LED driving and vehicle-mounted machine interaction circuit

Abstract

The utility model discloses an LED drive and car machine interaction circuit, including U2 chip module, Q10 chip module, MOS tube module, the third pin of U2 chip module is connected with PD LED + phase, the second pin is connected with VCC, the first pin is connected with the third pin of MOS tube module and then is connected with the third pin of Q10 chip module together, the other pins of U2 chip module are grounded, the first pin of MOS tube module is connected with DRL / PLON, the second pin is grounded, and the third pin is connected with the second pin of MOS tube module. According to the utility model, the TL431 chip is used as a comparator for LED sampling input, the comparator outputs and controls the chip Q10 to pull up a level and pull down the level to interact with a vehicle machine, and the use of a single-chip microcomputer is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle computer driving, in particular to an LED driving and vehicle computer interaction circuit. Background Art

[0002] The existing solution for communicating with the vehicle computer is based on the communication of the single-chip microcomputer. A single-chip microcomputer is added to the vehicle computer to detect the LED status in real time and feed back to the vehicle computer. Adding an extra single-chip microcomputer just for detecting the LED increases the cost and reduces the resource utilization. Utility Model Content

[0003] The purpose of the utility model is to provide an LED driving and vehicle computer interaction circuit to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: an LED drive and vehicle computer interaction circuit, characterized in that it includes a U2 chip module, a Q10 chip module, and a MOS tube module, the third pin of the U2 chip module is connected to PD LED+, the second pin is connected to VCC, the first pin is connected to the third pin of the MOS tube module, and then connected to the third pin of the Q10 chip module, the other pins of the U2 chip module are grounded, the first pin of the MOS tube module is connected to DRL / PLON, the second pin is grounded, and the other pins of the Q10 chip module are grounded.

[0005] Further, the U2 chip module includes a resistor R42, a resistor R41, a resistor R44, a resistor R46, a resistor R47, and a chip U2, and the chip U2 model is TL431;

[0006] The first end of the resistor R46 is grounded, the second end of the resistor R46 is connected to the first end of the resistor R44, the second end of the resistor R44 is connected to the first end of the resistor R41 and the second pin of the chip U2, the second end of the resistor R41 is connected to VCC, the third pin of the chip U2 is grounded, the first pin of the chip U2 is connected to the first end of the resistor R42 and the first end of the resistor R47, the second end of the resistor R47 is grounded, and the second end of the resistor R42 is connected to PD LED+.

[0007] In the above technical solution, the TL431 chip in the U2 chip module is connected to the vehicle LED lighting system as a comparator, the input end samples the vehicle LED lighting system, and the output end outputs the result to the Q10 chip module.

[0008] Furthermore, the VCC is the power supply voltage for powering the LED driver and the vehicle-computer interaction circuit, the PD LED+, where PD is a photodiode, is a device that can convert light signals into electrical signals, LED+ represents the positive pole of the LED, and LED represents a light-emitting diode that can convert electrical energy into light energy.

[0009] In the above technical solution, it is stipulated that the circuit power supply voltage is VCC, and the circuit is connected to the vehicle LED lighting system.

[0010] Further, the Q10 chip module includes a chip Q10, a resistor R48, a capacitor C44, and a diode D15;

[0011] The 1st pin and the 5th pin of the chip Q10 are commonly connected to the first end of the resistor R48, the second end of the resistor R48 is grounded, the 6th pin of the chip is connected to the first end of the diode D15, the second end of the diode D15 is connected to the first end of the capacitor C44, the second end of the capacitor C44 is grounded, the 4th pin of the chip is grounded, and the 2nd pin and the 3rd pin of the chip are commonly connected to the node where the second end of the resistor R46 and the first end of the resistor R44 in the U2 chip module are connected.

[0012] In the above technical solution, the comparator output control chip Q10 pulls up and down the level to interact with the vehicle computer.

[0013] Furthermore, the MOS tube module includes a MOS tube Q17, and the MOS tube Q17 is an n-channel enhancement type MOS tube;

[0014] The first pin of the MOS transistor Q17 is connected to DRL / PLON, the second pin of the transistor is grounded, and the third pin of the transistor is connected to the node where the Q10 chip module is connected to the U2 chip module.

[0015] In the above technical solution, the MOS tube Q17 is used as a circuit switch.

[0016] Furthermore, the DRL / PLON, wherein DRL represents the daytime running lights of the automobile system, and PLON represents the standby switch of the circuit.

[0017] In the above technical solution, the switch is connected to the daytime running lights of the external automobile system.

[0018] Compared with the prior art, the beneficial effect achieved by the utility model is as follows: the utility model uses a 431 chip as a comparator for LED sampling input, and the comparator output controls a transistor to pull up and down the level to interact with the vehicle computer. Without adding a single-chip microcomputer, a pure hardware method is used to interact with the vehicle computer, which improves the problem of the prior art that an additional single-chip microcomputer must be added to detect the status of the LED and provide real-time feedback to the vehicle computer, resulting in low utilization of single-chip microcomputer resources, thereby saving resources and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a circuit connection diagram of the LED driver and the vehicle computer interaction circuit; DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1 The utility model provides a technical solution: an LED drive and vehicle computer interaction circuit, characterized in that it includes a U2 chip module, a Q10 chip module, and a MOS tube module. The third pin of the U2 chip module is connected to the PD LED+, the second pin is connected to VCC, the first pin is connected to the third pin of the MOS tube module, and then connected to the third pin of the Q10 chip module. The other pins of the U2 chip module are grounded, the first pin of the MOS tube module is connected to DRL / PLON, the second pin is grounded, and the other pins of the Q10 chip module are grounded.

