Switching circuit for switching driving control function of automobile lamp

Abstract

The utility model relates to the technical field of automobile lamp control, and discloses an automobile lamp driving control function switching switch circuit comprising a power supply management module, a communication signal module, a driving control module and three load loop modules, the power supply management module and the communication signal module are electrically connected with the driving control module, and the three load loop modules are electrically connected with the driving control module. The driving control module comprises a driving chip, a single-chip microcomputer, a first circuit, a second circuit and a third circuit, the input of the driving chip is connected with the output of the single-chip microcomputer, and the driving control module supplies power to the three load loop modules and switches the three load loop modules through the driving chip and the single-chip microcomputer respectively. According to the utility model, the switch loop based on output switching is adopted, and the switch loop is added on the rear-end output circuit under the condition that the front-end driving module is not changed or increased, so that the function of switching different lamps is achieved, the number of front-end control modules is effectively reduced, and the cost is reduced. And the space utilization rate is improved while the automobile production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive lamp control, in particular to a switching circuit for switching the driving control functions of automotive lamps. Background Technique

[0002] With the rapid development of automotive industry technology, the market has an increasing demand for diversified automotive functions. In order to drive different functions of automotive lamps, the prior art usually adopts the method of adding driving modules. The body inputs a power signal, which, after passing through the power management module, uses different driving modules to control different lamp functions respectively. This will lead to a higher production cost of the vehicle and an increase in the space required for the driver inside the lamp. Content of the Utility Model

[0003] The purpose of the utility model is to provide a switching circuit for switching the driving control functions of automotive lamps, so as to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A switching circuit for switching the driving control functions of automotive lamps, including a power management module, a communication signal module, a driving control module, and three load circuit modules. The power management module and the communication signal module are both electrically connected to the driving control module. The driving control module includes a driving chip, a single-chip microcomputer, a first circuit, a second circuit, and a third circuit. The input of the driving chip is connected to the output of the single-chip microcomputer. The driving control module supplies power and switches the switches for the three load circuit modules respectively through the driving chip and the single-chip microcomputer. The first circuit, the second circuit, and the third circuit are all connected to the interfaces on the single-chip microcomputer. The first circuit includes a resistor R4, an NMOS transistor Q2, a resistor R2, and a PMOS transistor Q1. The first end of the resistor R4 is connected to the single-chip microcomputer interface 1, and the second end of the resistor R4 is connected to the pin 1 of the NMOS transistor Q2. A resistor R5 and a capacitor C2 are respectively connected in series between the pin 2 of the NMOS transistor Q2 and the second end of the resistor R4. The pin 3 of the NMOS transistor Q2 is connected to the first end of the resistor R2. The second end of the resistor R2 is connected to the pin 1 of the PMOS transistor Q1. The pin 2 and the pin 3 of the PMOS transistor Q1 are respectively connected to the input and output of the first load circuit module.

[0005] In the present application solution, the following improvements are made. A resistor R1 and a diode D1 are respectively connected in series between the pin 2 of the PMOS transistor Q1 and the second end of the resistor R2. A capacitor C1 and a resistor R3 are connected in series between the pin 3 of the PMOS transistor Q1 and the second end of the resistor R2. One end of the resistor R5 is grounded.

[0006] The following improvements are made in the solution of this application. The structure of the second circuit is the same as that of the first circuit. The second circuit includes a resistor R9, an NMOS transistor Q4, a resistor R7, and a PMOS transistor Q3. The first end of the resistor R9 is connected to the microcontroller interface 2, and the second end of the resistor R9 is connected to the pin 1 of the NMOS transistor Q4. A resistor R10 and a capacitor C4 are respectively connected in series between the pin 2 of the NMOS transistor Q4 and the second end of the resistor R9. The pin 3 of the NMOS transistor Q4 is connected to the first end of the resistor R7. The second end of the resistor R7 is connected to the pin 1 of the PMOS transistor Q3. The pin 2 and pin 3 of the PMOS transistor Q3 are respectively connected to the input and output of the second load circuit module. A resistor R6 and a diode D2 are respectively connected in series between the pin 2 of the PMOS transistor Q3 and the second end of the resistor R7. A capacitor C3 and a resistor R8 are connected in series between the pin 3 of the PMOS transistor Q3 and the second end of the resistor R7. One end of the resistor R10 is grounded.

