Vehicle gauge level LED drive control circuit and system and vehicle lamp

Abstract

The invention relates to the technical field of circuits, and discloses a vehicle-gauge-level LED drive control circuit and system and a vehicle lamp, and the vehicle-gauge-level LED drive control circuit comprises a power supply module, a drive module, an LED module and a control module; the power supply module is connected with the LED module, the driving module and the control module; and the driving module is connected with the control module and the LED module. According to the vehicle-gauge-level LED driving control circuit, the LED driving circuit can adapt to various different environments by adopting various vehicle-gauge-level chips, and the vehicle-gauge-level LED driving control circuit has protection measures such as overvoltage, overcurrent and short circuit to prevent the LED from being damaged, so that the reliability of a system is improved.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to an automotive-grade LED drive control circuit, system and vehicle lamp. Background Art

[0002] Automotive-grade chips are indispensable components in the process of automotive electrification and intelligence. With the rapid growth of smart car data, the demand for high-performance chips has also increased significantly. Automotive constant-current LED driver chips are currently a hot topic in automotive lighting applications and have already occupied a place in automotive electronic systems. LED lighting is increasingly used in automobiles, playing important roles such as lighting, indication, and atmosphere decoration. However, due to the complexity and harshness of the automotive operating environment, LED circuits are often subject to various interferences and challenges.

[0003] As an important component of the automotive lighting system, automotive-grade LED chips have increasingly higher design requirements and need to have high reliability, high stability, and high safety. In order to ensure the normal operation of the LED circuit in the car and avoid the risks of system failure and random hardware failure, it is urgent to study a highly reliable and safe LED driver circuit specifically for automotive applications. Summary of the invention

[0004] The purpose of this application is to provide an automotive-grade LED drive control circuit, system and car light, aiming to solve the technical problem of low safety of existing automotive-grade LED drive circuits.

[0005] To achieve the above-mentioned purpose, the present application proposes a vehicle-grade LED drive control circuit, the vehicle-grade LED drive control circuit comprising: a power supply module, a drive module, an LED module and a control module;

[0006] The power supply module is connected to the LED module, the driving module and the control module; the driving module is connected to the control module and the LED module;

[0007] The control module is used to send a first start signal to the power supply module and send a second start signal to the drive module after receiving a first voltage signal input from the outside;

[0008] The power supply module is used to receive the first start signal and provide a bias voltage for the driving module and the LED module;

[0009] The driving module is used to receive the second start signal and the bias voltage and transmit a driving current to the LED module;

[0010] The LED module is used to receive the bias voltage and the driving current to control the LED to turn on and off.

[0011] In one embodiment, the automotive-grade LED drive control circuit further includes: an external power supply module;

[0012] The external power supply module is connected to the power supply module;

[0013] The external power supply module is used to send the first voltage signal to the power supply module.

[0014] In one embodiment, the automotive-grade LED drive control circuit further includes: a buck module;

[0015] The step-down module is connected to the external power supply module and the control module;

[0016] The voltage reduction module is used to reduce the voltage of the first voltage signal into a working signal and transmit it to the control module.

[0017] In one embodiment, the power supply module includes: a first control chip, an inductor, first to tenth resistors, and first to tenth capacitors;

[0018] The first end, the sixth end and the eleventh end of the first control chip are all grounded; the second end of the first control chip is connected to the tenth end of the first control chip, the first end of the second resistor, the first end of the fifth capacitor, the first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor and the external power supply module; the third end of the first control chip is connected to the first end of the first resistor; the fourth end of the first control chip is connected to the first end of the fourth resistor; the fifth end of the first control chip is connected to the first end of the tenth capacitor and the first end of the sixth resistor; the seventh end of the first control chip is connected to the second end of the third resistor, the first end of the ninth resistor, the second end of the fourth capacitor, the second end of the fourth resistor and the first end of the ninth capacitor; the eighth end of the first control chip is connected to the first end of the seventh resistor and the second end of the sixth resistor; the ninth end of the first control chip is connected to the second end of the second resistor, the second end of the fifth resistor and the first end of the eighth resistor; the twelfth end of the first control chip is connected to the second end of the first capacitor and the first end of the inductor;

[0019] The second end of the first resistor is connected to the first end of the first capacitor; the first end of the third resistor is connected to the second end of the inductor, the first end of the second capacitor, the first end of the third capacitor, the first end of the fourth capacitor, the driving module and the LED module; the second end of the fourth resistor is connected to the second end of the ninth capacitor and the driving module; the first end of the fifth resistor is connected to the forty-fifth end of the control module; the second end of the seventh resistor is connected to the forty-sixth end of the control module; the second end of the eighth resistor is grounded; the second end of the ninth resistor is grounded; the second end of the tenth resistor is grounded;

[0020] The second end of the second capacitor is connected to the second end of the third capacitor and is grounded; the second end of the fifth capacitor is connected to the second end of the sixth capacitor, the second end of the seventh capacitor and the second end of the eighth capacitor and is grounded; the second end of the ninth capacitor and the second end of the tenth capacitor are grounded respectively.

