Automobile atmosphere lamp control circuit

Abstract

The utility model relates to the technical field of automobile atmosphere lamps, in particular to an automobile atmosphere lamp control circuit, which comprises a master control MCU (Microprogrammed Control Unit), an LDO (Low Dropout Regulator) module circuit, an LIN (Local Interconnect Network) communication module circuit, a PWM (Pulse Width Modulation) driving module circuit, a voice MIC (Microphone) control module circuit, a lamp control level conversion module circuit, a DC-DC (Direct Current-Direct Current) conversion module circuit, an input connecting end and an output connecting end, the master control MCU is connected with the LDO module circuit, the LIN communication module circuit, the PWM driving module circuit, the voice MIC control module circuit, the lamp control level conversion module circuit and the DC-DC conversion module circuit, and the LDO module circuit and the LIN communication module circuit are connected with the input connecting end. And the PWM driving module circuit and the lamp control level conversion module circuit are respectively connected with the output connecting end. The system is simple in structure, reasonable in design, high in integration level, low in cost, high in communication efficiency, capable of achieving voice communication control and complete in functionality.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile atmosphere lamps, in particular to an automobile atmosphere lamp control circuit. Background Art

[0002] As the demand for quality of life increases, people's pursuit of driving experience is also increasing, and more and more cars are equipped with ambient lights. Ambient lights can help people relieve stress and relax. At the same time, the ambient lights in the car can improve the safety of night driving to a certain extent, and are being praised by more and more people.

[0003] As we all know, the atmosphere lights are driven and controlled by the atmosphere light control circuit to adjust the brightness or present the effect of flashing and changing colors. At present, the atmosphere light circuits on the market mainly include the main control circuit, the intermediate circuit and the atmosphere light driving circuit. The structure of the intermediate circuit is relatively complex, the manufacturing cost is high, and the communication efficiency is not high. In addition, the existing atmosphere light circuit has a relatively single function and does not meet the market demand. Therefore, the inventor has improved the existing automobile atmosphere light control circuit. Utility Model Content

[0004] The purpose of the utility model is to provide a car atmosphere light control circuit, which has the advantages of simple structure, reasonable design, high integration, low cost, high communication efficiency, voice communication control, and full functionality, thereby solving the problems raised by the above technical background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a car atmosphere light control circuit, comprising a main control MCU, an LDO module circuit, a LIN communication module circuit, a PWM drive module circuit, a voice MIC control module circuit, a light control level conversion module circuit, a DC-DC conversion module circuit, an input connection end and an output connection end, the main control MCU is respectively connected to the LDO module circuit, the LIN communication module circuit, the PWM drive module circuit, the voice MIC control module circuit, the light control level conversion module circuit and the DC-DC conversion module circuit, the LDO module circuit and the LIN communication module circuit are respectively connected to the input connection end, and the PWM drive module circuit and the light control level conversion module circuit are respectively connected to the output connection end.

[0006] Preferably, the model of the main control MCU is AC6958B0 or ​​AC6958D0.

[0007] Preferably, the LDO module circuit is composed of a voltage stabilizing chip U5, a transistor U6, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a MOS tube Q1, a MOS tube Q3, a resistor R11, a resistor R14, a resistor R15, a resistor R19, a diode D2 and a diode D3, wherein the capacitor C23 and the capacitor C24 are connected in parallel, and one end of the capacitor C23 and the capacitor C24 is grounded, and the other end is connected to pin 3 of the transistor U6; pin 2 of the transistor U6 is connected to pin 1 of the voltage stabilizing chip U5, the capacitor C21 and the capacitor C22 are connected in parallel, and one end of the capacitor C21 and the capacitor C22 is grounded, and the other end is connected to pin 1 of the voltage stabilizing chip U5; the capacitor C19 and capacitor C20 are connected in parallel, and one end of capacitor C19 and capacitor C20 is grounded, and the other end is connected to MOS tube Q1 and No. 7 and No. 8 pins of voltage regulator chip U5 respectively; the two ends of resistor R11 are connected to MOS tube Q1 respectively, the two ends of resistor R14 are connected to MOS tube Q1 and MOS tube Q3 respectively, one end of capacitor C25 is grounded, and the other end is connected to resistor R11 and MOS tube Q1 respectively; both ends of resistor R19 are connected to MOS tube Q3, diode D2 and diode D3 are connected in parallel, and one end of diode D2 and diode D3 is connected to main control MCU11, and the other end is connected to resistor R15, and the end of resistor R15 away from diode D2 and diode D3 is connected to MOS tube Q3 and resistor R19 respectively.

