Power supply control circuit, automobile domain controller and automobile

Abstract

The utility model discloses a power supply control circuit, an automobile domain controller and an automobile, and relates to the technical field of power supply control. The power supply control circuit comprises a main control circuit; the input end of the voltage detection circuit is connected with the power end of the system chip, the output end of the voltage detection circuit is electrically connected with the main control circuit, and the voltage detection circuit is used for detecting the voltage of the power end of the system chip and outputting a corresponding voltage detection signal; the first input end of the driving circuit is electrically connected with the main control circuit, and the second input end is electrically connected with the power supply input end; the first end of the first switching circuit is electrically connected with the grounding end, the controlled end is electrically connected with the output end of the driving circuit, and the second end is electrically connected with the control signal output end; wherein the main control circuit is used for receiving a voltage detection signal and controlling the driving circuit to output a corresponding driving signal; the first switching circuit is used for receiving a driving signal so as to connect or disconnect a path between the control signal output end and the grounding end. The utility model aims to improve the stability of SOC power supply in the automobile domain controller.

Description

Technical Field

[0001] This utility model relates to the field of power supply control technology, and in particular to a power supply control circuit, an automotive domain controller, and an automobile. Background Technology

[0002] With the development of automotive intelligence, domain controllers are becoming increasingly complex, especially in areas such as advanced driver assistance systems (ADAS), infotainment systems, and body electronic systems. Domain controllers typically integrate multiple functions, and to meet high-performance computing demands and implement various intelligent functions, they often incorporate multiple different types of system-on-chips (SoCs). These SoCs can be dedicated GPUs for image processing, AI accelerators for deep learning, general-purpose processors, and so on.

[0003] Currently, automotive domain controllers are often used in conjunction with various types of SoCs. Most domain controllers are woken up via CAN. However, regardless of the type of SoC, during the power-up process, there is a possibility of encountering CAN fast sleep wake-up, which may cause abnormal power supply to the SoC, thereby affecting the startup and function of the domain controller. Utility Model Content

[0004] The main purpose of this invention is to provide a power supply control circuit, an automotive domain controller, and an automobile, aiming to improve the stability of the SOC power supply in the automotive domain controller.

[0005] To achieve the above objectives, the power supply control circuit proposed in this utility model is applied to an automotive domain controller. The automotive domain controller includes a system chip and a CAN communication module. The system chip is electrically connected to the CAN communication module. The power supply control circuit includes:

[0006] Main control circuit;

[0007] A voltage detection circuit is provided, wherein the input terminal of the voltage detection circuit is connected to the power supply terminal of the system chip, and the output terminal of the voltage detection circuit is electrically connected to the main control circuit; the voltage detection circuit is used to detect the power supply terminal voltage of the system chip and output a corresponding voltage detection signal.

[0008] A driving circuit, wherein the first input terminal of the driving circuit is electrically connected to the main control circuit, and the second input terminal of the driving circuit is electrically connected to the power input terminal;

[0009] A first switching circuit, wherein a first terminal of the first switching circuit is electrically connected to a ground terminal, a controlled terminal of the first switching circuit is electrically connected to the output terminal of the drive circuit, and a second terminal of the first switching circuit is electrically connected to a control signal output terminal;

[0010] The main control circuit is used to receive the voltage detection signal and control the drive circuit to output a corresponding drive signal; the first switch circuit is used to receive the drive signal to connect or disconnect the path between the control signal output terminal and the ground terminal.

[0011] In one embodiment, the driving circuit includes:

[0012] The second switching circuit has its first terminal electrically connected to the power input terminal and its controlled terminal electrically connected to the main control circuit.

[0013] A logic control circuit, wherein the first input terminal of the logic control circuit is electrically connected to the enable control terminal, and the second input terminal of the logic control circuit is electrically connected to the second terminal of the second switching circuit;

[0014] The second switching circuit is used to receive a first control signal input from the main control circuit to connect or disconnect the path between the power input terminal and the logic control circuit; the logic control circuit is used to receive a second control signal output from the second switching circuit and a third control signal input from the enable control terminal to output a corresponding drive signal to the first switching circuit.

[0015] In one embodiment, the second switching circuit includes:

[0016] The third switching circuit has its controlled terminal electrically connected to the main control circuit, and its second terminal connected to the ground terminal.