[0021] In one embodiment, the driving module includes: a second control chip, an eleventh resistor to a twenty-second resistor, and an eleventh capacitor to a fourteenth capacitor;

[0022] The first end of the second control chip is connected to the first end of the twelfth capacitor, the first end of the thirteenth capacitor and the external power supply; the second end of the second control chip is connected to the first end of the eleventh resistor; the third end, the tenth end, the fifteenth end and the twenty-second end of the second control chip are grounded; the plurality of LED connection ends of the second control chip are connected to the LED module; the twenty-third end of the second control chip is connected to the second end of the fourth resistor; the twenty-fourth end of the second control chip is connected to the first end of the twenty-first resistor; the twenty-seventh end of the second control chip is connected to the first end of the fifteenth resistor and the first end of the eighteenth resistor; the twenty-eighth end of the second control chip is connected to the first end of the sixteenth resistor and the first end of the nineteenth resistor; the twenty-ninth end of the second control chip is connected to the second end of the fourteenth resistor and the forty-fourth end of the control module; the thirtieth end of the second control chip is connected to the second end of the eleventh capacitor and the second end of the thirteenth resistor; the thirty-first end of the second control chip is connected to the first end of the fourth capacitor and the second end of the fourteenth capacitor; the thirty-second end of the second control chip is connected to the first end of the seventeenth resistor and the first end of the twentieth resistor;

[0023] The second end of the eleventh resistor is grounded; the first end of the thirteenth resistor is connected to the forty-third end of the control module; the first end of the fourteenth resistor is connected to the external power supply; the second end of the fifteenth resistor is connected to the second end of the sixteenth resistor and the second end of the seventeenth resistor and is grounded; the second end of the eighteenth resistor is connected to the second end of the nineteenth resistor and the second end of the twentieth resistor and is connected to the external power supply; the second end of the twenty-first resistor is connected to the first end of the twenty-second resistor; the second end of the twenty-second resistor is grounded;

[0024] The first end of the eleventh capacitor is grounded; the second end of the twelfth capacitor is connected to the second end of the thirteenth capacitor and is grounded; and the first end of the fourteenth capacitor is grounded.

[0025] In one embodiment, the LED module includes: a fifteenth capacitor, a sixteenth capacitor, and a plurality of light strings, each light string consisting of a plurality of light beads connected in series;

[0026] The first end of each group of light strings is connected to the corresponding LED connection end of the second control chip;

[0027] The second end of each group of light strings is connected to the first end of the fourth capacitor, the first end of the fifteenth capacitor and the first end of the sixteenth capacitor;

[0028] The first end of the fifteenth capacitor is connected to the first end of the fourth capacitor and the first end of the sixteenth capacitor; the second end of the fifteenth capacitor is connected to the second end of the sixteenth capacitor and is grounded.

[0029] In one embodiment, the automotive-grade LED drive control circuit further includes: a differential drive module;

[0030] Two ends of the differential driving module are respectively connected to two different ports of the control module;

[0031] The differential driving module is used to receive and process the logic program input from the outside, and send the processed logic program to the control module;

[0032] The control module is also used to control the opening and closing of the power supply module and the driving module according to the processed logic program.

[0033] In one embodiment, the automotive-grade LED drive control circuit further includes: a CAN drive module;

[0034] The two ends of the CAN driver module are respectively connected to two different ports of the control module;

[0035] The CAN driving module is used to realize data transmission between the control module and the power supply module, and between the driving module and the LED module.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes an automotive-grade LED drive control system, which includes the automotive-grade LED drive control circuit as described above.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle lamp, which includes the automotive-grade LED drive control circuit as described above.