[0008] Preferably, the LIN communication module circuit is composed of a LIN communication chip U4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R30, a resistor R31, a resistor R32, a capacitor C16, a capacitor C17, a capacitor C18 and a diode D1, wherein one end of the resistor R6, the resistor R7 and the resistor R8 is connected to a 3.3V power supply, and the other end is respectively connected to the resistor R30, the resistor R32, the resistor R31 and the No. 1, No. 4 and No. 2 pins of the LIN communication chip U4; one end of the resistor R10 is grounded, and the other end is respectively connected to the resistor R8, the resistor R31 and the No. 2 pins of the LIN communication chip U4 Pin connection; capacitor C16 and capacitor C17 are connected in parallel, and one end of capacitor C16 and capacitor C17 is grounded, and the other end is respectively connected to the 12V power supply end and pin 7 of the LIN communication chip U4; one end of capacitor C18 is grounded, and the other end is respectively connected to resistor R9 and pin 6 of the LIN communication chip U4; the end of resistor R9 away from capacitor C18 is connected to the cathode of diode D1, the anode of diode D1 is connected to pin 7 of the LIN communication chip U4, pin 8 of the LIN communication chip U4 is connected to the main control MCU, and pin 6 of the LIN communication chip U4 is also connected to the input connection terminal 18.

[0009] Preferably, the model of the LIN communication chip U4 is: CA-IF1021S-Q1.

[0010] Preferably, the PWM drive module circuit consists of a MOS tube Q2, a MOS tube Q4, a MOS tube Q5, a resistor R12, a resistor R13, a resistor R18, a resistor R20, a resistor R21, a resistor R22 and a PWM communication interface J5, wherein pins 2, 3 and 4 of the PWM communication interface J5 are respectively connected to the MOS tube Q2, the MOS tube Q4 and the MOS tube Q5, both ends of the resistor R13 are connected to the MOS tube Q2, one end of the resistor R12 is connected to the main control MCU11, and the other end is respectively connected to the resistor R13 and the MOS tube Q2; both ends of the resistor R20 are connected to the MOS tube Q4, one end of the resistor R18 is connected to the main control MCU11, and the other end is respectively connected to the resistor R20 and the MOS tube Q4; both ends of the resistor R22 are connected to the MOS tube Q5, one end of the resistor R21 is connected to the main control MCU11, and the other end is respectively connected to the resistor R22 and the MOS tube Q5.

[0011] Preferably, the voice MIC control module circuit is composed of a resistor R16, a resistor R17, a capacitor C21 and a MIC pickup M1, wherein one end of the resistor R16 is connected to the main control MCU11, and the other end is connected to the MIC pickup M1; one end of the resistor R17 is connected to the main control MCU11, and the other end is connected to the capacitor C21; the capacitor C21 is connected to the MIC pickup M1 at one end away from the resistor R17.

[0012] Preferably, the light-controlled level conversion module circuit is composed of a level conversion chip U7, a capacitor C28 and a capacitor C29, wherein one end of the capacitor C28 and the capacitor C29 is grounded, and the other end is respectively connected to pins 1 and 8 of the level conversion chip U7.

