of the protection circuit is connected with the input end of the error judgment logic circuit, the output end of the error judgment logic circuit is connected with the error signal output end, the input end of the driving logic circuit is respectively connected with the enabling end and the error judgment logic circuit, and the output end of the driving logic circuit is respectively connected with the first motor driving circuit, the second motor driving circuit and the PFC driving circuit.

Preferably, the protection circuit comprises a second undervoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit; wherein:

the second undervoltage protection circuit is used for outputting an undervoltage protection signal to the error judgment logic circuit when the driving voltage input end is undervoltage;

the overcurrent protection circuit is used for outputting an overcurrent protection signal to the error judgment logic circuit when any one of the switching tubes is in overcurrent;

the over-temperature protection circuit is used for outputting an over-temperature protection signal to the error judgment logic circuit when the intelligent power module is over-temperature;

the input end of the second undervoltage protection circuit is connected with the driving voltage input end, the input end of the overcurrent protection circuit is respectively connected with the current output end of each lower bridge arm switch tube, the input end of the overtemperature protection circuit is connected with the external temperature detection circuit, and the output end of the second undervoltage protection circuit, the output end of the overcurrent protection circuit and the output end of the overtemperature protection circuit are connected with the input end of the error judgment logic circuit.

In addition, in order to achieve the above object, the present invention further provides a driving IC circuit of an intelligent power module, wherein the driving IC circuit includes a driving voltage input terminal, a plurality of upper bridge control signal input terminals, a plurality of lower bridge control signal input terminals, a PFC control signal input terminal, a first motor driving circuit, a second motor driving circuit, a PFC driving circuit, and a voltage dropping circuit; wherein:

the driving voltage input end is used for providing driving input voltage for the second motor driving circuit and the PFC driving circuit and providing input voltage for the voltage reduction circuit;

the voltage reduction circuit is used for reducing the voltage input by the driving voltage input end and providing driving input voltage for the first motor driving circuit.

the input end of the voltage reduction circuit is connected with the driving voltage input end, and the output end of the voltage reduction circuit is connected with the driving voltage input end of the first motor driving circuit.

Preferably, the drive IC circuit further includes a third undervoltage protection circuit for undervoltage protection of the output terminal of the step-down circuit, an input terminal of the third undervoltage protection circuit is connected to the output terminal of the step-down circuit, and an output terminal of the third undervoltage protection circuit is connected to the first motor drive circuit.

In addition, in order to achieve the above object, the present invention further provides a driving IC circuit of an intelligent power module, wherein the driving IC circuit includes a driving voltage input terminal, a plurality of upper bridge control signal input terminals, a plurality of lower bridge control signal input terminals, a PFC control signal input terminal, a first motor driving circuit, a second motor driving circuit, a PFC driving circuit, and a boost circuit; wherein:

the driving voltage input end is used for providing driving input voltage for the first motor driving circuit and the second motor driving circuit and providing input voltage for the booster circuit;

the boost circuit is used for boosting the voltage input by the driving voltage input end and providing driving input voltage for the PFC driving circuit.

the input end of the boost circuit is connected with the driving voltage input end, and the output end of the boost circuit is connected with the driving voltage input end of the PFC driving circuit.

Preferably, the drive IC circuit further includes a first undervoltage protection circuit for undervoltage protection of the output terminal of the boost circuit, an input terminal of the first undervoltage protection circuit is connected to the output terminal of the boost circuit, and an output terminal of the first undervoltage protection circuit is connected to the PFC drive circuit.

In addition, in order to achieve the above object, the present invention further provides an intelligent power module, where the intelligent power module includes a PFC switching tube, 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 corresponding to an external first motor, a fourth upper bridge arm switching tube, a fifth upper bridge arm switching tube, a sixth upper bridge arm switching tube, a fourth lower bridge arm switching tube, a fifth lower bridge arm switching tube, and a sixth lower bridge arm switching tube corresponding to an external second motor, and the driving IC circuit of the intelligent power module; wherein:

a first upper bridge output end of a first motor driving circuit in the driving IC circuit is connected with a control end of the first upper bridge arm switching tube through a resistor, a second upper bridge output end of the first motor driving circuit is connected with a control end of the second upper bridge arm switching tube through a resistor, and a third upper bridge output end of the first motor driving circuit is connected with a control end of the third upper bridge arm switching tube through a resistor; a first lower bridge output end of the first motor driving circuit is connected with a control end of the first lower bridge arm switching tube through a resistor, a second lower bridge output end of the first motor driving circuit is connected with a control end of the second lower bridge arm switching tube through a resistor, and a third lower bridge output end of the first motor driving circuit is connected with a control end of the third lower bridge arm switching tube through a resistor;

a first upper bridge output end of a second motor driving circuit in the driving IC circuit is connected with a control end of the fourth upper bridge arm switching tube through a resistor, a second upper bridge output end of the second motor driving circuit is connected with a control end of the fifth upper bridge arm switching tube through a resistor, and a third upper bridge output end of the second motor driving circuit is connected with a control end of the sixth upper bridge arm switching tube through a resistor; a first lower bridge output end of the second motor driving circuit is connected with a control end of the fourth lower bridge arm switching tube through a resistor, a second lower bridge output end of the second motor driving circuit is connected with a control end of the fifth lower bridge arm switching tube through a resistor, and a third lower bridge output end of the second motor driving circuit is connected with a control end of the sixth lower bridge arm switching tube through a resistor;

the output end of a PFC driving circuit in the driving IC circuit is connected with the control end of the PFC switching tube through the resistor.

Preferably, the intelligent power module further comprises a first current sampling resistor, a second current sampling resistor and a third current sampling resistor; wherein:

a first end of the first current sampling resistor is connected with a current output end of the PFC switch tube, a first end of the second current sampling resistor is respectively connected with current output ends of the first lower bridge arm switch tube, the second lower bridge arm switch tube and the third lower bridge arm switch tube, a first end of the third current sampling resistor is respectively connected with current output ends of the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube and the sixth lower bridge arm switch tube, and a second end of the first current sampling resistor, a second end of the second current sampling resistor and a second end of the third current sampling resistor are grounded; the first end of the first current sampling resistor is further connected with a first input end of the overcurrent protection circuit in the drive IC circuit, the first end of the second current sampling resistor is further connected with a second input end of the overcurrent protection circuit in the drive IC circuit, and the first end of the third current sampling resistor is further connected with a third input end of the overcurrent protection circuit in the drive IC circuit.

Preferably, the intelligent power module further comprises a temperature detection circuit for detecting the temperature of the intelligent power module, and the temperature detection circuit is connected with the input end of the over-temperature protection circuit in the drive IC circuit.

Preferably, the first upper bridge arm switch tube, the second upper bridge arm switch tube, the third upper bridge arm switch tube, the first lower bridge arm switch tube, the second lower bridge arm switch tube and the third lower bridge arm switch tube are Si-based IGBT tubes, and the fourth upper bridge arm switch tube, the fifth upper bridge arm switch tube, the sixth upper bridge arm switch tube, the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube, the sixth lower bridge arm switch tube and the PFC switch tube are SiC-based MOSFET tubes.

