Controllable power supply system and controllable power supply device of vehicle camera

Abstract

The application provides a controllable power supply system and a controllable power supply device of a vehicle-grade camera. The controllable power supply system comprises a master control module, a power supply module, a first controllable module and a second controllable module. The master control module is used for controlling the start of the power supply module, the first controllable module and the second controllable module, and performing fault diagnosis on the power supply module. The first controllable module is used for adjusting the first output voltage of the power supply module. The second controllable module is used for adjusting the second output voltage of the power supply module. In the case of detecting unstable input voltage, the first controllable module and the second controllable module are started by the master control module, the voltage division structure in the first controllable module and the second controllable module is changed, the output voltage of the power supply module is dynamically adapted, the purpose of adjusting the output voltage is achieved, the technical effect of stable output is realized, the power supply demand of the vehicle-grade camera is met, the power supply efficiency is optimized, the power loss is reduced, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power control technology, specifically to a controllable power supply system and a controllable power supply device for an automotive-grade camera. Background Technology

[0002] With the rapid development of automotive intelligence, automotive-grade cameras play a crucial role in many functions such as Advanced Driver Assistance Systems (ADAS), dashcams, and panoramic parking. Automotive-grade cameras have stringent requirements for power supply. They not only need stable and reliable power to ensure normal operation in complex driving environments, such as handling voltage fluctuations during vehicle start-up and driving, and different temperature conditions, but also require precise controllability to meet the needs of automotive-grade cameras to adapt to different voltage requirements.

[0003] However, most current automotive-grade cameras are powered by a power chip that provides a fixed output voltage. At the same time, an external high-side switch with diagnostic functions is required to detect whether there is an open circuit or short circuit in the voltage of the automotive-grade camera. This makes the circuit cost too high and the testing process complicated. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a controllable power supply system and a controllable power supply device for automotive-grade cameras.

[0005] In a first aspect, embodiments of this application provide a controllable power supply system for use in automotive-grade cameras, comprising: a main control module, a power supply module, a first controllable module, and a second controllable module; the first output terminal of the main control module is connected to the first input terminal of the power supply module, the second output terminal of the main control module is connected to the second input terminal of the power supply module, the third output terminal of the main control module is connected to the input terminals of the first and second controllable modules, the first input terminal of the main control module is connected to the first output terminal of the power supply module, the second input terminal of the main control module is connected to the second output terminal of the power supply module, and the third input terminal of the main control module is connected to the... The third output terminal of the power module is connected, and the fourth input terminal of the main control module is connected to the fourth output terminal of the power module. The main control module is used to control the startup of the power module, the first controllable module, and the second controllable module, and to perform fault diagnosis on the power module. The output terminal of the first controllable module is connected to the third input terminal and the third output terminal of the power module, and the first controllable module is used to adjust the first output voltage of the power module. The output terminal of the second controllable module is connected to the fourth input terminal and the fourth output terminal of the power module, and the second controllable module is used to adjust the second output voltage of the power module.

[0006] In conjunction with the first aspect, the main control module includes: a first main control chip and a second main control chip; the fourteenth pin of the first main control chip serves as the third output terminal of the main control module and is connected to the input terminals of the first controllable module and the second controllable module; the twenty-first pin of the first main control chip serves as the second output terminal of the main control module and is connected to the second input terminal of the power supply module; the twenty-fourth pin of the first main control chip serves as the first output terminal of the main control module and is connected to the first input terminal of the power supply module; the first main control chip is used to control the startup of the power supply module, the first controllable module, and the second controllable module; the sixteenth pin of the second main control chip serves as the first input terminal of the main control module and is connected to the first output terminal of the power supply module; the fifteenth pin of the second main control chip serves as the second input terminal of the main control module and is connected to the second output terminal of the power supply module; the eleventh pin of the second main control chip serves as the fourth input terminal of the main control module and is connected to the fourth output terminal of the power supply module; the ninth pin of the second main control chip serves as the third input terminal of the main control module and is connected to the third output terminal of the power supply module; the second main control chip is used to perform fault diagnosis on the power supply module.

[0007] In conjunction with the first aspect, the power module includes: a power chip; a first pin of the power chip is connected to an external power output terminal; a fifth pin of the power chip serves as the first output terminal of the power module and is connected to the sixteenth pin of the second main control chip; a sixth pin of the power chip serves as the second output terminal of the power module and is connected to the fifteenth pin of the second main control chip; a second pin of the power chip serves as the first input terminal of the power module and is connected to the twenty-fourth pin of the first main control chip; a third pin of the power chip serves as the second input terminal of the power module and is connected to the twenty-first pin of the first main control chip; a thirteenth pin of the power chip serves as the fourth input terminal of the power module and is connected to the output terminal of the second controllable module; a fourteenth pin of the power chip serves as the fourth output terminal of the power module and is connected to the output terminal of the second controllable module and the eleventh pin of the second main control chip; a fifteenth pin of the power chip serves as the third input terminal of the power module and is connected to the output terminal of the first controllable module; and a sixteenth pin of the power chip serves as the third output terminal of the power module and is connected to the ninth pin of the second main control chip.

[0008] In conjunction with the first aspect, the first controllable module includes: a first transistor, a first voltage divider resistor, a second voltage divider resistor, a first resistor, and a second resistor; the control terminal of the first transistor is connected to one end of the first resistor and one end of the second resistor; the first end of the first transistor and the other end of the first resistor are connected to a ground terminal; the second end of the first transistor is connected to one end of the first voltage divider resistor and one end of the second voltage divider resistor; the other end of the first voltage divider resistor serves as the output terminal of the first controllable module and is connected to the fifteenth pin of the power supply chip; the other end of the second voltage divider resistor is connected to a ground terminal; and the other end of the second resistor serves as the input terminal of the first controllable module and is connected to the fourteenth pin of the first main control chip.

[0009] In conjunction with the first aspect, the second controllable module includes: a second transistor, a third voltage divider resistor, a fourth voltage divider resistor, a third resistor, and a fourth resistor; the control terminal of the second transistor is connected to one end of the third resistor and one end of the fourth resistor; the first terminal of the second transistor is connected to the other end of the third resistor and grounded; the second terminal of the second transistor is connected to one end of the third voltage divider resistor and one end of the fourth voltage divider resistor; the other end of the third voltage divider resistor serves as the output terminal of the second controllable module and is connected to the thirteenth pin of the power supply chip; the other end of the fourth voltage divider resistor is connected to grounded; and the other end of the fourth resistor serves as the input terminal of the second controllable module and is connected to the fourteenth pin of the first main control chip.

[0010] In conjunction with the first aspect, the first controllable module includes: a first transistor, a fifth voltage divider resistor, a sixth voltage divider resistor, a fifth resistor, and a sixth resistor; the base of the first transistor is connected to one end of the fifth resistor and one end of the sixth resistor, the emitter of the first transistor is connected to the other end of the fifth resistor and ground, and the collector of the first transistor is connected to one end of the fifth voltage divider resistor and one end of the sixth voltage divider resistor; the other end of the fifth voltage divider resistor serves as the output terminal of the first controllable module and is connected to the fifteenth pin of the power supply chip; the other end of the sixth voltage divider resistor is connected to the ground; and the other end of the sixth resistor serves as the input terminal of the first controllable module and is connected to the fourteenth pin of the first main control chip.