[0013] Preferably, the DC-DC conversion module circuit is composed of a DC-DC conversion chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R33, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C7, a capacitor C30, a capacitor C31, a fuse F2 and an inductor L1, wherein the capacitor C1 and the capacitor C2 are connected in parallel, and one end of the capacitor C1 and the capacitor C2 is grounded, and the other end is respectively connected to the 12V power supply end and the pin 1 of the DC-DC conversion chip U2; one end of the resistor R1 is connected to the main control MCU11, and the other end is respectively connected to the resistor R2 and the pin 2 of the DC-DC conversion chip U2; one end of the resistor R5 is connected to the main control MCU11, and the other end is connected to the resistor R2 and the pin 2 of the DC-DC conversion chip U2; One end is connected to pin 5 of the DC-DC conversion chip U2; resistor R33 is connected in series with capacitor C30 and then in parallel with capacitor C31, and the end of resistor R33 away from capacitor C30 is connected to pin 4 of the DC-DC conversion chip U2; the two ends of capacitor C3 are respectively connected to pins 6 and 9 of the DC-DC conversion chip U2, one end of fuse F2 is connected to the 4.6V power supply end, and the other end is connected to pin 9 of the DC-DC conversion chip U2 through inductor L1; capacitor C5 and capacitor C7 are connected in parallel, and one end of capacitor C5 and capacitor C7 is grounded, and the other end is respectively connected to fuse F2 and inductor L1; resistor R3 and capacitor C4 are connected in parallel and then in series with resistor R4, and the end of resistor R4 away from resistor R3 and capacitor C4 is grounded.

[0014] Preferably, the model of the DC-DC conversion chip U2 is AP63356, and the model of the fuse F2 is F1812.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model provides a car atmosphere lamp control circuit, which includes a main control MCU, an LDO module circuit, a LIN communication module circuit, a PWM drive module circuit, a voice MIC control module circuit, a light control level conversion module circuit, a DC-DC conversion module circuit, an input connection terminal and an output connection terminal. The overall structure is simple and the design is reasonable. The main control MCU is respectively connected with the LDO module circuit, the LIN communication module circuit, the PWM drive module circuit, the voice MIC control module circuit, the light control level conversion module circuit and the DC-DC conversion module circuit. The main control MCU has high integration, the communication efficiency is high through the LIN communication module circuit, and the voice communication control can be realized through the voice MIC control module circuit, and the functionality is complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the principle block diagram of the utility model;

[0018] Figure 2 This is a circuit schematic diagram of the main control MCU and its peripheral circuits of the utility model;

[0019] Figure 3 This is a circuit schematic diagram of the LDO module circuit of the utility model;

[0020] Figure 4 This is the circuit schematic diagram of the LIN communication module circuit of the utility model;

[0021] Figure 5 This is the circuit schematic diagram of the PWM drive module circuit of the utility model;

[0022] Figure 6 This is the electrical schematic diagram of the voice MIC control module circuit of the utility model;

[0023] Figure 7 This is a circuit schematic diagram of the light control level conversion module circuit of the utility model;

[0024] Figure 8 The schematic diagram of the DC-DC conversion module circuit of the utility model is shown in FIG.

[0025] The reference numerals and names in the figures are as follows:

[0026] 11. Main control MCU; 12. LDO module circuit; 13. LIN communication module circuit; 14. PWM drive module circuit; 15. Voice MIC control module circuit; 16. Light control level conversion module circuit; 17. DC-DC conversion module circuit; 18. Input connection terminal; 19. Output connection terminal. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1The utility model provides an embodiment: a car atmosphere lamp control circuit, which includes a main control MCU11, an LDO module circuit 12, a LIN communication module circuit 13, a PWM drive module circuit 14, a voice MIC control module circuit 15, a light control level conversion module circuit 16, a DC-DC conversion module circuit 17, an input connection terminal 18 and an output connection terminal 19. The main control MCU11 is respectively connected to the LDO module circuit 12, the LIN communication module circuit 13, the PWM drive module circuit 14, the voice MIC control module circuit 15, the light control level conversion module circuit 16 and the DC-DC conversion module circuit 17, the LDO module circuit 12 and the LIN communication module circuit 13 are respectively connected to the input connection terminal 18, and the PWM drive module circuit 14 and the light control level conversion module circuit 16 are respectively connected to the output connection terminal 19.

