A controller, a chip, an automobile control system and an automobile for an automobile

Abstract

The embodiment of the application provides a controller, a chip, an automobile control system and an automobile for the automobile. The controller comprises a control circuit and a driving circuit, a power supply end of the control circuit is connected with a linear voltage stabilizer, a first input end of the control circuit is connected with an output end of an external circuit; a second input end of the control circuit is connected with a first reference voltage, an output end of the control circuit is connected with an input end of the driving circuit, and an output end of the driving circuit is connected with an input end of the external circuit. The control circuit is used for outputting a control signal to the driving circuit according to the first reference voltage and a voltage signal output by the output end of the external circuit. The driving circuit is used for outputting a driving signal according to the control signal, and driving the external circuit to work. In the embodiment, the power supply end of the control circuit is connected with the linear voltage stabilizer, the linear voltage stabilizer can provide a lower voltage input for the power supply end of the control circuit, and only low-voltage devices are needed to match the voltage input by the power supply end in the control circuit, so that the area of the controller is reduced.

Description

Technical Field

[0001] This application relates to the field of automotive control, specifically to a controller, chip, automotive control system, and automobile for use in automobiles. Background Technology

[0002] In existing technologies, the boost function required in automotive headlight design is generally achieved by connecting a controller and a power transistor. The controller is typically powered by the vehicle battery. Due to reliability requirements, the controller's power supply voltage usually needs a wide input voltage range, for example, from 4.5V to 52V. Furthermore, the controller requires internal high-voltage components to match the higher input voltage.

[0003] However, the large area occupied by high-voltage devices leads to a large area of ​​controller. With the development of new energy vehicles, large-area controllers can no longer meet people's needs. Summary of the Invention

[0004] In view of the above problems, embodiments of this application provide a controller, chip, vehicle control system and vehicle for automobiles, which overcomes the above problems or at least partially solves the problem of the large area of ​​the controller.

[0005] A first aspect of this application provides a controller for an automobile, disposed in an automobile control system. The automobile control system includes a linear regulator, and the controller includes a control circuit and a drive circuit. The power supply terminal of the control circuit is connected to the linear regulator, and a first input terminal of the control circuit is connected to the output terminal of an external circuit. A second input terminal of the control circuit is connected to a first reference voltage. The output terminal of the control circuit is connected to the input terminal of the drive circuit, and the output terminal of the drive circuit is connected to the input terminal of the external circuit. The control circuit outputs a control signal to the drive circuit based on the first reference voltage and a voltage signal output from the output terminal of the external circuit. The drive circuit outputs a drive signal based on the control signal to drive the external circuit to operate.

[0006] In this embodiment, the control circuit outputs a control signal to the drive circuit based on the first reference voltage and the voltage signal output from the output terminal of the external circuit. The drive circuit then outputs a drive signal based on the control signal to drive the external circuit. While the controller drives the external circuit, it connects the power supply terminal of the control circuit to a linear regulator within the vehicle control system. This allows the linear regulator to provide a lower voltage input to the control circuit's power supply terminal. Since the control circuit only needs low-voltage components to match the input voltage, the area of ​​the control circuit and the number of mask layers can be reduced.

[0007] In one alternative embodiment, the controller further includes a voltage conversion circuit, the input of which is connected to the linear regulator, and the output of which is connected to the drive circuit. The voltage conversion circuit is used to convert the output voltage of the linear regulator into the power supply voltage of the drive circuit.

[0008] In this embodiment, the output voltage of the linear regulator can be converted into a suitable supply voltage for the drive circuit via a voltage conversion circuit, enabling the drive circuit to output a drive signal. This allows the control circuit and the drive circuit to share a single linear regulator, simplifying the controller's internal structure.

[0009] In one alternative embodiment, the voltage conversion circuit includes: a first capacitor, a second capacitor, a first switch, a second switch, a third switch, and a fourth switch. The first terminals of both the first and second switches are connected to a linear regulator. The second terminal of the first switch is connected to the first terminals of both the first and third capacitors. The second terminal of the third switch and the first terminal of both the second and third capacitors are grounded. The second terminal of the second switch is connected to the second terminal of both the first and fourth capacitors. The second terminal of the fourth switch, after being connected to the second terminal of the second capacitor, serves as the output terminal of the voltage conversion circuit and is connected to the drive circuit.

