CN215935138U - Control circuit of automobile traffic light based on single chip microcomputer - Google Patents
Control circuit of automobile traffic light based on single chip microcomputer Download PDFInfo
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- CN215935138U CN215935138U CN202122479655.XU CN202122479655U CN215935138U CN 215935138 U CN215935138 U CN 215935138U CN 202122479655 U CN202122479655 U CN 202122479655U CN 215935138 U CN215935138 U CN 215935138U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model relates to a control circuit of an automobile traffic light based on a single chip microcomputer, which comprises an MCU (microprogrammed control unit) main control module, a power supply module, an interface module and a light band driving module, wherein the MCU main control module is connected with a Bluetooth module for receiving a control signal sent from a mobile terminal through a serial peripheral interface, the MCU main control module is in interactive communication with an automobile master controller through a CAN (controller area network) bus module, the power supply module is integrated in the automobile master controller, and the MCU main control module is connected with the light band driving module through an I/O (input/output) port of the interface module. This neotype control circuit design of car streamer lamp based on singlechip, and the integration has step-down steady voltage circuit board in the control circuit, to MCU host system, lamp area drive module provides stable operating voltage, the circuit of the MCU host system of being convenient for simultaneously sends corresponding pwm and gives red green blue pin of led driver chip in the lamp area drive module, control corresponding color change, can further improve driving and passenger's travelling comfort.
Description
Technical Field
The utility model relates to the technical field of automobile electronics, in particular to a control circuit of an automobile traffic light based on a single chip microcomputer.
Background
Automobile streamer lamp area controlling means on the existing market, adopt ordinary resistance series-parallel connection mode output current control LED lamp mostly, this kind of drive mode receives input voltage, LED lamp temperature and resistance precision influence are great, the electric current and the luminous intensity that lead to crossing the LED lamp are unstable, the pattern and the effect that its final presentation came out are more single, be difficult to satisfy car user's operation requirement, and part LED driver adopts then to adopt ordinary constant current source to drive, when LED lamp power ratio is than higher, power requirement is with higher to the triode as switching action, furthermore, this kind of mode circuit cost of manufacture is high and circuit performance can be unstable, and then lead to the condition that light scintillation appears.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the problems that the control circuit of the lamp strip in the prior art is high in manufacturing cost and possibly unstable in circuit performance, so that the control circuit of the automobile flow lamp based on the single chip microcomputer is provided.
In order to solve the technical problems, the control circuit of the automotive traffic light based on the single chip microcomputer comprises an MCU main control module, a power supply module, an interface module and a light band driving module, wherein the MCU main control module is connected with a Bluetooth module used for receiving a control signal sent from a mobile terminal through a serial peripheral interface, the MCU main control module is in interactive communication with an automotive main control through a CAN bus module, the power supply module is integrated in the automotive main control, the MCU main control module is connected with the light band driving module through an I/O port of the interface module, the interface module comprises a power supply part interface, a light band part interface and a burning port part interface, and the light band part interface integrates the light band driving module in a common cathode mode.
In an embodiment of the present invention, the MCU master control module includes a reset circuit, an external crystal oscillator circuit, and an external debug/burn interface.
In one embodiment of the utility model, the power module supplies 12V direct current power for the automobile storage battery, and the output end of the power module is connected with a voltage reduction and stabilization circuit board.
In an embodiment of the utility model, the buck regulator circuit board comprises a power chip converting DC-DC 12V into 5V and a positive voltage regulator converting LDO 5V into 3.3V, the power chip converting DC-DC 12V into 5V adopts SY8113, and the DC 12V is converted into the required 5V voltage through DC 12V to supply power to the CAN bus module.
In an embodiment of the utility model, the LDO 5V to 3.3V positive voltage regulator adopts ME6216A33PG, wherein the input end of the LDO positive voltage regulator is connected to obtain the output voltage of a power chip with DC-DC 12V to 5V, and the LDO positive voltage regulator reduces the voltage to 3.3V to supply power for the MCU main control module and the Bluetooth module.
In an embodiment of the present invention, the lamp strip driving module includes 9 LED lamp strips, wherein each LED lamp strip is integrated with an NPN transistor and a PNP transistor.
In one embodiment of the utility model, the Bluetooth module adopts a BT3L-G module which is composed of a high-integration Bluetooth chip TLSR8250F512GT32 and a small number of peripheral circuits.
Compared with the prior art, the technical scheme of the utility model has the following advantages: this neotype control circuit design of car streamer lamp based on singlechip, and the integration has step-down steady voltage circuit board in the control circuit, to MCU host system, lamp area drive module provides stable operating voltage, the circuit of the MCU host system of being convenient for simultaneously sends corresponding pwm and gives red green blue pin of led driver chip in the lamp area drive module, control corresponding color change, can further improve driving and passenger's travelling comfort.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.