[0011] In conjunction with the first aspect, the second controllable module includes: a second transistor, a seventh voltage divider resistor, an eighth voltage divider resistor, a seventh resistor, and an eighth resistor; the base of the second transistor is connected to one end of the seventh resistor and one end of the eighth resistor, the emitter of the second transistor is connected to the other end of the seventh resistor and ground, and the collector of the second transistor is connected to one end of the seventh voltage divider resistor and one end of the eighth voltage divider resistor; the other end of the seventh voltage divider resistor serves as the output terminal of the second controllable module and is connected to the thirteenth pin of the power supply chip; the other end of the eighth voltage divider resistor is connected to the ground; and the other end of the eighth resistor serves as the input terminal of the second controllable module and is connected to the fourteenth pin of the first main control chip.

[0012] In conjunction with the first aspect, the controllable power supply system further includes: a first diagnostic module and a second diagnostic module; the first input terminal of the first diagnostic module is connected to the sixth pin of the power chip, the second input terminal of the first diagnostic module is connected to the fifth pin of the power chip, the first output terminal of the first diagnostic module is connected to the fifteenth pin of the second main control chip, and the second output terminal of the first diagnostic module is connected to the sixteenth pin of the second main control chip, and the first diagnostic module is used to perform short-circuit diagnosis on the power module; the first input terminal of the second diagnostic module is connected to the sixteenth pin of the power chip, the second input terminal of the second diagnostic module is connected to the fourteenth pin of the power chip, the third input terminal of the second diagnostic module is connected to the system power output terminal, the first output terminal of the second diagnostic module is connected to the ninth pin of the second main control chip, the second output terminal of the second diagnostic module is connected to the eleventh pin of the second main control chip, and the third output terminal of the second diagnostic module is connected to the second pin of the second main control chip, and the second diagnostic module is used to perform open-circuit diagnosis on the power module.

[0013] In conjunction with the first aspect, the first diagnostic module includes: a first capacitor, a second capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor; the second diagnostic module includes: a third capacitor, a fourth capacitor, a fifth capacitor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and an eighteenth resistor; one end of the ninth resistor serves as the first input terminal of the first diagnostic module and is connected to the sixth pin of the power supply chip; the other end of the ninth resistor serves as the first output terminal of the first diagnostic module and is connected to one end of the tenth resistor, one end of the first capacitor, and the fifteenth pin of the second main control chip; the other end of the tenth resistor, along with the other end of the first capacitor, one end of the twelfth resistor, and one end of the second capacitor, is connected to a ground terminal; one end of the eleventh resistor serves as the second input terminal of the first diagnostic module and is connected to the fifth pin of the power supply chip; the other end of the eleventh resistor serves as the second output terminal of the first diagnostic module and is connected to the other end of the twelfth resistor, the other end of the second capacitor, and the sixteenth pin of the second main control chip; one end of the thirteenth resistor serves as... The first input terminal of the second diagnostic module is connected to the sixteenth pin of the power chip. The other end of the thirteenth resistor serves as the first output terminal of the second diagnostic module and is connected to one end of the fourteenth resistor, one end of the third capacitor, and the ninth pin of the second main control chip. The other end of the fourteenth resistor, along with the other end of the third capacitor, one end of the sixteenth resistor, one end of the fourth capacitor, one end of the eighteenth resistor, and one end of the fifth capacitor, is connected to the ground terminal. One end of the fifteenth resistor serves as the second input terminal of the second diagnostic module and is connected to the fourteenth pin of the power chip. The other end of the fifteenth resistor serves as the second output terminal of the second diagnostic module and is connected to the other end of the sixteenth resistor, the other end of the fourth capacitor, and the eleventh pin of the second main control chip. One end of the seventeenth resistor serves as the third input terminal of the second diagnostic module and is connected to the system power output terminal. The other end of the seventeenth resistor serves as the third output terminal of the second diagnostic module and is connected to the other end of the eighteenth resistor, the other end of the fifth capacitor, and the second pin of the second main control chip.

[0014] Secondly, embodiments of this application provide a controllable power supply device for an automotive-grade camera, comprising: an automotive-grade camera and a controllable power supply system as described in any of the first aspects, wherein the controllable power supply system is connected to the automotive-grade camera.

[0015] This application provides a controllable power supply system for automotive-grade cameras. It comprises a main control module, a power supply module, a first controllable module, and a second controllable module. The first output terminal of the main control module is connected to the first input terminal of the power supply module, the second output terminal of the main control module is connected to the second input terminal of the power supply module, the third output terminal of the main control module is connected to the input terminals of both the first and second controllable modules, the first input terminal of the main control module is connected to the first output terminal of the power supply module, the second input terminal of the main control module is connected to the second output terminal of the power supply module, and the third input terminal of the main control module is connected to the power supply module. The third output terminal of the main control module is connected to the third input terminal of the power module, and the fourth input terminal of the main control module is connected to the fourth output terminal of the power module. The main control module is used to control the startup of the power module, the first controllable module, and the second controllable module, and to perform fault diagnosis on the power module. The output terminal of the first controllable module is connected to the third input terminal and the third output terminal of the power module, and the first controllable module is used to adjust the first output voltage of the power module. The output terminal of the second controllable module is connected to the fourth input terminal and the fourth output terminal of the power module, and the second controllable module is used to adjust the second output voltage of the power module. When an unstable input voltage is detected, the main control module controls the startup of the first and second controllable modules, changes the voltage divider structure within the first and second controllable modules, dynamically adapts to the output voltage of the power module, achieves the purpose of adjusting the output voltage, and realizes the technical effect of stable output. While meeting the power supply requirements of automotive-grade cameras, it optimizes power efficiency, reduces power loss, and lowers costs. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0017] Figure 1 This is a schematic diagram of a controllable power supply system provided in Embodiment 1 of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a main control module provided in Embodiment 2 of this application;

[0019] Figure 3 This is a schematic diagram of another main control module provided in Embodiment 2 of this application;

[0020] Figure 4 This is a schematic diagram of the structure of a power module provided in Embodiment 3 of this application;

[0021] Figure 5a This is a schematic diagram of the structure of a first controllable module provided in Embodiment 4 of this application;

[0022] Figure 5b This is a schematic diagram of another first controllable module provided in Embodiment 4 of this application;

[0023] Figure 6a This is a schematic diagram of the structure of a second controllable module provided in Embodiment 5 of this application;

[0024] Figure 6b This is a schematic diagram of another second controllable module provided in Embodiment 5 of this application;

[0025] Figure 7a This is a schematic diagram of the structure of a first diagnostic module provided in Embodiment Six of this application;

[0026] Figure 7b This is a schematic diagram of another first diagnostic module provided in Embodiment Six of this application;

[0027] Figure 8a This is a schematic diagram of the structure of a second diagnostic module provided in Embodiment 7 of this application;

[0028] Figure 8b This is a schematic diagram of another second diagnostic module provided in Embodiment 7 of this application;

[0029] Figure 9 This is a schematic diagram of the structure of a controllable power supply device for an automotive-grade camera, provided in Embodiment 8 of this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model application clearer, the technical solutions in the embodiments of this utility model application will be clearly and completely described below in conjunction with the embodiments of this utility model application. Obviously, the described embodiments are only a part of the embodiments of this utility model application, not all of them. Based on the embodiments of this utility model application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Currently, the power supply voltage for automotive-grade cameras is fixed at 7V, 10V, or 12V. Using a BUCK-BOOST circuit, or a separate BUCK circuit or BOOST circuit, the power supply voltage flexibility is insufficient, leading to inadequate voltage adaptability for automotive-grade cameras, low power efficiency, and poor heat dissipation for the power chip. Furthermore, an external high-side switch is required to detect open or short circuits in the automotive-grade camera's voltage. This results in excessive hardware costs and consumes too much PCB space.