[0010] In one alternative embodiment, the voltage conversion circuit includes: a boost module, a first inductor, a first MOSFET, a first diode, a first resistor, a second resistor, and a third capacitor. The power supply terminal of the boost module is connected to the output terminal of a linear regulator. The first input terminal of the boost module is connected to a second reference voltage. The output terminal of the boost module is connected to the gate of the first MOSFET, and the source of the first MOSFET is grounded. The first terminal of the first inductor is connected to the linear regulator, and the second terminal of the first inductor is connected to the drain of the first MOSFET and the anode of the first diode. The cathode of the first diode is connected to the first terminal of the first resistor and the first terminal of the third capacitor, and the second terminal of the third capacitor is grounded. The second terminal of the first resistor is connected to the first terminal of the second resistor and the second input terminal of the boost module, and the second terminal of the second resistor is grounded. The connection point between the cathode of the first diode and the first terminal of the first resistor serves as the output terminal of the voltage conversion circuit and is connected to the drive circuit.

[0011] In one alternative embodiment, the control circuit includes an amplifier module, a comparator module, and a logic control circuit module connected in sequence. The first input terminal of the amplifier module is connected to the output terminal of the external circuit as the first input terminal of the control circuit, and the output terminal of the logic control circuit module is connected to the input terminal of the drive circuit as the output terminal of the control circuit.

[0012] In an alternative embodiment, the controller further includes a feedback circuit connected between the first input terminal of the control circuit and the output terminal of the external circuit.

[0013] In this embodiment, the first input terminal of the control circuit is connected to the output terminal of the external circuit through a feedback circuit. The controller can adjust the voltage signal output by the external circuit in a timely manner when the output of the external circuit does not reach the target voltage value.

[0014] In one alternative embodiment, the feedback circuit includes a third resistor and a fourth resistor. The first terminal of the third resistor is connected to the output terminal of the external circuit, the second terminal of the third resistor is connected to both the first terminal of the fourth resistor and the first input terminal of the control circuit, and the second terminal of the fourth resistor is grounded.

[0015] A second aspect of this application provides a chip for an automobile, comprising: an external circuit and a controller provided in the first aspect of this application. The external circuit includes a second inductor, a second MOSFET, a second diode, and a fourth capacitor. A first terminal of the second inductor is connected to an automobile battery, and a second terminal of the second inductor is connected to the drain of the second MOSFET and the anode of the second diode. The gate of the second MOSFET is connected as the input terminal of the external circuit and to the output terminal of the controller's drive circuit, and the source of the second MOSFET is grounded. The cathode of the second diode is connected to the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is grounded, and the cathode of the second diode serves as the output terminal of the external circuit.

[0016] A third aspect of this application provides an automotive control system for automobiles, including the chip provided in the second aspect of this application.

[0017] A fourth aspect of this application provides an automobile, including the automobile control system provided in the third aspect of this application.

[0018] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1A circuit including a controller chip provided in an embodiment of this application. Figure 1 .

[0021] Figure 2 A circuit including a controller chip provided in an embodiment of this application. Figure 2 .

[0022] Figure label:

[0023] 01. Control circuit; 02. Drive circuit; 03. External circuit; 04. Voltage conversion circuit; 041. First capacitor; 042. Second capacitor; 043. First switch; 044. Second switch; 045. Third switch; 046. Fourth switch; 051. Boost module; 052. First inductor; 053. First MOSFET; 054. First diode; 055. First resistor; 056. Second resistor; 057. Third capacitor; 06. Feedback circuit; 061. Third resistor; 062. Fourth resistor; 071. Second inductor; 072. Second MOSFET; 073. Second diode; 074. Fourth capacitor; REF, First reference voltage; REF2, Second reference voltage. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0026] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0027] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0029] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0030] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] This application provides embodiments of a controller, chip, vehicle control system, and vehicle for use in automobiles. Please refer to [link / reference]. Figure 1 and Figure 2 , Figure 1 A circuit including a controller chip provided in an embodiment of this application. Figure 1 , Figure 2 A circuit including a controller chip provided in an embodiment of this application. Figure 2 .

[0032] like Figure 1 and Figure 2As shown, the controller provided in this embodiment is installed in an automotive control system, and the automotive control system includes a linear regulator. Specifically, the controller includes a control circuit 01 and a drive circuit 02. The power supply terminal of the control circuit 01 is connected to the linear regulator, and the first input terminal of the control circuit 01 is connected to the output terminal of the external circuit 03. The second input terminal of the control circuit 01 is connected to a first reference voltage REF. The output terminal of the control circuit 01 is connected to the input terminal of the drive circuit 02, and the output terminal of the drive circuit 02 is connected to the input terminal of the external circuit 03. The control circuit 01 is used to output a control signal to the drive circuit 02 according to the first reference voltage REF and the voltage signal output from the output terminal of the external circuit 03. The drive circuit 02 is used to output a drive signal according to the control signal to drive the external circuit 03 to work.