Preferably, the intelligent power module further comprises a first high-voltage area power supply input end, a second high-voltage area power supply input end, a plurality of freewheeling diodes, a PFC signal output end and a first diode; wherein:

a collector of the first upper bridge arm switching tube, a collector of the second upper bridge arm switching tube, a collector of the third upper bridge arm switching tube, a collector of the fourth upper bridge arm switching tube, a collector of the fifth upper bridge arm switching tube, and a collector of the sixth upper bridge arm switching tube are connected with the input end of the first high-voltage region power supply, an emitter of the first upper bridge arm switching tube is connected with the collector of the first lower bridge arm switching tube, an emitter of the second upper bridge arm switching tube is connected with the collector of the second lower bridge arm switching tube, an emitter of the third upper bridge arm switching tube is connected with the collector of the third lower bridge arm switching tube, an emitter of the fourth upper bridge arm switching tube is connected with the collector of the fourth lower bridge arm switching tube, and an emitter of the fifth upper bridge arm switching tube is connected with the collector of the fifth lower bridge arm switching tube, an emitter of the sixth upper bridge arm switching tube is connected with a collector of the sixth lower bridge arm switching tube; the emitter of the first lower bridge arm switching tube, the emitter of the second lower bridge arm switching tube and the emitter of the third lower bridge arm switching tube are connected with the first end of the second current sampling resistor, and the emitter of the fourth lower bridge arm switching tube, the emitter of the fifth lower bridge arm switching tube and the emitter of the sixth lower bridge arm switching tube are connected with the first end of the third current sampling resistor; a collector of the PFC switch tube is respectively connected with the PFC signal output end and an anode of the first diode, a cathode of the first diode is connected with an input end of the second high-voltage area power supply, and an emitter of the PFC switch tube is connected with a first end of the first current sampling resistor; a freewheeling diode is connected between the collector and the emitter of each switching tube;

the connection node of the first upper bridge arm switching tube and the first lower bridge arm switching tube, the connection node of the second upper bridge arm switching tube and the second lower bridge arm switching tube, and the connection node of the third upper bridge arm switching tube and the third lower bridge arm switching tube are connected with an external first motor, and the connection node of the fourth upper bridge arm switching tube and the fourth lower bridge arm switching tube, the connection node of the fifth upper bridge arm switching tube and the fifth lower bridge arm switching tube, and the connection node of the sixth upper bridge arm switching tube and the sixth lower bridge arm switching tube are connected with an external second motor.

Preferably, the intelligent power module further includes a first bootstrap circuit, a second bootstrap circuit, a third bootstrap circuit, a fourth bootstrap circuit, a fifth bootstrap circuit, and a sixth bootstrap circuit; wherein:

a first end of the first bootstrap circuit is connected with the driving voltage input end of the driving IC circuit, and a second end of the first bootstrap circuit is connected with an emitter of the first upper bridge arm switching tube and a collector of the first lower bridge arm switching tube;

a first end of the second bootstrap circuit is connected with the driving voltage input end of the driving IC circuit, and a second end of the second bootstrap circuit is connected with an emitter of the second upper bridge arm switching tube and a collector of the second lower bridge arm switching tube;

a first end of the third bootstrap circuit is connected with the driving voltage input end of the driving IC circuit, and a second end of the third bootstrap circuit is connected with an emitter of the third upper bridge arm switching tube and a collector of the third lower bridge arm switching tube;

a first end of the fourth self-lifting circuit is connected with the driving voltage input end of the driving IC circuit, and a second end of the fourth self-lifting circuit is connected with an emitter of the fourth upper bridge arm switching tube and a collector of the fourth lower bridge arm switching tube;

a first end of the fifth bootstrap circuit is connected with the driving voltage input end of the driving IC circuit, and a second end of the fifth bootstrap circuit is connected with an emitter of the fifth upper bridge arm switching tube and a collector of the fifth lower bridge arm switching tube;

a first end of the sixth bootstrap circuit is connected to the driving voltage input end of the driving IC circuit, and a second end of the sixth bootstrap circuit is connected to an emitter of the sixth upper arm switching tube and a collector of the sixth lower arm switching tube.

Preferably, the first upper bridge arm switch tube, the second upper bridge arm switch tube, the third upper bridge arm switch tube, the first lower bridge arm switch tube, the second lower bridge arm switch tube, the third lower bridge arm switch tube, the fourth upper bridge arm switch tube, the fifth upper bridge arm switch tube, the sixth upper bridge arm switch tube, the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube, and the sixth lower bridge arm switch tube are Si-based IGBT tubes, and the PFC switch tube is a SiC-based MOSFET tube.

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

The driving IC circuit of the intelligent power module integrates the first motor driving circuit for driving the upper bridge arm switching tube and the lower bridge arm switching tube corresponding to the external first motor to work, the second motor driving circuit for driving the upper bridge arm switching tube and the lower bridge arm switching tube corresponding to the external second motor to work and the PFC driving circuit for driving the external PFC switching tube to work into the same IC chip, so that the driving IC circuit of the intelligent power module further improves the integration level of the intelligent power module compared with the driving IC circuit of the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module and simultaneously improving the reliability of the intelligent power module; in addition, the driving IC circuit of the intelligent power module of the present invention is further provided with a voltage boost circuit, which can boost the voltage input by the driving voltage input terminal in the driving IC circuit of the intelligent power module of the present invention (for example, boost the 15V voltage to 18V-20V voltage) to provide the driving input voltage for the second motor driving circuit and the PFC driving circuit, thereby providing proper driving voltages for the SiC-based power switching device connected to the output terminal of the second motor driving circuit and the SiC-based power switching device connected to the output terminal of the PFC driving circuit, namely, the driving IC circuit of the intelligent power module of the invention can realize the purpose of providing proper driving voltage for the SiC-based power switch device and the Si-based power switch device at the same time, thereby meeting the requirements of simultaneously driving the Si-based power switch device and the SiC-based power switch device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a first embodiment of a driving IC circuit of an intelligent power module according to the present invention;

FIG. 2 is a schematic diagram of a second embodiment of a driving IC circuit of the smart power module according to the present invention;

FIG. 3 is a schematic structural diagram of a driving IC circuit of an intelligent power module according to a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first embodiment of an intelligent power module according to the present invention;

FIG. 5 is a schematic structural diagram of a second embodiment of an intelligent power module according to the invention;

fig. 6 is a schematic structural diagram of a third embodiment of the smart power module according to the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a driving IC circuit 100 of an intelligent power module for further improving the integration level of the intelligent power module and satisfying the requirement of simultaneously driving a Si-based power switching device and a SiC-based power switching device.

Fig. 1 is a schematic structural diagram of a first embodiment of a driving IC circuit of an intelligent power module according to the present invention, and referring to fig. 1, in this embodiment, the driving IC circuit 100 of the intelligent power module includes a driving voltage input terminal VCC, a first upper bridge control signal input terminal HIN1, a second upper bridge control signal input terminal HIN2, a third upper bridge control signal input terminal HIN3, a fourth upper bridge control signal input terminal HIN4, a fifth upper bridge control signal input terminal HIN5, a sixth upper bridge control signal input terminal HIN6, a first lower bridge control signal input terminal LIN1, a second lower bridge control signal input terminal LIN2, a third lower bridge control signal input terminal LIN3, a fourth lower bridge control signal input terminal LIN4, a fifth lower bridge control signal input terminal LIN5, a sixth lower bridge control signal input terminal LIN6, a PFC control signal input terminal PFCIN, a first motor driving circuit 101, a second motor driving circuit 102, a PFC driving circuit 103, and a boosting circuit 104.

The first motor driving circuit 101 is configured to drive an upper bridge arm switching tube (not shown) corresponding to an external first motor (not shown) to operate according to control signals input by the first upper bridge control signal input terminal HIN1, the second upper bridge control signal input terminal HIN2, and the third upper bridge control signal input terminal HIN 3; driving a lower bridge arm switching tube (not shown) corresponding to an external first motor to work according to the control signals input by the first lower bridge control signal input end LIN1, the second lower bridge control signal input end LIN2 and the third lower bridge control signal input end LIN 3;

the second motor driving circuit 102 is configured to drive an upper bridge arm switching tube (not shown) corresponding to an external second motor (not shown) to operate according to control signals input by the fourth upper bridge control signal input terminal HIN4, the fifth upper bridge control signal input terminal HIN5, and the sixth upper bridge control signal input terminal HIN 6; driving a lower bridge arm switching tube (not shown) corresponding to an external second motor to work according to the control signals input by the fourth lower bridge control signal input end LIN4, the fifth lower bridge control signal input end LIN5 and the sixth lower bridge control signal input end LIN 6;

the PFC driving circuit 103 is configured to drive an external PFC switching tube (not shown) to operate according to a control signal input by the PFC control signal input end PFCIN, and an output end of the PFC driving circuit 103 is PFCO;

the driving voltage input terminal VCC is configured to provide a driving input voltage for the first motor driving circuit 101, and provide an input voltage for the voltage boosting circuit 104;

the boost circuit 104 is configured to boost a voltage input by the driving voltage input terminal VCC, for example, when the voltage input by the driving voltage input terminal VCC is 15V, the boost circuit 104 boosts the 15V voltage to 18V to 20V, and provides driving input voltages for the second motor driving circuit 102 and the PFC driving circuit 103, so as to provide suitable driving voltages for a SiC-based power switching device (such as a SiC-based MOSFET transistor) connected to the output terminal of the second motor driving circuit 102 and a SiC-based power switching device (such as a SiC-based MOSFET transistor) connected to the output terminal of the PFC driving circuit 103. It can be understood that the 15V voltage inputted from the driving voltage input terminal VCC can be directly used to drive the operation of the Si-based power switch device (e.g., Si-based IGBT tube) connected to the output terminal of the first motor driving circuit 101.