[0029] Please refer again Figure 1 The automobile atmosphere light control circuit in the utility model adopts the main control MCU 11 to control the operation of the LDO module circuit 12, the LIN communication module circuit 13, the PWM drive module circuit 14, the voice MIC control module circuit 15, the light control level conversion module circuit 16, the DC-DC conversion module circuit 17, the input connection terminal 18 and the output connection terminal 19. It has high integration, high communication efficiency through the LIN communication module circuit 13, and voice communication control can be realized through the voice MIC control module circuit 15, with full functionality.

[0030] See also Figure 2 In the figure, the model of the main control MCU 11 is AC6958B0 or ​​AC6958D0. In this embodiment, the model of the main control MCU 11 is preferably AC6958B0.

[0031] See also Figure 3, the LDO module circuit 12 in the figure is composed of a voltage stabilizing chip U5, a transistor U6, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a MOS tube Q1, a MOS tube Q3, a resistor R11, a resistor R14, a resistor R15, a resistor R19, a diode D2 and a diode D3, wherein the capacitor C23 and the capacitor C24 are connected in parallel, and one end of the capacitor C23 and the capacitor C24 is grounded, and the other end is connected to the No. 3 pin of the transistor U6; the No. 2 pin of the transistor U6 is connected to the No. 1 pin of the voltage stabilizing chip U5, the capacitor C21 and the capacitor C22 are connected in parallel, and one end of the capacitor C21 and the capacitor C22 is grounded, and the other end is connected to the No. 1 pin of the voltage stabilizing chip U5; the capacitor C19 and the capacitor C20 are connected in parallel, and one end of the capacitor C19 and the capacitor C20 is grounded, and the other end is respectively connected to the MOS tube Q1 and the voltage stabilizing chip U 5 is connected to pins 7 and 8 of the control circuit MCU11; both ends of the resistor R11 are connected to the MOS tube Q1, respectively; both ends of the resistor R14 are connected to the MOS tube Q1 and the MOS tube Q3, one end of the capacitor C25 is grounded, and the other end is connected to the resistor R11 and the MOS tube Q1; both ends of the resistor R19 are connected to the MOS tube Q3, the diode D2 and the diode D3 are connected in parallel, and one end of the diode D2 and the diode D3 is connected to the main control MCU11, and the other end is connected to the resistor R15, and the end of the resistor R15 away from the diode D2 and the diode D3 is connected to the MOS tube Q3 and the resistor R19 respectively. In this embodiment, the model of the voltage stabilizing chip U5 is: TMP1200, the model of the triode U6 is: 7333, the model of the MOS tube Q1 is: AO3401, the model of the MOS tube Q3 is: PMV45EN2, and the model of the diode D2 and the diode D3 is: 1N4148.

[0032] See also Figure 4The LIN communication module circuit 13 in the figure consists of a LIN communication chip U4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R30, a resistor R31, a resistor R32, a capacitor C16, a capacitor C17, a capacitor C18 and a diode D1, wherein one end of the resistor R6, the resistor R7 and the resistor R8 is connected to a 3.3V power supply, and the other end is respectively connected to the resistor R30, the resistor R32, the resistor R31 and the No. 1, No. 4 and No. 2 pins of the LIN communication chip U4; one end of the resistor R10 is grounded, and the other end is respectively connected to the resistor R8, the resistor R31 and the No. 2 pin of the LIN communication chip U4; the capacitor C16 and the capacitor C17 are connected in parallel. The two terminals are connected in series, and one end of capacitor C16 and capacitor C17 are grounded, and the other ends are respectively connected to the 12V power supply terminal and pin 7 of the LIN communication chip U4; one end of capacitor C18 is grounded, and the other end is respectively connected to resistor R9 and pin 6 of the LIN communication chip U4; the end of resistor R9 away from capacitor C18 is connected to the cathode of diode D1, the anode of diode D1 is connected to pin 7 of the LIN communication chip U4, pin 8 of the LIN communication chip U4 is connected to the main control MCU, and pin 6 of the LIN communication chip U4 is also connected to the input connection terminal 18. In this embodiment, the model of the LIN communication chip U4 is: CA-IF1021S-Q1.

