Vehicle ECU wake-up circuit, electronic device and vehicle

Abstract

The present application provides a vehicle ECU wake-up circuit, an electronic device and a vehicle, wherein the wake-up circuit includes: an electrostatic protection unit having a first end and a second end, the first end of the electrostatic protection unit being used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit being grounded; an anti-ground drift unit having a first end and a second end, the first end of the anti-ground drift unit being electrically connected to the first end of the electrostatic protection unit; an ECU voltage generation unit having a first end and a second end, the first end of the ECU voltage generation unit being electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generation unit being used to output a voltage signal, the second end of the ECU voltage generation unit being used to be electrically connected to the vehicle ECU, and the voltage signal being used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of circuit design, and in particular to a vehicle ECU wake-up circuit, an electronic device and a vehicle. Background Art

[0002] In the era of smart cars, vehicles are frequently used and updated, and are used more and more in various scenarios, resulting in endless awakening needs.

[0003] Due to the limitations of vehicle size and weight, the capacity of the vehicle battery is also relatively subject to many constraints, and the sleep wake-up function has been put on the agenda. Faced with various harsh scenarios, an efficient, simple and widely applicable vehicle ECU wake-up circuit is urgently needed.

[0004] Some solutions have high requirements for the wiring harness and electrical layout of the vehicle, and cannot be identified when the ground drift is relatively large or the loop impedance is large. In addition, some sleep logics have unreasonable scenarios. For example, in actual use, when repairing a vehicle at a 4S shop, the OBD (On-Board Diagnostics) box is forgotten to be unplugged, causing problems such as power feeding of the vehicle. Summary of the invention

[0005] The main purpose of the present application is to provide a vehicle ECU wake-up circuit, an electronic device and a vehicle to solve the problem of limited applicable scenarios of the vehicle ECU wake-up circuit in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a vehicle ECU wake-up circuit is provided, including: an electrostatic protection unit, having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit, having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generating unit, having a first end and a second end, the first end of the ECU voltage generating unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generating unit is used to output a voltage signal, the second end of the ECU voltage generating unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU.

[0007] Furthermore, the anti-ground drift unit includes: a voltage regulator diode, a cathode of the voltage regulator diode is electrically connected to a first end of the electrostatic protection unit, and an anode of the voltage regulator diode is electrically connected to a first end of the ECU voltage generating unit.

[0008] Furthermore, the ECU voltage generating unit includes: a first voltage stabilizing module having an input end and an output end, the input end of the first voltage stabilizing module is electrically connected to the second end of the anti-ground drift unit, and the output end of the first voltage stabilizing module is used to output the voltage signal.

[0009] Furthermore, the ECU voltage generating unit also includes: a first diode, the anode of the first diode is electrically connected to the second end of the anti-ground drift unit, and the cathode of the first diode is electrically connected to the input of the first voltage stabilizing module; a second diode, the anode of the second diode is used to input the second wake-up trigger signal, and the cathode of the second diode is electrically connected to the input of the first voltage stabilizing module.

[0010] Furthermore, the ECU voltage generating unit also includes: a first voltage divider module, having a first end and a second end, the first end of the first voltage divider module being used to input a power-on self-locking signal of the MCU; a third diode, the anode of the third diode being electrically connected to the second end of the first voltage divider module, and the cathode of the third diode being electrically connected to the input of the first voltage stabilizing module.

[0011] Furthermore, the ECU voltage generating unit includes: a pulse voltage generating module, having an input end and an output end, the input end of the pulse voltage generating module is electrically connected to the second end of the anti-ground drift unit; a second voltage stabilizing module, having an input end and an output end, the input end of the second voltage stabilizing module is electrically connected to the output end of the pulse voltage generating module, and the output end of the second voltage stabilizing module is used to output the voltage signal.

[0012] Further, the pulse voltage generating module includes: a second voltage dividing module, a first resistance module, a first capacitor module and a first field effect transistor, the first end of the second voltage dividing module and the first end of the first resistance module are respectively electrically connected to the second end of the anti-ground drift unit, the second end of the second voltage dividing module is electrically connected to the drain of the first field effect transistor, the drain of the first field effect transistor is electrically connected to the input end of the second voltage stabilizing module, the second end of the first resistance module and the first end of the first capacitor module are respectively electrically connected to the gate of the first field effect transistor, and the second end of the first capacitor module and the source of the first field effect transistor are grounded.