In this embodiment, the upper bridge arm switching tubes corresponding to the external first motor include 3 switching tubes (not shown), so the upper bridge output end of the first motor driving circuit 101 includes a first upper bridge output end HO1, a second upper bridge output end HO2, and a third upper bridge output end HO 3; the lower bridge arm switching tubes corresponding to the external first motor also include 3 switching tubes (not shown), so that the lower bridge output ends of the first motor driving circuit 101 include a first lower bridge output end LO1, a second lower bridge output end LO2, and a third lower bridge output end LO 3;

the upper bridge arm switching tubes corresponding to the external second motor include 3 switching tubes (not shown), so the upper bridge output ends of the second motor driving circuit 102 include a first upper bridge output end HO4, a second upper bridge output end HO5 and a third upper bridge output end HO 6; the lower bridge arm switching tubes corresponding to the external second motor also include 3 switching tubes (not shown), and therefore, the lower bridge output ends of the second motor driving circuit 102 include a first lower bridge output end LO4, a second lower bridge output end LO5, and a third lower bridge output end LO 6.

In this embodiment, the input terminal of the first motor driving circuit 101 includes a first upper bridge input terminal, a second upper bridge input terminal, a third upper bridge input terminal, a first lower bridge input terminal, a second lower bridge input terminal, and a third lower bridge input terminal. A first upper bridge input end of the first motor driving circuit 101 is connected to the first upper bridge control signal input end HIN1, a second upper bridge input end of the first motor driving circuit 101 is connected to the second upper bridge control signal input end HIN2, and a third upper bridge input end of the first motor driving circuit 101 is connected to the third upper bridge control signal input end HIN 3; a first lower bridge input end of the first motor driving circuit 101 is connected with the first upper bridge control signal input end LIN1, a second lower bridge input end of the first motor driving circuit 101 is connected with the second upper and lower bridge control signal input end LIN2, and a third lower bridge input end of the first motor driving circuit 101 is connected with the third lower bridge control signal input end LIN 3.

The first upper bridge output end HO1, the second upper bridge output end HO2 and the third upper bridge output end HO3 of the first motor driving circuit 101 are respectively connected with the control ends of 3 upper bridge arm switching tubes corresponding to the external first motor in a one-to-one correspondence manner, and the first lower bridge output end LO1, the second lower bridge output end LO2 and the third lower bridge output end LO3 of the first motor driving circuit 101 are respectively connected with the control ends of 3 lower bridge arm switching tubes corresponding to the external first motor in a one-to-one correspondence manner.

In this embodiment, the input terminals of the second motor driving circuit 102 include a fourth upper bridge input terminal, a fifth upper bridge input terminal, a sixth upper bridge input terminal, a fourth lower bridge input terminal, a fifth lower bridge input terminal, and a sixth lower bridge input terminal. A fourth upper bridge input end of the second motor driving circuit 102 is connected to the fourth upper bridge control signal input end HIN4, a fifth upper bridge input end of the second motor driving circuit 102 is connected to the fifth upper bridge control signal input end HIN5, and a sixth upper bridge input end of the second motor driving circuit 102 is connected to the sixth upper bridge control signal input end HIN 6; a fourth lower bridge input end of the second motor driving circuit 102 is connected to the fourth lower bridge control signal input end LIN4, a fifth lower bridge input end of the second motor driving circuit 102 is connected to the fifth lower bridge control signal input end LIN5, and a sixth lower bridge input end of the second motor driving circuit 102 is connected to the sixth lower bridge control signal input end LIN 6.

The first upper bridge output end HO4, the second upper bridge output end HO5 and the third upper bridge output end HO6 of the second motor driving circuit 102 are respectively connected with the control ends of 3 upper bridge arm switching tubes corresponding to the external second motor in a one-to-one correspondence manner, and the first lower bridge output end LO4, the second lower bridge output end LO5 and the third lower bridge output end LO6 of the second motor driving circuit 102 are respectively connected with the control ends of 3 lower bridge arm switching tubes corresponding to the external second motor in a one-to-one correspondence manner.

In this embodiment, the input end of the PFC driving circuit 103 is connected to the PFC control signal input end PFCIN, and the output end of the PFC driving circuit 103 is connected to the control end of the PFC switching tube (not shown);

in this embodiment, the input terminal of the boost circuit 104 is connected to the driving voltage input terminal VCC, and the output terminal of the boost circuit 104 is connected to the driving voltage input terminal of the second motor driving circuit 102 and the driving voltage input terminal of the PFC driving circuit 103, respectively.

Further, the driving IC circuit 100 of the intelligent power module of this embodiment further includes a first under-voltage protection circuit 105, where the first under-voltage protection circuit 105 is configured to perform under-voltage protection on the output terminal of the voltage boost circuit 104, so as to ensure that the voltage at the output terminal of the voltage boost circuit 104 is kept at a stable voltage, for example, the voltage at the output terminal of the voltage boost circuit 104 is kept at 18V-20V.

In this embodiment, an input end of the first under-voltage protection circuit 105 is connected to an output end of the boost circuit 104, and an output end of the first under-voltage protection circuit 105 is connected to the second motor driving circuit 102 and the PFC driving circuit 103, respectively.

Further, the driving IC circuit 100 of the intelligent power module of the present embodiment further includes an enable terminal EN, an error signal output terminal FAULT, a reset terminal RS, a protection circuit 106, an error determination logic circuit 107, and a driving logic circuit 108. The driving IC circuit 100 of the intelligent power module of this embodiment further includes a reset terminal RS, and the present embodiment resets when the reset terminal RS inputs a reset signal.

Specifically, the protection circuit 106 is configured to output an under-voltage protection signal to the error determination logic circuit 107 when the driving voltage input terminal VCC is under-voltage, output an over-current protection signal to the error determination logic circuit 107 when any one of the switching tubes is over-current, and output an over-temperature protection signal to the error determination logic circuit 107 when the intelligent power module is over-temperature;

the error judgment logic circuit 107 is configured to output an error signal to the error signal output terminal futal when receiving the under-voltage protection signal, the over-current protection signal, or/and the over-temperature protection signal;

the driving logic circuit 108 is configured to output a start signal to the first motor driving circuit 101, the second motor driving circuit 102, and the PFC driving circuit 103 when the error determination logic circuit 107 does not output the error signal and the enable terminal EN inputs an enable signal, so as to control the first motor driving circuit 101, the second motor driving circuit 102, and the PFC driving circuit 103 to start operating.

In this embodiment, the input end of the protection circuit 106 is connected to the driving voltage input end VCC, the current output end of each lower bridge arm switching tube, and an external temperature detection circuit (not shown), the output end of the protection circuit 106 is connected to the input end of the error determination logic circuit 107, the output end of the error determination logic circuit 107 is connected to the error signal output end FAULT, the input end of the driving logic circuit 108 is connected to the enable end EN and the error determination logic circuit 107, and the output end of the driving logic circuit 108 is connected to the first motor driving circuit 101, the second motor driving circuit 102, and the PFC driving circuit 103.