[0033] See also Figure 5 The PWM drive module circuit 14 in the figure is composed of MOS tube Q2, MOS tube Q4, MOS tube Q5, resistor R12, resistor R13, resistor R18, resistor R20, resistor R21, resistor R22 and PWM communication interface J5, wherein pins 2, 3 and 4 of the PWM communication interface J5 are connected to MOS tube Q2, MOS tube Q4 and MOS tube Q5 respectively, both ends of resistor R13 are connected to MOS tube Q2, one end of resistor R12 is connected to the main control MCU11, and the other end is connected to the main control MCU11. The two ends of the resistor R20 are connected to the MOS tube Q4, one end of the resistor R18 is connected to the main control MCU11, and the other end is connected to the resistor R20 and the MOS tube Q4 respectively; the two ends of the resistor R22 are connected to the MOS tube Q5, one end of the resistor R21 is connected to the main control MCU11, and the other end is connected to the resistor R22 and the MOS tube Q5 respectively. In this embodiment, the models of the MOS tubes Q2, Q4 and Q5 are all AO3400.

[0034] See also Figure 6The voice MIC control module circuit 15 in the figure is composed of a resistor R16, a resistor R17, a capacitor C21 and a MIC pickup M1, wherein one end of the resistor R16 is connected to the main control MCU11, and the other end is connected to the MIC pickup M1; one end of the resistor R17 is connected to the main control MCU11, and the other end is connected to the capacitor C21; the capacitor C21 is connected to the MIC pickup M1 at one end away from the resistor R17.

[0035] See also Figure 7 In the figure, the light control level conversion module circuit 16 is composed of a level conversion chip U7, a capacitor C28 and a capacitor C29, wherein one end of the capacitor C28 and the capacitor C29 is grounded, and the other end is respectively connected to the No. 1 and No. 8 pins of the level conversion chip U7. In this embodiment, the model of the level conversion chip U7 is: SN74LVC2T45DCTR.

[0036] See also Figure 8 The DC-DC conversion module circuit 17 in the figure is composed of a step-down DC-DC conversion chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R33, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C7, a capacitor C30, a capacitor C31, a fuse F2 and an inductor L1, wherein the capacitor C1 and the capacitor C2 are connected in parallel, and one end of the capacitor C1 and the capacitor C2 is grounded, and the other end is respectively connected to the 12V power supply end and the pin 1 of the DC-DC conversion chip U2; one end of the resistor R1 is connected to the main control MCU11, and the other end is respectively connected to the resistor R2 and the pin 2 of the DC-DC conversion chip U2; one end of the resistor R5 is connected to the main control MCU11, and the other end is connected to the pin 5 of the DC-DC conversion chip U2. The resistor R33 is connected in series with the capacitor C30 and then in parallel with the capacitor C31, and the end of the resistor R33 away from the capacitor C30 is connected to the No. 4 pin of the DC-DC conversion chip U2; the two ends of the capacitor C3 are respectively connected to the No. 6 and No. 9 pins of the DC-DC conversion chip U2, one end of the fuse F2 is connected to the 4.6V power supply end, and the other end is connected to the No. 9 pin of the DC-DC conversion chip U2 after passing through the inductor L1; the capacitor C5 and the capacitor C7 are connected in parallel, and one end of the capacitor C5 and the capacitor C7 is grounded, and the other end is respectively connected to the fuse F2 and the inductor L1; the resistor R3 and the capacitor C4 are connected in parallel and then in series with the resistor R4, and the resistor R4 is grounded at one end away from the resistor R3 and the capacitor C4. The model of the DC-DC conversion chip U2 is AP63356, and the model of the fuse F2 is F1812.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A car atmosphere light control circuit, characterized in that: The invention comprises a main control MCU (11), an LDO module circuit (12), a LIN communication module circuit (13), a PWM drive module circuit (14), a voice MIC control module circuit (15), a light control level conversion module circuit (16), a DC-DC conversion module circuit (17), an input connection end (18) and an output connection end (19); the main control MCU (11) is respectively connected to the LDO module circuit (12), the LIN communication module circuit (13), the PWM drive module circuit (14), the voice MIC control module circuit (15), the light control level conversion module circuit (16) and the DC-DC conversion module circuit (17); the LDO module circuit (12) and the LIN communication module circuit (13) are respectively connected to the input connection end (18); and the PWM drive module circuit (14) and the light control level conversion module circuit (16) are respectively connected to the output connection end (19).