[0013] Furthermore, the pulse voltage generating module further includes a second resistance module, a first end of the second resistance module is electrically connected to a second end of the first resistance module, and a second end of the second resistance module is grounded.

[0014] Furthermore, the second voltage stabilizing module includes: a third resistor module, a fourth resistor module, a fifth resistor module, a transistor and a second field effect transistor, the first end of the third resistor module and the base of the transistor are respectively electrically connected to the output end of the pulse voltage generating module, the second end of the third resistor module and the emitter of the transistor are grounded, the collector of the transistor is electrically connected to the first end of the fourth resistor module, the second end of the fourth resistor module is respectively electrically connected to the first end of the fifth resistor module and the gate of the second field effect transistor, the second end of the fifth resistor module and the source of the second field effect transistor are respectively electrically connected to the power supply end, and the drain of the second field effect transistor is used to output the voltage signal.

[0015] Furthermore, the second voltage stabilizing module further includes: a second capacitor module, a first end of the second capacitor module is electrically connected to the drain of the second field effect transistor, and a second end of the second capacitor module is grounded.

[0016] Further, the electrostatic protection unit includes: a TVS diode having a first end and a second end, the first end of the TVS diode is used to input the first wake-up trigger signal, and the second end of the TVS diode is grounded.

[0017] Further, the electrostatic protection unit includes: an ESD capacitor having a first end and a second end, the first end of the ESD capacitor is used to input the first wake-up trigger signal, and the second end of the ESD capacitor is grounded.

[0018] According to another aspect of the present application, an electronic device is provided, comprising: any one of the vehicle ECU wake-up circuits; and a vehicle ECU electrically connected to the vehicle ECU wake-up circuit.

[0019] Furthermore, the vehicle ECU includes: an MCU; a power chip having a first end and a second end, the first end of the power chip being electrically connected to the vehicle ECU wake-up circuit, and the second end of the power chip being electrically connected to the MCU.

[0020] According to another aspect of the present application, a vehicle is provided, comprising: any one of the vehicle ECU wake-up circuits; a vehicle ECU electrically connected to the vehicle ECU wake-up circuit; and a vehicle body having a accommodating cavity, wherein the vehicle ECU wake-up circuit and the vehicle ECU are installed in the accommodating cavity.

[0021] Applying the technical solution of the present application, the above-mentioned wake-up circuit includes: an electrostatic protection unit, having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit, having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generation unit, having a first end and a second end, the first end of the ECU voltage generation unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generation unit is used to output a voltage signal, the second end of the ECU voltage generation unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 A schematic diagram of a vehicle ECU wake-up circuit according to an embodiment of the present application is shown;

[0024] Figure 2 A schematic diagram of another vehicle ECU wake-up circuit according to an embodiment of the present application is shown;

[0025] Figure 3 A schematic diagram of another vehicle ECU wake-up circuit according to an embodiment of the present application is shown;

[0026] Figure 4 A schematic diagram of an electronic device according to an embodiment of the present application is shown;

[0027] Figure 5 A schematic diagram of another electronic device according to an embodiment of the present application is shown.

[0028] The above drawings include the following reference numerals:

[0029] 01. Vehicle ECU wake-up circuit; 02. Vehicle ECU; 03. Power chip; 04. MCU; 10. Electrostatic protection unit; 11. TVS diode; 12. ESD capacitor; 20. Anti-ground drift unit; 21. Zener diode; 30. ECU voltage generation unit; 31. First voltage stabilizing module; 32. Pulse voltage generation module; 321. Second voltage divider module; 322. First resistor module; 323. First capacitor module; 324. First field effect transistor; 325. Second resistor module; 33. Second voltage stabilizing module; 331. Third resistor module; 332. Fourth resistor module; 333. Fifth resistor module; 334. Transistor; 335. Second field effect transistor; 336. Second capacitor module; 40. First diode; 50. Second diode; 60. First voltage divider module; 70. Third diode. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0033] For the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0034] ECU: Electronic Control Unit, electronic control unit;

[0035] MCU: Microcontroller Unit, single-chip microcomputer;

[0036] PWM: Pulse width modulation;

[0037] ESD: Electro-Static discharge, electrostatic discharge;

[0038] TVS: Transient voltage suppression diode, transient voltage suppression diode;

[0039] PCB: Printed Circuit Board, printed circuit board;

[0040] OBD: On-Board Diagnostics, vehicle automatic diagnostic system;

[0041] Ground drift: The ground potential drift phenomenon caused by the impedance problem of the current return path of the component.