[0007] The following improvements are made in the solution of this application. The third circuit includes a resistor R12 and an NMOS transistor Q5. The first end of the resistor R12 is connected to the interface 3 of the microcontroller, and the second end of the resistor R12 is connected to the pin 1 of the NMOS transistor Q5. The pin 2 and pin 3 of the NMOS transistor Q5 are respectively connected to the input and output of the third load circuit module. A resistor R11 and a capacitor C5 are connected in series between the pin 3 of the NMOS transistor Q5 and the second end of the resistor R12. A capacitor C7 and a resistor R13 are respectively connected in series between the pin 2 of the NMOS transistor Q5 and the second end of the resistor R12D. A capacitor C6 is connected in series between the pin 2 and pin 3 of the NMOS transistor Q5. The pin 2 of the NMOS transistor Q5 is grounded.

[0008] The following improvements are made in the solution of this application. The load circuit module includes corresponding functions and at least two LED lights. The voltage value of the corresponding function is greater than the voltage value of the microcontroller interface. The three load circuit modules are connected in series.

[0009] The following improvements are made in the solution of this application. The model of the microcontroller is S32K312.

[0010] Compared with the prior art, the present utility model provides a switching circuit for switching the driving control function of an automotive lamp, having the following beneficial effects:

[0011] The present utility model adopts a switching circuit based on output switching. Without changing or adding the front-end drive module, a switching circuit is added to the back-end output circuit to achieve switching of different lamp functions, that is, one drive module can drive multiple lamp functions, effectively reducing the number of front-end control modules, solving the problems of the increase in the production cost of the vehicle caused by the increase in the number of traditional front-end control modules and the increase in the space required for the driver inside the lamp, reducing the production cost of the vehicle while improving the space utilization rate. Description of the Drawings

[0012] Figure 1 It is a structural block diagram of the present utility model;

[0013] Figure 2 It is a circuit diagram of the drive control module. Detailed Embodiment

[0014] Next, the technical solutions in the embodiments of the present utility model will be described in conjunction with the accompanying drawings in the embodiments of the present utility model:

[0015] As Figure 1-2 shown, a switch circuit for switching the drive control function of an automotive lamp includes a power management module, a communication signal module, a drive control module, and three load circuit modules. The power management module and the communication signal module are both electrically connected to the drive control module. The power management module is powered by the vehicle body, and the communication signal module communicates with the vehicle body and then transmits power supply signals to the drive control module respectively. The load circuit module includes corresponding functions and at least two LED lights. The corresponding functions in the three load circuit modules are Function 1, Function 2, and Function 3 respectively. Function 1, Function 2, and Function 3 are connected in series.

[0016] The drive control module includes a drive chip, a single-chip microcomputer, a first circuit, a second circuit, and a third circuit. The model of the single-chip microcomputer is S32K312, and the drive chip can use any model of drive chip currently on the market. The input of the drive chip is connected to the output of the single-chip microcomputer. The drive chip supplies power to the corresponding functions of each load circuit module, and then the switch is switched through the interface of the single-chip microcomputer.