[0032] To address the aforementioned issues, this application proposes a controllable power supply system. By adding a first controllable module and a second controllable module, upon detecting input voltage fluctuations, the main control module controls the internal voltage divider structure of the first and second controllable modules, thereby altering the output voltage of the power supply module. This achieves intelligent adaptive output voltage. Based on the voltage required by the automotive-grade camera, the main control module adjusts the internal voltage divider resistors of the first and second controllable modules to output different voltages. This solves the problem of varying voltage requirements for automotive-grade cameras. It simplifies cost requirements, reduces the need for complex circuitry (power supply voltage + high-voltage switch) compared to traditional circuitry, and allows the power supply module to self-diagnose short circuits or open circuits, reducing debugging and equipment failures caused by complex circuitry, lowering after-sales costs, significantly improving product cost-effectiveness, and saving costs.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of a controllable power supply system provided in Embodiment 1 of this application. According to... Figure 1 The provided diagram shows that the structure of the controllable power supply system 100 specifically includes:

[0035] Main control module 10, power supply module 20, first controllable module 30 and second controllable module 40.

[0036] The first output terminal of the main control module 10 is connected to the first input terminal of the power module 20, the second output terminal of the main control module 10 is connected to the second input terminal of the power module 20, the third output terminal of the main control module 10 is connected to the input terminal of the first controllable module 30 and the input terminal of the second controllable module 40, the first input terminal of the main control module 10 is connected to the first output terminal of the power module 20, the second input terminal of the main control module 10 is connected to the second output terminal of the power module 20, the third input terminal of the main control module 10 is connected to the third output terminal of the power module 20, and the fourth input terminal of the main control module 10 is connected to the fourth output terminal of the power module 20. The main control module 10 is used to control the start-up of the power module 20, the first controllable module 30 and the second controllable module 40, and to perform fault diagnosis on the power module 20.

[0037] The output terminal of the first controllable module 30 is connected to the third input terminal and the third output terminal of the power module 20. The first controllable module 30 is used to adjust the first output voltage of the power module 20.

[0038] The output terminal of the second controllable module 40 is connected to the fourth input terminal and the fourth output terminal of the power module 20. The second controllable module 40 is used to adjust the second output voltage of the power module 20.

[0039] according to Figure 1 The provided diagram illustrates that when the power module input voltage is unstable, the main control module outputs a start signal to activate both the first and second controllable modules. This alters the internal voltage divider of the first controllable module, thereby changing the output voltage at the third output terminal of the power module and regulating its first output voltage. Similarly, the main control module controls the internal voltage divider of the second controllable module, changing the output voltage at the fourth output terminal and regulating its second output voltage. This process adapts the power module's output voltage, improving its stability. Furthermore, connecting the power module's first and second output terminals to the main control module enables short-circuit self-testing, saving hardware costs.

[0040] Furthermore, in a controlled example scenario, according to Figure 1 The diagram provided shows that the structure of the controllable power supply system also includes: a filter module 50 and a battery 60.

[0041] The output terminal of the storage battery 60 is connected to the input terminal of the filter module 50 and the fifth input terminal of the power module 20.

[0042] The output of the filter module 50 is connected to the fifth input of the main control module 10.

[0043] The battery 60 supplies power to the internal power module, and after being filtered by the filter module 50, the battery 60 provides a stable power signal to the main control module 10.

[0044] This application provides a controllable power supply system comprising a main control module, a power supply module, a first controllable module, and a second controllable module. The first output terminal of the main control module is connected to the first input terminal of the power supply module; the second output terminal of the main control module is connected to the second input terminal of the power supply module; the third output terminal of the main control module is connected to the input terminals of both the first and second controllable modules; the first input terminal of the main control module is connected to the first output terminal of the power supply module; the second input terminal of the main control module is connected to the second output terminal of the power supply module; the third input terminal of the main control module is connected to the third output terminal of the power supply module; and the fourth input terminal of the main control module is connected to the fourth output terminal of the power supply module. The main control module is used to control the startup of the power supply module, the first controllable module, and the second controllable module, and to perform fault diagnosis on the power supply module. The output terminal of the first controllable module is connected to the third input terminal and the third output terminal of the power supply module, and is used to adjust the first output voltage of the power supply module. The output terminal of the second controllable module is connected to the fourth input terminal and the fourth output terminal of the power supply module, and is used to adjust the second output voltage of the power supply module. When an unstable input voltage is detected, the main control module controls the first and second controllable modules to start, changing the voltage divider structure within the first and second controllable modules to dynamically adapt to the output voltage of the power supply module, thereby achieving the purpose of regulating the output voltage and realizing the technical effect of stable output. This optimizes power efficiency, reduces energy loss, and lowers costs while meeting the power supply requirements of automotive-grade cameras.

[0045] Example 2

[0046] Figure 2 This is a schematic diagram of the structure of a main control module provided in Embodiment 2 of this application. Figure 2 This is based on the previous embodiment. Figure 2 The provided diagram shows that the main control module 10 in the controllable power supply system 100 specifically includes the following structures:

[0047] The first main control chip is U37E.

[0048] The fourteenth pin H2 of the first main control chip U37E serves as the third output terminal of the main control module 10 and is connected to the input terminal of the first controllable module 30 and the second controllable module 40. The twenty-first pin L3 of the first main control chip U37E serves as the second output terminal of the main control module 10 and is connected to the second input terminal of the power module 20. The twenty-fourth pin K2 of the first main control chip U37E serves as the first output terminal of the main control module 10 and is connected to the first input terminal of the power module 20. The first main control chip U37E is used to control the startup of the power module 20, the first controllable module 30 and the second controllable module 40.

[0049] Optionally, according to Figure 2The provided diagram shows that the main control module also includes a sixth capacitor, C6.

[0050] One end of the sixth capacitor C6 is connected to pin 17 G6 of the first main control chip U37E and the power output terminal VCC_3V3_M. The other end of the sixth capacitor C6 is connected to the ground terminal DGND. The sixth capacitor C6 filters the electrical signal input to the first main control chip U37E.

[0051] The first control chip U37E is connected to the first controllable module 30 and the second controllable module 40 through its pins. When unstable voltage fluctuations are detected at the input terminal of the power module 20, the first control chip U37E outputs the VCAM_SEL signal through its fourteenth pin H2 to start the operation of the first controllable module 30 and the second controllable module 40. By adjusting the internal voltage divider of the first controllable module 30 or the second controllable module 40, the output voltage of the power module 20 can be adjusted.

[0052] In one possible example scenario, Figure 3 This is a schematic diagram of another main control module provided in Embodiment 2 of this application. Figure 3 This description is based on the previous embodiment. Figure 3 The provided diagram shows that the main control module 10 includes: a second main control chip U37C.

[0053] Pin 16 U8 of the second main control chip U37C is connected to the first input terminal of the main control module 10 and the first output terminal of the power module 20. Pin 15 R7 of the second main control chip U37C is connected to the second input terminal of the main control module 10 and the second output terminal of the power module 20. Pin 11 P7 of the second main control chip U37C is connected to the fourth input terminal of the main control module 10 and the fourth output terminal of the power module 20. Pin 9 V5 of the second main control chip U37C is connected to the third input terminal of the main control module 10 and the third output terminal of the power module 20. The second main control chip U37C is used to diagnose faults in the power module 20.

[0054] Optionally, according to Figure 3 The provided diagram shows that the main control module also includes a seventh capacitor, C7.

[0055] One end of the seventh capacitor C7 is connected to the seventeenth pin N8 of the second main control chip U37C and the power output terminal VCC_3V3_M. The other end of the seventh capacitor C7 is connected to the ground terminal DGND. The seventh capacitor C7 filters the electrical signal input to the second main control chip U37C.