[0042] As introduced in the background technology, the applicable scenarios of the wake-up circuit of the vehicle ECU in the existing solution are limited. In order to solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art, the present application proposes a vehicle ECU wake-up circuit, an electronic device and a vehicle.

[0043] According to an embodiment of the present application, a vehicle ECU wake-up circuit is provided, which can be applied to new energy vehicles, traditional gasoline vehicles or diesel vehicles. Among them, the effective level when the wake-up source wakes up is a high level, and the invalid level is a high impedance or a low level. The wake-up circuit is used to process any high-effective wake-up source, and after processing, it is sent to the power chip, which supplies power to the controller, or wakes up other power supplies of the controller according to the generated power.

[0044] Figure 1 is a schematic diagram of a vehicle ECU wake-up circuit according to an embodiment of the present application, such as Figure 1As shown, the wake-up circuit includes: an electrostatic protection unit 10, having a first end and a second end, the first end of the electrostatic protection unit 10 is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit 10 is grounded; an anti-ground drift unit 20, having a first end and a second end, the first end of the anti-ground drift unit 20 is electrically connected to the first end of the electrostatic protection unit 10; an ECU voltage generation unit 30, having a first end and a second end, the first end of the ECU voltage generation unit 30 is electrically connected to the second end of the anti-ground drift unit 20, the second end of the ECU voltage generation unit 30 is used to output a voltage signal, the second end of the ECU voltage generation unit 30 is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. Among them, the electrostatic protection unit uses an ESD protection tube or an ESD capacitor for electrostatic protection. The devices used meet the requirements of 15KV air discharge and 8KV contact discharge. This module includes two designs of high-speed interface and low-speed interface. The high-speed interface uses an ESD tube and the low-speed interface uses an ESD capacitor. After the electrostatic protection unit is processed, the voltage is relatively stable.

[0045] In actual use, some 4S shops may forget to unplug the OBD box when repairing the car, causing problems such as vehicle power supply. The above vehicle ECU wake-up circuit can solve such problems well and is suitable for a variety of scenarios.

[0046] In the prior art, the requirements for the wiring harness and electrical layout of the vehicle are relatively high, and it is impossible to identify the situation where the ground drift is relatively large or the loop impedance is large. In order to solve the problem of vehicle ground drift, Figure 2 As shown, the anti-ground drift unit 20 includes: a voltage regulator diode 21, the cathode of the voltage regulator diode 21 is electrically connected to the first end of the electrostatic protection unit 10, and the anode of the voltage regulator diode 21 is electrically connected to the first end of the ECU voltage generating unit 30. Among them, the voltage regulator diode can select a 5.1V voltage regulator, which can effectively eliminate ground drift and prevent accidental touch. The current selection of the voltage regulator is a general choice after investigation. In special circumstances, other voltage regulators with breakdown voltages can be selected according to actual needs. In the absence of a wake-up signal, the maximum measured ground drift is about 4V. Due to the existence of the voltage regulator, the voltage is isolated and cannot be transmitted to the subsequent circuit. When the wake-up switch is turned on normally, a 24V wake-up signal will be generated, which exceeds the maximum reverse breakdown voltage of the voltage regulator. The voltage regulator is reversely conducted, and the subsequent modules start to work.

[0047] In order to convert each unstable voltage into a stable voltage and isolate it from external influences, such as Figure 2 As shown, the ECU voltage generating unit 30 includes: a first voltage stabilizing module 31 having an input end and an output end, the input end of the first voltage stabilizing module 31 is electrically connected to the second end of the anti-ground drift unit 20, and the output end of the first voltage stabilizing module 31 is used to output the voltage signal.