[0017] The first circuit includes resistor R4, NMOS transistor Q2, resistor R2, and PMOS transistor Q1. The first end of resistor R4 is connected to the single-chip microcomputer interface 1, the second end of resistor R4 is connected to pin 1 of NMOS transistor Q2. Between pin 2 of NMOS transistor Q2 and the second end of resistor R4, resistor R5 and capacitor C2 are connected in series respectively. Pin 3 of NMOS transistor Q2 is connected to the first end of resistor R2, the second end of resistor R2 is connected to pin 1 of PMOS transistor Q1. Pin 2 and pin 3 of PMOS transistor Q1 are respectively connected to the input and output of the first load circuit module. Between pin 2 of PMOS transistor Q1 and the second end of resistor R2, resistor R1 and diode D1 are connected in series respectively. Between pin 3 of PMOS transistor Q1 and the second end of resistor R2, capacitor C1 and resistor R3 are connected in series. One end of resistor R5 is grounded; The second circuit has the same structure as the first circuit. The second circuit includes resistor R9, NMOS transistor Q4, resistor R7, and PMOS transistor Q3. The first end of resistor R9 is connected to the single-chip microcomputer interface 2, the second end of resistor R9 is connected to pin 1 of NMOS transistor Q4. Between pin 2 of NMOS transistor Q4 and the second end of resistor R9, resistor R10 and capacitor C4 are connected in series respectively. Pin 3 of NMOS transistor Q4 is connected to the first end of resistor R7, the second end of resistor R7 is connected to pin 1 of PMOS transistor Q3. Pin 2 and pin 3 of PMOS transistor Q3 are respectively connected to the input and output of the second load circuit module. Between pin 2 of PMOS transistor Q3 and the second end of resistor R7, resistor R6 and diode D2 are connected in series respectively. Between pin 3 of PMOS transistor Q3 and the second end of resistor R7, capacitor C3 and resistor R8 are connected in series. One end of resistor R10 is grounded.

[0018] The third circuit includes resistor R12 and NMOS transistor Q5. The first end of resistor R12 is connected to the interface 3 of the single-chip microcomputer, the second end of resistor R12 is connected to pin 1 of NMOS transistor Q5. Pin 2 and pin 3 of NMOS transistor Q5 are respectively connected to the input and output of the third load circuit module. Between pin 3 of NMOS transistor Q5 and the second end of resistor R12, resistor R11 and capacitor C5 are connected in series. Between pin 2 of NMOS transistor Q5 and the second end of resistor R12D, capacitor C7 and resistor R13 are connected in series respectively. Between pin 2 and pin 3 of NMOS transistor Q5, capacitor C6 is connected in series. Pin 2 of NMOS transistor Q5 is grounded; Using the above circuit for the interface 3 of the single-chip microcomputer can achieve the purpose of reducing components and saving costs.

[0019] The voltage values of Function 1, Function 2, and Function 3 are all greater than the voltage values at the corresponding single-chip microcomputer interfaces 1, 2, and 3, enabling each MOS transistor Q1, Q3, and Q5 to be normally turned on or off. When any one of Function 1, Function 2, and Function 3 needs to be lit, the single-chip microcomputer outputs an enable signal to the drive chip, causing the drive chip to open the output channel and start powering Function 1, Function 2, and Function 3.

[0020] Working principle: When the interfaces 1 and 2 of the single-chip microcomputer output high level, the NMOS transistors Q2 and Q4 are turned on, causing the pin 1 of the PMOS transistors Q1 and Q3 to be grounded, and the PMOS transistors Q1 and Q3 are turned on. At this time, function 1 and function 2 are turned off;

[0021] When the interfaces 1 and 2 of the single-chip microcomputer output low level, the NMOS transistors Q2 and Q4 are not turned on, causing the pin 1 of the PMOS transistors Q1 and Q3 to be floating, and the PMOS transistors Q1 and Q3 are not turned on. At this time, function 1 and function 2 are turned on;

[0022] When the interface 3 of the single-chip microcomputer outputs high level, the NMOS transistor Q5 is turned on. At this time, function 3 is turned off;

[0023] When the interface 3 of the single-chip microcomputer outputs low level, the NMOS transistor Q5 is not turned on. At this time, function 3 is turned on.