[0038] The present application proposes an automotive-grade LED drive control circuit, which includes: a power supply module, a drive module, an LED module and a control module; the power supply module is connected to the LED module, the drive module and the control module; the drive module is connected to the control module and the LED module; the control module is used to send a first start signal to the power supply module and a second start signal to the drive module after receiving an external first voltage signal; the power supply module is used to receive the first start signal and provide a bias voltage for the drive module and the LED module; the drive module is used to receive the second start signal and the bias voltage and transmit the drive current to the LED module; the LED module is used to receive the bias voltage and the drive current to control the LED on and off. By adopting a variety of automotive-grade chips, the LED drive circuit can adapt to a variety of different environments, and the automotive-grade LED drive control circuit has overvoltage, overcurrent, short circuit and other protection measures to prevent LED damage and improve the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a module schematic diagram of the first embodiment of the automotive-grade LED drive control circuit proposed in this application;

[0040] Figure 2 This is a module schematic diagram of the second embodiment of the automotive-grade LED drive control circuit proposed in this application;

[0041] Figure 3 This is a first circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application;

[0042] Figure 4 This is a second circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application;

[0043] Figure 5 This is the third circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application.

[0044] Description of Figure Numbers:

[0045] Label name Label name 100 Power supply module 800 CAN driver module 200 Driver module R1~R22 The first to twenty-second resistors 300 LED Modules C1~C16 The first to sixteenth capacitors 400 Control Module L1 Inductors 500 External power supply module U1 First control chip 600 Buck Module U2 Second control chip 700 Differential drive module DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0050] Reference Figure 1 , Figure 1 This is a module diagram of the first embodiment of the automotive-grade LED drive control circuit proposed in this application. Figure 1 The first embodiment of the automotive-grade LED drive control circuit of the present application is proposed.

[0051] The automotive-grade LED driving control circuit includes: a power supply module 100, a driving module 200, an LED module 300 and a control module 400; the power supply module 100 is connected to the LED module 300, the driving module 200 and the control module 400; the driving module 200 is connected to the control module 400 and the LED module 300.

[0052] It should be understood that the power supply module 100 provides a stable power supply for the entire LED driving control circuit. The power supply module 100 is connected to the LED module 300, the driving module 200 and the control module 400 to ensure that these modules can work normally.

[0053] It should be noted that the driver module 200 receives the instruction of the control module 400, adjusts the current and voltage, and drives the LED module 300 to emit light. It usually has functions such as overcurrent and overvoltage protection to ensure the stable operation of the LED and extend the service life. One end of the driver module 200 is connected to the control module 400 to receive the control signal; the other end is connected to the LED module 300 to provide appropriate current and voltage.

[0054] It should be understood that the LED module 300, as a light-emitting element, emits light according to the current and voltage provided by the driving module 200. The LED module 300 receives power from the power supply module 100 and current and voltage control from the driving module 200.

[0055] It should be noted that the control module 400 is responsible for receiving external signals (such as vehicle signal light control signals) and adjusting the working state of the driving module 200 according to these signals, thereby controlling the brightness and color of the LED module 300. The control module 400 is connected to the power supply module 100 to obtain power, and is also connected to the driving module 200 to send control signals.

[0056] The control module 400 is used to send a first start signal to the power supply module 100 and send a second start signal to the driving module 200 after receiving a first voltage signal input from the outside.

[0057] It should be noted that the control module 400 is the hub of the entire circuit and is responsible for receiving the first voltage signal input from the outside. This signal may come from other electronic control units (ECUs) of the vehicle or the driver's operation (such as a switch signal). When the control module 400 receives the first voltage signal, it will send a first start signal to the power supply module 100 to activate the power supply module 100; at the same time, the control module 400 will also send a second start signal to the drive module 200 to inform the drive module 200 to prepare to start working.

[0058] The power supply module 100 is used to receive the first start signal and provide a bias voltage for the driving module 200 and the LED module 300 .

[0059] It should be understood that the main responsibility of the power supply module 100 is to provide a stable power supply, including a bias voltage, to the driver module 200 and the LED module 300. The bias voltage is a reference voltage required for the normal operation of the LED module 300. After receiving the first start signal from the control module 400, the power supply module 100 starts to work and provides the required bias voltage to the driver module 200 and the LED module 300. This bias voltage enables the driver module 200 and the LED module 300 to be in a standby state, ready to receive further instructions.

[0060] The driving module 200 is used to receive the second start signal and the bias voltage and transmit a driving current to the LED module 300 .

[0061] It should be noted that the driver module 200 is responsible for adjusting the current according to the instructions of the control module 400 to drive the LED module 300 to emit light. It is also responsible for protecting the LED module 300 from damage due to overcurrent and overvoltage. After receiving the second start signal from the control module 400 and the bias voltage provided by the power supply module 100, the driver module 200 starts to deliver the drive current to the LED module 300. The size and characteristics of the drive current depend on the specific requirements of the LED module 300.

[0062] The LED module 300 is used to receive the bias voltage and the driving current to control the LED to turn on and off.