[0048] In the case of multiple wakeup sources, such as Figure 2 As shown, the ECU voltage generating unit 30 further includes: a first diode 40, the anode of the first diode 40 is electrically connected to the second end of the anti-ground drift unit 20, and the cathode of the first diode 40 is electrically connected to the input of the first voltage stabilizing module 31; a second diode 50, the anode of the second diode 50 is used to input the second wake-up trigger signal, and the cathode of the second diode 50 is electrically connected to the input of the first voltage stabilizing module 31. The second diode can merge multiple wake-up sources.

[0049] At the same time, due to the level-to-pulse conversion, the wake-up signal input to the second diode does not maintain a high level, and the normal operation of the system cannot be guaranteed. The first voltage divider module and the third diode can be used to add power-on self-locking. Power-on self-locking means that the MCU pulls out a control line to control the WAKE pin of the power chip, so that the single board can be powered off at any time, realizing functions such as power-on self-locking and power-off delay. Figure 2 As shown, the ECU voltage generating unit 30 further includes: a first voltage dividing module 60 having a first end and a second end, wherein the first end of the first voltage dividing module 60 is used to input a power-on self-locking signal of the MCU; a third diode 70, wherein the anode of the third diode 70 is electrically connected to the second end of the first voltage dividing module 60, and the cathode of the third diode 70 is electrically connected to the input of the first voltage stabilizing module 31.

[0050] The structure of the first voltage stabilizing module, the first diode, the second diode, the first voltage divider module and the third diode reuses the voltage conversion module, which greatly simplifies the circuit of multiple wake-up sources, greatly saves devices, and reduces the PCB layout area.

[0051] In applications such as OBD and some wake-up signals in charging guns, such as Figure 3 As shown, the ECU voltage generating unit 30 includes: a pulse voltage generating module 32, which has an input end and an output end, and the input end of the pulse voltage generating module 32 is electrically connected to the second end of the anti-ground drift unit 20; a second voltage stabilizing module 33, which has an input end and an output end, and the input end of the second voltage stabilizing module 33 is electrically connected to the output end of the pulse voltage generating module 32, and the output end of the second voltage stabilizing module 33 is used to output the voltage signal. The pulse voltage generating module is mainly used in the scenario where the wake-up signal can be dormant, and the continuous high-level wake-up signal is converted into a single pulse signal. The second voltage stabilizing module is for the convenience of subsequent identification and isolation of the influence of external voltage noise. If some wake-up signals do not have the requirement of voltage-to-pulse conversion, the components in the pulse voltage generating module can be selectively added, such as the KL15 engine ignition signal, etc.

[0052] In an optional embodiment, Figure 3 As shown, the pulse voltage generating module 32 includes: a second voltage dividing module 321, a first resistor module 322, a first capacitor module 323 and a first field effect transistor 324. The first end of the second voltage dividing module 321 and the first end of the first resistor module 322 are respectively electrically connected to the second end of the anti-ground drift unit 20, the second end of the second voltage dividing module 321 is electrically connected to the drain of the first field effect transistor 324, the drain of the first field effect transistor 324 is electrically connected to the input end of the second voltage stabilizing module 33, the second end of the first resistor module 322 and the first end of the first capacitor module 323 are respectively electrically connected to the gate of the first field effect transistor 324, and the second end of the first capacitor module 323 and the source of the first field effect transistor 324 are grounded. Among them, the selection of the first field effect transistor needs to ensure that the voltage between the gate and the source is within the voltage dividing range of the second voltage dividing module and the first resistor module, and the voltage between the source and the drain can withstand the maximum voltage of the wake-up signal. By changing the values ​​of the first resistor module and the first capacitor module, the pulse width can be adjusted to prevent the pulse from being too short and not being collected by the MCU. Taking the wake-up voltage as 24V and the gate turn-on voltage of the first field effect tube as an example, the parasitic capacitance and turn-on time of the MOS tube are both small and can be ignored here. The pulse width t is calculated as shown in Formula 1 and Formula 2:

[0053]

[0054]

[0055] Wherein, R is the resistance of the first resistor module, R=1MΩ; C is the capacitance of the first capacitor module, C=1μF; E is the voltage at the second end of the Zener diode, E=24-5.1=18.9V; Vt is the gate turn-on voltage of the first field effect transistor, V t =2V; calculation yields:

[0056] Specifically, Figure 3 As shown, the pulse voltage generating module 32 further includes a second resistance module 325 , a first end of the second resistance module 325 is electrically connected to a second end of the first resistance module 322 , and a second end of the second resistance module 325 is grounded.