Further, in this embodiment, the protection circuit 106 includes a second under-voltage protection circuit 1061, an over-current protection circuit 1062, and an over-temperature protection circuit 1063.

The second undervoltage protection circuit 1061 is configured to output an undervoltage protection signal to the error determination logic circuit 107 when the driving voltage input terminal VCC of the driving IC circuit 100 of the intelligent power module of this embodiment is undervoltage;

the overcurrent protection circuit 1062 is configured to output an overcurrent protection signal to the error determination logic circuit 107 when any one of the switching tubes is in an overcurrent state;

the over-temperature protection circuit 1063 is configured to output an over-temperature protection signal to the error determination logic circuit 107 when the intelligent power module is over-temperature.

In this embodiment, an input end of the second under-voltage protection circuit 1061 is connected to the driving voltage input end VCC, an input end of the over-current protection circuit 1062 is connected to a current output end of each lower bridge arm switching tube, an input end of the over-temperature protection circuit 1063 is connected to the external temperature detection circuit, and an output end of the second under-voltage protection circuit 1061, an output end of the over-current protection circuit 1062, and an output end of the over-temperature protection circuit 1063 are connected to an input end of the error determination logic circuit 107.

The driving IC circuit 100 of the intelligent power module of this embodiment integrates the first motor driving circuit 101 for driving the upper arm switching tube and the lower arm switching tube corresponding to the external first motor to operate, the second motor driving circuit 102 for driving the upper arm switching tube and the lower arm switching tube corresponding to the external second motor to operate, and the PFC driving circuit 103 for driving the external PFC switching tube to operate in the same IC chip, so that the driving IC circuit 100 of the intelligent power module of this embodiment further improves the integration level of the intelligent power module, thereby reducing the cost of the intelligent power module and improving the reliability of the intelligent power module at the same time, compared with the driving IC circuit of the intelligent power module in the prior art; moreover, the driving IC circuit 100 of the intelligent power module of this embodiment is further provided with the boost circuit 104, and the boost circuit 104 can boost the voltage input by the driving voltage input terminal VCC in the driving IC circuit 100 of the intelligent power module of this embodiment (for example, boost the voltage of 15V to 18V-20V), and provide the driving input voltage for the second motor driving circuit 102 and the PFC driving circuit 103, so as to provide the suitable driving voltage for the SiC-based power switching device (for example, SiC-based MOSFET tube) connected to the output terminal of the second motor driving circuit 102 and the SiC-based power switching device (for example, SiC-based MOSFET tube) connected to the output terminal of the PFC driving circuit 103, that is, the driving IC circuit 100 of the intelligent power module of this embodiment can provide the suitable driving voltage for the SiC-based power switching device (for example, SiC-based MOSFET tube) and the Si-based power switching device (for example, Si-based IGBT tube) in the intelligent power module at the same time The purpose is to meet the requirement of simultaneously driving the Si-based power switch device and the SiC-based power switch device.

Fig. 2 is a schematic structural diagram of a second embodiment of a driving IC circuit of an intelligent power module according to the present invention, and referring to fig. 2 and fig. 1 together, a driving IC circuit 200 of the intelligent power module of the present embodiment differs from the driving IC circuit 100 of the intelligent power module in the first embodiment as follows:

the driving IC circuit 200 of the intelligent power module of this embodiment is provided with a step-down circuit 104 ' (the driving IC circuit 100 of the intelligent power module in the first embodiment is provided with a step-up circuit 104), the driving voltage input terminal VCC in the driving IC circuit 200 of the intelligent power module of this embodiment is used for providing driving input voltage for the second motor driving circuit 102 and the PFC driving circuit 103, and the driving voltage input terminal VCC is also used for providing input voltage for the step-down circuit 104 ', the step-down circuit 104 ' in this embodiment is used for performing step-down processing on the voltage input by the driving voltage input terminal VCC, for example, the 18V-20V voltage input by the driving voltage input terminal VCC is stepped down to 15V voltage, so as to provide driving input voltage for the first motor driving circuit 101, and further provide suitable driving for a Si-based power switching device (such as a Si-based IGBT tube) connected to the output terminal of the first motor driving circuit 101 A voltage. It can be understood that if the voltage input by the driving voltage input terminal VCC is 18V-20V, the voltage of 18V-20V can be directly used for driving the operation of the SiC-based power switching device (such as SiC-based MOSFET transistor).

In this embodiment, the input terminal of the voltage-reducing circuit 104 'is connected to the driving voltage input terminal VCC, and the output terminal of the voltage-reducing circuit 104' is connected to the driving voltage input terminal of the first motor driving circuit 101. The driving IC circuit 200 of the intelligent power module of this embodiment further includes a third undervoltage protection circuit 105 ' for undervoltage protection of the output terminal of the voltage-reducing circuit 104 ', an input terminal of the third undervoltage protection circuit 105 ' is connected to the output terminal of the voltage-reducing circuit 104 ', and an output terminal of the third undervoltage protection circuit 105 ' is connected to the first motor driving circuit 101.

The connection structure of other circuits in the driving IC circuit 200 of the intelligent power module of this embodiment is the same as that of the first embodiment, and is not described herein again.

The driving IC circuit 200 of the intelligent power module of this embodiment integrates the first motor driving circuit 101 for driving the upper bridge arm switching tube and the lower bridge arm switching tube corresponding to the external first motor to operate, the second motor driving circuit 102 for driving the upper bridge arm switching tube and the lower bridge arm switching tube corresponding to the external second motor to operate, and the PFC driving circuit 103 for driving the external PFC switching tube to operate in the same IC chip, so that the driving IC circuit 200 of the intelligent power module of this embodiment further improves the integration level of the intelligent power module, thereby reducing the cost of the intelligent power module and improving the reliability of the intelligent power module at the same time, compared with the driving IC circuit of the intelligent power module in the prior art; similarly, the driving IC circuit 200 of the intelligent power module of this embodiment can achieve the purpose of providing suitable driving voltage for the SiC-based power switch device (such as a SiC-based MOSFET transistor) and the Si-based power switch device (such as a Si-based IGBT transistor) in the intelligent power module at the same time, thereby meeting the requirement of driving the Si-based power switch device and the SiC-based power switch device at the same time.

Fig. 3 is a schematic structural diagram of a driving IC circuit of an intelligent power module according to a third embodiment of the present invention, and referring to fig. 3 and fig. 1 together, a driving IC circuit 300 of the intelligent power module of this embodiment differs from the driving IC circuit 100 of the intelligent power module in the first embodiment as follows:

the driving voltage input terminal VCC in the driving IC circuit 300 of the smart power module of this embodiment is used for providing a driving input voltage for the first motor driving circuit 101 and the second motor driving circuit 102, and the voltage boosting circuit 104 in this embodiment is used for performing a voltage boosting process on the voltage input by the driving voltage input terminal VCC, so as to provide a driving input voltage for the PFC driving circuit 103. In this embodiment, the input terminal of the boost circuit 104 is connected to the driving voltage input terminal VCC, and the output terminal of the boost circuit 104 is connected to the driving voltage input terminal of the PFC driving circuit 103.

The input end of the first under-voltage protection circuit 105 in the driving IC circuit 300 of the intelligent power module of this embodiment is connected to the output end of the boost circuit 104, and the output end of the first under-voltage protection circuit 105 is connected to the PFC driving circuit 103.

The boost circuit 104 in this embodiment is configured to perform boost processing on the voltage at the driving voltage input terminal VCC, for example, step down the 15V voltage input by the driving voltage input terminal VCC to 18V-20V voltage, so as to provide a driving input voltage for the PFC driving circuit 103, and further provide a suitable driving voltage for a SiC-based power switching device (such as a SiC-based MOSFET tube) connected to the output terminal of the PFC driving circuit 103. It can be understood that, as the voltage input by the driving voltage input terminal VCC in this embodiment is 15V, the 15V voltage can be directly used for driving the Si-based power switching device (e.g., Si-based IGBT tube) to operate.

