IPM module and application system

Abstract

The utility model belongs to the technical field of semiconductor devices, and discloses an IPM module and an application system. Comprising a current input pin, a first PWM signal input pin, a second PWM signal input pin, a current output pin, a grounding pin, two temperature measurement pins, at least one first switch tube, at least one second switch tube, a thermistor, a plurality of first resistors and a plurality of second resistors. A temperature monitoring function is integrated, the problem of an existing IPM module in DCDC conversion application is solved, and the IPM module has the advantages of optimizing the temperature monitoring function, improving the conversion efficiency, reducing electromagnetic interference and being high in reliability.

Description

Technical Field

[0001] The present application relates to the field of semiconductor device technology, and in particular to an IPM module and an application system. Background Art

[0002] IPM module (Intelligent Power Module) is an intelligent power module that integrates power devices, drive circuits, protection circuits, etc. in one module, and has the characteristics of high integration, high reliability, high efficiency, etc. IPM modules are widely used in inverters, servo drives, motor control and other fields, and play an important role in industrial automation and power electronics systems.

[0003] However, with the rapid development of power electronics technology, IPM modules still face many challenges in design and application. First, the thermal management issues of power IPM module devices and systems are becoming increasingly prominent. As power density continues to increase, heat accumulation inside the module becomes more serious. How to effectively dissipate heat and ensure long-term reliable operation of the module becomes a key issue. Secondly, while pursuing high integration, the impact of electromagnetic interference (EMI) has become more significant. The mutual interference between the functional units inside the module, as well as the electromagnetic compatibility issues between the module and the external system, need to be considered and resolved in the design.

[0004] In addition, the existing IPM modules still have some deficiencies in DCDC DC conversion applications. For example, the temperature monitoring function is not perfect, making it difficult to grasp the working status of the module in real time; the drive circuit design of the switch tube is not optimized enough, affecting the conversion efficiency; the module packaging structure needs to be improved to improve heat dissipation performance and reliability.

[0005] In view of the above problems, the existing technology needs to be improved urgently. Utility Model Content

[0006] The purpose of this application is to provide an IPM module and application system, which has the advantages of optimizing temperature monitoring function, improving conversion efficiency, reducing electromagnetic interference and high reliability.

[0007] In a first aspect, the present application provides an IPM module, which is a DCDC direct current conversion module, including a current input pin, a first PWM signal input pin, a second PWM signal input pin, a current output pin, a ground pin, two temperature measurement pins, at least one first switch tube, at least one second switch tube, a thermistor, a plurality of first resistors, and a plurality of second resistors;

[0008] The drains of all the first switch tubes are connected to the current input pin, and the sources of all the first switch tubes and the drains of all the second switch tubes are connected to the current output pin; a first resistor is connected in series between the gate of each of the first switch tubes and the first PWM signal input pin, and between the gate of each of the second switch tubes and the second PWM signal input pin; a second resistor is connected in series between the gate of each of the first switch tubes and the current output pin, and between the gate of each of the second switch tubes and the ground pin; and the two ends of the thermistor are respectively connected to the two temperature measurement pins.

[0009] Preferably, the first switch tube and the second switch tube are both MOSFET tubes, IGBT tubes or silicon carbide switch tubes.

[0010] Preferably, the resistance value of the first resistor is 1.6Ω-3.5Ω.

[0011] Preferably, the resistance value of the second resistor is 10 kΩ-15 kΩ.

[0012] Preferably, two first switching tubes are provided, and three second switching tubes are provided.

[0013] Preferably, the IPM module is packaged using a DIP25 packaging structure.

[0014] In a second aspect, the present application provides an application system, including an input circuit, the IPM module described above, a load circuit, a Gate drive circuit, a PWM controller, and an isolated feedback circuit;

[0015] The current input pin of the IPM module is connected to the input circuit, the current output pin is connected to the load circuit, the first PWM signal input pin and the second PWM signal input pin are both connected to the Gate drive circuit, the two temperature measurement pins are both connected to the PWM controller, and the ground pin is grounded;

[0016] The input circuit is also connected to the load circuit; the PWM controller is also connected to the Gate drive circuit; the isolation feedback circuit is connected to the PWM controller and the load circuit;

[0017] The PWM controller is used to generate a PWM signal according to the feedback signal of the isolation feedback circuit and the temperature signal of the IPM module and send it to the Gate drive circuit to drive the first switch tube and the second switch tube of the IPM module to turn on and off through the Gate drive circuit.