[0033] In some embodiments, the control circuit 01 may include an amplifier module, a comparator module, and a logic control circuit module connected in sequence. The first input terminal of the amplifier module is connected to the output terminal of the external circuit, serving as the first input terminal of the control circuit 01. The output terminal of the logic control circuit module is connected to the input terminal of the drive circuit 02, serving as the output terminal of the control circuit 01. The amplifier module can compare the voltage signal output by the external circuit 03 with a second voltage signal to monitor the output of the external circuit 03. The comparator module can be used as a pulse width modulation (PWM) generator, and the logic control circuit module can be used to adjust the PWM waveform output by the PWM generator. Thus, the control circuit 01 can output a PWM waveform through the comparator module, receive the voltage signal output by the external circuit 03 through the amplifier module to monitor the output of the external circuit 03, and if the output of the external circuit 03 does not reach the target voltage value, the logic control circuit module adjusts the PWM waveform output by the comparator module. The target voltage value is the voltage signal output by the external circuit 03 to match the electronic components connected to it.

[0034] In some embodiments, the controller may further include a feedback circuit 06, which is connected between the first input terminal of the control circuit 01 and the output terminal of the external circuit 03. Thus, the first input terminal of the control circuit 01 is connected to the output terminal of the external circuit 03 via the feedback circuit 06, allowing the controller to adjust the voltage signal output by the external circuit 03 in a timely manner when the output of the external circuit 03 fails to reach the target voltage value.

[0035] Specifically, the feedback circuit 06 may include a third resistor 061 and a fourth resistor 062. The first end of the third resistor 061 is connected to the output terminal of the external circuit 03, the second end of the third resistor 061 is connected to the first end of the fourth resistor 062 and the first input terminal of the control circuit 01, and the second end of the fourth resistor 062 is grounded.

[0036] It should be noted that, in practical applications, the resistance values ​​of the third resistor 061 and the fourth resistor 062 can be set with reference to the first reference voltage REF and the voltage value of the voltage signal output from the output terminal of the external circuit 03.

[0037] It should also be noted that the feedback circuit 06 can be equipped with three or more resistors as needed. Those skilled in the art can determine how the feedback circuit 06, which includes three or more resistors, is connected between the first input terminal of the control circuit 01 and the output terminal of the external circuit 03, based on the actual situation. This embodiment does not limit this.

[0038] In this embodiment, the control circuit 01 outputs a control signal to the drive circuit 02 based on the first reference voltage and the voltage signal output from the output terminal of the external circuit 03. The drive circuit 02 outputs a drive signal based on the control signal to drive the external circuit 03. While the controller performs the function of driving the external circuit 03, the power supply terminal of the control circuit 01 is connected to the linear regulator in the vehicle control system. In this way, the linear regulator can provide a lower voltage input to the power supply terminal of the control circuit 01. The control circuit 01 only needs low-voltage components to match the voltage input to the power supply terminal, thus reducing the area of ​​the control circuit 01 and the number of mask layers.

[0039] In some embodiments, the controller further includes a voltage conversion circuit 04, the input of which is connected to a linear regulator, and the output of which is connected to a drive circuit 02. The voltage conversion circuit 04 is used to convert the voltage of the linear regulator into the power supply voltage of the drive circuit 02.

[0040] Thus, the output voltage of the linear regulator can be converted into a suitable supply voltage for the drive circuit 02 via the voltage conversion circuit 04, so that the drive circuit 02 can output a drive signal. In this way, the control circuit 01 and the drive circuit 02 can share a single linear regulator, making the internal structure of the controller simpler.

[0041] For example, refer to Figure 1 The voltage conversion circuit 04 can be a charge pump circuit. For example, the charge pump circuit may include a first capacitor 041, a second capacitor 042, a first switch 043, a second switch 044, a third switch 045, and a fourth switch 046.