[0017] The fourth switching circuit has its first terminal electrically connected to the power input terminal, its controlled terminal electrically connected to the first terminal of the third switching circuit, and its second terminal electrically connected to the logic control circuit.

[0018] The third switching circuit is used to receive the first control signal output by the main control circuit to connect or disconnect the path between the ground terminal and the controlled terminal of the fourth switching circuit; the fourth switching circuit is used to connect or disconnect the path between the power input terminal and the logic control circuit according to the conduction state between the ground terminal and the controlled terminal of the fourth switching circuit.

[0019] In one embodiment, the third switching circuit includes a first resistor, a second resistor, and a first switching transistor; the fourth switching circuit includes a third resistor, a fourth resistor, and a second switching transistor.

[0020] Wherein, the first end of the first resistor is electrically connected to the main control circuit; the second end of the first resistor is electrically connected to the controlled end of the first switch and the first end of the second resistor; the second end of the second resistor is electrically connected to the second end of the first switch and the ground terminal; the first end of the first switch is electrically connected to the second end of the fourth resistor; the first end of the fourth resistor is electrically connected to the controlled end of the second switch and the second end of the third resistor; the first end of the third resistor is electrically connected to the first end of the second switch and the power input terminal; and the second end of the second switch is electrically connected to the logic control circuit.

[0021] In one embodiment, the logic control circuit includes a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first AND gate;

[0022] Wherein, the first end of the fifth resistor is electrically connected to the second end of the second switching circuit, and the second end of the fifth resistor is electrically connected to the second input end of the first AND gate; the first input end of the first AND gate is electrically connected to the enable control end, the power supply end of the first AND gate is electrically connected to the power supply input end and the first end of the first capacitor, and the output end of the first AND gate is electrically connected to the first end of the second capacitor, the first end of the sixth resistor, and the controlled end of the first switching circuit; the second end of the first capacitor is electrically connected to the ground end; the second end of the second capacitor is electrically connected to the ground end; and the second end of the sixth resistor is electrically connected to the ground end.

[0023] In one embodiment, the first switching circuit includes a seventh resistor and a third switching transistor;

[0024] Wherein, the first end of the seventh resistor is electrically connected to the power input terminal, the second end of the seventh resistor is electrically connected to the first end of the third switch and the control signal output terminal; the controlled end of the third switch is electrically connected to the output terminal of the logic control circuit.

[0025] In one embodiment, the power supply control circuit further includes a voltage regulator circuit, which is electrically connected to the main control circuit.

[0026] In one embodiment, the power supply control circuit further includes an output filter circuit, which is electrically connected to a first terminal of the first switching circuit.

[0027] This utility model also proposes an automotive domain controller, which includes a system chip, a CAN communication module, a power supply circuit, and a power supply control circuit as described in any of the above.

[0028] The system chip is electrically connected to the CAN communication module and the power supply circuit, respectively; the control signal output terminal of the power supply control circuit is electrically connected to the power supply circuit.

[0029] This utility model also proposes an automobile, which includes the automobile domain controller as described above.

[0030] This invention employs a voltage detection circuit to detect the voltage at the power supply terminal of the system chip in an automotive domain controller, and outputs the voltage detection signal to the main control circuit to confirm whether the system chip is powered. When the main control circuit confirms that the system chip is not powered, it outputs a corresponding drive signal to the first switching circuit, causing the first switching circuit to connect the ground terminal and the signal output terminal according to the drive signal. It is understood that after the signal output terminal and the ground terminal are connected, the signal output from the signal output terminal will be pulled low, allowing subsequent circuits to receive this signal and control the corresponding power supply circuit to power the system chip. This effectively avoids the problem of SOC power supply abnormalities caused by the rapid sleep-wake-up of the CAN communication module, and effectively improves the stability of SOC power supply in the automotive domain controller. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the power supply control circuit of this utility model.

[0033] Figure 2 This is a schematic diagram of a module of an embodiment of the power supply control circuit of this utility model;

[0034] Figure 3 This is a schematic diagram of another embodiment of the power supply control circuit of this utility model;

[0035] Figure 4 This is a circuit diagram of one embodiment of the power supply control circuit of this utility model.