[0018] Preferably, the input circuit comprises a filter circuit, an input end of the filter circuit is connected to an input power supply, and an output end of the filter circuit is connected to the current input pin of the IPM module and the load circuit.

[0019] Preferably, the output end of the filter circuit is connected to the current input pin of the IPM module through a capacitor.

[0020] Preferably, the load circuit includes a transformer and a post-stage circuit, the two ends of the primary side of the transformer are respectively connected to the output end of the filter circuit and the current output pin of the IPM module, the two ends of the secondary side are connected to the post-stage circuit, and the isolation feedback circuit is connected to the post-stage circuit.

[0021] Beneficial effects: The IPM module and application system provided in this application solve the problems existing in the existing IPM module in DCDC direct current conversion applications by reasonably designing the connection method and driving circuit of the switch tube and integrating the temperature monitoring function. It has the advantages of optimizing the temperature monitoring function, improving the conversion efficiency, reducing electromagnetic interference and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a circuit structure diagram of the IPM module provided in an embodiment of the present application.

[0023] Figure 2 It is a structural diagram of the DIP25 packaging structure.

[0024] Figure 3 A schematic diagram of the structure of the application system provided in the embodiment of the present application.

[0025] Explanation of reference numerals: 1. Current input pin; 2. Current output pin; 3. Ground pin; 4. Temperature measurement pin; 5. Second PWM signal input pin; 6. First PWM signal input pin; 7. First switch tube; 8. Second switch tube; 9. First resistor; 10. Second resistor; 11. Thermistor; 12. DBC substrate; 100. IPM module; 200. Input circuit; 201. Filter circuit; 202. Capacitor; 300. Load circuit; 301. Transformer; 302. Post-stage circuit; 400. Gate drive circuit; 500. PWM controller; 600. Isolation feedback circuit. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] The development of intelligent power modules (IPMs) can be traced back to the late 1980s. The initial IPMs mainly integrated power devices and drive circuits to simplify the design of motor drive systems. With technological advances, IPMs have gradually incorporated more functions, such as overcurrent protection and overheating protection, which greatly improves system reliability and safety.

[0029] However, with the rapid development of power electronics technology, especially in high-power applications, traditional IPM modules face new challenges. The thermal management problem caused by high power density is becoming increasingly prominent. At the same time, as the switching frequency and current increase, the electromagnetic interference (EMI) problem becomes more serious, which not only affects the system stability, but also may cause malfunction of surrounding equipment.

[0030] In order to solve these problems, this application proposes an innovative IPM module design.

[0031] Please refer to Figure 1-Figure 2 In some embodiments of the present application, an IPM module 100 is a DCDC direct current conversion module, comprising a current input pin 1, a first PWM signal input pin 6, a second PWM signal input pin 5, a current output pin 2, a ground pin 3, two temperature measurement pins 4, at least one first switch tube 7, at least one second switch tube 8, a thermistor 11, a plurality of first resistors 9 and a plurality of second resistors 10;

[0032] The drains (D poles) of all first switch tubes 7 are connected to the current input pin 1, and the sources (S poles) of all first switch tubes 7 and the drains of all second switch tubes 8 are connected to the current output pin 2; a first resistor 9 is connected in series between the gate (G pole) of each first switch tube 7 and the first PWM signal input pin 6, and between the gate of each second switch tube 8 and the second PWM signal input pin 5; a second resistor 10 is connected in series between the gate of each first switch tube 7 and the current output pin 2, and between the gate of each second switch tube 8 and the ground pin 3; and both ends of the thermistor 11 are respectively connected to the two temperature measurement pins 4.

[0033] This design realizes efficient DCDC conversion function by properly arranging the switch tube connection mode. The drain of the first switch tube 7 is connected to the current input pin 1, and the source of the first switch tube 7 and the drain of the second switch tube 8 are connected to the current output pin 2, forming an efficient current conversion path.