[0063] It should be understood that the LED module 300 is the output part of the circuit, which is responsible for lighting or extinguishing according to the received current and voltage. After receiving the bias voltage provided by the power supply module 100 and the driving current delivered by the driving module 200, the LED module 300 controls the lighting of the LED according to these electrical signals. If the driving current exists, the LED will light up; if the driving current is cut off, the LED will turn off.

[0064] The present embodiment proposes an automotive-grade LED drive control circuit, which includes: a power supply module 100, a drive module 200, an LED module 300 and a control module 400; the power supply module 100 is connected to the LED module 300, the drive module 200 and the control module 400; the drive module 200 is connected to the control module 400 and the LED module 300; the control module 400 is used to send a first start signal to the power supply module 100 and send a second start signal to the drive module 200 after receiving an external first input voltage signal; the power supply module 100 is used to receive the first start signal and provide a bias voltage for the drive module 200 and the LED module 300; the drive module 200 is used to receive the second start signal and the bias voltage and transmit a drive current to the LED module 300; the LED module 300 is used to receive the bias voltage and the drive current to control the LED to turn on and off. By adopting a variety of automotive-grade chips, the LED drive circuit can adapt to a variety of different environments. The automotive-grade LED drive control circuit has overvoltage, overcurrent, short circuit and other protection measures to prevent LED damage and improve system reliability.

[0065] Reference Figure 2 , Figure 2 This is a module diagram of the second embodiment of the automotive-grade LED drive control circuit proposed in this application. Based on the first embodiment of the automotive-grade LED drive control circuit, the second embodiment of the automotive-grade LED drive control circuit of this application is proposed.

[0066] The automotive-grade LED drive control circuit also includes: an external power supply module 500 ; the external power supply module 500 is connected to the power supply module 100 ; the external power supply module 500 is used to send the first voltage signal to the power supply module 100 .

[0067] It should be noted that the external power supply module 500 is the external power input part of the entire LED drive control circuit. It is responsible for converting the vehicle's main power supply (such as a 12V or 24V DC power supply) into the first voltage signal required by the circuit. This signal is usually a lower voltage and is suitable for use in electronic control circuits. The external power supply module 500 is connected to the power supply module to provide it with power input. The external power supply module 500 sends a first voltage signal to the power supply module. This signal is the basis for the power supply module to start and work. After receiving the first voltage signal from the external power supply module 500, the power supply module converts it into the bias voltage required by other modules in the circuit (such as the drive module 200 and the LED module 300).

[0068] The automotive-grade LED drive control circuit also includes: a buck module 600; the buck module 600 is connected to the external power supply module 500 and the control module 400; the buck module 600 is used to buck the first voltage signal into a working signal to the control module 400.

[0069] It should be understood that the main function of the step-down module 600 is to reduce the first voltage signal (usually a higher voltage, such as 12V or 24V of the vehicle battery) provided by the external power supply module 500 to a voltage level suitable for the operation of the control module 400. This working signal is usually a lower voltage, such as 5V or 3.3V, which is the standard working voltage of most electronic control circuits. The step-down module 600 connects the external power supply module 500 and the control module 400. It receives the first voltage signal from the external power supply module 500 and outputs it to the control module 400 after stepping it down. The step-down module 600 receives the first voltage signal from the external power supply module 500. The step-down module 600 steps down the first voltage signal into a working signal and sends it to the control module 400.

[0070] The automotive-grade LED drive control circuit further includes: a differential drive module 700; two ends of the differential drive module 700 are respectively connected to two different ports of the control module 400;

[0071] The differential driving module 700 is used to receive and process the logic program input from the outside, and send the processed logic program to the control module 400; the control module 400 is also used to control the opening and closing of the power supply module 100 and the driving module 200 according to the processed logic program.

[0072] It should be noted that the differential drive module 700 is used to receive external input logic programs, which may contain control information such as the on and off mode of the LED, brightness adjustment, and flickering frequency. The differential drive module 700 processes these logic programs to ensure that the signal has a higher anti-interference ability during transmission, especially in an automotive environment with severe electromagnetic interference (EMI). The two ends of the differential drive module 700 are respectively connected to two different ports of the control module 400, which are usually differential pair interfaces that can receive differential signals. The differential drive module 700 receives the external input logic program and processes it. The processed logic program is sent to the control module 400 in the form of a differential signal.

[0073] It should be understood that, in addition to sending a start signal to the power supply module 100 and the driver module 200, the control module 400 now also controls the power supply module 100 and the driver module 200 to turn on and off according to the logic program processed by the differential driver module 700. This means that the control module 400 can adjust the working state of the LED module 300 according to the received logic program, such as changing the brightness, achieving dynamic lighting effects, or adjusting the behavior of the LED according to the vehicle state (such as steering, braking, etc.).