[0036] Explanation of icon numbers:

[0037] 10. Main control circuit; 20. Voltage detection circuit; 30. Drive circuit; 31. Second switching circuit; 32. Logic control circuit; 40. First switching circuit; 50. Voltage regulator circuit; 60. Filtering circuit; R1-R9, first resistor-ninth resistor; C1-C3, first capacitor-third capacitor; Q1-Q3, first switching transistor-third switching transistor.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] With the development of automotive intelligence, domain controllers are becoming increasingly complex, especially in areas such as advanced driver assistance systems (ADAS), infotainment systems, and body electronic systems. Domain controllers typically integrate multiple functions, and to meet high-performance computing demands and implement various intelligent functions, they often incorporate multiple different types of system-on-chips (SoCs). These SoCs can be dedicated GPUs for image processing, AI accelerators for deep learning, general-purpose processors, and so on.

[0043] Currently, automotive domain controllers are often used in conjunction with various types of SoCs. Most domain controllers are woken up via CAN. However, regardless of the type of SoC, during the power-up process, there is a possibility of encountering CAN fast sleep wake-up, which may cause abnormal power supply to the SoC, thereby affecting the startup and function of the domain controller.

[0044] To solve the above problems, refer to Figures 1 to 4 This utility model proposes a power supply control circuit for use in an automotive domain controller. The automotive domain controller includes a system chip and a CAN communication module. The system chip is electrically connected to the CAN communication module. The power supply control circuit includes:

[0045] Main control circuit 10;

[0046] A voltage detection circuit 20 is provided, the input terminal of which is connected to the power supply terminal of the system chip, and the output terminal of which is electrically connected to the main control circuit 10. The voltage detection circuit 20 is used to detect the power supply terminal voltage of the system chip and output a corresponding voltage detection signal.

[0047] The driving circuit 30 has a first input terminal electrically connected to the main control circuit 10 and a second input terminal electrically connected to the power input terminal.

[0048] A first switching circuit 40, wherein a first terminal of the first switching circuit 40 is electrically connected to a ground terminal, a controlled terminal of the first switching circuit 40 is electrically connected to an output terminal of the drive circuit 30, and a second terminal of the first switching circuit 40 is electrically connected to a control signal output terminal.

[0049] The main control circuit 10 is used to receive the voltage detection signal and control the drive circuit 30 to output a corresponding drive signal; the first switch circuit 40 is used to receive the drive signal to connect or disconnect the path between the control signal output terminal and the ground terminal.

[0050] Understandably, CAN bus communication is one of the primary methods of automotive network communication, used to transmit sensor data and other critical information. When the vehicle is in sleep mode, certain events (such as door opening, remote key signals, etc.) can wake up the relevant domain controller via CAN bus communication. However, during CAN wake-up, if the power-on sequence of the domain controller or system chip is incorrect, some components may fail to be fully initialized. For example, if the power rail on which the system chip depends fails to reach a stable state in time, it may cause startup failure or other abnormal behavior. Alternatively, after the CAN wake-up signal is triggered, if there is insufficient delay to ensure that all necessary power rails have stabilized, the system chip may attempt to operate before it is fully ready, leading to power supply anomalies. Furthermore, rapid wake-up from sleep mode means a large current supply is required in a short period to meet the needs of the system chip and its peripherals. If the power circuit cannot effectively handle such transient load changes, it may cause voltage drops or fluctuations, thus affecting the normal operation of the system chip. Therefore, corresponding circuitry is needed to ensure that the system chip is also powered when the automotive domain controller is powered, thereby ensuring the stability of the automotive domain controller's operation.

[0051] In this embodiment, the main control circuit 10 can be implemented using a main controller, such as an MCU (Microcontroller Unit), DSP (Digital Signal Processor), or FPGA (Field Programmable Gate Array). The main control circuit 10 receives the voltage detection signal output by the voltage detection circuit 20 to confirm whether the system chip is currently powered. If it confirms that the system chip is not currently powered, it outputs a corresponding control signal to the drive circuit 30, causing the drive circuit 30 to output a corresponding drive signal to the first switching circuit 40, thereby enabling the power supply circuit to power the system chip upon receiving the corresponding signal. Specifically, the main control circuit 10 first confirms whether the automotive domain controller is powered, and then determines the current power supply status of the system chip.