The connection structure of other circuits in the driving IC circuit 300 of the intelligent power module of this embodiment is the same as that of the first embodiment, and is not described herein again.

In the driving IC circuit 300 of the intelligent power module of this embodiment, the first motor driving circuit 101 for driving the upper arm switching tube and the lower arm switching tube corresponding to the external first motor to operate, the second motor driving circuit 102 for driving the upper arm switching tube and the lower arm switching tube corresponding to the external second motor to operate, and the PFC driving circuit 103 for driving the external PFC switching tube to operate are all integrated in the same IC chip, so that the driving IC circuit 300 of the intelligent power module of this embodiment further improves the integration level of the intelligent power module, compared with the driving IC circuit of the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module and improving the reliability of the intelligent power module; similarly, the driving IC circuit 300 of the intelligent power module of this embodiment can achieve the purpose of providing suitable driving voltage for the SiC-based power switch device (such as a SiC-based MOSFET transistor) and the Si-based power switch device (such as a Si-based IGBT transistor) in the intelligent power module at the same time, thereby meeting the requirement of driving the Si-based power switch device and the SiC-based power switch device at the same time.

The invention further provides an intelligent power module, fig. 4 is a schematic structural diagram of a first embodiment of the intelligent power module of the invention, and referring to fig. 4 and fig. 1 together, the intelligent power module 400 includes a PFC switch tube Q5, a plurality of resistors (such as a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R8), a first upper bridge arm switch tube Q1, a second upper bridge arm switch tube (not shown), a third upper bridge arm switch tube (not shown), a first lower bridge arm switch tube Q2, a second lower bridge arm switch tube (not shown), a third lower bridge arm switch tube (not shown), a fourth upper bridge arm switch tube Q3, a fifth upper bridge arm switch tube (not shown), a sixth upper bridge arm switch tube (not shown), a fourth lower bridge arm switch tube Q4, a fifth lower bridge arm switch tube (not shown), and a sixth upper bridge arm switch tube (not shown), And the driving IC circuit 100 of the smart power module as described above (i.e., the driving IC circuit 100 of the smart power module shown in fig. 1).

Specifically, in this embodiment, the first upper bridge output terminal HO1 of the first motor driving circuit 101 in the driving IC circuit 100 is connected to the control terminal of the first upper bridge arm switching transistor Q1 through the resistor R1, the second upper bridge output terminal HO2 of the first motor driving circuit 101 is connected to the control terminal of the second upper bridge arm switching transistor (not shown) through a resistor (not shown), and the third upper bridge output terminal HO3 of the first motor driving circuit 101 is connected to the control terminal of the third upper bridge arm switching transistor (not shown) through a resistor (not shown); a first lower bridge output end LO1 of the first motor driving circuit 101 is connected to a control end of the first lower bridge arm switching tube Q2 through a resistor R2, a second lower bridge output end LO2 of the first motor driving circuit 101 is connected to a control end of the second lower bridge arm switching tube (not shown) through a resistor (not shown), and a third lower bridge output end LO3 of the first motor driving circuit 101 is connected to a control end of the third lower bridge arm switching tube (not shown) through a resistor (not shown);

a first upper bridge output terminal HO4 of a second motor driving circuit 102 in the driving IC circuit 100 is connected to a control terminal of the fourth upper bridge arm switching transistor Q3 through a resistor R3, a second upper bridge output terminal HO5 of the second motor driving circuit 102 is connected to a control terminal of the fifth upper bridge arm switching transistor (not shown) through a resistor (not shown), and a third upper bridge output terminal HO6 of the second motor driving circuit 102 is connected to a control terminal of the sixth upper bridge arm switching transistor (not shown) through a resistor (not shown); a first lower bridge output terminal LO4 of the second motor driving circuit 102 is connected to a control terminal of the fourth lower bridge arm switching transistor Q4 through a resistor R4, a second lower bridge output terminal LO5 of the second motor driving circuit 102 is connected to a control terminal of the fifth lower bridge arm switching transistor (not shown) through a resistor (not shown), and a third lower bridge output terminal LO6 of the second motor driving circuit 102 is connected to a control terminal of the sixth lower bridge arm switching transistor (not shown) through a resistor (not shown); in this embodiment, the output end PFCO of the PFC driving circuit 103 in the driving IC circuit 100 is connected to the control end of the PFC switching tube Q5 through a resistor R5.

In this embodiment, a voltage of the driving voltage input terminal VCC in the driving IC circuit 100 is 15V, the first upper arm switching tube Q1, the second upper arm switching tube (not shown), the third upper arm switching tube (not shown), the first lower arm switching tube Q2, the second lower arm switching tube (not shown), and the third lower arm switching tube (not shown) are Si-based IGBT tubes, and the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), the sixth lower arm switching tube (not shown), and the PFC switching tube Q5 are SiC-based MOSFET tubes. Specifically, in this embodiment, the fourth upper arm switch Q3, the fifth upper arm switch (not shown), the sixth upper arm switch (not shown), the fourth lower arm switch Q4, the fifth lower arm switch (not shown), the sixth lower arm switch (not shown), and the PFC switch Q5 are SiC-based NMOS transistors.

Further, the smart power module 400 of this embodiment further includes a first current sampling resistor R6, a second current sampling resistor R7, and a third current sampling resistor R8. A first end of the first current sampling resistor R6 is connected with a current output end of the PFC switching tube Q5, and a second end of the first current sampling resistor R6 is grounded; a first end of the second current sampling resistor R7 is connected to current output ends of the first lower arm switching tube Q2, the second lower arm switching tube (not shown), and the third lower arm switching tube (not shown), respectively, and a second end of the second current sampling resistor R7 is grounded; a first end of the third current sampling resistor R8 is connected to current output ends of the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), and the sixth lower arm switching tube (not shown), respectively, and a second end of the third current sampling resistor R8 is grounded. In this embodiment, the first end of the first current sampling resistor R6 is further connected to a first input end of the over-current protection circuit 1062 in the driver IC circuit 100, the first end of the second current sampling resistor R7 is further connected to a second input end of the over-current protection circuit 1062 in the driver IC circuit 100, and the first end of the third current sampling resistor R8 is further connected to a third input end of the over-current protection circuit 1062 in the driver IC circuit 100.

The smart power module 400 of this embodiment further includes a temperature detection circuit 10 for detecting the temperature of the smart power module 400 of this embodiment, and the temperature detection circuit 10 is connected to the input terminal of the over-temperature protection circuit 1063 in the driver IC circuit 100.

The intelligent power module 400 of this embodiment further includes a first high-voltage region power supply input terminal P1, a second high-voltage region power supply input terminal P2, a plurality of freewheeling diodes (such as freewheeling diode FRD1, freewheeling diode FRD2, freewheeling diode FRD3, freewheeling diode FRD4 and freewheeling diode FRD5), a PFC signal output terminal PFCOUT and a first diode D1. Specifically, in this embodiment, the collector of the first upper arm switching tube Q1, the collector of the second upper arm switching tube (not shown), the collector of the third upper arm switching tube (not shown), the collector of the fourth upper arm switching tube Q3, the collector of the fifth upper arm switching tube (not shown), and the collector of the sixth upper arm switching tube (not shown) are connected to the first high-voltage-region power supply input terminal P1, the emitter of the first upper arm switching tube Q1 is connected to the collector of the first lower arm switching tube Q2, the emitter of the second upper arm switching tube (not shown) is connected to the collector of the second lower arm switching tube (not shown), the emitter of the third upper arm switching tube (not shown) is connected to the collector of the third lower arm switching tube (not shown), the emitter of the fourth upper arm switching tube Q3 is connected to the collector of the fourth lower arm switching tube Q4, an emitter of the fifth upper bridge arm switching tube (not shown) is connected with a collector of the fifth lower bridge arm switching tube (not shown), and an emitter of the sixth upper bridge arm switching tube (not shown) is connected with a collector of the sixth lower bridge arm switching tube (not shown); an emitter of the first lower arm switching tube Q2, an emitter of the second lower arm switching tube (not shown), and an emitter of the third lower arm switching tube (not shown) are connected to a first end of the second current sampling resistor R7, and an emitter of the fourth lower arm switching tube Q4, an emitter of the fifth lower arm switching tube (not shown), and an emitter of the sixth lower arm switching tube (not shown) are connected to a first end of the third current sampling resistor R8; the collector of the PFC switch tube Q5 is connected to the PFC signal output terminal PFCOUT and the anode of the first diode D1, respectively, the cathode of the first diode D1 is connected to the second high-voltage-region power supply input terminal P2, and the emitter of the PFC switch tube Q5 is connected to the first end of the first current sampling resistor R6.