[0024] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A switch circuit for switching the driving control function of an automobile lamp, characterized in that: The invention comprises a power management module, a communication signal module, a drive control module and three load circuit modules, wherein the power management module and the communication signal module are electrically connected to the drive control module, the drive control module comprises a drive chip, a single chip microcomputer, a first circuit, a second circuit and a third circuit, the input of the drive chip is connected to the output of the single chip microcomputer, the drive control module respectively supplies power and switches the three load circuit modules through the drive chip and the single chip microcomputer, the first circuit, the second circuit and the third circuit are all connected to the interface on the single chip microcomputer, the first circuit comprises a drive chip, a single chip microcomputer, a first circuit, a second circuit and a third circuit, the input of the drive chip is connected to the output of the single chip microcomputer, the drive control module respectively supplies power and switches the three load circuit modules through the drive chip and the single chip microcomputer, the first circuit comprises a drive chip, a single chip microcomputer, a ... The invention comprises a resistor R4, an NMOS tube Q2, a resistor R2 and a PMOS tube Q1, wherein a first end of the resistor R4 is connected to a single-chip computer interface 1, a second end of the resistor R4 is connected to a pin 1 of the NMOS tube Q2, a resistor R5 and a capacitor C2 are respectively connected in series between a pin 2 of the NMOS tube Q2 and the second end of the resistor R4, a pin 3 of the NMOS tube Q2 is connected to a first end of the resistor R2, a second end of the resistor R2 is connected to a pin 1 of the PMOS tube Q1, and pins 2 and 3 of the PMOS tube Q1 are respectively connected to an input and an output of a first load loop module.

2. The switch circuit for switching the driving control function of an automobile lamp according to claim 1, characterized in that: A resistor R1 and a diode D1 are connected in series between the pin 2 of the PMOS tube Q1 and the second end of the resistor R2, respectively; a capacitor C1 and a resistor R3 are connected in series between the pin 3 of the PMOS tube Q1 and the second end of the resistor R2; and one end of the resistor R5 is grounded.

3. The switch circuit for switching the driving control function of an automobile lamp according to claim 2, characterized in that: The structure of the second circuit is the same as that of the first circuit. The second circuit includes a resistor R9, an NMOS tube Q4, a resistor R7 and a PMOS tube Q3. The first end of the resistor R9 is connected to the single-chip computer interface 2, the second end of the resistor R9 is connected to the pin 1 of the NMOS tube Q4, a resistor R10 and a capacitor C4 are respectively connected in series between the pin 2 of the NMOS tube Q4 and the second end of the resistor R9, the pin 3 of the NMOS tube Q4 is connected to the first end of the resistor R7, the second end of the resistor R7 is connected to the pin 1 of the PMOS tube Q3, the pins 2 and 3 of the PMOS tube Q3 are respectively connected to the input and output of the second load loop module, a resistor R6 and a diode D2 are respectively connected in series between the pin 2 of the PMOS tube Q3 and the second end of the resistor R7, a capacitor C3 and a resistor R8 are connected in series between the pin 3 of the PMOS tube Q3 and the second end of the resistor R7, and one end of the resistor R10 is grounded.

4. The switch circuit for switching the driving control function of an automobile lamp according to claim 1, characterized in that: The third circuit includes a resistor R12 and an NMOS tube Q5, wherein a first end of the resistor R12 is connected to an interface 3 of the single-chip computer, a second end of the resistor R12 is connected to a pin 1 of the NMOS tube Q5, pins 2 and 3 of the NMOS tube Q5 are respectively connected to an input and an output of a third load loop module, a resistor R11 and a capacitor C5 are connected in series between the pin 3 of the NMOS tube Q5 and the second end of the resistor R12, a capacitor C7 and a resistor R13 are respectively connected in series between the pin 2 of the NMOS tube Q5 and the second end of the resistor R12D, a capacitor C6 is connected in series between the pin 2 and the pin 3 of the NMOS tube Q5, and the pin 2 of the NMOS tube Q5 is grounded.

5. The switch circuit for switching the driving control function of an automobile lamp according to claim 1, characterized in that: The load circuit module includes a corresponding function and at least two LED lights, the voltage value of the corresponding function is greater than the voltage value of the single-chip computer interface, and the three load circuit modules are arranged in series.

6. The switch circuit for switching the driving control function of an automobile lamp according to claim 1, characterized in that: The microcontroller model is S32K312.

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