[0052] In this embodiment, the voltage detection circuit 20 can be implemented using a voltage divider circuit, a differential amplifier circuit, a comparator circuit, or a voltage detection chip. Taking a voltage divider circuit as an example, the voltage divider resistor circuit consists of two resistors connected in series. One end of one resistor is connected to the power supply terminal, and the other end is connected to one end of the other resistor, while the other end of the second resistor is grounded. The node between these two resistors is connected to the analog input port of the main control circuit 10. The main control circuit 10 can convert the input analog voltage signal into a digital voltage signal through its built-in analog-to-digital converter module, and calculate the actual input voltage value through a preset software algorithm. By processing the voltage detection signal, the main control circuit 10 determines whether a corresponding voltage is input to the system chip, and then outputs a corresponding control signal to the drive circuit 30, so that the drive circuit 30 outputs a corresponding drive signal.

[0053] In this embodiment, the driving circuit 30 can be implemented using a switching circuit, a logic control circuit 32, a pulse transformer, etc. The driving circuit 30 is electrically connected to the main control circuit 10 to receive the control signal output by the main control circuit 10 and output a corresponding driving signal to the first switching circuit 40. It is understood that the voltage of the control signal output by the main control circuit 10 will vary depending on the circuit used. For example, if the voltage of the control signal output by the main control circuit 10 is 12V, further processing by the driving circuit 30 is required to ensure that the voltage of the driving signal matches the voltage required by the controlled terminal of the first switching circuit 40.

[0054] Optionally, the driving circuit 30 includes:

[0055] The second switching circuit 31 has its first terminal electrically connected to the power input terminal and its controlled terminal electrically connected to the main control circuit 10.

[0056] The logic control circuit 32 has a first input terminal electrically connected to an enable control terminal and a second input terminal electrically connected to a second terminal of the second switching circuit 31.

[0057] The second switching circuit 31 is used to receive the first control signal input by the main control circuit 10 to connect or disconnect the path between the power input terminal and the logic control circuit 32; the logic control circuit 32 is used to receive the second control signal output by the second switching circuit 31 and the third control signal input by the enable control terminal to output the corresponding drive signal to the first switching circuit 40.

[0058] In this embodiment, the driving circuit 30 is implemented using a second switching circuit 31 and a logic control circuit 32. The second switching circuit 31 can be implemented using at least one switching transistor, such as a MOSFET, IGBT, thyristor, transistor, or power transistor. The logic control circuit 32 can be implemented using AND gates, NOT gates, or OR gates. Furthermore, the first terminal of the second switching circuit 31 is electrically connected to the power input terminal, the controlled terminal of the first terminal of the second switching circuit 31 is electrically connected to the main control circuit 10, and the second terminal of the second switching circuit 31 is electrically connected to the logic control circuit 32. The second switching circuit 31 receives a first control signal output by the main control circuit 10, thereby connecting or disconnecting the path between the power input terminal and the logic control circuit 32. It is understood that the voltage output from the power input terminal meets the operating requirements of the logic control circuit 32, and the second switching circuit 31 can also receive the first control signal output by the main control circuit 10 and execute the corresponding action. The logic control circuit 32 receives a third control signal from the enable control terminal and a second control signal from the second switch circuit 31 by electrically connecting its first input terminal to the enable control terminal and its second input terminal to the second terminal of the second switch circuit 31. When the second switch circuit 31 is in the ON state, it connects the power input terminal to the second input terminal of the logic control circuit 32. In this case, the second control signal is a high-level signal output from the power input terminal. When the second switch circuit 31 is in the OFF state, it disconnects the connection between the power input terminal and the second input terminal of the logic control circuit 32. In this case, the second control signal is a low-level signal pulled low by the ground terminal. Furthermore, the enable control terminal is the power supply status output terminal of the automotive domain controller. When the automotive domain controller is powered on, the enable control terminal outputs a high-level signal; when the automotive domain controller is not powered on, the enable control terminal outputs a low-level signal.

[0059] Optionally, the second switching circuit 31 includes:

[0060] The third switching circuit has its controlled terminal electrically connected to the main control circuit 10, and its second terminal connected to the ground terminal.

[0061] The fourth switching circuit has its first terminal electrically connected to the power input terminal, its controlled terminal electrically connected to the first terminal of the third switching circuit, and its second terminal electrically connected to the logic control circuit 32.