2. The automotive atmosphere light control circuit according to claim 1, characterized in that: The model of the main control MCU (11) is AC6958B0 or ​​AC6958D0.

3. The automotive atmosphere light control circuit according to claim 1, characterized in that: The LDO module circuit (12) is composed of a voltage stabilizing chip U5, a transistor U6, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a MOS transistor Q1, a MOS transistor Q3, a resistor R11, a resistor R14, a resistor R15, a resistor R19, a diode D2 and a diode D3, wherein the capacitor C23 and the capacitor C24 are connected in parallel, and one end of the capacitor C23 and the capacitor C24 is grounded, and the other end is connected to the No. 3 pin of the transistor U6; the No. 2 pin of the transistor U6 is connected to the No. 1 pin of the voltage stabilizing chip U5; the capacitor C21 and the capacitor C22 are connected in parallel, and one end of the capacitor C21 and the capacitor C22 is grounded, and the other end is connected to the No. 1 pin of the voltage stabilizing chip U5; the capacitor C19 and capacitor C20 are connected in parallel, and one end of capacitor C19 and capacitor C20 is grounded, and the other end is connected to MOS tube Q1 and No. 7 and No. 8 pins of voltage regulator chip U5 respectively; the two ends of resistor R11 are connected to MOS tube Q1 respectively, the two ends of resistor R14 are connected to MOS tube Q1 and MOS tube Q3 respectively, one end of capacitor C25 is grounded, and the other end is connected to resistor R11 and MOS tube Q1 respectively; both ends of resistor R19 are connected to MOS tube Q3, diode D2 and diode D3 are connected in parallel, and one end of diode D2 and diode D3 is connected to main control MCU11, and the other end is connected to resistor R15, and the end of resistor R15 away from diode D2 and diode D3 is connected to MOS tube Q3 and resistor R19 respectively.

4. The automotive atmosphere light control circuit according to claim 1, characterized in that: The LIN communication module circuit (13) comprises a LIN communication chip U4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R30, a resistor R31, a resistor R32, a capacitor C16, a capacitor C17, a capacitor C18 and a diode D1, wherein one end of the resistor R6, the resistor R7 and the resistor R8 are connected to a 3.3V power supply, and the other ends are respectively connected to the resistor R30, the resistor R32, the resistor R31 and the No. 1, No. 4 and No. 2 pins of the LIN communication chip U4; one end of the resistor R10 is grounded, and the other end is respectively connected to the resistor R8, the resistor R31 and the No. 2 pins of the LIN communication chip U4 No. 1 pin is connected; capacitor C16 and capacitor C17 are connected in parallel, and one end of capacitor C16 and capacitor C17 are grounded, and the other ends are respectively connected to the 12V power supply end and pin 7 of the LIN communication chip U4; one end of capacitor C18 is grounded, and the other end is respectively connected to resistor R9 and pin 6 of the LIN communication chip U4; the end of resistor R9 away from capacitor C18 is connected to the cathode of diode D1, the anode of diode D1 is connected to pin 7 of the LIN communication chip U4, pin 8 of the LIN communication chip U4 is connected to the main control MCU, and pin 6 of the LIN communication chip U4 is also connected to the input connection terminal 18.