[0074] The automotive-grade LED drive control circuit further includes: a CAN drive module 800; one end of the CAN drive module 800 is respectively connected to the power supply module 100, the power supply module 100 and the LED module 300, and the other end of the CAN drive module 800 is connected to the control module 400;

[0075] The CAN driving module 800 is used to realize data transmission between the control module 400 and the power supply module 100 , and between the power supply module 100 and the LED module 300 .

[0076] It should be noted that the CAN driver module 800 is part of the controller area network (Controller Area Network), which is used to realize data communication between the control module 400 and the power supply module 100, the power supply module 100 and the LED module 300. The CAN bus is a high-performance communication protocol widely used in automotive electronic systems, which can effectively support communication between multiple network nodes. One end of the CAN driver module 800 is connected to the power supply module 100, the power supply module 100 and the LED module 300, respectively, and the other end is connected to the control module 400. In this way, it forms a bridge for data transmission, so that the control module 400 can monitor and command other modules. The CAN driver module 800 allows the control module 400 to send control commands and data to the power supply module 100, the power supply module 100 and the LED module 300. At the same time, it also allows these modules to feed back status information, fault codes or other data to the control module 400 for real-time monitoring and management.

[0077] In this embodiment, the power supply module 100 is responsible for providing the required voltage for the power supply module 100 and the LED module 300. The power supply module 100 is responsible for converting the external input voltage into the voltage required by the control module 400. The control module 400 is responsible for converting the external input logic program and controlling the power supply module 100 and the opening and closing of the power supply module 100. The CAN drive module 800 and the differential drive module 700 both use automotive-grade interface chips, which are used between the CAN protocol controller and the physical bus. By adopting a variety of automotive-grade chips, the LED drive circuit can adapt to a variety of different environments, and the automotive-grade LED drive control circuit has overvoltage, overcurrent, short circuit and other protection measures to prevent LED damage and improve the reliability of the system. At the same time, it has a variety of dimming modes, which can be configured and adjusted according to the selection.

[0078] Reference Figure 3 , Figure 4 and Figure 5 , Figure 3 This is the first circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application. Figure 4 This is the second circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application. Figure 5 The third circuit connection diagram of the third embodiment of the automotive-grade LED drive control circuit proposed in this application. Based on the first and second embodiments of the automotive-grade LED drive control circuit mentioned above, the third embodiment of the automotive-grade LED drive control circuit of this application is proposed.

[0079] The power supply module 100 includes: a first control chip U1, an inductor L1, first resistors R1 to R10, and first capacitors C1 to C10;

[0080] It should be noted that the first end, the sixth end and the eleventh end of the first control chip U1 are all grounded; the second end of the first control chip U1 is connected to the tenth end of the first control chip U1, the first end of the second resistor R2, the first end of the fifth capacitor C5, the first end of the sixth capacitor C6, the first end of the seventh capacitor C7, the first end of the eighth capacitor C8 and the external power supply module 500; the third end of the first control chip U1 is connected to the first end of the first resistor R1; the fourth end of the first control chip U1 is connected to the first end of the fourth resistor R4; the first control chip The fifth end of the first control chip U1 is connected to the first end of the tenth capacitor C10 and the first end of the sixth resistor R6; the seventh end of the first control chip U1 is connected to the second end of the third resistor R3, the first end of the ninth resistor R9, the second end of the fourth capacitor C4, the second end of the fourth resistor R4 and the first end of the ninth capacitor C9; the eighth end of the first control chip U1 is connected to the first end of the seventh resistor R7 and the second end of the sixth resistor R6; the ninth end of the first control chip U1 is connected to the second end of the second resistor R2, the second end of the fifth resistor R5 and the eighth resistor R 8; the twelfth end of the first control chip U1 is connected to the second end of the first capacitor C1 and the first end of the inductor L1; the second end of the first resistor R1 is connected to the first end of the first capacitor C1; the first end of the third resistor R3 is connected to the second end of the inductor L1, the first end of the second capacitor C2, the first end of the third capacitor C3, the first end of the fourth capacitor C4, the power supply module 100 and the LED module 300; the second end of the fourth resistor R4 is connected to the second end of the ninth capacitor C9 and the power supply module 100; the first end of the fifth resistor R5 is connected to the The second end of the seventh resistor R7 is connected to the forty-fifth end of the control module 400; the second end of the seventh resistor R7 is connected to the forty-sixth end of the control module 400; the second end of the eighth resistor R8 is grounded; the second end of the ninth resistor R9 is grounded; the second end of the tenth resistor R10 is grounded; the second end of the second capacitor C2 is connected to the second end of the third capacitor C3 and is grounded; the second end of the fifth capacitor C5 is connected to the second end of the sixth capacitor C6, the second end of the seventh capacitor C7 and the second end of the eighth capacitor C8 and is grounded; the second end of the ninth capacitor C9 and the second end of the tenth capacitor C10 are grounded respectively.