FIG. 1 is a schematic flow control diagram of a control circuit of an automobile traffic light based on a single chip microcomputer;
FIG. 2 is a schematic diagram of an MCU master control module in a control circuit of an automobile traffic light based on a single chip microcomputer;
FIG. 3 is a schematic circuit diagram of a power chip in a control circuit of an automotive headlamp based on a single chip microcomputer;
FIG. 4 is a schematic circuit diagram of a positive voltage regulator in a control circuit of an automotive headlamp based on a single chip microcomputer;
FIG. 5 is a schematic circuit diagram of a power supply interface in a control circuit of a vehicular traffic light based on a single chip;
FIG. 6 is a schematic circuit diagram of a lamp strip part interface in a control circuit of an automobile traffic light based on a single chip microcomputer;
fig. 7 is a single-group circuit schematic diagram of a lamp strip driving module in a control circuit of an automobile flow lamp based on a single-chip microcomputer;
fig. 8 is a schematic diagram of a bluetooth module in a control circuit of an automobile traffic light based on a single chip microcomputer.
Detailed Description
As shown in fig. 1, this embodiment provides a control circuit of car streamer lamp based on singlechip, including MCU host system, power module, interface module and lamp area drive module, MCU host system have through serial peripheral interface connection to be connected with and be used for receiving the bluetooth module who removes the control signal that the end sent, MCU host system carry out mutual communication between controlling through CAN bus module and car, power module integrate in car is always controlled, MCU host system be connected with lamp area drive module through interface module's IO mouth, interface module contain power section interface, lamp area part interface, burn mouthful part interface, wherein lamp area part interface adopt the mode of common cathode to integrate lamp area drive module.
Further, as shown in fig. 6, the tape portion interface utilizes a common cathode manner to control the 9-way tape by the tape driving portion. The burning port part can be connected with the singlechip to carry out program burning and replacement.
The MCU master control module comprises a reset circuit, an external crystal oscillator circuit and an external debugging/burning interface.
As shown in fig. 2, the CKS32F103C8T6 chip of the chinese core is used in this embodiment.
The power supply voltage of the chip is 3.3V, and the chip is provided with a CAN interface (2.0B active). Contains 3 16-bit timers, each having up to 4 for PWM, to facilitate control of the 9-way LED lamp.
The power module supplies 12V direct current power for the automobile storage battery, and meanwhile, the output end of the power module is connected with a voltage reduction and stabilization circuit board.
As shown in fig. 5, the power supply interface includes functions of reverse connection prevention, TVS protection, etc., and D2 is a TVS protection.
The voltage reduction and stabilization circuit board comprises a power chip for converting DC-DC 12V into 5V and a positive voltage stabilizer for converting LDO 5V into 3.3V, the power chip for converting DC-DC 12V into 5V adopts SY8113, and the DC 12V is converted into required 5V voltage to supply power for the CAN bus module.
As shown in the schematic diagram of the power chip circuit in fig. 3, the SY8113 power chip used in this embodiment is a high-efficiency 500kHz synchronous motor buck DC-DC converter, which can output 3A current. SY8113 has a wide input range, a working voltage ranging from 4.5V to 18V, and has very low RDS (ON) and low conduction loss by integrating a main power switch and a synchronous switch. Low output voltage ripple and small external inductor capacitor size reach 500kHz switching frequency. An architecture that employs instantaneous pulse width modulation to achieve high speed transient response gradually shuts down applications.
It is characterized in that:
low RDS (on) of internal switch (top/bottom): 80m omega/40 m omega
4.5-18V input voltage range
3A output current capability
500kHz switching frequency
Transient PWM architecture response to achieve fast transients
Internal soft start limiting inrush current
0.6V reference voltage of +/-1.5%
Through the official recommended circuit design of the SY8113 chip, the direct current 12V is converted into the required 5V voltage to supply power to the main control chip. The whole working current of the 5V power supply part is within 300mA, and the power supply scheme is designed to be more than 1A, so that the whole working requirement is met.
The LDO 5V change 3.3V's positive voltage regulator adopt ME6216A33PG, wherein the output voltage that obtains DC-DC 12V change 5V's power chip is connected to the input of LDO positive voltage regulator, and LDO positive voltage regulator steps down to 3.3V again simultaneously, supplies power for MCU main control module and bluetooth module.
As shown in the schematic diagram of the positive voltage regulator circuit in fig. 4, ME6216a33PG used in this embodiment is a high-precision, low-power consumption positive voltage regulator manufactured by CMOS technology. Which provides a large current with a significantly small voltage difference.
It is characterized in that:
high-precision output voltage: plus or minus 1 percent;
output voltage: 1.0V-5.0V;
maximum operating voltage: 6V;
very low quiescent bias current (Typ =6.0 μ Α);
the load carrying capacity is strong: iout =300mA when Vin =4.3V and Vout = 3.3V;
extremely low input-output voltage difference;
110mV@ IOUT =100mA
240mV@ IOUT =200mA
good input stability
The lamp strip driving module comprises 9 paths of LED lamp strips, wherein each path of LED lamp strip is integrated with an NPN triode and a PNP triode.
