Automobile lamp driving control circuit PCBA, system, device and automobile

Abstract

The utility model provides an automobile lamp drive control circuit PCBA, system and device and an automobile. The automobile lamp drive control circuit PCBA comprises a PCB and an automobile lamp drive control circuit formed on the PCB. The automobile lamp driving control circuit comprises a control module, a DCDC current and voltage adjusting module, an SBC module, an LDO module, a high-side switch module, a low-side switch module, a motor driving module and a CAN transceiver module. Wherein a plurality of control ends of the control module are respectively connected with one end of the DCDC current and voltage regulation module, one end of the SBC module, one end of the high-side switch module, one end of the low-side switch module, one end of the motor driving module and one end of the CAN transceiver module. According to the technical scheme, the problems of how to develop a product with lower cost in a short development period and how to ensure the performance of the vehicle lamp drive control circuit PCBA with a new framework are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicles, and in particular relates to a headlight drive control circuit PCBA, a system, a device and a vehicle. Background Art

[0002] Traditional LED headlights are controlled and loaded by separate headlight drive controllers on the left and right. With the rapid development of the headlight industry, it is necessary to develop lower-cost products in a shorter development cycle. Therefore, how to develop a headlight control architecture and control method that can fully meet the low-cost and short-cycle application requirements has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0003] The utility model provides a headlight drive control circuit PCBA, a system, a device and a car to solve the problem of how to develop a lower-cost product in a short development cycle and at the same time ensure the performance of a headlight drive control circuit PCBA of a new structure.

[0004] According to a first aspect of the utility model, a vehicle light driving control circuit PCBA is provided, comprising: a PCB circuit board, and a vehicle light driving control circuit formed on the PCB circuit board; wherein the vehicle light driving control circuit comprises:

[0005] A control module, a DCDC current and voltage regulating module, an SBC module, an LDO module, a high-side switch module, a low-side switch module, a motor drive module and a CAN transceiver module; wherein the control terminals of the control module are respectively connected to one end of the DCDC current and voltage regulating module, the SBC module, the high-side switch module, the low-side switch module, the motor drive module and the CAN transceiver module;

[0006] Wherein, the control module is used to drive and control the left and right lights of the car.

[0007] Optionally, the DCDC current and voltage regulation module includes:

[0008] DCDC boost constant voltage chip, DCDC buck constant current chip and DCDC constant voltage chip; wherein the DCDC boost constant voltage chip and the DCDC buck constant current chip are respectively connected to a control end of the control module; the DCDC boost constant voltage chip and the DCDC constant voltage chip are used to input the front-end voltage;

[0009] The DCDC current and voltage regulating module is used to boost the front-end voltage of the headlight driving control circuit through the DCDC boost constant voltage chip, and after the DCDC buck constant current chip bucks the voltage and drives the constant current, outputs a constant current to drive the left headlight or the right headlight of the car;

[0010] And / or the DCDC current and voltage regulation module is used to process the front-end voltage of the vehicle light drive control circuit through the DCDC constant voltage chip and output a constant voltage, and to drive the left vehicle light or / and the right vehicle light with a constant current through the constant current driving function of the left vehicle light or / and the right vehicle light.

[0011] Optionally, in the vehicle light driving control circuit, the degree of electromagnetic interference generated by the wiring method of the circuit on the PCB board is adapted to the first electromagnetic interference limit of the vehicle light driving control circuit.

[0012] According to a second aspect of the present invention, a vehicle light drive control circuit PCBA system is provided, comprising the vehicle light drive control circuit PCBA according to any one of the first aspect of the present invention, and the vehicle light drive control circuit PCBA system further comprises:

[0013] The automotive CEM module is connected to the control module in the drive control circuit PCBA through a set of CAN network lines, so that one of the control modules and the automotive CEM module communicate and interact through the set of CAN network lines;

[0014] A voltage-dividing network; the voltage-dividing network and the automobile CEM module are respectively connected to one end of the control module.