[0034] A first resistor 9 is connected in series between the gate of each first switch tube 7 and the first PWM signal input pin 6, and between the gate of each second switch tube 8 and the second PWM signal input pin 5, which effectively suppresses the high-frequency oscillation caused by the PWM signal and reduces electromagnetic interference. At the same time, a second resistor 10 is connected in series between the gate of each first switch tube 7 and the current output pin 2, and between the gate of each second switch tube 8 and the ground pin 3, to further reduce EMI and play a protective role to avoid the switch tube from being mistakenly turned on due to common ground interference. The second resistor 10 can also increase the switching speed and quickly shut down the switch tube by providing a charge channel to the ground.

[0035] Thermistor 11 is introduced, and its two ends are connected to two temperature measuring pins 4 respectively. This design enables the module to monitor the temperature in real time, providing a basis for temperature protection. Through the temperature measuring pin 4, the external control circuit can obtain the module temperature information at any time and take cooling or protection measures in time (for example, when the temperature is too high, turn off each switch tube or reduce the output power).

[0036] Therefore, the IPM module 100 has the advantages of optimizing temperature monitoring function, improving conversion efficiency, reducing electromagnetic interference and having high reliability.

[0037] In practical applications, switch tubes of different types and performance parameters can be selected as the first switch tube 7 and the second switch tube 8 according to specific needs; such as MOSFET tubes, IGBT tubes or silicon carbide switch tubes; these switch tube types have the characteristics of high efficiency, fast switching and low conduction loss, and are suitable for high-power DCDC DC conversion modules. By selecting the appropriate switch tube type, the efficiency and performance of the DCDC DC conversion module can be improved. MOSFET tubes are suitable for low-voltage and high-frequency applications, IGBT tubes are suitable for high-voltage and high-power applications, and silicon carbide switch tubes have higher withstand voltage and lower switching losses. According to specific application requirements and working conditions, the most suitable switch tube type can be selected to achieve optimal conversion efficiency and reliability. This design scheme provides a flexible selection space for the IPM module 100, and the appropriate switch tube type can be selected according to different application scenarios and performance requirements. At the same time, the use of these high-performance switch tubes can increase the power density of the module, reduce the volume, and improve the efficiency of the overall system.

[0038] The resistance values ​​of the first resistor 9 and the second resistor 10 can be set according to actual needs.

[0039] For example, the resistance value of the first resistor 9 is 1.6Ω-3.5Ω. The selection of this resistance value range can appropriately limit the current and prevent the switch tube from being subjected to excessive current shock while ensuring the effective transmission of the PWM signal. At the same time, the resistance value in this range can also suppress high-frequency noise to a certain extent and improve the anti-interference ability of the system. By reasonably setting the resistance value of the first resistor 9, the control performance and reliability of the IPM module 100 can be optimized. This design helps to improve the switching speed and efficiency of the module while protecting the switch tube from damage caused by excessive current or voltage shock. In addition, the appropriate resistance value can also reduce electromagnetic interference and improve the stability and reliability of the entire system.

[0040] For example, the resistance value of the second resistor 10 is 10kΩ-15kΩ. The selection of this resistance value range can protect the switch tube, improve the switch characteristics, suppress parasitic oscillation, and adjust the switch timing. By setting the resistance value of the second resistor 10 within this range, a good balance can be achieved in many aspects, thereby improving the performance and reliability of the IPM module 100.

[0041] However, the resistance value ranges of the first resistor 9 and the second resistor 10 are not limited thereto.

[0042] The number of the first switch tubes 7 and the second switch tubes 8 can be flexibly configured according to power requirements. Figure 1In the embodiment, two first switch tubes 7 are provided and three second switch tubes 8 are provided. This configuration can improve the current handling capacity and conversion efficiency of the module. Specifically, the two first switch tubes 7 used in parallel can increase the current carrying capacity of the current input pin while reducing the conduction loss. The three second switch tubes 8 used in parallel can increase the current handling capacity of the current output pin 2 and further reduce the conduction loss. This configuration can achieve a higher switching frequency while ensuring sufficient current handling capacity, thereby improving the efficiency of DCDC conversion.

[0043] In some preferred embodiments, the IPM module 100 is packaged using a DIP25 packaging structure.