[0062] The third switching circuit is used to receive the first control signal output by the main control circuit 10 to connect or disconnect the path between the ground terminal and the controlled terminal of the fourth switching circuit; the fourth switching circuit is used to connect or disconnect the path between the power input terminal and the logic control circuit 32 according to the conduction state between the ground terminal and the controlled terminal of the fourth switching circuit.

[0063] The third switching circuit includes a first resistor R1, a second resistor R2, and a first switching transistor Q1; the fourth switching circuit includes a third resistor R3, a fourth resistor R4, and a second switching transistor Q2.

[0064] Wherein, the first end of the first resistor R1 is electrically connected to the main control circuit 10; the second end of the first resistor R1 is electrically connected to the controlled end of the first switch Q1 and the first end of the second resistor R2; the second end of the second resistor R2 is electrically connected to the second end of the first switch Q1 and the ground terminal; the first end of the first switch Q1 is electrically connected to the second end of the fourth resistor R4; the first end of the fourth resistor R4 is electrically connected to the controlled end of the second switch Q2 and the second end of the third resistor R3; the first end of the third resistor R3 is electrically connected to the first end of the second switch Q2 and the power input terminal; and the second end of the second switch Q2 is electrically connected to the logic control circuit 32.

[0065] The logic control circuit 32 includes a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, and a first AND gate;

[0066] Wherein, the first end of the fifth resistor R5 is electrically connected to the second end of the second switching circuit 31, and the second end of the fifth resistor R5 is electrically connected to the second input end of the first AND gate; the first input end of the first AND gate is electrically connected to the enable control end, the power supply end of the first AND gate is electrically connected to the power supply input end and the first end of the first capacitor C1, the output end of the first AND gate is electrically connected to the first end of the second capacitor C2, the first end of the sixth resistor R6, and the controlled end of the first switching circuit 40; the second end of the first capacitor C1 is electrically connected to the ground end; the second end of the second capacitor C2 is electrically connected to the ground end; and the second end of the sixth resistor R6 is electrically connected to the ground end.

[0067] In this embodiment, the first switch Q1 is used to turn on or off the path between the ground terminal and the controlled terminal of the second switch Q2 according to the first control signal output by the main control circuit 10; the second switch Q2 is used to turn on or off the path between the power input terminal and the logic control circuit 32 according to whether its controlled terminal is connected to the ground terminal. For example, the first switch Q1 is an NPN transistor that turns on at a high level, and the second switch Q2 is a PNP transistor that turns on at a low level. When the first control signal is high, the first switch Q1 turns on, so that the controlled terminal of the second switch Q2 is grounded, and the first terminal of the second switch Q2 is electrically connected to the power input terminal, so that the second switch Q2 turns on, and then outputs the second control signal to the first AND gate. The second control signal is the voltage signal input to the power input terminal. When the main control circuit 10 does not input a signal, a corresponding pull-down resistor, namely the eighth resistor R8, is provided, so that the first control signal received by the controlled terminal of the first switch Q1 is low, so that the first switch Q1 is turned off. At this time, the controlled terminal of the second switch Q2 is electrically connected to the power input terminal via the third resistor R3, and the first terminal of the second switch Q2 is also electrically connected to the power input terminal, thereby turning off the second switch Q2. The fifth circuit is also a pull-down resistor, which, when the second switch Q2 is turned off, ensures that the second control signal received by the first AND gate is a low-level signal. It can be understood that the third control signal input at the enable control terminal is the status signal of the automotive domain controller. For example, when the automotive domain controller is powered on, the third control signal input at the enable control terminal is a high-level signal; when the automotive domain controller is not powered on, the third control signal input at the enable control terminal is a low-level signal. Therefore, when the automotive domain controller is powered on, the first AND gate will output a drive signal to turn on the first switch circuit 40 when the first control signal controls the third switch circuit to conduct.

[0068] Optionally, the first switching circuit 40 includes a seventh resistor R7 and a third switching transistor Q3;

[0069] Wherein, the first end of the seventh resistor R7 is electrically connected to the power input terminal, the second end of the seventh resistor R7 is electrically connected to the first end of the third switch Q3 and the control signal output terminal; the controlled terminal of the third switch Q3 is electrically connected to the output terminal of the logic control circuit 32.