In this embodiment, the cathode of the freewheeling diode FRD1 is connected to the collector of the first upper arm switching tube Q1, the anode of the freewheeling diode FRD1 is connected to the emitter of the first upper arm switching tube Q1, the cathode of the freewheeling diode FRD2 is connected to the collector of the first lower arm switching tube Q2, the anode of the freewheeling diode FRD2 is connected to the emitter of the first lower arm switching tube Q2, the cathode of the freewheeling diode FRD3 is connected to the collector of the fourth upper arm switching tube Q3, the anode of the freewheeling diode FRD3 is connected to the emitter of the fourth upper arm switching tube Q3, the cathode of the freewheeling diode FRD4 is connected to the collector of the fourth lower arm switching tube Q4, the anode of the freewheeling diode FRD4 is connected to the emitter of the fourth lower arm switching tube Q4, the cathode of the freewheeling diode FRD5 is connected to the collector of the PFC switching tube Q5, and the anode of the diode FRD5 is connected to the emitter of the PFC switch 5. Similarly, a freewheeling diode (not shown) is connected between the collector and the emitter of each of the other switching tubes, and is not described herein again.

In this embodiment, a connection node between the first upper arm switching tube Q1 and the first lower arm switching tube Q2, a connection node between the second upper arm switching tube and the second lower arm switching tube, and a connection node between the third upper arm switching tube and the third lower arm switching tube are connected to an external first motor M1, and a connection node between the fourth upper arm switching tube Q3 and the fourth lower arm switching tube Q4, a connection node between the fifth upper arm switching tube and the fifth lower arm switching tube, and a connection node between the sixth upper arm switching tube and the sixth lower arm switching tube are connected to an external second motor M2. When the intelligent power module 200 of this embodiment is applied to an air conditioner (e.g., an inverter air conditioner), the first motor M1 may be a blower of the air conditioner, and the second motor M2 may be a compressor of the air conditioner.

Further, the smart power module 400 of this embodiment further includes a first bootstrap circuit (composed of the diode D2, the resistor R9, and the capacitor C1 in the figure), a second bootstrap circuit (not shown in the figure), a third bootstrap circuit (not shown in the figure), a fourth bootstrap circuit (composed of the diode D3, the resistor R10, and the capacitor C2 in the figure), a fifth bootstrap circuit (not shown in the figure), and a sixth bootstrap circuit (not shown in the figure).

Specifically, an anode of the diode D2 in the first bootstrap circuit is a first end in the first bootstrap circuit, the first end in the first bootstrap circuit is connected to the driving voltage input terminal VCC of the driving IC circuit 100, a cathode of the diode D2 is connected to an upper bridge floating power supply voltage terminal VB4 of the driving IC circuit 100 through a resistor R9, the upper bridge floating power supply voltage terminal VB4 is connected to a first end of a capacitor C1, a second end of the capacitor C1 is a second end in the first bootstrap circuit, the second end in the first bootstrap circuit is connected to an emitter of the first upper bridge arm switch Q1 and a collector of the first lower bridge arm switch Q2, and the second end of the capacitor C1 is further connected to an upper bridge floating power supply offset voltage terminal VS1 of the driving IC circuit 100.

A first end of the second bootstrap circuit (not shown in the figure) is connected to the driving voltage input terminal VCC of the driving IC circuit, and a second end of the second bootstrap circuit is connected to an emitter of the second upper bridge arm switching tube (not shown in the figure) and a collector of the second lower bridge arm switching tube (not shown in the figure);

a first end of the third bootstrap circuit (not shown in the figure) is connected to the driving voltage input terminal VCC of the driving IC circuit, and a second end of the third bootstrap circuit is connected to an emitter of the third upper bridge arm switching tube (not shown in the figure) and a collector of the third lower bridge arm switching tube (not shown in the figure);

an anode of the diode D3 in the fourth self-lifting circuit is a first end in the fourth self-lifting circuit, the first end in the fourth self-lifting circuit is connected to the driving voltage input terminal VCC of the driving IC circuit 100, a cathode of the diode D3 is connected to an upper bridge floating power supply voltage terminal VB1 of the driving IC circuit 100 through a resistor R10, the upper bridge floating power supply voltage terminal VB1 is connected to a first end of a capacitor C2, a second end of the capacitor C2 is a second end in the fourth self-lifting circuit, the second end in the fourth self-lifting circuit is connected to an emitter of the fourth upper bridge arm switch Q3 and a collector of the fourth lower bridge arm switch Q4, and the second end of the capacitor C2 is further connected to an upper bridge floating power supply offset voltage terminal VS4 of the driving IC circuit 100.

A first end of the fifth bootstrap circuit (not shown in the figure) is connected to the driving voltage input terminal VCC of the driving IC circuit, and a second end of the fifth bootstrap circuit is connected to an emitter of the fifth upper bridge arm switching tube (not shown in the figure) and a collector of the fifth lower bridge arm switching tube (not shown in the figure);

a first end of the sixth bootstrap circuit (not shown in the figure) is connected to the driving voltage input terminal VCC of the driving IC circuit, and a second end of the sixth bootstrap circuit is connected to an emitter of the sixth upper bridge arm switching tube (not shown in the figure) and a collector of the sixth lower bridge arm switching tube (not shown in the figure).

In the intelligent power module 400 of this embodiment, the driving IC circuit 100 in the intelligent power module integrates the first motor driving circuit 101, the second motor driving circuit 102 and the PFC driving circuit 103 in the same IC chip, so that the intelligent power module 400 of this embodiment further improves the integration level of the intelligent power module compared with the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module. In addition, the intelligent power module 400 of this embodiment shares a set of protection circuit 106 with the external first motor M1, the external second motor M2 and the PFC switch tube Q5, specifically, in this embodiment, when the driving voltage input terminal VCC of the driving IC circuit 100 is under-voltage, the second under-voltage protection circuit 1061 in the protection circuit 106 outputs an under-voltage protection signal to the error determination logic circuit 107, in this embodiment, when any one of the switch tubes is over-current, the over-current protection circuit 1062 in the protection circuit 106 outputs an over-current protection signal to the error determination logic circuit 107, when the temperature of the intelligent power module 400 of this embodiment is too high, the over-temperature protection circuit 1063 in the protection circuit 106 outputs an over-temperature protection signal to the error determination logic circuit 107, and the error determination logic circuit 107 receives the under-voltage protection signal, When the overcurrent protection signal or/and the overtemperature protection signal is/are detected, an error signal is output to the error signal output terminal FUALT, the error signal output terminal FUALT is connected with an external controller (not shown), and when the external controller receives the error signal, the external controller outputs a corresponding control signal to the drive IC circuit 100 to control the first motor drive circuit 101, the second motor drive circuit 102 and the PFC drive circuit 103 to stop working, so as to control the first motor M1, the second motor M2 and the PFC switch tube Q5 to stop working. The present embodiment can effectively prevent one of the discrete devices from failing to cause the other modules to continue to operate, so as to better protect the intelligent power module 400 of the present embodiment and improve the reliability of the intelligent power module 400.