As shown in fig. 7, in the present embodiment, the MCU master control module is used, and the I/O port drives the NPN transistor (Q6, etc.) to increase the driving capability, so as to drive the PNP transistor (Q1, etc.) to control the 9 LED strips. The PNP triode is in a large-package type, and the heat dissipation capacity is improved, so that the purpose of long-time excessive current without serious heating is achieved.
The Bluetooth module adopts a BT3L-G module, which is composed of a high-integration Bluetooth chip TLSR8250F512GT32 and a small amount of peripheral circuits.
As shown in fig. 8, the BT3L-G module in this embodiment is a low-power embedded bluetooth module developed by doodle intelligence, and has a bluetooth network communication protocol stack and rich library functions built therein. BT3L-G contains 32-bit MCU with low power consumption, Bluetooth 5.0/2.4G Radio, 4Mbits flash, 48Kbyte SRAM, and 9 reusable IO ports.
It is characterized in that:
the built-in low-power consumption 32-bit MCU can be used as an application processor.
The main frequency supports 48 MHz
Working voltage: 1.8V-3.6V, and the module can be started between 1.8V and 2.7V, but the optimal radio frequency performance cannot be ensured; between 2.8V and 3.6V, the module has normal overall performance.
Peripheral equipment: 5xPWM, 1xUART
Bluetooth RF characteristics
Low power consumption Bluetooth 4.2/5.0
Radio frequency data rate up to 2Mbps
TX transmit power: +10dBm
RX reception sensitivity: -94.5dBm @1Mbps
Embedded hardware AES encryption
Matched with an onboard PCB antenna, the gain of the antenna is 2.5dBi
Working temperature: -40 ℃ to +105 DEG C
The scheme is connected with a mobile phone APP through Bluetooth, and functions such as remote control and online upgrading can be performed.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.
Claims (7)
1. The utility model provides a control circuit of car headlamp based on singlechip which characterized in that: including MCU host system, power module, interface module and lamp area drive module, MCU host system have through serial peripheral hardware interface connection and be used for receiving the bluetooth module who follows the control signal who removes the end and send, MCU host system carry out mutual communication between always controlling through CAN bus module and car, power module integrate in the car always controls in, MCU host system pass through interface module's IO mouth and be connected with lamp area drive module, interface module contain power part interface, lamp area part interface, burn mouthful partial interface, wherein lamp area part interface adopt the mode of sharing the negative pole to be integrated with lamp area drive module.
2. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 1, characterized in that: the MCU master control module comprises a reset circuit, an external crystal oscillator circuit and an external debugging/burning interface.
3. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 1, characterized in that: the power module supplies 12V direct current power for the automobile storage battery, and meanwhile, the output end of the power module is connected with a voltage reduction and stabilization circuit board.
4. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 3, characterized in that: the voltage reduction and stabilization circuit board comprises a power chip for converting DC-DC 12V into 5V and a positive voltage stabilizer for converting LDO 5V into 3.3V, the power chip for converting DC-DC 12V into 5V adopts SY8113, and the DC 12V is converted into required 5V voltage to supply power for the CAN bus module.
5. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 4, characterized in that: the LDO 5V change 3.3V's positive voltage regulator adopt ME6216A33PG, wherein the output voltage that obtains DC-DC 12V change 5V's power chip is connected to the input of LDO positive voltage regulator, and LDO positive voltage regulator steps down to 3.3V again simultaneously, supplies power for MCU main control module and bluetooth module.
6. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 1, characterized in that: the lamp strip driving module comprises 9 paths of LED lamp strips, wherein each path of LED lamp strip is integrated with an NPN triode and a PNP triode.
7. The control circuit of the automobile traffic light based on the single chip microcomputer according to claim 1, characterized in that: the Bluetooth module adopts a BT3L-G module, which is composed of a high-integration Bluetooth chip TLSR8250F512GT32 and a small amount of peripheral circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122479655.XU CN215935138U (en) | 2021-10-15 | 2021-10-15 | Control circuit of automobile traffic light based on single chip microcomputer |
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| CN202122479655.XU CN215935138U (en) | 2021-10-15 | 2021-10-15 | Control circuit of automobile traffic light based on single chip microcomputer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115397063A (en) * | 2022-10-27 | 2022-11-25 | 中科(深圳)无线半导体有限公司 | miniLED drive circuit |
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2021
- 2021-10-15 CN CN202122479655.XU patent/CN215935138U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115397063A (en) * | 2022-10-27 | 2022-11-25 | 中科(深圳)无线半导体有限公司 | miniLED drive circuit |
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