CN213948270U

CN213948270U - Automobile tail lamp control device

Info

Publication number: CN213948270U
Application number: CN202022793027.4U
Authority: CN
Inventors: 李唯为
Original assignee: Keboda Technology Co ltd; Zhejiang Keboda Industrial Co ltd
Current assignee: Keboda Technology Co ltd; Zhejiang Keboda Industrial Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-08-13
Anticipated expiration: 2030-11-26

Abstract

The automobile tail lamp control device comprises an MCU, a power circuit, a CAN transceiver, a switching value input interface circuit and a power driving circuit. And the first output end and the second output end of the power supply circuit are respectively connected with the power supply input end of the MCU and the power supply input end of the power driving circuit so as to supply power to the MCU and the power driving circuit. The MCU is provided with a CAN communication module, and the CAN communication module is connected with the CAN transceiver; and the MCU is respectively connected with the switching value input interface circuit and the power driving circuit so as to receive the switching value signal output by the switching value input interface circuit and the driving current feedback signal output by the power driving circuit and control the work of the power driving circuit. The output end of the power driving circuit is used for being connected with an automobile tail lamp. The utility model discloses an integrated level is high, and is with low costs, and the reliability is high.

Description

Automobile tail lamp control device

Technical Field

The utility model relates to an automotive lighting technique.

Background

At present, automobile tail lamp control devices adopting a CAN communication mode have gradually become the mainstream in the industry. However, the existing automobile tail light control device has the defects of complex circuit, high cost and poor reliability, and still has room for further improvement.

Disclosure of Invention

The utility model aims to solve the technical problem that an automobile tail lamp controlling means that the integrated level is high, with low costs, the reliability is high is provided.

The utility model discloses automobile tail lamp controlling means of embodiment, including MCU, power supply circuit, CAN transceiver, switching value input interface circuit and power drive circuit; the first output end and the second output end of the power supply circuit are respectively connected with the power supply input end of the MCU and the power supply input end of the power driving circuit so as to supply power to the MCU and the power driving circuit; the MCU is provided with a CAN communication module, and the CAN communication module is connected with the CAN transceiver; the MCU is respectively connected with the switching value input interface circuit and the power driving circuit so as to receive a switching value signal output by the switching value input interface circuit and a driving current feedback signal output by the power driving circuit and control the work of the power driving circuit; the output end of the power driving circuit is used for being connected with an automobile tail lamp.

In the above-mentioned tail light control device for an automobile, the power driving circuit includes one or more driving chips with a model number of VND5T035 AK.

In the above automobile tail lamp control device, the driving current feedback pin of each driving chip is connected to the ADC interface of the MCU, and the driving enable pin of each driving chip is connected to the GPIO interface of the MCU.

After the technical scheme is adopted, the utility model discloses following advantage and characteristics have at least:

1. the automobile tail lamp control device of the embodiment integrates the CAN communication module in the MCU, CAN be directly externally connected with the CAN transceiver, CAN be connected with the power driving circuit and the switching value input interface circuit through the GPIO interface, and CAN realize integration and miniaturization of all parts of the automobile tail lamp control device, so that the circuit structure CAN be simplified, and the manufacturing cost CAN be saved;

2. the automobile tail lamp control device separates partial functions in the automobile body central controller, and an electric system framework matched with the automobile tail lamp control device is lower in cost than that of the automobile body central controller, so that the load rate of a CAN bus is reduced, and information transmission is more reliable and stable.

Drawings

Fig. 1 shows a schematic diagram of an automotive tail light control device according to an embodiment of the present invention.

Fig. 2 shows a schematic circuit diagram of a power supply circuit according to an embodiment of the present invention.

Fig. 3 shows a schematic circuit diagram of a CAN transceiver according to an embodiment of the present invention.

Fig. 4 shows a schematic circuit diagram of a power driving circuit according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a schematic diagram of a rear light control device of an automobile according to an embodiment of the present invention, please refer to fig. 1. According to the utility model discloses an automobile tail lamp controlling means, including MCU1, power supply circuit 2, CAN transceiver 3, switching value input interface circuit 4 and power drive circuit 5.

The first output end and the second output end of the power supply circuit 2 are respectively connected with the power supply input end of the MCU1 and the power supply input end of the power driving circuit 5 to supply power to the MCU1 and the power driving circuit 5.

Please refer to fig. 2. In the present embodiment, the power supply circuit 2 supplies power from the battery pack of the automobile at a nominal voltage of + 24V. When the automobile runs, the working voltage of the storage battery is unstable, so that the tail lamp control device works abnormally. Therefore, the power circuit 2 of the embodiment adopts a linear power chip with a wide voltage input range and high output precision, the model of which is TPS7B6950, the output voltage of the linear power chip during normal operation is 5V, the precision of ± 2%, the maximum operating current is 150 mA, and the linear power chip has short circuit, overcurrent, temperature overload protection, and other functions. By using the chip and the peripheral auxiliary circuit (mainly a filter circuit), the power supply of the power supply circuit is stable and reliable.

Further, the power supply circuit 2 includes a voltage regulator D1, a diode D0, a capacitor C1, a capacitor C3, a capacitor C4, and a capacitor C5. The cathode of the voltage regulator tube D1 is respectively connected with a 24V power supply and the anode of the diode D0, and the cathode of the diode D0, one end of the capacitor C1 and one end of the capacitor C3 are all connected with a power supply input pin of the linear power supply chip; a power supply output pin of the linear power supply chip is respectively connected with one end of a capacitor C4 and one end of a capacitor C5; the anode of the voltage regulator tube D1, the other end of the capacitor C1, the other end of the capacitor C3, the other end of the capacitor C4, the other end of the capacitor C5 and the grounding pin of the linear power supply chip are all grounded.