[0044] The DIP25 packaging structure is a standardized packaging method suitable for the IPM module 100. The use of this packaging structure can achieve the following effects: First, the DIP25 packaging structure can effectively protect the internal electronic components, including the switch tube, resistor and thermistor 11, etc., to prevent them from being damaged by the external environment. Secondly, this packaging structure can provide good heat dissipation performance. The IPM module 100 generates a lot of heat during operation, and the DIP25 packaging structure helps to dissipate heat and ensure the stable operation of the module. Thirdly, the DIP25 packaging structure has a standardized pin arrangement, which is convenient for the installation and replacement of the module. This standardized packaging method allows the IPM module 100 to be easily integrated into various application systems, improving the versatility and compatibility of the module. In addition, the DIP25 packaging structure has high integration, short connection leads, high efficiency, small parasitic parameters, and is conducive to reducing electromagnetic interference. Finally, the DIP25 packaging structure can also provide good electrical isolation performance, reduce electromagnetic interference, and improve the reliability of the module.

[0045] refer to Figure 2 The DIP25 package structure includes a DBC substrate 12 (copper-clad ceramic substrate), a first switch tube 7, a second switch tube 8, a thermistor 11, a first resistor 9 and a second resistor 10 are concentrated in the middle of the DBC substrate 12, and each pin (including a current input pin 1, a first PWM signal input pin 6, a second PWM signal input pin 5, a current output pin 2, a ground pin 3 and two temperature measurement pins 4) are distributed on two opposite sides of the DBC substrate 12; wherein, both sides of the DBC substrate 12 have a copper cladding layer.

[0046] Preferably, the DBC substrate 12 is an alumina ceramic substrate with an alumina content greater than 96%, a thickness of 0.75±0.05 mm, a thermal conductivity of 24 W / mK, a copper layer thickness of 0.3 mm, a peel strength between the copper layer and the alumina ceramic greater than 4 N / mm, and a pressure resistance greater than 2.5 KVRMS. The use of the DBC substrate 12 can effectively ensure heat dissipation performance and pressure resistance performance.

[0047] In a specific embodiment, a circuit structure of an IPM module 100 is as follows: Figure 1 As shown, the DIP25 package structure is as follows Figure 2 As shown, the performance parameters of the DBC substrate 12 are as shown above, the first switch tube 7 and the second switch tube 8 are both MOSFET tubes, the rated voltage of the MOSFET tube is 150V, the resistance value is 7mΩ-10mΩ, the resistance value of the first resistor 9 is 2.2Ω, and the resistance value of the second resistor 10 is 10kΩ. The IPM module 100 can effectively improve the conversion efficiency, reduce electromagnetic interference and has high reliability.

[0048] refer to Figure 3 , the present application provides an application system, including an input circuit 200, the aforementioned IPM module 100, a load circuit 300, a Gate drive circuit 400, a PWM controller 500 and an isolated feedback circuit 600;

[0049] The current input pin 1 of the IPM module 100 is connected to the input circuit 200, the current output pin 2 is connected to the load circuit 300, the first PWM signal input pin 6 and the second PWM signal input pin 5 are both connected to the Gate drive circuit 400, the two temperature measurement pins 4 are both connected to the PWM controller 500, and the ground pin 3 is grounded;

[0050] The input circuit 200 is also connected to the load circuit 300; the PWM controller 500 is also connected to the Gate drive circuit 400; the isolated feedback circuit 600 is connected to the PWM controller 500 and the load circuit 300;

[0051] The PWM controller 500 is used to generate a PWM signal based on the feedback signal of the isolation feedback circuit 600 and the temperature signal of the IPM module 100 (the temperature signal is generated by the thermistor 11) and send it to the Gate drive circuit 400 to drive the first switch tube 7 and the second switch tube 8 of the IPM module 100 to turn on and off through the Gate drive circuit 400.

[0052] Among them, the IPM module 100, as the core component of the system, is responsible for realizing the DCDC direct current conversion function. It realizes voltage conversion through the control of the first switch tube 7 and the second switch tube 8. The current input pin 1 of the IPM module 100 is connected to the input circuit 200, and the current output pin 2 is connected to the load circuit 300. This connection method ensures the effective transmission and conversion of current. The first PWM signal input pin 6 and the second PWM signal input pin 5 are both connected to the Gate drive circuit 400, which enables the IPM module 100 to receive accurate control signals. The two temperature measurement pins 4 are both connected to the PWM controller 500, realizing real-time temperature monitoring and effectively preventing overheating failures.