[0015] According to a third aspect of the present invention, a drive control device is provided, comprising: the vehicle light drive control circuit PCBA system according to the second aspect of the present invention; the drive control device further comprises:

[0016] A drive box upper cover, a drive box lower cover and a connecting device;

[0017] Wherein, the drive control circuit PCBA is formed on the lower cover of the drive box; the upper cover of the drive box is connected to the lower cover of the drive box through the connecting device to form the drive control device.

[0018] According to a fourth aspect of the present utility model, a vehicle is provided, comprising a drive control device as described in any one of the third aspects of the present utility model.

[0019] The utility model provides a car light drive control circuit PCBA, which uses only one control module to control the left and right lights of the car, creatively proposes a new control mode of the car headlights (including the left and right lights of the car), and cleverly designs the wiring method to ensure the performance of the new structure of the car light drive control circuit PCBA, and strengthens the electromagnetic compatibility of the product. At the same time, it realizes the development of lower-cost products in a shorter development cycle, conforming to the new trend of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A module diagram of a drive control circuit PCBA provided in one embodiment of the utility model;

[0021] Figure 2 A module diagram of a drive control circuit PCBA provided in a typical embodiment of the utility model;

[0022] Figure 3 A wiring and architecture diagram of a drive control circuit PCBA provided in a specific embodiment of the utility model;

[0023] Description of reference numerals:

[0024] 101-DCDC current and voltage regulation module;

[0025] 1011-DCDC boost constant voltage chip,

[0026] 1012-DCDC step-down constant current chip;

[0027] 1013-DCDC constant voltage chip;

[0028] 102-control module;

[0029] 103-SBC module;

[0030] 104-LDO module;

[0031] 105-motor drive module;

[0032] 106-CAN transceiver module;

[0033] 107-high side switch module;

[0034] 108- low side switch module;

[0035] 109-Automotive EMC module;

[0036] 110-voltage divider network. DETAILED DESCRIPTION

[0037] Traditional LED headlights are controlled and loaded by separate headlight drive controllers on the left and right. With the rapid development of the headlight industry, it is necessary to develop lower-cost products in a shorter development cycle.

[0038] Due to the high cost of the traditional dual controller, a solution of controlling the left and right headlights with one controller is proposed. Specifically, the traditional left and right lights are controlled separately, and the two drivers are combined into one, so that one driver can control the left and right headlights at the same time, which can fully meet the application requirements of low cost and short cycle. Therefore, the application of vehicle light platform will have broad prospects.

[0039] When a controller is used, the inventor of the present application creatively discovered that the electromagnetic interference of the product becomes stronger and the anti-interference ability becomes worse. After repeated experiments and demonstrations, the inventor found that the electromagnetic interference problem is caused by the connection harness from the driver to the light board being longer than the traditional one, thus causing electromagnetic interference.

[0040] Based on this discovery, the inventor of the present application proposed, after repeated experiments, a technical solution of optimizing the PCB layout and wiring method of the driver, thereby improving the overall wiring method, increasing the performance of the product, and enhancing the electromagnetic compatibility performance of the product.

[0041] Therefore, the technical solution provided by this application solves the cost problem and reduces electromagnetic interference through creative wiring methods based on the electromagnetic interference phenomenon caused by the new solution. A new energy vehicle left and right light control solution with the best overall effect is proposed.

[0042] The following will be described in more detail with reference to the schematic diagram of a headlight drive control circuit PCBA, system, device and automobile of the utility model, wherein the preferred embodiment of the utility model is shown. It should be understood that the technical personnel in the field can modify the utility model described herein, and still achieve the advantageous effects of the utility model. Therefore, the following description should be understood as being widely known to the technical personnel in the field, and not as a limitation to the utility model.