The MCU1 has CAN communication module 11, and CAN communication module 11 is connected with CAN transceiver 3, and CAN transceiver 3 is connected with automobile body CAN bus to the control command of automobile body central controller CAN be received through the CAN bus. The MCU1 is connected to the switching value input interface circuit 4 and the power driving circuit 5, respectively, to receive the switching value signal output by the switching value input interface circuit 4 and the driving current feedback signal output by the power driving circuit 5, and control the operation of the power driving circuit 5. The MCU1 is the core of the tail lamp controller, and is responsible for data acquisition and processing, logic operation, control, etc.

In the present embodiment, the MCU1 is a single chip of model MC9S08DZ60 manufactured by enzimap (NXP) semiconductor corporation. The MCU1 has interfaces such as ADC (analog to digital converter) (A/D acquisition), GPIO (general purpose input/output control), CAN, SCI, BDM, etc. A CAN communication module compatible with a CAN 2.0A/B protocol is integrated in the MC9S08DZ60 chip, so that the MCU1 only needs to be externally connected with a CAN transceiver.

Please refer to fig. 3. In the present embodiment, the CAN transceiver 3 uses a transceiver chip manufactured by PHILIPs (PHILIP) and having a model number TJA 1050. The baud rate of the chip ranges from 60 kb/s to 1 Mb/s, and the chip is provided with a temperature protection circuit to play a role in protection when a bus is short-circuited. The tail lamp control device adopts the CAN bus to replace the traditional control wire harness, CAN reduce the using quantity and the volume of the wire harness, reduce the quality of the whole vehicle, reduce the production cost, have higher data transmission reliability and installation convenience, and expand the functions of the vehicle.

The output end of the power driving circuit 5 is used for connecting the automobile tail lamp.

Please refer to fig. 4. In this embodiment, the power driving circuit 5 employs one or more driving chips with a model number of VND5T035AK, and the driving chip has functions of power driving control, driving current feedback, fault diagnosis, intelligent turn-off, and the like, can detect open-circuit, overload, and short-circuit faults, and has functions of protecting components from overheating, overcurrent, and short-circuit. In one specific embodiment, the power driving circuit 5 employs 4 driver chips with VND5T035AK, and has a total of 8 outputs. The load type of the driven automobile tail light may be a light bulb or an LED.

In this embodiment. The driving current feedback pin of each driving chip is connected with the ADC interface of the MCU1, and the driving enabling pin of each driving chip is connected with the GPIO interface of the MCU 1. The output end of the switching value input interface circuit 4 is connected with the GPIO interface of the MCU 1.

The automobile tail lamp control device of the embodiment has the advantages that the CAN communication module is integrated in the MCU, the CAN transceiver CAN be directly connected with the external CAN, the MCU CAN be connected with the power driving circuit and the switching value input interface circuit through the GPIO interface, and all parts of the automobile tail lamp control device CAN be integrated and miniaturized, so that the circuit structure CAN be simplified, and the manufacturing cost CAN be saved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A tail lamp control device of an automobile is characterized by comprising an MCU, a power circuit, a CAN transceiver, a switching value input interface circuit and a power driving circuit;

a first output end and a second output end of the power supply circuit are respectively connected with a power supply input end of the MCU and a power supply input end of the power driving circuit so as to supply power to the MCU and the power driving circuit;

the MCU is provided with a CAN communication module, and the CAN communication module is connected with the CAN transceiver; the MCU is respectively connected with the switching value input interface circuit and the power driving circuit so as to receive a switching value signal output by the switching value input interface circuit and a driving current feedback signal output by the power driving circuit and control the work of the power driving circuit;

and the output end of the power driving circuit is used for connecting an automobile tail lamp.

2. The automobile tail light control device according to claim 1, characterized in that the model of the MCU is MC9S08DZ 60.

3. The automobile tail light control device according to claim 1 or 2, characterized in that the power driving circuit includes one or more driver chips of type VND5T035 AK.

4. The device as claimed in claim 3, wherein the driving current feedback pin of each driving chip is connected to the ADC interface of the MCU, and the driving enable pin of each driving chip is connected to the GPIO interface of the MCU.

5. The automotive tail light control device of claim 1, wherein the CAN transceiver includes a transceiver chip of type TJA 1050.

6. The automobile tail light control device as claimed in claim 1, wherein the power circuit includes a linear power chip of model number TPS7B6950, a voltage regulator tube D1, a diode D0, a capacitor C1, a capacitor C3, a capacitor C4 and a capacitor C5;

the cathode of the voltage regulator tube D1 is respectively connected with a 24V power supply and the anode of the diode D0, and the cathode of the diode D0, one end of the capacitor C1 and one end of the capacitor C3 are all connected with a power supply input pin of the linear power supply chip; a power supply output pin of the linear power supply chip is respectively connected with one end of a capacitor C4 and one end of a capacitor C5;

the anode of the voltage regulator tube D1, the other end of the capacitor C1, the other end of the capacitor C3, the other end of the capacitor C4, the other end of the capacitor C5 and the grounding pin of the linear power supply chip are all grounded.