[0081] It should be understood that the first control chip U1 is ATI3603, the control module 400 adopts KF32A158MQT chip, the ATI3603 chip is connected to the PF6 port of the KF32A158MQT chip through the fifth resistor R5, and the ATI3603 chip is connected to the PF8 port of the KF32A158MQT chip through the seventh resistor R7.

[0082] The power supply module 100 includes: a second control chip U2, an eleventh resistor R11 to a twenty-second resistor R22, and an eleventh capacitor C11 to a fourteenth capacitor C14;

[0083] It should be noted that the first end of the second control chip U2 is connected to the first end of the twelfth capacitor C12, the first end of the thirteenth capacitor C13 and the external power supply; the second end of the second control chip U2 is connected to the first end of the eleventh resistor R11; the third end, the tenth end, the fifteenth end and the twenty-second end of the second control chip U2 are grounded; the multiple LED connection ends of the second control chip U2 are connected to the LED module 300; the twenty-third end of the second control chip U2 is connected to the second end of the fourth resistor R4; the twenty-fourth end of the second control chip U2 is connected to the first end of the twenty-first resistor R21; the twenty-seventh end of the second control chip U2 is connected to the first end of the fifteenth resistor R15 and the first end of the eighteenth resistor R18; the twenty-eighth end of the second control chip U2 is connected to the first end of the sixteenth resistor R16 and the first end of the nineteenth resistor R19; the twenty-ninth end of the second control chip U2 is connected to the second end of the fourteenth resistor R14 and the forty-fourth end of the control module 400; the thirtieth end of the second control chip U2 is connected to the second end of the eleventh capacitor C11 and the tenth The second end of the third resistor R13; the thirty-first end of the second control chip U2 is connected to the first end of the fourth capacitor C4 and the second end of the fourteenth capacitor C14; the thirty-second end of the second control chip U2 is connected to the first end of the seventeenth resistor R17 and the first end of the twentieth resistor R20; the second end of the eleventh resistor R11 is grounded; the first end of the thirteenth resistor R13 is connected to the forty-third end of the control module 400; the first end of the fourteenth resistor R14 is connected to the external power supply; the second end of the fifteenth resistor R15 is connected to the sixteenth resistor The second end of R16 and the second end of the seventeenth resistor R17 are grounded; the second end of the eighteenth resistor R18 is connected to the second end of the nineteenth resistor R19 and the second end of the twentieth resistor R20 and connected to the external power supply; the second end of the twenty-first resistor R21 is connected to the first end of the twenty-second resistor R22; the second end of the twenty-second resistor R22 is grounded; the first end of the eleventh capacitor C11 is grounded; the second end of the twelfth capacitor C12 is connected to the second end of the thirteenth capacitor C13 and grounded; the first end of the fourteenth capacitor C14 is grounded.

[0084] It should be understood that the second control chip U2 model is ATI81816M200, the 29 (FS) port of the ATI81816M200 chip is connected to the PF5 port of the KF32A158MQT chip, and the ATI81816M200 chip is connected to the PF3 port of the KF32A158MQT chip through the thirteenth resistor R13.

[0085] The LED module 300 includes: a fifteenth capacitor C15, a sixteenth capacitor C16 and multiple groups of light strings, each group of light strings is composed of multiple lamp beads connected in series; the first end of each group of light strings is connected to the corresponding LED connection end on the second control chip U2; the second end of each group of light strings is connected to the first end of the fourth capacitor C4, the first end of the fifteenth capacitor C15 and the first end of the sixteenth capacitor C16; the first end of the fifteenth capacitor C15 is connected to the first end of the fourth capacitor C4 and the first end of the sixteenth capacitor C16; the second end of the fifteenth capacitor C15 is connected to the second end of the sixteenth capacitor C16 and is grounded.