[0023] The U2 chip module includes a resistor R42, a resistor R41, a resistor R44, a resistor R46, a resistor R47, and a chip U2, and the chip U2 model is TL431;

[0024] The first end of the resistor R46 is grounded, the second end of the resistor R46 is connected to the first end of the resistor R44, the second end of the resistor R44 is connected to the first end of the resistor R41 and the second pin of the chip U2, the second end of the resistor R41 is connected to VCC, the third pin of the chip U2 is grounded, the first pin of the chip U2 is connected to the first end of the resistor R42 and the first end of the resistor R47, the second end of the resistor R47 is grounded, and the second end of the resistor R42 is connected to PD LED+.

[0025] The TL431 chip in the U2 chip module is connected to the vehicle LED lighting system as a comparator. The input end samples the vehicle LED lighting system, and the output end outputs the result to the Q10 chip module.

[0026] The VCC is the power supply voltage for the LED driver and vehicle computer interaction circuit, the PD LED+, where PD is a photodiode, is a device that can convert light signals into electrical signals, LED+ represents the positive pole of the LED, and LED represents a light emitting diode that can convert electrical energy into light energy.

[0027] The circuit power supply voltage is specified to be VCC, and the circuit is connected to the vehicle LED lighting system.

[0028] The Q10 chip module includes a chip Q10, a resistor R48, a capacitor C44, and a diode D15;

[0029] The 1st pin and the 5th pin of the chip Q10 are commonly connected to the first end of the resistor R48, the second end of the resistor R48 is grounded, the 6th pin of the chip is connected to the first end of the diode D15, the second end of the diode D15 is connected to the first end of the capacitor C44, the second end of the capacitor C44 is grounded, the 4th pin of the chip is grounded, and the 2nd pin and the 3rd pin of the chip are commonly connected to the node where the second end of the resistor R46 and the first end of the resistor R44 in the U2 chip module are connected.

[0030] The comparator output control chip Q10 pulls up and down the level to interact with the vehicle computer.

[0031] The MOS tube module includes a MOS tube Q17, and the MOS tube Q17 is an n-channel enhancement type MOS tube;

[0032] The first pin of the MOS tube Q17 is connected to DRL / PLON, the second pin of the MOS tube is grounded, and the third pin of the transistor is connected to the node where the Q10 chip module and the U2 chip module are connected.

[0033] MOS tube Q17 is used as a circuit switch.

[0034] The DRL / PLON, wherein DRL represents the daytime running light of the automobile system, and PLON represents the standby switch of the circuit.

[0035] Connect the switch to the daytime running lights of the external vehicle system.

[0036] The working principle of the utility model: the circuit can interact with the vehicle computer through pure hardware without a single-chip microcomputer, use the 431 chip U2 as a comparator for LED sampling input, and the U2 output end control chip Q10 to pull up and down the level to interact with the vehicle computer. At the same time, the MOS tube is connected to the outside world as a switch, omitting the step of adding a single-chip microcomputer to provide real-time feedback of the LED status to the vehicle computer.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device 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 device.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A LED driver and vehicle computer interaction circuit, characterized in that: It includes a U2 chip module, a Q10 chip module, and a MOS tube module. The third pin of the U2 chip module is connected to the PD LED+, the second pin is connected to VCC, the first pin is connected to the third pin of the MOS tube module, and then connected to the third pin of the Q10 chip module. The other pins of the U2 chip module are grounded, the first pin of the MOS tube module is connected to DRL / PLON, the second pin is grounded, and the other pins of the Q10 chip module are grounded.

2. The LED driver and vehicle computer interaction circuit according to claim 1, characterized in that: The U2 chip module includes a resistor R42, a resistor R41, a resistor R44, a resistor R46, a resistor R47, and a chip U2, and the chip U2 model is TL431; The first end of the resistor R46 is grounded, the second end of the resistor R46 is connected to the first end of the resistor R44, the second end of the resistor R44 is connected to the first end of the resistor R41 and the second pin of the chip U2, the second end of the resistor R41 is connected to VCC, the third pin of the chip U2 is grounded, the first pin of the chip U2 is connected to the first end of the resistor R42 and the first end of the resistor R47, the second end of the resistor R47 is grounded, and the second end of the resistor R42 is connected to PD LED+.

3. The LED driving and vehicle computer interaction circuit according to claim 2 is characterized in that: The VCC is the power supply voltage for the LED driver and vehicle computer interaction circuit, the PD LED+, where PD is a photodiode, is a device that can convert light signals into electrical signals, LED+ represents the positive pole of the LED, and LED represents a light emitting diode that can convert electrical energy into light energy.

4. The LED driving and vehicle computer interaction circuit according to claim 1, characterized in that: The Q10 chip module includes a chip Q10, a resistor R48, a capacitor C44, and a diode D15; The 1st pin and the 5th pin of the chip Q10 are commonly connected to the first end of the resistor R48, the second end of the resistor R48 is grounded, the 6th pin of the chip is connected to the first end of the diode D15, the second end of the diode D15 is connected to the first end of the capacitor C44, the second end of the capacitor C44 is grounded, the 4th pin of the chip is grounded, and the 2nd pin and the 3rd pin of the chip are commonly connected to the node where the second end of the resistor R46 and the first end of the resistor R44 in the U2 chip module are connected.

5. The LED driving and vehicle computer interaction circuit according to claim 1, characterized in that: The MOS tube module includes a MOS tube Q17, and the transistor Q17 is an n-channel enhancement type MOS tube; The first pin of the MOS transistor Q17 is connected to DRL / PLON, the second pin of the transistor is grounded, and the third pin of the transistor is connected to the node where the Q10 chip module is connected to the U2 chip module.

6. The LED driving and vehicle computer interaction circuit according to claim 5, characterized in that: The DRL / PLON, wherein DRL represents the daytime running light of the automobile system, and PLON represents the standby switch of the circuit.

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