[0043] Please refer to Figure 1-Figure 3 According to an embodiment of the utility model, a vehicle lamp driving control circuit PCBA is provided, such as Figure 1 As shown; comprising: a PCB circuit board, and a headlight drive control circuit formed on the PCB circuit board; wherein the headlight drive control circuit comprises:

[0044] A control module 102, a DCDC current and voltage regulating module 101, an SBC module 103, an LDO module 104, a high-side switch module 107, a low-side switch module 108, a motor drive module 105 and a CAN transceiver module 106; wherein the control terminals of the control module 102 are respectively connected to one end of the DCDC current and voltage regulating module 101, the SBC module 103, the high-side switch module 107, the low-side switch module 108, the motor drive module 105 and the CAN transceiver module 106;

[0045] The control module 102 is used to drive and control the left and right lights of the vehicle.

[0046] The utility model provides a car light drive control circuit PCBA, which uses only one control module to control the left and right lights of the car, creatively proposes a new control mode of the car headlights (including the left and right lights of the car), and cleverly designs the wiring method to ensure the performance of the new structure of the car light drive control circuit PCBA, and strengthens the electromagnetic compatibility of the product. At the same time, it realizes the development of lower-cost products in a shorter development cycle, conforming to the new trend of the industry.

[0047] In one embodiment, the DCDC current and voltage regulation module 101 is as follows: Figure 2 As shown; specifically including:

[0048] DCDC boost constant voltage chip 1011, DCDC buck constant current chip 1012 and DCDC constant voltage chip 1013; wherein the DCDC boost constant voltage chip 1011 and the DCDC buck constant current chip 1012 are respectively connected to a control end of the control module 102; the DCDC boost constant voltage chip 1011 and the DCDC constant voltage chip 1013 are used to input the front-end voltage;

[0049] The DCDC current and voltage regulating module 101 is used to boost the front-end voltage of the headlight driving control circuit through the DCDC boost constant voltage chip 1011, and after the DCDC buck constant current chip 1012 bucks the voltage and drives the constant current, outputs a constant current to drive the left headlight or the right headlight of the car;

[0050] And / or the DCDC current and voltage regulation module 101 is used to process the front-end voltage of the vehicle light driving control circuit and output it at a constant voltage through the DCDC constant voltage chip 1013, and to drive the left vehicle light or / and the right vehicle light at a constant current through the constant current driving function of the left vehicle light or / and the right vehicle light.

[0051] Among them, the DCDC step-down constant current chip 1012 includes several CC channels; the CC constant current channels are respectively allocated to the high and low beam lights and some signal lights;

[0052] The DCDC constant voltage chip 1013 includes several CV channels. The lighting and control of other signal lights need to be controlled by CV (constant voltage) output power supply. CV drive can also drive the power supply of the thousand-pixel headlight interactive screen, which is impossible to achieve with the DCDC current and voltage regulation module 101 with only CC channels. This embodiment is suitable for headlight control of new energy vehicles with screens.

[0053] In one embodiment, in the vehicle light driving control circuit, the electromagnetic interference level generated by the wiring method of the circuit on the PCB board is adapted to the first electromagnetic interference limit of the vehicle light driving control circuit.

[0054] The first interference limit refers to: when a technician in the field knows the technical solution of a control module 102 provided by the utility model to control the left and right lights of the car, the wiring method on the PCB board formed by controlling the left and right lights of the car by a control module 102, without conducting a lot of experiments and creatively improving the wiring method, the technicians in the field can propose the degree of electromagnetic interference generated by the wiring method.

[0055] In a preferred embodiment, the first electromagnetic interference limit refers to the electromagnetic interference generated by the wiring method on the PCB board formed by controlling the left and right lights of the car through a controller, and the impact on the performance of the car light driving control circuit is equal to or slightly higher than the impact on the performance of the car light driving control circuit caused by the electromagnetic interference formed by the wiring method of controlling the left and right lights of the car through two control modules 102 respectively, and this impact on the performance of the entire control circuit can be ignored.