[0042] In this circuit, the first terminal of the first switch 043 and the first terminal of the second switch 044 are both connected to the linear regulator. The second terminal of the first switch 043 is connected to the first terminal of the first capacitor 041 and the first terminal of the third switch 045, respectively. The second terminal of the third switch 045 and the first terminal of the second capacitor 042 are both grounded. The second terminal of the second switch 044 is connected to the second terminal of the first capacitor 041 and the first terminal of the fourth switch 046, respectively. The second terminal of the fourth switch 046, after being connected to the second terminal of the second capacitor 042, serves as the output terminal of the voltage conversion circuit 04 and is connected to the drive circuit 03.

[0043] In practical applications, to ensure that the output voltage of the voltage conversion circuit 04 matches the supply voltage of the drive circuit 02, the voltage range provided by the linear regulator in this embodiment can be 4V-5.5V. Thus, assuming that the voltage conversion circuit 04 is a charge pump circuit and the voltage provided by the linear regulator is 5V, the charge pump circuit can convert the 5V voltage to 10V to match the supply voltage of the drive circuit 02.

[0044] For example, this application also provides a circuit diagram of another voltage conversion circuit 04, see reference. Figure 2 The voltage conversion circuit 04 includes: a boost module 051, a first inductor 052, a first MOSFET 053, a first diode 054, a first resistor 055, a second resistor 056, and a third capacitor 057. The power supply terminal of the boost module 051 is connected to the output terminal of the linear regulator. The first input terminal of the boost module 051 is connected to the second reference voltage REF2. The output terminal of the boost module 051 is connected to the gate of the first MOSFET 053, and the source of the first MOSFET 053 is grounded. The first terminal of the first inductor 052 is connected to the linear regulator. The second terminal of the first inductor 052 is connected to the drain of the first MOSFET 053 and the anode of the first diode 054. The cathode of the first diode 054 is connected to the first terminal of the first resistor 055 and the first terminal of the third capacitor 057, and the second terminal of the third capacitor 057 is grounded. The second terminal of the first resistor 055 is connected to the first terminal of the second resistor 056 and the second input terminal of the boost module 051, and the second terminal of the second resistor 056 is grounded. The connection point between the cathode of the first diode 054 and the first end of the first resistor 055 serves as the output terminal of the voltage conversion circuit 04 and is connected to the driving circuit 02.

[0045] Another aspect of this application embodiment provides a chip for automobiles, see reference. Figure 1 and Figure 2The chip includes an external circuit 03 and a controller provided in the first aspect of the embodiments of this application. The external circuit 03 includes a second inductor 071, a second MOSFET 072, a second diode 073, and a fourth capacitor 074. The first terminal of the second inductor 071 is connected to the automotive battery, and the second terminal of the second inductor 071 is connected to the drain of the second MOSFET 072 and the anode of the second diode 073. The gate of the second MOSFET 072 serves as the input terminal of the external circuit 03 and is connected to the output terminal of the drive circuit 02 of the controller; the source of the second MOSFET 072 is grounded. The cathode of the second diode 073 is connected to the first terminal of the fourth capacitor 074, the second terminal of the fourth capacitor 074 is grounded, and the cathode of the second diode 073 serves as the output terminal of the external circuit 03.

[0046] In practical applications, the drive signal is a PWM square wave. When the drive signal voltage is 10V, the second MOSFET 072 turns on, and the second inductor 071 stores energy. When the drive signal voltage is 0V, the second MOSFET 072 turns off, the second inductor 071 releases its stored energy, the second diode 073 turns on, and the fourth capacitor 074 stores energy, causing the voltage value of the output signal at the output terminal of the external circuit 03 to increase. When the drive signal voltage is 10V again, the second MOSFET 072 turns on, and the second inductor 071 continues to store energy; when the drive signal voltage is 0V again, the second MOSFET 072 turns off, the second inductor 071 releases its stored energy, the second diode 073 turns on, and the fourth capacitor 074 continues to store energy, causing the voltage value of the output signal at the output terminal of the external circuit 03 to continue to increase. This process is repeated multiple times to continuously increase the voltage value of the signal until the target voltage value is reached. During this process, if the voltage value of the voltage signal exceeds the target voltage value at a certain moment, the control circuit 01 can adjust the duty cycle of the PWM square wave output by the drive circuit 02 in a timely manner through the feedback circuit 06, so as to reduce the voltage value of the voltage signal. Through this adjustment process, the voltage value of the voltage signal output by the output terminal of the external circuit 03 is finally stabilized at the target voltage value.

[0047] Another embodiment of this application provides an automotive control system for automobiles, including the chip provided in the above embodiments. Applying the chip provided in the above embodiments to automobiles can reduce the area occupied by the automotive control system.