[0053] The gate drive circuit 400 is responsible for converting the PWM signal generated by the PWM controller 500 into a signal suitable for driving the switch tube in the IPM module 100. The gate drive circuit 400 can use optical coupling isolation or magnetic isolation technology to improve the anti-interference ability and safety of the system, and can also use other existing switch tube drive circuits. In addition, the gate drive circuit 400 can also integrate functions such as overcurrent protection and undervoltage lockout to further enhance the reliability of the system.

[0054] The PWM controller 500 is the control center of the system. It generates a suitable PWM signal according to the feedback signal provided by the isolated feedback circuit 600 and the temperature signal of the IPM module 100. The PWM controller 500 can be a digital controller or an analog controller, which can be selected according to specific application requirements. The digital controller has higher flexibility and accuracy, while the analog controller may have a faster response speed.

[0055] The isolated feedback circuit 600 provides an electrically isolated feedback signal, thereby enhancing the safety of the system. The isolated feedback circuit 600 can be implemented using technologies such as optocouplers or digital isolators to ensure effective isolation between the control circuit and the power circuit.

[0056] Through this system design, the present application realizes precise control of the IPM module 100, while taking into account safety measures such as temperature protection and feedback control, thereby improving the reliability and stability of the system. The modular design of the system also improves flexibility and maintainability. In particular, the present application realizes precise control and protection of the IPM module 100 through the coordinated work of the PWM controller 500, the Gate drive circuit 400 and the isolation feedback circuit 600. Real-time monitoring using the temperature signal of the IPM module 100 can effectively prevent faults such as overheating, thereby improving the safety and reliability of the system.

[0057] Preferably, see Figure 3 The input circuit 200 includes a filter circuit 201, an input end of the filter circuit 201 is connected to an input power source (PV+ and PV- in the figure represent the positive and negative poles of the input power source, respectively), and an output end is connected to a current input pin 1 of the IPM module 100 and a load circuit 300.

[0058] The input end of the filter circuit 201 is connected to the input power supply, which can effectively filter out high-frequency noise and interference signals in the input power supply. The output end of the filter circuit 201 is connected to the current input pin 1 of the IPM module 100 and the load circuit 300 at the same time. This connection method can ensure that the filtered current is supplied to the IPM module 100 and the load circuit 300 at the same time, thereby improving the power quality of the entire system.

[0059] In a specific implementation, the filter circuit 201 may be in various forms, such as an LC filter, but not limited thereto, and specific parameters of the filter circuit 201 may be adjusted according to factors such as the operating frequency and power of the system.

[0060] Furthermore, the output end of the filter circuit 201 is connected to the current input pin 1 of the IPM module 100 through the capacitor 202 .

[0061] By adding a capacitor 202 between the output end of the filter circuit 201 and the current input pin 1 of the IPM module 100, the connection between the input circuit 200 and the current input pin 1 is achieved. The capacitor 202 plays a role in filtering, buffering and decoupling, effectively improving the stability and reliability of the system.

[0062] The capacitance and type of the capacitor 202 can be selected according to actual needs and are not limited here.

[0063] Furthermore, the load circuit 300 includes a transformer 301 and a post-stage circuit 302, the two ends of the primary side of the transformer 301 are respectively connected to the output end of the filter circuit 201 and the current output pin 2 of the IPM module 100, the two ends of the secondary side are connected to the post-stage circuit 302, and the isolation feedback circuit 600 is connected to the post-stage circuit 302.

[0064] The transformer 301 plays the role of voltage conversion and electrical isolation in the load circuit 300. By connecting the primary side of the transformer 301 to the output end of the filter circuit 201 and the output end of the IPM module 100, the conversion and isolation of the input voltage can be achieved. The secondary side of the transformer 301 is connected to the subsequent circuit 302 to provide the required voltage and current for the subsequent circuit 302. The isolation feedback circuit 600 is connected to the subsequent circuit 302, and can collect the output information of the subsequent circuit 302 and feed this information back to the PWM controller 500. This isolation feedback design can ensure the electrical isolation between the control signal and the power circuit, and improve the safety and reliability of the system. Through this structural design, the system can achieve efficient power conversion and precise output control. The transformer 301 provides electrical isolation and voltage conversion functions, while the isolation feedback circuit 600 ensures the stability and accuracy of the control loop. This design not only improves the efficiency and performance of the system, but also enhances the safety and reliability of the entire application system. In addition, the design also has good scalability and adaptability. By adjusting the parameters of the transformer 301 and the design of the subsequent circuit 302, different output requirements can be met, so that the application system can be used in various application scenarios.