[0070] As described above, the controlled terminal of the third switch Q3 is electrically connected to the output terminal of the logic control circuit 32. Therefore, the type of the third switch Q3 needs to correspond to the drive signal output by the logic control circuit 32. For example, when the drive signal output by the logic control circuit 32 is a high-level signal, the third switch Q3 needs to be turned on, and the third switch Q3 can be implemented using an NMOS transistor. When the third switch Q3 is turned on, the path between the control signal output terminal and the ground terminal will be completed, resulting in a low-level signal output from the signal output terminal. It is understandable that the power supply circuit in the automotive domain controller will determine whether to supply power to the system chip based on the level signal output from the signal output terminal.

[0071] In this embodiment, a voltage detection circuit 20 detects the voltage at the power supply terminal of the system chip in the automotive domain controller and outputs the voltage detection signal to the main control circuit 10 to confirm whether the system chip is in a powered state. When the main control circuit 10 confirms that the system chip is not in a powered state, the control drive circuit 30 outputs a corresponding drive signal to the first switch circuit 40, so that the first switch circuit 40 conducts the path between the ground terminal and the signal output terminal according to the drive signal. It can be understood that after the signal output terminal and the ground terminal are connected, the signal output by the signal output terminal will be pulled low, so that the subsequent circuit receives the signal and controls the corresponding power supply circuit to supply power to the system chip. This effectively avoids the problem of abnormal SOC power supply caused by the rapid sleep and wake-up of the CAN communication module. Through closed-loop control and this stable wake-up method, the stability of SOC power supply in the automotive domain controller is effectively improved.

[0072] In one embodiment of the present invention, the power supply control circuit further includes a voltage regulator circuit 50, which is electrically connected to the main control circuit 10.

[0073] In this embodiment, the voltage regulator circuit 50 can be implemented using a voltage regulator or a Zener diode, so that the third switching circuit in the drive circuit 30 can stably receive the first control signal output by the main control circuit 10 and quickly turn the switching transistor on or off.

[0074] refer to Figure 3 In one embodiment of the present invention, the power supply control circuit further includes an output filter circuit 60, which is electrically connected to the first terminal of the first switch circuit 40.

[0075] In this embodiment, the output filtering circuit 60 can be implemented using a filter capacitor or a corresponding filter to stabilize the level signal output from the control signal output terminal, ensuring that the power supply circuit can accurately execute the corresponding action upon receiving the level signal output from the control signal output terminal. For example, the power supply circuit supplies power to the system chip when it receives a low-level signal.

[0076] refer to Figure 3 This utility model also proposes an automotive domain controller, which includes a system chip, a CAN communication module, a power supply circuit, and a power supply control circuit as described in any of the above embodiments; wherein the system chip is electrically connected to the CAN communication module and the power supply circuit respectively; and the control signal output terminal of the power supply control circuit is electrically connected to the power supply circuit. It is worth noting that since this utility model's automotive domain controller is based on the aforementioned power supply control circuit, the embodiments of this utility model's automotive domain controller include all the technical solutions of all the embodiments of the aforementioned power supply control circuit, and the achieved technical effects are also completely the same, and will not be repeated here.

[0077] This utility model also proposes an automobile, which includes the automobile domain controller as described above. It is worth noting that since the automobile of this utility model is based on the aforementioned automobile domain controller, the embodiments of the automobile of this utility model include all the technical solutions of all embodiments of the aforementioned automobile domain controller, and the achieved technical effects are exactly the same, and will not be repeated here.

[0078] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A power supply control circuit, applied to an automotive domain controller, characterized in that, The vehicle domain controller includes a system chip and a CAN communication module. The system chip is electrically connected to the CAN communication module. The power supply control circuit includes: Main control circuit; A voltage detection circuit is provided, wherein the input terminal of the voltage detection circuit is connected to the power supply terminal of the system chip, and the output terminal of the voltage detection circuit is electrically connected to the main control circuit; the voltage detection circuit is used to detect the power supply terminal voltage of the system chip and output a corresponding voltage detection signal. A driving circuit, wherein the first input terminal of the driving circuit is electrically connected to the main control circuit, and the second input terminal of the driving circuit is electrically connected to the power input terminal; A first switching circuit, wherein a first terminal of the first switching circuit is electrically connected to a ground terminal, a controlled terminal of the first switching circuit is electrically connected to the output terminal of the drive circuit, and a second terminal of the first switching circuit is electrically connected to a control signal output terminal; The main control circuit is used to receive the voltage detection signal and control the drive circuit to output a corresponding drive signal; the first switch circuit is used to receive the drive signal to connect or disconnect the path between the control signal output terminal and the ground terminal.