[0056] according to Figure 3The provided diagram shows that the power module self-tests and feeds back the detected results to the second main control chip, thereby enabling fault diagnosis of whether the power module has a short circuit or open circuit, reducing production costs by eliminating the need for external hardware structures.

[0057] Example 3

[0058] Figure 4 This is a schematic diagram of a power module provided in Embodiment 3 of this application. Figure 4 This is based on the previous embodiment. Figure 4 The provided diagram shows that the power module 20 includes a power chip U23.

[0059] Pin 1 of power chip U23 is connected to the output of external power supply VCC_12V. Pin 5 of power chip U23 serves as the first output of power module 20 and is connected to pin 16 U8 of the second main control chip U37C. Pin 6 of power chip U23 serves as the second output of power module 20 and is connected to pin 15 R7 of the second main control chip U37C. Pin 2 of power chip U23 serves as the first input of power module 20 and is connected to pin 24 K2 of the first main control chip U37E. Pin 3 of power chip U23 serves as the second input of power module 20 and is connected to pin 24 K2 of the first main control chip U37E. Pin 21 L3 of E is connected; pin 13 of power chip U23 is connected as the fourth input terminal of power module 20 and the output terminal of second controllable module 40; pin 14 of power chip U23 is connected as the fourth output terminal of power module 20 and the output terminal of second controllable module 40 and pin 11 P7 of second main control chip U37C; pin 15 of power chip U23 is connected as the third input terminal of power module 20 and the output terminal of first controllable module 30; pin 16 of power chip U23 is connected as the third output terminal of power module 20 and the ninth pin V5 of second main control chip U37C.

[0060] Figure 4 The TP markings (i.e., TP161 to TP183) represent multiple detection points. The external power supply VCC_12V, as mentioned here, passes through a common-mode inductor (not shown in the figure) to obtain the system power supply SYS_12V.

[0061] The second and third pins of the power chip U23 are used as enable terminals to connect to the first main control chip U37E. The power chip is started by the CAM_P_PEN signal output from the twenty-first pin and the CAM_D_PEN signal output from the twenty-fourth pin of the first main control chip U37E.

[0062] The power chip U23 is connected to the second main control chip U37C via its fifth and sixth pins as detection terminals. The diagnostic detection of the power chip is initiated by the V_SENSE_D_T signal output from the sixteenth pin and the V_SENSE_P_T signal output from the fifteenth pin of the second main control chip U37C.

[0063] The power chip receives an internal fixed electrical signal FB2 (a fixed value, e.g., 1.233V) through its thirteenth pin and an internal fixed electrical signal FB1 (a fixed value, e.g., 1.233V) through its fifteenth pin. The power chip also receives a VCC_12V signal through its input terminal. After processing and voltage division by FB1 and EB2, the first output voltage of the power chip's sixteenth pin and the second output voltage of its fourteenth pin are dynamically adjusted, thereby adapting the power chip's output voltage.

[0064] In one possible scenario, when the power supply chip receives a 12V electrical signal, and the input signal is stable, neither the first nor the second controllable module is activated. Through the internal voltage divider structure of the power supply chip, the output voltage can be obtained as 7V, i.e., V. OUT1 =7V, V OUT2 =7V. Due to the instability of the electrical signal, the first main control chip controls the first and second controllable modules to enter adjustment mode. While ensuring that the input voltages of FB1 and FB2 are a fixed value of 1.233V, the adjustment is achieved through V... out1 +V FB1 =12V, and V out2 +V FB2 =12V, from which we can deduce that V out1 =10.77V, V out2 =10.77V. Compared to the original output voltage of 7V, the output voltage value can be significantly improved, ensuring that the power chip's output voltage is dynamically adjusted according to fluctuations in the input voltage.

[0065] Optionally, according to Figure 4The provided diagram shows that the power module structure also includes: resistor RR19 (19th), resistor RR20 (20th), resistor RR21 (21st), resistor RR22 (22nd), resistor RR23 (23rd), resistor RR24 (24th), resistor RR25 (25th), resistor RR26 (26th), resistor RR27 (27th), resistor RR28 (28th), resistor RR29 (29th), resistor RR30 (30th), resistor RR31 (31st), resistor RR32 (32nd), resistor RR33 (33rd), resistor RR34 (34th), resistor RR35 (35th), capacitor C8 (8th), capacitor C9 (9th), capacitor C10 (10th), capacitor C11 (11th), capacitor C12 (12th), capacitor C13 (13th), and capacitor C14 (14th).

[0066] One end of the nineteenth resistor RR19 is connected to the output terminal of the external power supply VCC_12V. The other end of the nineteenth resistor RR19 is connected to one end of the eighth capacitor C8, one end of the ninth capacitor C9, and the first pin of the power chip U23. The other end of the eighth capacitor C8, the other end of the ninth capacitor C9, and one end of the tenth capacitor C10 are connected to the ground terminal DGND. The other end of the tenth capacitor C10 is connected to the fourth pin of the power chip U23.

[0067] One end of the twentieth resistor RR20 serves as the first output terminal of the power module 20 and is connected to the sixteenth pin U8 of the second main control chip U37C. The other end of the twentieth resistor RR20 is connected to one end of the twenty-first resistor RR21, one end of the eleventh capacitor C11, and the fifth pin of the power chip U23. The other end of the twenty-first resistor RR21 is connected to one end of the twenty-second resistor RR22 and to the ground terminal. The other end of the eleventh capacitor C11 is connected to one end of the twelfth capacitor C12 and to the ground terminal. The other end of the twelfth capacitor C12 is connected to the other end of the twenty-second resistor RR22, one end of the twenty-third resistor RR23, and the sixth pin of the power chip U23. The other end of the twenty-third resistor RR23 is connected to the fifteenth pin R7 of the second main control chip U37C.

[0068] One end of the twenty-fourth resistor RR24 is connected to pin V5 of the ninth pin of the second main control chip U37C, and the other end of the twenty-fourth resistor RR24 is connected to pin 2 of the power supply chip U23.

[0069] One end of the 25th resistor RR25 is connected to pin 11 P7 of the second main control chip U37C, and the other end of the 25th resistor RR25 is connected to pin 3 of the power chip U23.

[0070] One end of the twenty-sixth resistor RR26 is connected to the power output terminal VCC_3V3_M, and the other end of the twenty-sixth resistor RR26 is connected to pin 9 of the power chip U23 and one end of the twenty-seventh resistor RR27. The other end of the twenty-seventh resistor RR27 is connected to the external pin VCAMD / P.

[0071] One end of the 28th resistor RR28, one end of the 29th resistor RR29, one end of the 30th resistor RR30, and one end of the 31st resistor RR31 are connected to the ground terminal. The other end of the 28th resistor RR28 is connected to the 8th pin of the power chip U23. The other end of the 29th resistor RR29 is connected to the 7th pin of the power chip U23. The other end of the 30th resistor RR30 is connected to the 10th pin of the power chip U23. The other end of the 31st resistor RR31 is connected to the 11th pin of the power chip U23.

[0072] One end of the thirteenth capacitor C13 is connected to the sixteenth pin of the power chip U23, one end of the thirty-second resistor RR32, and one end of the thirty-third resistor R33. The other end of the thirteenth capacitor C13 is connected to the ground terminal. The other end of the thirty-second resistor RR32 serves as the third output terminal of the power chip U23, outputting the first output voltage VCC_CAM_D. The other end of the thirty-third resistor RR32 is connected to the fifteenth pin of the power chip U23 and the output terminal of the first controllable module 30.