[0048] Another embodiment of this application provides an automobile, including the automobile control system provided in the above embodiments.

[0049] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0050] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A controller for an automobile, characterized in that, The vehicle control system includes a linear regulator, and the controller includes a control circuit and a drive circuit. The power supply terminal of the control circuit is connected to the linear regulator; the first input terminal of the control circuit is connected to the output terminal of the external circuit; the second input terminal of the control circuit is connected to the first reference voltage; the output terminal of the control circuit is connected to the input terminal of the drive circuit; and the output terminal of the drive circuit is connected to the input terminal of the external circuit. The control circuit is used to output a control signal to the drive circuit based on the first reference voltage and the voltage signal output from the output terminal of the external circuit. The driving circuit is used to output a driving signal according to the control signal to drive the external circuit to work. The controller further includes: a voltage conversion circuit; The input terminal of the voltage conversion circuit is connected to the linear regulator, and the output terminal of the voltage conversion circuit is connected to the drive circuit. The voltage conversion circuit is used to convert the output voltage of the linear regulator into the power supply voltage of the drive circuit. The control circuit includes: an amplifier module, a comparator module, and a logic control circuit module connected in sequence; The first input terminal of the amplifier module is connected to the output terminal of the external circuit as the first input terminal of the control circuit; the output terminal of the logic control circuit module is connected to the input terminal of the drive circuit as the output terminal of the control circuit. The comparator module is used as a pulse width modulation generator to output a PWM waveform; the logic control circuit module is used to adjust the PWM waveform. The voltage conversion circuit includes: a first capacitor, a second capacitor, a first switch, a second switch, a third switch, and a fourth switch; The first terminal of the first switch and the first terminal of the second switch are both connected to the linear regulator; the second terminal of the first switch is connected to the first terminal of the first capacitor and the first terminal of the third switch; the second terminal of the third switch and the first terminal of the second capacitor are both grounded. The second terminal of the second switch is connected to the second terminal of the first capacitor and the first terminal of the fourth switch, respectively; the second terminal of the fourth switch and the second terminal of the second capacitor are connected together and then serve as the output terminal of the voltage conversion circuit and are connected to the driving circuit.

2. The controller according to claim 1, characterized in that, The voltage conversion circuit includes: a boost module, a first inductor, a first MOSFET, a first diode, a first resistor, a second resistor, and a third capacitor; The power supply terminal of the boost module is connected to the output terminal of the linear regulator. The first input terminal of the boost module is connected to the second reference voltage. The output terminal of the boost module is connected to the gate of the first MOSFET. The source of the first MOSFET is grounded. The first terminal of the first inductor is connected to the linear regulator, and the second terminal of the first inductor is connected to the drain of the first MOSFET and the anode of the first diode. The cathode of the first diode is connected to the first terminal of the first resistor and the first terminal of the third capacitor. The second terminal of the third capacitor is grounded. The second terminal of the first resistor is connected to both the first terminal of the second resistor and the second input terminal of the boost module; the second terminal of the second resistor is grounded. The connection point between the cathode of the first diode and the first end of the first resistor serves as the output terminal of the voltage conversion circuit and is connected to the driving circuit.

3. The controller according to claim 1, characterized in that, The controller further includes a feedback circuit; the feedback circuit is connected between the first input terminal of the control circuit and the output terminal of the external circuit.

4. The controller according to claim 3, characterized in that, The feedback circuit includes a third resistor and a fourth resistor; The first end of the third resistor is connected to the output end of the external circuit, the second end of the third resistor is connected to the first end of the fourth resistor and the first input end of the control circuit, and the second end of the fourth resistor is grounded.

5. A chip for use in automobiles, characterized in that, The chip includes external circuitry and a controller as described in any one of claims 1-4; The external circuit includes a second inductor, a second MOSFET, a second diode, and a fourth capacitor; The first end of the second inductor is connected to the car battery, and the second end of the second inductor is connected to the drain of the second MOSFET and the anode of the second diode, respectively; the gate of the second MOSFET is connected as the input terminal of the external circuit and the output terminal of the controller's drive circuit, and the source of the second MOSFET is grounded; The cathode of the second diode is connected to the first terminal of the fourth capacitor, and the second terminal of the fourth capacitor is grounded; the cathode of the second diode serves as the output terminal of the external circuit.

6. A vehicle control system for automobiles, characterized in that, Includes the chip described in claim 5.

7. A car, characterized in that, Includes the vehicle control system described in claim 6.

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