To sum up, the intelligent power module 400 of this embodiment adopts the highly integrated driver IC circuit 100, and the intelligent power module 400 of this embodiment shares one set of protection circuit 106, so as to simplify the internal structure of the highly integrated intelligent power module (also called highly integrated IPM), greatly improve the integration level and reliability of the intelligent power module, and reduce the cost and volume; the intelligent power module 400 of this embodiment also reduces the internal wiring difficulty of the intelligent power module. The intelligent power module 400 of the embodiment has the advantages of simple and reasonable structure, flexible operation, low cost, high integration level, high reliability and wide application range.

In addition, the intelligent power module 400 of this embodiment is suitable for a case where the voltage of the driving voltage input terminal VCC in the driving IC circuit 100 is 15V, the first upper arm switching tube Q1, the second upper arm switching tube (not shown), the third upper arm switching tube (not shown), the first lower arm switching tube Q2, the second lower arm switching tube (not shown), and the third lower arm switching tube (not shown) are Si-based tubes, and the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), the sixth lower arm switching tube (not shown), and the PFC switching tube Q5 are SiC-based MOSFET tubes. Specifically, when the voltage at the driving voltage input terminal VCC in the driving IC circuit 100 is 15V, the voltage boost circuit 104 can perform a voltage boost process on the 15V voltage at the driving voltage input terminal VCC, and boost the 15V voltage to 18V-20V voltage, so that the second motor driving circuit 102 and the PFC driving circuit 103 are suitable for driving the SiC-based MOSFET.

In the intelligent power module 400 of this embodiment, since the driving IC circuit 100 is provided with the boost circuit 104, the boost circuit 104 can boost the 15V voltage input by the driving voltage input terminal VCC, boost the 15V voltage to 18V-20V voltage, and provide driving input voltage for the second motor driving circuit 102 and the PFC driving circuit 103, so as to provide suitable driving voltage for the SiC-based MOSFET connected to the output terminal of the second motor driving circuit 102 and the SiC-based MOSFET connected to the output terminal of the PFC driving circuit 103, and the 15V voltage input by the driving voltage input terminal VCC can be directly used for driving the Si-based IGBT, that is, the intelligent power module 400 of this embodiment can achieve the purpose of providing suitable driving voltage for the SiC-based power switching device and the Si-based power switching device at the same time, thereby meeting the requirements of simultaneously driving the Si-based power switch device and the SiC-based power switch device.

Fig. 5 is a schematic structural diagram of an intelligent power module according to a second embodiment of the present invention, and referring to fig. 5, fig. 2 and fig. 4 together, a difference between the intelligent power module 500 of this embodiment and the intelligent power module 400 of the first embodiment is as follows:

the driving IC circuit in the intelligent power module 500 of this embodiment is the driving IC circuit 200 of the intelligent power module shown in fig. 2, the voltage of the driving voltage input terminal VCC in this embodiment is 18V-20V, the first upper arm switch Q1, the second upper arm switch (not shown), the third upper arm switch (not shown), the first lower arm switch Q2, the second lower arm switch (not shown), and the third lower arm switch (not shown) in this embodiment are Si-based IGBT tubes, the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), the sixth lower arm switching tube (not shown), and the PFC switching tube Q5 are SiC-based MOSFET tubes. That is, the intelligent power module 500 of this embodiment is suitable for a case where the voltage at the driving voltage input terminal VCC in the driving IC circuit 100 is 18V to 20V, the first upper arm switching tube Q1, the second upper arm switching tube (not shown), the third upper arm switching tube (not shown), the first lower arm switching tube Q2, the second lower arm switching tube (not shown), and the third lower arm switching tube (not shown) are Si-based IGBT tubes, and the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), the sixth lower arm switching tube (not shown), and the PFC switching tube Q5 are based SiC MOSFET tubes.

The circuit connection structure of other components in the intelligent power module 500 of this embodiment is the same as the intelligent power module 400 in the first embodiment, and is not described herein again.

The intelligent power module 500 of this embodiment adopts the highly integrated driving IC circuit 200, so that the internal structure of the highly integrated intelligent power module (also called as highly integrated IPM) is simplified, the integration level and reliability of the intelligent power module are greatly improved, the cost is reduced, and the size is reduced; the intelligent power module 500 of the present embodiment also reduces the difficulty of internal wiring of the intelligent power module. The intelligent power module 500 of the embodiment has the advantages of simple and reasonable structure, flexible operation, low cost, high integration level, high reliability and wide application range. Also, since the driving IC circuit 200 of the smart power module 500 of the present embodiment is provided with the step-down circuit 104', the step-down circuit 104' can perform step-down processing on the 18V-20V voltage input by the driving voltage input terminal VCC, step down the 18V-20V voltage to 15V voltage, provide driving input voltage for the first motor driving circuit 101, thereby providing a proper driving voltage for the Si-based IGBT tube connected to the output terminal of the first motor driving circuit 101, the 18V-20V voltage input by the driving voltage input terminal VCC can be directly used for driving the operation of the SiC-based MOSFET, that is, the smart power module 500 of this embodiment can also achieve the purpose of providing suitable driving voltages for the SiC-based power switching device and the Si-based power switching device at the same time, thereby meeting the requirements of simultaneously driving the Si-based power switch device and the SiC-based power switch device.

Fig. 6 is a schematic structural diagram of an intelligent power module according to a third embodiment of the present invention, and referring to fig. 6, fig. 3 and fig. 4 together, the difference between the intelligent power module 600 of this embodiment and the intelligent power module 400 of the first embodiment is as follows:

the driving IC circuit in the intelligent power module 600 of this embodiment is the driving IC circuit 300 of the intelligent power module shown in fig. 3, the voltage of the driving voltage input terminal VCC in this embodiment is 15V, the first upper arm switching tube Q1, the second upper arm switching tube (not shown), the third upper arm switching tube (not shown), the first lower arm switching tube Q2, the second lower arm switching tube (not shown), and the third lower arm switching tube (not shown) in this embodiment, the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), and the sixth lower arm switching tube (not shown) are Si-based IGBT tubes, and the PFC switching tube Q5 is a SiC-based MOSFET tube. That is, the intelligent power module 600 of this embodiment is suitable for a case where the voltage of the driving voltage input terminal VCC is 15V, and the first upper arm switching tube Q1, the second upper arm switching tube (not shown), the third upper arm switching tube (not shown), the first lower arm switching tube Q2, the second lower arm switching tube (not shown), the third lower arm switching tube (not shown), the fourth upper arm switching tube Q3, the fifth upper arm switching tube (not shown), the sixth upper arm switching tube (not shown), the fourth lower arm switching tube Q4, the fifth lower arm switching tube (not shown), and the sixth lower arm switching tube (not shown) are Si-based IGBT tubes, and the PFC switching tube Q5 is a SiC-based MOSFET tube.

The intelligent power module 600 of this embodiment adopts the highly integrated driving IC circuit 300, so that the internal structure of the highly integrated intelligent power module (also called as highly integrated IPM) is simplified, the integration level and reliability of the intelligent power module are greatly improved, the cost is reduced, and the size is reduced; the intelligent power module 600 of the present embodiment also reduces the difficulty of internal wiring of the intelligent power module. The intelligent power module 600 of the embodiment has the advantages of simple and reasonable structure, flexible operation, low cost, high integration level, high reliability and wide application range. In addition, in the intelligent power module 600 of this embodiment, the driving IC circuit 300 is provided with the boost circuit 104, the boost circuit 104 can boost the 15V voltage input by the driving voltage input terminal VCC, boost the 15V voltage to 18V-20V voltage, and provide driving input voltage for the PFC driving circuit 103, so as to provide suitable driving voltage for the SiC-based MOSFET connected to the output terminal of the PFC driving circuit 103, and the 15V voltage input by the driving voltage input terminal VCC can be directly used for driving the Si-based IGBT to operate, that is, the intelligent power module 600 of this embodiment can also achieve the purpose of providing suitable driving voltage for the SiC-based power switching device and the Si-based power switching device at the same time, so as to meet the requirement of driving the Si-based power switching device and the SiC-based power switching device at the same time.