[0073] One end of the fourteenth capacitor C14 is connected to the fourteenth pin of the power chip U23, one end of the thirty-fourth resistor RR34, and one end of the thirty-fifth resistor RR35. The other end of the fourteenth capacitor C14 is connected to the ground terminal. The other end of the thirty-fourth resistor RR34 serves as the fourth output terminal of the power chip U23, outputting the second output voltage VCC_CAM_P. The other end of the thirty-fifth resistor RR35 is connected to the thirteenth pin of the power chip U23 and the output terminal of the second controllable module 40.

[0074] according to Figure 4 The provided diagram shows that multiple RC structures are formed by the voltage division protection of resistors and the filtering of capacitors to filter the input and output signals of the power supply chip, thereby further stabilizing the input and output signals of the power supply chip.

[0075] Example 4

[0076] Figure 5a This is a schematic diagram of the structure of a first controllable module provided in Embodiment 4 of this application. Figure 5a This is based on the previous embodiment. Figure 5aThe provided diagram shows that the first controllable module 30 includes: a first transistor Q1, a first voltage divider resistor FR1, a second voltage divider resistor FR2, a first resistor RR1, and a second resistor RR2.

[0077] The control terminal of the first transistor Q1 is connected to one end of the first resistor RR1 and one end of the second resistor RR2. The first terminal of the first transistor Q1 and the other end of the first resistor RR1 are connected to the ground terminal. The second terminal of the first transistor Q1 is connected to one end of the first voltage divider resistor FR1 and one end of the second voltage divider resistor FR2.

[0078] The other end of the first voltage divider resistor FR1 is connected to the fifteenth pin of the power chip U23 as the output terminal of the first controllable module 30.

[0079] The other end of the second voltage divider resistor FR2 is connected to the ground terminal.

[0080] The other end of the second resistor RR2 is connected to the fourteenth pin H2 of the first controllable module 30 as the input terminal.

[0081] The resistance value of the voltage divider resistor is modified according to the circuit requirements, and is not the focus of protection here, so it will not be elaborated further. The first transistor can be understood as a device with switching function, such as an NMOS transistor or a PMOS transistor. This application uses an NMOS transistor for illustration.

[0082] The first controllable module has the following functions:

[0083] (I) Function of stabilizing the output voltage of OUT1 pin

[0084] according to Figure 5a The provided diagram shows that when the first main control chip detects a stable 12V input voltage signal, it controls pin fourteen (i.e., the GPIO port) to remain inactive. This causes transistor Q1 to be off under the influence of a low-level VCAM_SEL signal, connecting both the first and second voltage divider resistors FR1 and FR2 to pin fifteen of the power supply chip. With a fixed voltage division at FB1 (1.233V), the output voltage of pin OUT1 is 10.767V. When the input voltage is detected to be below 12V, the high-level VCAM_SEL signal output by the first main control chip U37E turns on transistor Q1, directly grounding the first voltage divider resistor FR1. Consequently, the second voltage divider resistor FR2 becomes inactive, and pin FB1 of the power supply chip is directly grounded through the first voltage divider resistor FR1. Compared to the stable input voltage case, the resistance of the voltage divider resistors decreases. With the voltage division at FB1 fixed, the output voltage of OUT1 increases, thus stabilizing the output voltage of OUT1 at 10.767V.

[0085] (ii) The purpose of increasing the output voltage of the OUT1 pin is to enable the OUT1 pin to power cameras with a wider voltage range, thereby increasing the compatible voltage range.

[0086] Continue according to Figure 5a The provided diagram shows that, without the first controllable module, regardless of how the external power supply voltage is increased (e.g., from VCC_12V to 24V), the output voltages of FB1 and OUT1 remain constant. After the first controllable module is configured, when the external power supply is consistently at 12V, and the first main control chip disables the first transistor Q1 via the VCAM_SEL enable signal, both the first voltage divider resistor FR1 and the second voltage divider resistor FR2 are connected to pin 15 of the power supply chip. Under the fixed voltage division of FB1 (fixed voltage 1.233V), the output voltage of pin OUT1 is 10.767V. When the first main control chip enables the first transistor Q1 to conduct via the VCAM_SEL signal, the first voltage divider resistor FR1 is directly grounded, thus rendering the second voltage divider resistor FR2 ineffective. The FB1 pin of the power supply chip is then directly grounded through the first voltage divider resistor FR1, reducing its resistance. With the voltage division of FB1 fixed, this increases the output voltage of OUT1, achieving a voltage greater than 10.767V. According to experimental data, by adding a controllable module, the output voltage range of OUT1 can be [10.767V, 11.27V], improving the camera's voltage adaptation range.

[0087] Figure 5b This is a schematic diagram of another first controllable module provided in Embodiment 4 of this application. Figure 5b Is Figure 4 This explanation is based on [the above]. Figure 5b The provided diagram shows that the first controllable module 30 includes: a first transistor T1, a fifth voltage divider resistor FR5, a sixth voltage divider resistor FR6, a fifth resistor RR5, and a sixth resistor RR6.

[0088] The base of the first transistor T1 is connected to one end of the fifth resistor RR5 and one end of the sixth resistor RR6. The emitter of the first transistor T1 is connected to the other end of the fifth resistor RR5 and to the ground terminal DGND. The collector of the first transistor T1 is connected to one end of the fifth voltage divider resistor FR5 and one end of the sixth voltage divider resistor FR6.

[0089] The other end of the fifth voltage divider resistor FR5 is connected to the fifteenth pin of the power chip U23 as the output terminal of the first controllable module 30.

[0090] The other end of the sixth voltage divider resistor FR6 is connected to the ground terminal.

[0091] The other end of the sixth resistor RR6 is connected to the fourteenth pin H2 of the first controllable module 30 as the input terminal.

[0092] Figure 5b and Figure 5a The difference lies in replacing the first transistor with a first triode, while the structure of other components remains the same. The resistance values ​​of other components may be changed depending on the requirements. Also, the first triode is assumed to be a forward-conducting switch.

[0093] according to Figure 5b The provided diagram shows that when the first main control chip U37E detects a stable 12V input voltage signal, it controls the fourteenth pin (i.e., the GPIO port) of the first main control chip U37E to remain inactive, so that the first transistor T1 is in the off state under the action of the low-level VCAM_SEL signal, so that the fifth voltage divider resistor FR5 and the sixth voltage divider resistor FR6 are both connected to the fifteenth pin of the power chip U23. Under the fixed voltage division of FB1 (fixed voltage 1.233V), the voltage output of the OUT1 pin is 10.767V. When the input voltage is detected to be lower than 12V, the high-level VCAM_SEL signal output by the first main control chip U37E turns on the first transistor T1, thereby rendering the sixth voltage divider resistor FR6 ineffective. The FB1 pin of the power chip U23 is directly grounded through the fifth voltage divider resistor FR5. Compared with the case of stable input voltage, the resistance value of the voltage divider resistor is reduced. With the voltage division of FB1 fixed, the voltage value of OUT1 output increases, thereby stabilizing the OUT1 output voltage at 10.767V.

[0094] Similarly, the first controllable module also has the function of increasing the output voltage of the OUT1 pin, so that the OUT1 pin can supply power to cameras with a wider voltage range and increase the adaptable voltage range. For details, please refer to the above embodiment.

[0095] Example 5

[0096] Figure 6a This is a schematic diagram of the structure of a second controllable module provided in Embodiment 5 of this application. Figure 6a Is Figure 4 This explanation is based on [the above]. Figure 6a The provided diagram shows that the second controllable module 40 includes: a second transistor Q2, a third voltage divider resistor FR3, a fourth voltage divider resistor FR4, a third resistor RR3, and a fourth resistor RR4.

[0097] The control terminal of the second transistor Q2 is connected to one end of the third resistor RR3 and one end of the fourth resistor RR4. The first terminal of the second transistor Q2 and the other end of the third resistor RR3 are connected to the ground terminal. The second terminal of the second transistor Q2 is connected to one end of the third voltage divider resistor FR3 and one end of the fourth voltage divider resistor FR4.