[0056] In other implementations, the first electromagnetic interference limit may also be other interference levels, and the present invention is not limited thereto.

[0057] According to an embodiment of the present utility model, a vehicle light drive control circuit PCBA system is further provided, comprising the vehicle light drive control circuit PCBA according to any one of the first aspects of the present utility model, and the vehicle light drive control circuit PCBA system further comprises:

[0058] The automotive EMC module 109 is connected to the control module 102 in the drive control circuit PCBA through a set of CAN network lines, so that one of the control modules 102 and the automotive EMC module 109 communicate and interact through a set of the CAN network lines.

[0059] The voltage dividing network 110 and the automobile EMC module 109 are respectively connected to one end of the control module 102 .

[0060] It can be seen that in the technical solution provided by this embodiment, only one set of CAN network lines can be used to achieve interconnection with the automotive EMC module 109, which can save CAN network resources compared with the traditional two-driver controller circuit. Moreover, one driver controls the left and right lights at the same time to realize the interactive function of the lamps, which is more convenient.

[0061] In a specific embodiment, Figure 3 As shown; the DCDC current and voltage regulation module 101 includes a DCDC boost constant voltage chip 1011, a DCDC buck constant current chip 1012, and a DCDC constant voltage chip 1013;

[0062] The DCDC boost constant voltage chip is connected to the MCU via the SPI interface. The DCDC boost constant voltage chip is a boost circuit. The BOOST circuit includes CH1 and CH2 connected in sequence at the first position. The CC channel is grounded.

[0063] The DCDC step-down constant current chip is connected to the MCU via the SPI interface; the DCDC step-down constant current chip is a CC mode BUCK circuit, wherein the BUCK circuit includes a BUCK1 CC channel-BUCK6CC channel; the DCDC constant voltage chip is a CV mode BUCK circuit, wherein the CV mode BUCK circuit includes a BUCK1 CV channel and a BUCK2CV channel;

[0064] The control module is MCU;

[0065] The LDO module is LDO; LDO is used to provide 5V voltage;

[0066] The motor drive module includes: DC motor control 1 and DC motor control 2, which respectively provide motor Dr i ver; two stepper motors are connected to MCU through stepper motor drivers; wherein, the two stepper motor drive modules are respectively connected to the SPI interface of MCU, and are respectively connected to the signal interface of MCU for receiving signals; the stepper motor drive modules include a 5V voltage input terminal and a VBT terminal; and the stepper motor drive modules are respectively connected to the corresponding stepper motor (MOTOR-Dr i ver) through MOTOR YN\YP\XN\XP\GND.

[0067] CAN transceiver module; includes three CAN transceivers (UART-CAN\CAN) connected to the RX\TX ports of the MCU respectively, and provides UART CANH, UART CANL, UART CANH, UART CANL, and CANH, CANL in turn; and then realizes the control of Far high and low beam, Far signal light and Far VI U respectively;

[0068] High-side switch modules include: HSS1 (PMOS) - HSS4 (PMOS), HSS5 (high-side switch) - HSS8 (high-side switch);

[0069] Among them, the MCU controls HSS1 (PMOS)-HSS4 (PMOS) through a SW control (PWM);

[0070] HSS1(PMOS)-HSS4(PMOS) provide PWM High Side Driver 1-4 respectively;

[0071] MCU controls HSS5 (high side switch) -HSS8 (high side switch) through SW control respectively. HSS5 (high side switch) -HSS8 (high side switch) provide PWM High Side Driver 5-8 respectively.