[0086] It should be understood that the first end of the first group of light strings is connected to the fourth end of the second control chip U2; the first end of the second group of light strings is connected to the fifth end of the second control chip U2; the first end of the third group of light strings is connected to the sixth end of the second control chip U2; the first end of the fourth group of light strings is connected to the seventh end of the second control chip U2; the first end of the fifth group of light strings is connected to the eighth end of the second control chip U2; the first end of the sixth group of light strings is connected to the ninth end of the second control chip U2; the first end of the seventh group of light strings is connected to the eleventh end of the second control chip U2; the first end of the eighth group of light strings is connected to the twelfth end of the second control chip U2; the first end of the ninth group of light strings is connected to the thirteenth end of the second control chip U2; the first end of the tenth group of light strings is connected to the eleventh end of the second control chip U2 Fourteenth terminal; the first end of the eleventh group of light strings is connected to the sixteenth terminal of the second control chip U2; the first end of the twelfth group of light strings is connected to the seventeenth terminal of the second control chip U2; the first end of the fifteenth capacitor C15 is connected to the first end of the fourth capacitor C4, the first end of the sixteenth capacitor C16, two ends of the first group of light strings, the second end of the second group of light strings, the second end of the third group of light strings, the second end of the fourth group of light strings, the second end of the fifth group of light strings, the second end of the sixth group of light strings, the second end of the seventh group of light strings, the second end of the eighth group of light strings, the second end of the ninth group of light strings, the second end of the tenth group of light strings, the second end of the eleventh group of light strings and the second end of the twelfth group of light strings; the second end of the fifteenth capacitor C15 is connected to the second end of the sixteenth capacitor C16 and is grounded.

[0087] In this embodiment, when the external input first voltage signal is 12V, the KF32A158MQT chip controls the start of the ATI3603 chip and the ATI816M200 chip. After the ATI3603 chip is turned on, the power supply module 100 will be started, and the first voltage signal will be reduced to 9V, which is the working voltage. The working voltage will be transmitted to the anode of the LED lamp bead and the external power supply interface (5V) of the ATI81816M200 chip. After the ATI81816M200 chip is started, the power supply module 100 connected to the LED lamp bead part pin will output 125mA current. In the absence of written logic, the power supply module 100 and the power supply module 100 are started, and the LED lamp bead will be on for a long time. After writing the logic control, different on and off modes such as the revolving lantern can be realized.

[0088] In addition, the present application also proposes an automotive-grade LED drive control system, which includes the automotive-grade LED drive control circuit as described above. Since the automotive-grade LED drive control system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0089] In addition, the present application also proposes a vehicle lamp, which includes the above-mentioned automotive-grade LED drive control circuit. Since the vehicle lamp adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0090] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0091] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An automotive-grade LED drive control circuit, characterized in that: The automotive-grade LED drive control circuit includes: a power supply module, a drive module, an LED module and a control module; The power supply module is connected to the LED module, the driving module and the control module; the driving module is connected to the control module and the LED module; The control module is used to send a first start signal to the power supply module and send a second start signal to the drive module after receiving a first voltage signal input from the outside; The power supply module is used to receive the first start signal and provide a bias voltage for the driving module and the LED module; The driving module is used to receive the second start signal and the bias voltage and transmit a driving current to the LED module; The LED module is used to receive the bias voltage and the driving current to control the LED to turn on and off.

2. The automotive-grade LED drive control circuit according to claim 1, characterized in that: The automotive-grade LED drive control circuit further includes: an external power supply module; The external power supply module is connected to the power supply module; The external power supply module is used to send the first voltage signal to the power supply module.

3. The automotive-grade LED drive control circuit according to claim 2, characterized in that: The automotive-grade LED drive control circuit further includes: a buck module; The step-down module is connected to the external power supply module and the control module; The voltage reduction module is used to reduce the voltage of the first voltage signal into a working signal and transmit it to the control module.

4. The automotive-grade LED drive control circuit according to claim 2, characterized in that: The power supply module includes: a first control chip, an inductor, first to tenth resistors, and first to tenth capacitors; The first end, the sixth end and the eleventh end of the first control chip are all grounded; the second end of the first control chip is connected to the tenth end of the first control chip, the first end of the second resistor, the first end of the fifth capacitor, the first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor and the external power supply module; the third end of the first control chip is connected to the first end of the first resistor; the fourth end of the first control chip is connected to the first end of the fourth resistor; the fifth end of the first control chip is connected to the first end of the tenth capacitor and the first end of the sixth resistor; the seventh end of the first control chip is connected to the second end of the third resistor, the first end of the ninth resistor, the second end of the fourth capacitor, the second end of the fourth resistor and the first end of the ninth capacitor; the eighth end of the first control chip is connected to the first end of the seventh resistor and the second end of the sixth resistor; the ninth end of the first control chip is connected to the second end of the second resistor, the second end of the fifth resistor and the first end of the eighth resistor; the twelfth end of the first control chip is connected to the second end of the first capacitor and the first end of the inductor; The second end of the first resistor is connected to the first end of the first capacitor; the first end of the third resistor is connected to the second end of the inductor, the first end of the second capacitor, the first end of the third capacitor, the first end of the fourth capacitor, the driving module and the LED module; the second end of the fourth resistor is connected to the second end of the ninth capacitor and the driving module; the first end of the fifth resistor is connected to the forty-fifth end of the control module; the second end of the seventh resistor is connected to the forty-sixth end of the control module; the second end of the eighth resistor is grounded; the second end of the ninth resistor is grounded; the second end of the tenth resistor is grounded; The second end of the second capacitor is connected to the second end of the third capacitor and is grounded; the second end of the fifth capacitor is connected to the second end of the sixth capacitor, the second end of the seventh capacitor and the second end of the eighth capacitor and is grounded; the second end of the ninth capacitor and the second end of the tenth capacitor are grounded respectively.