[0098] The other end of the third voltage divider resistor FR3 is connected to the thirteenth pin of the power chip U23 as the output terminal of the second controllable module 40.

[0099] The other end of the fourth voltage divider resistor FR4 is connected to the ground terminal.

[0100] The other end of the fourth resistor RR4 is connected to the fourteenth pin H2 of the first main control chip U37E as the input terminal of the second controllable module 40.

[0101] The second transistor can be understood as a device with switching function, such as an NMOS transistor or a PMOS transistor. This application uses an NMOS transistor for illustration.

[0102] according to Figure 6a The provided diagram shows that when the first main control chip detects a stable 12V input voltage signal, it keeps its fourteenth pin (GPIO port) inactive, causing the second transistor Q2 to be off under the influence of the low-level VCAM_SEL signal. This connects both the third and fourth voltage divider resistors FR3 and FR4 to the thirteenth pin of the power supply chip U23. Under the fixed voltage division of FB2 (fixed voltage 1.233V), the voltage output of the OUT2 pin is 10.767V. When the input voltage is detected to be below 12V, the high-level VCAM_SEL signal output by the first main control chip U37E turns on the second transistor Q2, thus rendering the fourth voltage divider resistor FR4 inactive. The FB2 pin of the power supply chip is directly grounded through the third voltage divider resistor FR3. Compared to the stable input voltage case, the resistance of the voltage divider resistors decreases. With the voltage division of FB2 fixed, the voltage value output by OUT2 increases, achieving the goal of stabilizing the OUT2 output voltage at 10.767V.

[0103] Similarly, the second controllable module also has the function of increasing the output voltage of the OUT2 pin, so that the OUT2 pin can supply power to cameras with a wider voltage range and increase the adaptable voltage range. For details, please refer to the above embodiment.

[0104] In one possible example scenario, Figure 6b This is a schematic diagram of another second controllable module provided in Embodiment 5 of this application. Figure 6b Is Figure 4 This explanation is based on [the above]. Figure 6bThe provided diagram shows that the second controllable module 40 includes: a second transistor T2, a seventh voltage divider resistor FR7, an eighth voltage divider resistor FR8, a seventh resistor RR7, and an eighth resistor RR8.

[0105] The base of the second transistor T2 is connected to one end of the seventh resistor RR7 and one end of the eighth resistor RR8. The emitter of the second transistor T2 is connected to the other end of the seventh resistor RR7 and to the ground terminal. The collector of the second transistor T2 is connected to one end of the seventh voltage divider resistor FR7 and one end of the eighth voltage divider resistor FR8.

[0106] The other end of the seventh voltage divider resistor FR7 is connected to the thirteenth pin of the power chip U23 as the output terminal of the second controllable module 40.

[0107] The other end of the eighth voltage divider resistor FR8 is connected to the ground terminal.

[0108] The other end of the eighth resistor RR8 is connected to the fourteenth pin H2 of the first main control chip U37E as the input terminal of the second controllable module 40.

[0109] Figure 6b and Figure 6a The difference lies in replacing the second transistor with a second triode; the structure of other components remains the same, and the resistance values ​​of other components may be changed depending on the requirements. Furthermore, the second triode is assumed to be a forward-conducting switching transistor.

[0110] according to Figure 6b The provided diagram shows that when the first main control chip U37E detects a stable 12V input voltage signal, it controls the fourteenth pin (i.e., the GPIO port) of the first main control chip U37E to remain inactive, so that the second transistor T2 is in the off state under the action of the low-level VCAM_SEL signal, so that the seventh voltage divider resistor FR7 and the eighth voltage divider resistor FR8 are both connected to the thirteenth pin of the power chip U23. Under the fixed voltage division of FB2 (fixed voltage 1.233V), the voltage output of the OUT2 pin is 10.767V. When the input voltage is detected to be lower than 12V, the high-level VCAM_SEL signal (e.g., 3.3V high level) output by the first main control chip U37E turns on the second transistor T2, thereby rendering the eighth voltage divider resistor FR8 ineffective. The FB2 pin of the power chip U23 is directly grounded through the seventh voltage divider resistor FR7. Compared with the case of stable input voltage, the resistance value of the voltage divider resistor is reduced. With the voltage division of FB2 fixed, the voltage value of OUT2 output increases, thereby stabilizing the OUT2 output voltage at 10.767V.

[0111] Similarly, the second controllable module also has the function of increasing the output voltage of the OUT2 pin, so that the OUT2 pin can supply power to cameras with a wider voltage range and increase the adaptable voltage range. For details, please refer to the above embodiment.

[0112] Example 6

[0113] Figure 7a This is a schematic diagram of the structure of a first diagnostic module provided in Embodiment Six of this application. Figure 7a This description is based on the previous embodiment. Figure 7a The diagram provided shows that the controllable power supply system 100 also includes: a first diagnostic module 70.

[0114] The first input terminal of the first diagnostic module 70 is connected to the sixth pin of the power chip U23, the second input terminal of the first diagnostic module 70 is connected to the fifth pin of the power chip U23, the first output terminal of the first diagnostic module 70 is connected to the fifteenth pin V_SENSE_P_T of the second main control chip U37C, and the second output terminal of the first diagnostic module 70 is connected to the sixteenth pin V_SENSE_D_T of the second main control chip U37C. The first diagnostic module 70 is used to perform short circuit diagnosis on the power module 20.

[0115] according to Figure 7a The provided diagram shows that the power chip and the second main control chip are connected through the first diagnostic module. If the camera connected to the OUT1 output terminal is short-circuited, the output current of pins 5 and 6 of the power chip will increase. The first diagnostic module detects the output current or output voltage of pins 5 and 6 of the power chip and feeds the detection result back to the second main control chip. When the second main control chip detects that the output voltage of the power chip has increased beyond a certain voltage threshold, it indicates that a short circuit has occurred. This eliminates the need for external hardware circuit detection, reduces production costs, and improves the product's cost-effectiveness.

[0116] In one possible example scenario, Figure 7b This is a schematic diagram of another first diagnostic module provided in Embodiment Six of this application. Figure 7b Is Figure 7a This explanation is based on [the above]. Figure 7b The provided diagram shows that the first diagnostic module 70 includes: a first capacitor C1, a second capacitor C2, a ninth resistor RR9, a tenth resistor RR10, an eleventh resistor RR11, and a twelfth resistor RR12.

[0117] One end of the ninth resistor RR9 is connected to the sixth pin of the power chip U23 as the first input terminal of the first diagnostic module 70. The other end of the ninth resistor RR9 is connected to one end of the tenth resistor RR10, one end of the first capacitor C1, and the fifteenth pin V_SENSE_P_T of the second main control chip U37C as the first output terminal of the first diagnostic module 70.

[0118] The other end of the tenth resistor RR10, the other end of the first capacitor C1, one end of the twelfth resistor RR12, and one end of the second capacitor C2 are connected to the ground terminal DGND.

[0119] One end of the eleventh resistor RR11 is connected to the fifth pin of the power chip U23 as the second input terminal of the first diagnostic module 70. The other end of the eleventh resistor RR11 is connected to the other end of the twelfth resistor RR12, the other end of the second capacitor C2, and the sixteenth pin V_SENSE_D_T of the second main control chip U37C as the second output terminal of the first diagnostic module 70.