[0072] The low side switch module includes LSS1-LSS6, and LSS1-LSS6 are grounded respectively; wherein, the MCU controls LSS1-LSS6 through a SW control (PWM), and LSS1-LSS6 respectively provide Low Side Driver;

[0073] Voltage divider network; one end of the voltage divider network is connected to pins NTC, RB IN, and HALL through a 10-way ADC; the other end is connected to the ADC acquisition port of the MCU; the voltage divider network includes three resistors connected to each other at one end, one of which is grounded, and the other end of the other resistor is used to input a 5V voltage; the third end of the voltage divider network can be allocated to connect the R / L Modulator SW function, the RBI N function, the NTC function, and the Hall sensor function.

[0074] Automotive EMC module (EMC);

[0075] The SBC module is a monitoring and reset module for power supply and sleep wake-up of CANFD (2M) MCU; the three output ends of the SBC module are respectively connected to the RESET, SPI and RX\TX ports of the MCU; the input end of the SBC module is also connected to one end of the ZONE-F (body controller) through CANH and CANL, and a terminal matching resistor is connected in parallel to the output end of the SBC; the other output ends of the SBC can also be used to output 5V voltage. The input end of the BOOST circuit and the input end of the BUCK circuit are respectively connected to one end of the EMC (filter circuit); the other end of the EMC (filter circuit) is connected to the ZONE-F (body controller) through a switch and an anti-reverse connection device, wherein the lines from the ZONE-F (body controller) to the SBC, and from the ZONE-F to the BOOST circuit or the BUCK circuit are connected using the KL30 power supply + (CAN network line) to obtain communication with the vehicle control network. Among them, CC channels 1-6 inside BOOST and CV channels 1-2 of BUCK circuit are connected by KL30; CC channels 1-6 in BOOST circuit and BUCK circuit are also connected by KL30.

[0076] The other end of ZONE-F is grounded; the other input end of SBC (power input end) is also connected to the KL30 line between ZONE-F and the switch and anti-reverse connection device through a diode. Among them, CH1 and CH2 are connected end to end through the KL30 line; the input end of the BOOST circuit and the input end of the channel CC1-6 in the BUCK circuit are connected through KL30 respectively;

[0077] The DCDC boost constant voltage chip is connected to the MCU via the SPI interface. The DCDC boost constant voltage chip is a boost circuit. The BOOST circuit includes CH1 and CH2 which are connected in sequence at the first position.

[0078] The DCDC step-down constant current chip is connected to the MCU via the SPI interface; the DCDC step-down constant current chip is a CC mode BUCK circuit, wherein the BUCK circuit includes a BUCK1 CC channel-BUCK6CC channel; the DCDC constant voltage chip is a CV mode BUCK circuit; wherein the CC mode BUCK circuit includes a BUCK1 CV channel and a BUCK2CV channel;

[0079] In this specific embodiment, a MCU driver is used to simultaneously control and load the left and right front combination headlights through a constant current + constant voltage driving mode, wherein the constant current + constant voltage driving mode is: a DC-DC driving topology mode, specifically including:

[0080] The left and right lights of the car adopt a driving method that combines CC mode and CV mode.

[0081] Among them, CC mode (boost+buck) driving mode; specifically includes:

[0082] After the voltage is boosted by the front-end boost circuit, the back-end buck circuit performs a step-down constant current drive to achieve constant current output of CC channels (BUCK1 CC channel - BUCK6 CC channel). CC channels 1-6 can be arbitrarily assigned to the left and right lights of the car to drive the high and low beam lights and turn signal lights of the left and right lights of the car to light up. Among them, any channel in CC channels 1-6 outputs a constant current of 0.1-1.5A (5%-100%).

[0083] In CV mode, the buck drive mode is used directly, and the constant voltage output is directly output through the buck circuit (including channels BUCK1 CC and BUCKCC2), which is arbitrarily distributed to different signal lights, and then the LED light board in the signal light has its own constant current drive to achieve lighting. Among them, the signal lights can include: left and right lights and center grid lights.

[0084] Among them, CV channels 1-2 each output a constant voltage of 3V-VCC (MAX7A), that is, CV channels 1-2 each output a constant voltage of 3V-battery voltage, and the current does not exceed 7A.