5. The automotive atmosphere light control circuit according to claim 4, characterized in that: The model of the LIN communication chip U4 is: CA-IF1021S-Q1.

6. The automotive atmosphere light control circuit according to claim 1, characterized in that: The PWM drive module circuit (14) comprises a MOS transistor Q2, a MOS transistor Q4, a MOS transistor Q5, a resistor R12, a resistor R13, a resistor R18, a resistor R20, a resistor R21, a resistor R22 and a PWM communication interface J5, wherein pins 2, 3 and 4 of the PWM communication interface J5 are respectively connected to the MOS transistor Q2, the MOS transistor Q4 and the MOS transistor Q5, both ends of the resistor R13 are connected to the MOS transistor Q2, one end of the resistor R12 is connected to the main control MCU11, and the other end is respectively connected to the resistor R13 and the MOS transistor Q2; both ends of the resistor R20 are connected to the MOS transistor Q4, one end of the resistor R18 is connected to the main control MCU11, and the other end is respectively connected to the resistor R20 and the MOS transistor Q4; both ends of the resistor R22 are connected to the MOS transistor Q5, one end of the resistor R21 is connected to the main control MCU11, and the other end is respectively connected to the resistor R22 and the MOS transistor Q5.

7. The automotive atmosphere light control circuit according to claim 1, characterized in that: The voice MIC control module circuit (15) is composed of a resistor R16, a resistor R17, a capacitor C21 and a MIC pickup M1, wherein one end of the resistor R16 is connected to the main control MCU11, and the other end is connected to the MIC pickup M1; one end of the resistor R17 is connected to the main control MCU11, and the other end is connected to the capacitor C21; and the end of the capacitor C21 away from the resistor R17 is connected to the MIC pickup M1.

8. The automotive atmosphere light control circuit according to claim 1, characterized in that: The light-controlled level conversion module circuit (16) is composed of a level conversion chip U7, a capacitor C28 and a capacitor C29, wherein one end of the capacitor C28 and the capacitor C29 is grounded, and the other end is respectively connected to the No. 1 and No. 8 pins of the level conversion chip U7.

9. The automotive atmosphere light control circuit according to claim 1, characterized in that: The DC-DC conversion module circuit (17) is composed of a step-down DC-DC conversion chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R33, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C7, a capacitor C30, a capacitor C31, a fuse F2 and an inductor L1, wherein the capacitor C1 and the capacitor C2 are connected in parallel, and one end of the capacitor C1 and the capacitor C2 is grounded, and the other end is respectively connected to the 12V power supply end and the pin No. 1 of the DC-DC conversion chip U2; one end of the resistor R1 is connected to the main control MCU11, and the other end is respectively connected to the resistor R2 and the pin No. 2 of the DC-DC conversion chip U2; one end of the resistor R5 is connected to the main control MCU11, and the other end is connected to the resistor R2 and the pin No. 2 of the DC-DC conversion chip U2; one end of the resistor R5 is connected to the main control MCU11, and the other end is connected to the resistor R5. One end is connected to pin 5 of the DC-DC conversion chip U2; resistor R33 is connected in series with capacitor C30 and then in parallel with capacitor C31, and the end of resistor R33 away from capacitor C30 is connected to pin 4 of the DC-DC conversion chip U2; the two ends of capacitor C3 are respectively connected to pins 6 and 9 of the DC-DC conversion chip U2, one end of fuse F2 is connected to the 4.6V power supply end, and the other end is connected to pin 9 of the DC-DC conversion chip U2 through inductor L1; capacitor C5 and capacitor C7 are connected in parallel, and one end of capacitor C5 and capacitor C7 is grounded, and the other end is respectively connected to fuse F2 and inductor L1; resistor R3 and capacitor C4 are connected in parallel and then in series with resistor R4, and the end of resistor R4 away from resistor R3 and capacitor C4 is grounded.

10. The automotive atmosphere light control circuit according to claim 9, characterized in that: The model of the DC-DC conversion chip U2 is AP63356, and the model of the fuse F2 is F1812.

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