[0120] according to Figure 7b The provided diagram shows that the V_SENSE_P signal output by the power supply chip is converted into a V_SENSE_P_T signal by the first diagnostic module and transmitted to the second main control chip. Similarly, the V_SENSE_D signal output by the power supply chip is converted into a V_SENSE_D_T signal by the first diagnostic module and transmitted to the second main control chip, thus achieving short-circuit detection of the power supply chip. This reduces debugging and equipment failures caused by complex circuits, lowers after-sales costs, significantly improves the product's cost-effectiveness, and achieves the goal of cost savings.

[0121] Example 7

[0122] Figure 8a This is a schematic diagram of the structure of a second diagnostic module provided in Embodiment 7 of this application. Figure 8a Is Figure 4 This explanation is based on [the above]. Figure 8a The diagram provided shows that the controllable power supply system 100 also includes a second diagnostic module 80.

[0123] The first input terminal of the second diagnostic module 80 is connected to the sixteenth pin of the power chip U23, the second input terminal of the second diagnostic module 80 is connected to the fourteenth pin of the power chip U23, the third input terminal of the second diagnostic module 80 is connected to the system power supply SYS_12V output terminal, the first output terminal of the second diagnostic module 80 is connected to the ninth pin VCC_CAM_D_T of the second main control chip U37C, the second output terminal of the second diagnostic module 80 is connected to the eleventh pin VCC_CAM_P_T of the second main control chip U37C, and the third output terminal of the second diagnostic module 80 is connected to the second pin 12V_TEST of the second main control chip U37C. The second diagnostic module 80 is used to perform open circuit diagnosis on the power module 20.

[0124] according to Figure 8a The provided diagram shows that the power supply chip and the second main control chip are connected via a second diagnostic module. If an open circuit occurs in the camera connected to the OUT1 output terminal, the second diagnostic module detects the output voltage of the power supply chip at the OUT1 pin and feeds the detection result back to the second main control chip. The second main control chip determines an open circuit fault if it detects that the output voltage is lower than a voltage threshold. This achieves self-detection of open circuits, eliminating the need for external hardware circuitry, reducing production costs, and improving product cost-effectiveness.

[0125] In one possible example scenario, Figure 8b This is a schematic diagram of another second diagnostic module provided in Embodiment 7 of this application. Figure 8b Is Figure 8a This explanation is based on [the above]. Figure 8b The provided diagram shows that the second diagnostic module 80 includes: a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a thirteenth resistor RR13, a fourteenth resistor RR14, a fifteenth resistor RR15, a sixteenth resistor RR16, a seventeenth resistor RR17, and an eighteenth resistor RR18.

[0126] One end of the thirteenth resistor RR13 is connected to the sixteenth pin of the power chip U23 as the first input terminal of the second diagnostic module 80. The other end of the thirteenth resistor RR13 is connected to one end of the fourteenth resistor RR14, one end of the third capacitor C3, and the ninth pin VCC_CAM_D_T of the second main control chip U37C as the first output terminal of the second diagnostic module 80.

[0127] The other end of the fourteenth resistor RR14, the other end of the third capacitor C3, one end of the sixteenth resistor RR16, one end of the fourth capacitor C4, one end of the eighteenth resistor RR18, and one end of the fifth capacitor C5 are connected to the ground terminal DGND.

[0128] One end of the fifteenth resistor RR15 serves as the second input terminal of the second diagnostic module 80 and is connected to the fourteenth pin of the power chip U23. The other end of the fifteenth resistor RR15 serves as the second output terminal of the second diagnostic module 80 and is connected to the other end of the sixteenth resistor RR16, the other end of the fourth capacitor C4, and the eleventh pin VCC_CAM_P_T of the second main control chip U37C.

[0129] One end of the seventeenth resistor RR17 is connected to the third input terminal of the second diagnostic module 80 and the output terminal of the system power supply YSY_12V. The other end of the seventeenth resistor RR17 is connected to the third output terminal of the second diagnostic module 80, the other end of the eighteenth resistor RR18, the other end of the fifth capacitor C5, and the second pin 12V_TEST of the second main control chip U37C.

[0130] The system power supply SYS_12V is supplied as 12V_TEST to the second main control chip through the seventeenth resistor RR17 and the eighteenth resistor RR18.

[0131] according to Figure 8b The provided diagram shows that the VCC_CAM_P signal output by the power supply chip is converted into a VCC_CAM_P_T signal by the second diagnostic module and transmitted to the second main control chip. The VCC_CAM_D signal output by the power supply chip is converted into a VCC_CAM_D_T signal by the second diagnostic module.

[0132] Example 8

[0133] Figure 9 This is a structural schematic diagram of a controllable power supply device for an automotive-grade camera, provided in Embodiment 8 of this application. According to... Figure 9 The provided diagram shows the structure of the controllable power supply device 1000 for the automotive-grade camera, which includes:

[0134] The automotive-grade camera 200 and the controllable power supply system 100 described in the above embodiments are connected to the automotive-grade camera 200.

[0135] The controllable power supply device 1000 for the automotive-grade camera provided in this embodiment can be as follows: Figure 9 The controllable power supply device 1000 for the automotive-grade camera shown includes, for example: Figure 1-8b For details on the structure of the controllable power supply system 100, please refer to [reference needed]. Figure 1-8b The relevant descriptions are presented concisely and will not be elaborated upon here.

[0136] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0137] Finally, it should be noted that the above 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A controllable power supply system for automotive-grade cameras, characterized in that, include: Main control module, power supply module, first controllable module and second controllable module; The first output terminal of the main control module is connected to the first input terminal of the power module, the second output terminal of the main control module is connected to the second input terminal of the power module, the third output terminal of the main control module is connected to the input terminals of the first controllable module and the second controllable module, the first input terminal of the main control module is connected to the first output terminal of the power module, the second input terminal of the main control module is connected to the second output terminal of the power module, the third input terminal of the main control module is connected to the third output terminal of the power module, and the fourth input terminal of the main control module is connected to the fourth output terminal of the power module. The main control module is used to control the startup of the power module, the first controllable module and the second controllable module, and to perform fault diagnosis on the power module. The output terminal of the first controllable module is connected to the third input terminal and the third output terminal of the power module, and the first controllable module is used to adjust the first output voltage of the power module. The output terminal of the second controllable module is connected to the fourth input terminal and the fourth output terminal of the power module, and the second controllable module is used to adjust the second output voltage of the power module.

2. The controllable power supply system according to claim 1, characterized in that, The main control module includes: a first main control chip and a second main control chip; The H2 pin of the first main control chip is connected to the input of the first controllable module and the input of the second controllable module as the third output terminal of the main control module. The L3 pin of the first main control chip is connected to the second input of the power module as the second output terminal of the main control module. The K2 pin of the first main control chip is connected to the first input of the power module as the first output terminal of the main control module. The first main control chip is used to control the startup of the power module, the first controllable module and the second controllable module. The U8 pin of the second main control chip is connected to the first output terminal of the power module as the first input terminal of the main control module. The R7 pin of the second main control chip is connected to the second output terminal of the power module as the second input terminal of the main control module. The P7 pin of the second main control chip is connected to the fourth output terminal of the power module as the fourth input terminal of the main control module. The V5 pin of the second main control chip is connected to the third output terminal of the power module as the third input terminal of the main control module. The second main control chip is used to diagnose faults in the power module.