2. The power supply control circuit as described in claim 1, characterized in that, The driving circuit includes: The second switching circuit has its first terminal electrically connected to the power input terminal and its controlled terminal electrically connected to the main control circuit. A logic control circuit, wherein the first input terminal of the logic control circuit is electrically connected to the enable control terminal, and the second input terminal of the logic control circuit is electrically connected to the second terminal of the second switching circuit; The second switching circuit is used to receive a first control signal input from the main control circuit to connect or disconnect the path between the power input terminal and the logic control circuit; the logic control circuit is used to receive a second control signal output from the second switching circuit and a third control signal input from the enable control terminal to output a corresponding drive signal to the first switching circuit.

3. The power supply control circuit as described in claim 2, characterized in that, The second switching circuit includes: The third switching circuit has its controlled terminal electrically connected to the main control circuit, and its second terminal connected to the ground terminal. The fourth switching circuit has its first terminal electrically connected to the power input terminal, its controlled terminal electrically connected to the first terminal of the third switching circuit, and its second terminal electrically connected to the logic control circuit. The third switching circuit is used to receive the first control signal output by the main control circuit to connect or disconnect the path between the ground terminal and the controlled terminal of the fourth switching circuit; the fourth switching circuit is used to connect or disconnect the path between the power input terminal and the logic control circuit according to the conduction state between the ground terminal and the controlled terminal of the fourth switching circuit.

4. The power supply control circuit as described in claim 3, characterized in that, The third switching circuit includes a first resistor, a second resistor, and a first switching transistor; the fourth switching circuit includes a third resistor, a fourth resistor, and a second switching transistor. Wherein, the first end of the first resistor is electrically connected to the main control circuit; the second end of the first resistor is electrically connected to the controlled end of the first switch and the first end of the second resistor; the second end of the second resistor is electrically connected to the second end of the first switch and the ground terminal; the first end of the first switch is electrically connected to the second end of the fourth resistor; the first end of the fourth resistor is electrically connected to the controlled end of the second switch and the second end of the third resistor; the first end of the third resistor is electrically connected to the first end of the second switch and the power input terminal; and the second end of the second switch is electrically connected to the logic control circuit.

5. The power supply control circuit as described in claim 2, characterized in that, The logic control circuit includes a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first AND gate; Wherein, the first end of the fifth resistor is electrically connected to the second end of the second switching circuit, and the second end of the fifth resistor is electrically connected to the second input end of the first AND gate; the first input end of the first AND gate is electrically connected to the enable control end, the power supply end of the first AND gate is electrically connected to the power supply input end and the first end of the first capacitor, and the output end of the first AND gate is electrically connected to the first end of the second capacitor, the first end of the sixth resistor, and the controlled end of the first switching circuit; the second end of the first capacitor is electrically connected to the ground end; the second end of the second capacitor is electrically connected to the ground end; and the second end of the sixth resistor is electrically connected to the ground end.

6. The power supply control circuit as described in claim 2, characterized in that, The first switching circuit includes a seventh resistor and a third switching transistor; Wherein, the first end of the seventh resistor is electrically connected to the power input terminal, the second end of the seventh resistor is electrically connected to the first end of the third switch and the control signal output terminal; the controlled end of the third switch is electrically connected to the output terminal of the logic control circuit.

7. The power supply control circuit as described in claim 1, characterized in that, The power supply control circuit also includes a voltage regulator circuit, which is electrically connected to the main control circuit.

8. The power supply control circuit as described in claim 1, characterized in that, The power supply control circuit further includes an output filter circuit, which is electrically connected to the first terminal of the first switching circuit.

9. A vehicle domain controller, characterized in that, The vehicle domain controller includes a system chip, a CAN communication module, a power supply circuit, and a power supply control circuit as described in any one of claims 1 to 8; The system chip is electrically connected to the CAN communication module and the power supply circuit, respectively; the control signal output terminal of the power supply control circuit is electrically connected to the power supply circuit.

10. A car, characterized in that, The vehicle includes the vehicle domain controller as described in claim 9.

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