[0065] The transformer 301 may be of various types, such as a Feibo transformer, an EE type transformer or a planar transformer, but not limited thereto. The turns ratio of the transformer 301 may be designed according to specific voltage conversion requirements, such as 5:30, but not limited thereto.

[0066] The subsequent circuit 302 can be configured according to actual application scenarios and is not limited here.

[0067] The isolated feedback circuit 600 can be implemented by using an optocoupler or a digital isolator.

[0068] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0069] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An IPM module, the IPM module is a DCDC direct current conversion module, characterized in that: It comprises a current input pin (1), a first PWM signal input pin (6), a second PWM signal input pin (5), a current output pin (2), a ground pin (3), two temperature measurement pins (4), at least one first switch tube (7), at least one second switch tube (8), a thermistor (11), a plurality of first resistors (9) and a plurality of second resistors (10); The drains of all the first switch tubes (7) are connected to the current input pin (1), and the sources of all the first switch tubes (7) and the drains of all the second switch tubes (8) are connected to the current output pin (2); a first resistor (9) is connected in series between the gate of each of the first switch tubes (7) and the first PWM signal input pin (6), and between the gate of each of the second switch tubes (8) and the second PWM signal input pin (5); a second resistor (10) is connected in series between the gate of each of the first switch tubes (7) and the current output pin (2), and between the gate of each of the second switch tubes (8) and the ground pin (3); and both ends of the thermistor (11) are connected to the two temperature measurement pins (4) respectively.

2. The IPM module according to claim 1, characterized in that: The first switch tube (7) and the second switch tube (8) are both MOSFET tubes, IGBT tubes or silicon carbide switch tubes.

3. The IPM module according to claim 1, characterized in that: The resistance value of the first resistor (9) is 1.6Ω-3.5Ω.

4. The IPM module according to claim 1, characterized in that: The resistance value of the second resistor (10) is 10 kΩ-15 kΩ.

5. The IPM module according to claim 1, characterized in that: Two first switch tubes (7) are provided, and three second switch tubes (8) are provided.

6. The IPM module according to any one of claims 1 to 5, characterized in that: The IPM module is packaged using a DIP25 packaging structure.

7. An application system, characterized in that: It comprises an input circuit (200), an IPM module (100) according to any one of claims 1 to 6, a load circuit (300), a gate drive circuit (400), a PWM controller (500) and an isolation feedback circuit (600); The current input pin (1) of the IPM module (100) is connected to the input circuit (200), the current output pin (2) is connected to the load circuit (300), the first PWM signal input pin (6) and the second PWM signal input pin (5) are both connected to the Gate drive circuit (400), the two temperature measurement pins (4) are both connected to the PWM controller (500), and the ground pin (3) is grounded; The input circuit (200) is also connected to the load circuit (300); the PWM controller (500) is also connected to the Gate drive circuit (400); the isolation feedback circuit (600) is connected to the PWM controller (500) and the load circuit (300); The PWM controller (500) is used to generate a PWM signal according to a feedback signal of the isolation feedback circuit (600) and a temperature signal of the IPM module (100), and send the PWM signal to the Gate drive circuit (400), so as to drive the first switch tube (7) and the second switch tube (8) of the IPM module (100) to turn on and off through the Gate drive circuit (400).

8. The application system according to claim 7, characterized in that: The input circuit (200) comprises a filter circuit (201), wherein the input end of the filter circuit (201) is connected to an input power source, and the output end is connected to the current input pin (1) of the IPM module (100) and the load circuit (300).

9. The application system according to claim 8, characterized in that: The output end of the filter circuit (201) is connected to the current input pin (1) of the IPM module (100) via a capacitor (202).

10. The application system according to claim 8, characterized in that: The load circuit (300) comprises a transformer (301) and a subsequent circuit (302); two ends of the primary side of the transformer (301) are respectively connected to the output end of the filter circuit (201) and the current output pin (2) of the IPM module (100); two ends of the secondary side are connected to the subsequent circuit (302); and the isolation feedback circuit (600) is connected to the subsequent circuit (302).

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