[0085] The wiring form of the connecting lines between the structures is as follows Figure 3 As shown, experiments have proved that this type of wiring can minimize electromagnetic interference and ensure system performance.

[0086] The frameworks of the aforementioned specific embodiments all further include a 60pin connector.

[0087] Secondly, according to an embodiment of the present utility model, a drive control device is also provided, comprising: the vehicle light drive control circuit PCBA system according to the second aspect of the present utility model; the drive control device also includes:

[0088] A drive box upper cover, a drive box lower cover and a connecting device;

[0089] Wherein, the drive control circuit PCBA is formed on the lower cover of the drive box; the upper cover of the drive box is connected to the lower cover of the drive box through the connecting device to form the drive control device, thereby achieving the functions of anti-bump, dustproof and waterproof.

[0090] In addition, according to an embodiment of the present utility model, there is also provided a vehicle, comprising the drive control device described in any one of the third aspects of the present utility model.

[0091] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A car light drive control circuit PCBA, characterized in that: include: A PCB circuit board, and a headlight driving control circuit formed on the PCB circuit board; wherein the headlight driving control circuit comprises: A control module, a DCDC current and voltage regulating module, an SBC module, an LDO module, a high-side switch module, a low-side switch module, a motor drive module and a CAN transceiver module; wherein the control terminals of the control module are respectively connected to one end of the DCDC current and voltage regulating module, the SBC module, the high-side switch module, the low-side switch module, the motor drive module and the CAN transceiver module; Wherein, the control module is used to drive and control the left and right lights of the car; The DCDC current and voltage regulating module includes: a DCDC constant voltage chip, and the DCDC constant voltage chip is used to input a front-end voltage; the DCDC current and voltage regulating module is used to process the front-end voltage of the vehicle light driving control circuit through the DCDC constant voltage chip and output a constant voltage, and to drive the left vehicle light or / and the right vehicle light with a constant current driving function of the left vehicle light or / and the right vehicle light.

2. The vehicle light driving control circuit PCBA according to claim 1, characterized in that: The DCDC current and voltage regulation module also includes: DCDC boost constant voltage chip, DCDC buck constant current chip; wherein the DCDC boost constant voltage chip and the DCDC buck constant current chip are respectively connected to a control end of the control module; the DCDC boost constant voltage chip is used to input the front-end voltage; Among them, the DCDC current and voltage regulation module is used to boost the front-end voltage of the car light driving control circuit through the DCDC boost constant voltage chip, and after the DCDC buck constant current chip bucks the constant current drive, it outputs a constant current to drive the left light or the right light of the car.

3. The vehicle light driving control circuit PCBA as claimed in claim 2, characterized in that: In the vehicle light driving control circuit, the electromagnetic interference level generated by the wiring method of the circuit on the PCB circuit board is adapted to the first electromagnetic interference limit of the vehicle light driving control circuit.

4. A car light drive control circuit PCBA system, characterized in that: The vehicle light driving control circuit PCBA system comprises the vehicle light driving control circuit PCBA system according to any one of claims 1 to 3, wherein the vehicle light driving control circuit PCBA system further comprises: The automotive CEM module is connected to the control module in the drive control circuit PCBA through a set of CAN network lines, so that one of the control modules and the automotive CEM module communicate and interact through the set of CAN network lines; A voltage-dividing network; the voltage-dividing network and the automobile CEM module are respectively connected to one end of the control module.

5. A drive control device, characterized in that: include: The vehicle light drive control circuit PCBA system as claimed in claim 4; The drive control device also includes: A drive box upper cover, a drive box lower cover and a connecting device; Wherein, the drive control circuit PCBA is formed on the lower cover of the drive box; the upper cover of the drive box is connected to the lower cover of the drive box through the connecting device to form the drive control device.

6. A car, characterized in that: Includes the drive control device as described in claim 5.

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