3. The controllable power supply system according to claim 2, characterized in that, The power module includes: a power chip; The first pin of the power chip is connected to the external power output terminal. The fifth pin of the power chip serves as the first output terminal of the power module and is connected to the U8 pin of the second main control chip. The sixth pin of the power chip serves as the second output terminal of the power module and is connected to the R7 pin of the second main control chip. The second pin of the power chip serves as the first input terminal of the power module and is connected to the K2 pin of the first main control chip. The third pin of the power chip serves as the second input terminal of the power module and is connected to the L3 pin of the first main control chip. The thirteenth pin of the power chip serves as the fourth input terminal of the power module and is connected to the output terminal of the second controllable module. The fourteenth pin of the power chip serves as the fourth output terminal of the power module and is connected to the output terminal of the second controllable module and the P7 pin of the second main control chip. The fifteenth pin of the power chip serves as the third input terminal of the power module and is connected to the output terminal of the first controllable module. The sixteenth pin of the power chip serves as the third output terminal of the power module and is connected to the V5 pin of the second main control chip.

4. The controllable power supply system according to claim 3, characterized in that, The first controllable module includes: a first transistor Q1, a first voltage divider resistor FR1, a second voltage divider resistor FR2, a first resistor RR1, and a second resistor RR2; the control terminal of the first transistor Q1 is connected to one end of the first resistor RR1 and one end of the second resistor RR2, the first end of the first transistor Q1 and the other end of the first resistor RR1 are connected to a ground terminal, and the second end of the first transistor Q1 is connected to one end of the first voltage divider resistor FR1 and one end of the second voltage divider resistor FR2; The other end of the first voltage divider resistor FR1 is connected to the fifteenth pin of the power chip as the output terminal of the first controllable module. The other end of the second voltage divider resistor FR2 is connected to the ground terminal; The other end of the second resistor RR2 is connected to the H2 pin of the first main control chip as the input terminal of the first controllable module.

5. The controllable power supply system according to claim 3, characterized in that, The second controllable module includes: a second transistor Q2, a third voltage divider resistor FR3, a fourth voltage divider resistor FR4, a third resistor RR3, and a fourth resistor RR4; The control terminal of the second transistor Q2 is connected to one end of the third resistor RR3 and one end of the fourth resistor RR4. The first terminal of the second transistor Q2 is connected to the other end of the third resistor RR3 and to the ground terminal. The second terminal of the second transistor Q2 is connected to one end of the third voltage divider resistor FR3 and one end of the fourth voltage divider resistor FR4. The other end of the third voltage divider resistor FR3 is connected to the thirteenth pin of the power chip as the output terminal of the second controllable module. The other end of the fourth voltage divider resistor FR4 is connected to the ground terminal; The other end of the fourth resistor RR4 is connected to the H2 pin of the first main control chip as the input terminal of the second controllable module.

6. The controllable power supply system according to claim 3, characterized in that, The first controllable module includes: a first transistor T1, a fifth voltage divider resistor FR5, a sixth voltage divider resistor FR6, a fifth resistor RR5, and a sixth resistor RR6; The base of the first transistor T1 is connected to one end of the fifth resistor RR5 and one end of the sixth resistor RR6, the emitter of the first transistor T1 is connected to the other end of the fifth resistor RR5 and ground, and the collector of the first transistor T1 is connected to one end of the fifth voltage divider resistor FR5 and one end of the sixth voltage divider resistor FR6. The other end of the fifth voltage divider resistor FR5 is connected to the fifteenth pin of the power chip as the output terminal of the first controllable module. The other end of the sixth voltage divider resistor FR6 is connected to the ground terminal; The other end of the sixth resistor RR6 is connected to the H2 pin of the first main control chip as the input terminal of the first controllable module.

7. The controllable power supply system according to claim 3, characterized in that, The second controllable module includes: a second transistor T2, a seventh voltage divider resistor FR7, an eighth voltage divider resistor FR8, a seventh resistor RR7, and an eighth resistor RR8; The base of the second transistor T2 is connected to one end of the seventh resistor RR7 and one end of the eighth resistor RR8; the emitter of the second transistor T2 is connected to the other end of the seventh resistor RR7 and to the ground terminal; and the collector of the second transistor T2 is connected to one end of the seventh voltage divider resistor FR7 and one end of the eighth voltage divider resistor FR8. The other end of the seventh voltage divider resistor FR7 is connected to the thirteenth pin of the power chip as the output terminal of the second controllable module. The other end of the eighth voltage divider resistor FR8 is connected to the ground terminal; The other end of the eighth resistor RR8 is connected to the H2 pin of the first main control chip as the input terminal of the second controllable module.

8. The controllable power supply system according to claim 3, characterized in that, The controllable power supply system further includes: a first diagnostic module and a second diagnostic module; The first input terminal of the first diagnostic module is connected to the sixth pin of the power chip, the second input terminal of the first diagnostic module is connected to the fifth pin of the power chip, the first output terminal of the first diagnostic module is connected to the R7 pin of the second main control chip, and the second output terminal of the first diagnostic module is connected to the U8 pin of the second main control chip. The first diagnostic module is used to perform short circuit diagnosis on the power module. The first input terminal of the second diagnostic module is connected to the sixteenth pin of the power supply chip, the second input terminal of the second diagnostic module is connected to the fourteenth pin of the power supply chip, the third input terminal of the second diagnostic module is connected to the system power output terminal, the first output terminal of the second diagnostic module is connected to the V5 pin of the second main control chip, the second output terminal of the second diagnostic module is connected to the P7 pin of the second main control chip, and the third output terminal of the second diagnostic module is connected to the R5 pin of the second main control chip. The second diagnostic module is used to perform open circuit diagnosis on the power supply module.

9. The controllable power supply system according to claim 8, characterized in that, The first diagnostic module includes: a first capacitor C1, a second capacitor C2, a ninth resistor RR9, a tenth resistor RR10, an eleventh resistor RR11, and a twelfth resistor RR12; The second diagnostic module includes: a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a thirteenth resistor RR13, a fourteenth resistor RR14, a fifteenth resistor RR15, a sixteenth resistor RR16, a seventeenth resistor RR17, and an eighteenth resistor RR18; One end of the ninth resistor is connected to the sixth pin of the power chip as the first input terminal of the first diagnostic module, and the other end of the ninth resistor is connected to one end of the tenth resistor, one end of the first capacitor, and the R7 pin of the second main control chip as the first output terminal of the first diagnostic module. The other end of the tenth resistor is connected to the other end of the first capacitor, one end of the twelfth resistor and one end of the second capacitor to the ground terminal; One end of the eleventh resistor is connected to the fifth pin of the power chip as the second input terminal of the first diagnostic module, and the other end of the eleventh resistor is connected to the other end of the twelfth resistor, the other end of the second capacitor, and the U8 pin of the second main control chip as the second output terminal of the first diagnostic module. One end of the thirteenth resistor is connected to the sixteenth pin of the power chip as the first input terminal of the second diagnostic module, and the other end of the thirteenth resistor is connected to one end of the fourteenth resistor, one end of the third capacitor, and the V5 pin of the second main control chip as the first output terminal of the second diagnostic module. The other end of the fourteenth resistor, the other end of the third capacitor, one end of the sixteenth resistor, one end of the fourth capacitor, one end of the eighteenth resistor, and one end of the fifth capacitor are connected to the ground terminal; One end of the fifteenth resistor is connected to the fourteenth pin of the power chip as the second input terminal of the second diagnostic module, and the other end of the fifteenth resistor is connected to the other end of the sixteenth resistor, the other end of the fourth capacitor, and the P7 pin of the second main control chip as the second output terminal of the second diagnostic module. One end of the seventeenth resistor is connected to the system power output terminal as the third input terminal of the second diagnostic module, and the other end of the seventeenth resistor is connected to the other end of the eighteenth resistor, the other end of the fifth capacitor, and the R5 pin of the second main control chip as the third output terminal of the second diagnostic module.

10. A controllable power supply device for an automotive-grade camera, characterized in that, include: The automotive-grade camera and the controllable power supply system according to any one of claims 1-9, wherein the controllable power supply system is connected to the automotive-grade camera.

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