The present invention further provides an air conditioner, which includes an intelligent power module, and the structure of the intelligent power module can refer to the above embodiments, and is not described herein again. It should be understood that, since the air conditioner of the present embodiment adopts the technical solution of the intelligent power module, the air conditioner has all the beneficial effects of the intelligent power module.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A drive IC circuit of an intelligent power module is characterized by comprising a drive voltage input end, a plurality of upper bridge control signal input ends, a plurality of lower bridge control signal input ends, a PFC control signal input end, a first motor drive circuit, a second motor drive circuit, a PFC drive circuit and a booster circuit; wherein:

2. The driving IC circuit of claim 1, wherein the input terminal of the first motor driving circuit is connected to a corresponding upper bridge control signal input terminal of the plurality of upper bridge control signal input terminals and a corresponding lower bridge control signal input terminal of the plurality of lower bridge control signal input terminals, and the output terminal of the first motor driving circuit is connected to the control terminal of the upper bridge arm switch tube corresponding to the external first motor and the control terminal of the lower bridge arm switch tube corresponding to the external first motor;

3. The driver IC circuit of claim 2, further comprising a first under-voltage protection circuit for under-voltage protecting an output terminal of the boost circuit, wherein an input terminal of the first under-voltage protection circuit is connected to an output terminal of the boost circuit, and an output terminal of the first under-voltage protection circuit is connected to the second motor driver circuit and the PFC driver circuit, respectively.

4. The driver IC circuit of an intelligent power module according to any one of claims 1 to 3, wherein the driver IC circuit further comprises an enable terminal, an error signal output terminal, a protection circuit, an error judgment logic circuit, and a driver logic circuit; wherein:

5. The driver IC circuit of an intelligent power module according to claim 4, wherein the protection circuit includes a second undervoltage protection circuit, an overcurrent protection circuit, and an overtemperature protection circuit; wherein:

6. A drive IC circuit of an intelligent power module is characterized by comprising a drive voltage input end, a plurality of upper bridge control signal input ends, a plurality of lower bridge control signal input ends, a PFC control signal input end, a first motor drive circuit, a second motor drive circuit, a PFC drive circuit and a voltage reduction circuit; wherein:

7. The driving IC circuit of claim 6, wherein the input terminal of the first motor driving circuit is connected to a corresponding upper bridge control signal input terminal of the plurality of upper bridge control signal input terminals and a corresponding lower bridge control signal input terminal of the plurality of lower bridge control signal input terminals, and the output terminal of the first motor driving circuit is connected to the control terminal of the upper bridge arm switch tube corresponding to the external first motor and the control terminal of the lower bridge arm switch tube corresponding to the external first motor;

8. The driver IC circuit of claim 7, further comprising a third undervoltage protection circuit for undervoltage protecting an output terminal of the voltage step-down circuit, wherein an input terminal of the third undervoltage protection circuit is connected to an output terminal of the voltage step-down circuit, and an output terminal of the third undervoltage protection circuit is connected to the first motor driver circuit.

9. A drive IC circuit of an intelligent power module is characterized by comprising a drive voltage input end, a plurality of upper bridge control signal input ends, a plurality of lower bridge control signal input ends, a PFC control signal input end, a first motor drive circuit, a second motor drive circuit, a PFC drive circuit and a booster circuit; wherein:

10. The driving IC circuit of claim 9, wherein the input terminal of the first motor driving circuit is connected to a corresponding upper bridge control signal input terminal of the plurality of upper bridge control signal input terminals and a corresponding lower bridge control signal input terminal of the plurality of lower bridge control signal input terminals, and the output terminal of the first motor driving circuit is connected to the control terminal of the upper bridge arm switch tube corresponding to the external first motor and the control terminal of the lower bridge arm switch tube corresponding to the external first motor;

11. The driver IC circuit of claim 10, further comprising a first under-voltage protection circuit for under-voltage protecting an output of the boost circuit, wherein an input of the first under-voltage protection circuit is connected to an output of the boost circuit, and an output of the first under-voltage protection circuit is connected to the PFC driver circuit.

12. An intelligent power module is characterized by comprising a PFC (power factor correction) switching tube, 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 and a third lower bridge arm switching tube which correspond to an external first motor, a fourth upper bridge arm switching tube, a fifth upper bridge arm switching tube, a sixth upper bridge arm switching tube, a fourth lower bridge arm switching tube, a fifth lower bridge arm switching tube and a sixth lower bridge arm switching tube which correspond to an external second motor, and a driving IC (integrated circuit) circuit of the intelligent power module, wherein the driving IC circuit comprises 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; wherein:

13. The smart power module of claim 12 further comprising a first current sampling resistor, a second current sampling resistor, and a third current sampling resistor; wherein:

14. The smart power module as claimed in claim 13, further comprising a temperature detection circuit for detecting a temperature of the smart power module, the temperature detection circuit being connected to an input terminal of the over-temperature protection circuit in the driver IC circuit.

15. The smart power module according to any one of claims 12 to 14, wherein 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, and the third lower bridge arm switching tube are Si-based IGBT tubes, and the fourth upper bridge arm switching tube, the fifth upper bridge arm switching tube, the sixth upper bridge arm switching tube, the fourth lower bridge arm switching tube, the fifth lower bridge arm switching tube, the sixth lower bridge arm switching tube, and the PFC switching tube are SiC-based MOSFET tubes.

16. The smart power module of claim 15 further comprising a first high-voltage area supply input, a second high-voltage area supply input, a plurality of freewheeling diodes, a PFC signal output, and a first diode; wherein:

17. The smart power module of claim 16 further comprising a first bootstrap circuit, a second bootstrap circuit, a third bootstrap circuit, a fourth bootstrap circuit, a fifth bootstrap circuit, and a sixth bootstrap circuit; wherein:

18. An intelligent power module is characterized by comprising a PFC (power factor correction) switching tube, 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 and a third lower bridge arm switching tube which correspond to an external first motor, a fourth upper bridge arm switching tube, a fifth upper bridge arm switching tube, a sixth upper bridge arm switching tube, a fourth lower bridge arm switching tube, a fifth lower bridge arm switching tube and a sixth lower bridge arm switching tube which correspond to an external second motor, and a driving IC (integrated circuit) circuit of the intelligent power module, wherein the driving IC circuit comprises 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; wherein:

19. The intelligent power module as recited in claim 18, wherein the first upper leg switching transistor, the second upper leg switching transistor, the third upper leg switching transistor, the first lower leg switching transistor, the second lower leg switching transistor, and the third lower leg switching transistor are Si-based IGBT transistors, and the fourth upper leg switching transistor, the fifth upper leg switching transistor, the sixth upper leg switching transistor, the fourth lower leg switching transistor, the fifth lower leg switching transistor, the sixth lower leg switching transistor, and the PFC switching transistor are SiC-based MOSFET transistors.

20. An intelligent power module is characterized by comprising a PFC (power factor correction) switching tube, 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 and a third lower bridge arm switching tube which correspond to an external first motor, a fourth upper bridge arm switching tube, a fifth upper bridge arm switching tube, a sixth upper bridge arm switching tube, a fourth lower bridge arm switching tube, a fifth lower bridge arm switching tube and a sixth lower bridge arm switching tube which correspond to an external second motor, and a driving IC (integrated circuit) circuit of the intelligent power module, wherein the driving IC circuit comprises 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; wherein:

21. The intelligent power module as recited in claim 20, wherein 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, the fourth upper bridge arm switching tube, the fifth upper bridge arm switching tube, the sixth upper bridge arm switching tube, the fourth lower bridge arm switching tube, the fifth lower bridge arm switching tube, and the sixth lower bridge arm switching tube are Si-based IGBT tubes, and the PFC switching tube is a SiC-based MOSFET tube.

22. An air conditioner comprising a smart power module as claimed in any one of claims 12 to 17, 18 to 19 or 20 to 21.