5. The automotive-grade LED drive control circuit according to claim 4, characterized in that: The driving module includes: a second control chip, an eleventh resistor to a twenty-second resistor, and an eleventh capacitor to a fourteenth capacitor; The first end of the second control chip is connected to the first end of the twelfth capacitor, the first end of the thirteenth capacitor and the external power supply; the second end of the second control chip is connected to the first end of the eleventh resistor; the third end, the tenth end, the fifteenth end and the twenty-second end of the second control chip are grounded; the plurality of LED connection ends of the second control chip are connected to the LED module; the twenty-third end of the second control chip is connected to the second end of the fourth resistor; the twenty-fourth end of the second control chip is connected to the first end of the twenty-first resistor; the twenty-seventh end of the second control chip is connected to the first end of the fifteenth resistor and the first end of the eighteenth resistor; the twenty-eighth end of the second control chip is connected to the first end of the sixteenth resistor and the first end of the nineteenth resistor; the twenty-ninth end of the second control chip is connected to the second end of the fourteenth resistor and the forty-fourth end of the control module; the thirtieth end of the second control chip is connected to the second end of the eleventh capacitor and the second end of the thirteenth resistor; the thirty-first end of the second control chip is connected to the first end of the fourth capacitor and the second end of the fourteenth capacitor; the thirty-second end of the second control chip is connected to the first end of the seventeenth resistor and the first end of the twentieth resistor; The second end of the eleventh resistor is grounded; the first end of the thirteenth resistor is connected to the forty-third end of the control module; the first end of the fourteenth resistor is connected to the external power supply; the second end of the fifteenth resistor is connected to the second end of the sixteenth resistor and the second end of the seventeenth resistor and is grounded; the second end of the eighteenth resistor is connected to the second end of the nineteenth resistor and the second end of the twentieth resistor and is connected to the external power supply; the second end of the twenty-first resistor is connected to the first end of the twenty-second resistor; the second end of the twenty-second resistor is grounded; The first end of the eleventh capacitor is grounded; the second end of the twelfth capacitor is connected to the second end of the thirteenth capacitor and is grounded; and the first end of the fourteenth capacitor is grounded.

6. The automotive-grade LED drive control circuit according to claim 5, characterized in that: The LED module comprises: a fifteenth capacitor, a sixteenth capacitor and a plurality of light strings, each light string being composed of a plurality of light beads connected in series; The first end of each group of light strings is connected to the corresponding LED connection end of the second control chip; The second end of each group of light strings is connected to the first end of the fourth capacitor, the first end of the fifteenth capacitor and the first end of the sixteenth capacitor; The first end of the fifteenth capacitor is connected to the first end of the fourth capacitor and the first end of the sixteenth capacitor; the second end of the fifteenth capacitor is connected to the second end of the sixteenth capacitor and is grounded.

7. The automotive-grade LED drive control circuit according to claim 1, characterized in that: The automotive-grade LED drive control circuit further includes: a differential drive module; Two ends of the differential driving module are respectively connected to two different ports of the control module; The differential driving module is used to receive and process the logic program input from the outside, and send the processed logic program to the control module; The control module is also used to control the opening and closing of the power supply module and the driving module according to the processed logic program.

8. The automotive-grade LED drive control circuit according to claim 1, characterized in that: The automotive-grade LED drive control circuit further includes: a CAN drive module; One end of the CAN driving module is connected to the power supply module, the driving module and the LED module respectively, and the other end of the CAN driving module is connected to the control module; The CAN driving module is used to realize data transmission between the control module and the power supply module, and between the driving module and the LED module.

9. An automotive-grade LED drive control system, characterized in that: The automotive-grade LED drive control system includes the automotive-grade LED drive control circuit as described in any one of claims 1 to 8.

10. A vehicle lamp, characterized in that: The vehicle lamp comprises the automotive-grade LED drive control circuit as described in any one of claims 1 to 8.

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