[0057] Among them, Figure 3As shown, the second voltage stabilizing module 33 includes: a third resistor module 331, a fourth resistor module 332, a fifth resistor module 333, a triode 334, and a second field effect transistor 335. The first end of the third resistor module 331 and the base of the triode 334 are electrically connected to the output end of the pulse voltage generating module 32, respectively. The second end of the third resistor module 331 and the emitter of the triode 334 are grounded. The collector of the triode 334 is electrically connected to the first end of the fourth resistor module 332. The second end of the fourth resistor module 332 is electrically connected to the first end of the fifth resistor module 333 and the gate of the second field effect transistor 335, respectively. The second end of the fifth resistor module 333 and the source of the second field effect transistor 335 are electrically connected to the power supply end, respectively. The drain of the second field effect transistor 335 is used to output the voltage signal. Among them, the function of the third resistor module is to prevent the base of the triode from being suspended. The selection of the triode needs to consider V be and V ce The maximum withstand voltage problem, the second field effect tube needs to consider V GS and V DS The maximum withstand voltage.

[0058] In an optional embodiment, Figure 3 As shown, the second voltage stabilizing module 33 further includes: a second capacitor module 336, a first end of the second capacitor module 336 is electrically connected to the drain of the second field effect transistor 335, and a second end of the second capacitor module 336 is grounded. The second capacitor module is used for filtering.

[0059] In one solution, Figure 3 As shown, the electrostatic protection unit 10 includes: a TVS diode 11, having a first end and a second end, the first end of the TVS diode 11 is used to input the first wake-up trigger signal, and the second end of the TVS diode 11 is grounded. The external signal first enters the electrostatic protection unit. If the signal is PWM, or there is a requirement for the bus capacitance, a professional TVS diode is selected.

[0060] Specifically, Figure 3 As shown, the electrostatic protection unit 10 includes: an ESD capacitor 12 having a first end and a second end, the first end of the ESD capacitor 12 is used to input the first wake-up trigger signal, and the second end of the ESD capacitor 12 is grounded. If the external signal is a low-speed signal, the ESD capacitor is preferred, which is cheap and smaller in size. Specifically, the TVS diode and the ESD capacitor can be selected according to actual needs.

[0061] The above-mentioned wake-up circuit of the present application includes: an electrostatic protection unit, having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit, having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generation unit, having a first end and a second end, the first end of the ECU voltage generation unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generation unit is used to output a voltage signal, the second end of the ECU voltage generation unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art.

[0062] According to another typical embodiment of the present application, an electronic device is also provided, such as Figure 4 As shown, it includes: any one of the above-mentioned vehicle ECU wake-up circuits 01; a vehicle ECU 02, which is electrically connected to the above-mentioned vehicle ECU wake-up circuit 01.

[0063] Specifically, Figure 4 As shown, the vehicle ECU 02 includes: an MCU 04 ; a power chip 03 having a first end and a second end, the first end of the power chip 03 being electrically connected to the vehicle ECU wake-up circuit 01 , and the second end of the power chip 03 being electrically connected to the MCU 04 .

[0064] Among them, the general design is to connect DI_WAKE / SBC to the WAKE pin of the power chip to wake up the power chip. In actual use, attention should be paid to the voltage withstand value of the power chip pin and whether voltage division is required. Another possible design is that the DI_WAKE / SBC signal is connected to the MCU's normally powered small core after adding series resistance and voltage division, such as the SCR small core of TC397. The small core recognizes the signal and then sends a control signal to wake up the power chip, that is, from the wake-up circuit to the MCU SCR small core to the power supply and finally to the MCU. This design is rarely used, and the power supply of the small core is separated from that of other cores of the MCU. The small core is powered by normal power and does not power off when in sleep mode. The static current is less than 0.5mA.

[0065] In another optional embodiment, if Figure 5 As shown, the vehicle ECU 02 includes a vehicle ECU wake-up circuit 01 .

[0066] The above-mentioned electronic device of the present application adopts the above-mentioned wake-up circuit, including: an electrostatic protection unit, having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit, having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generation unit, having a first end and a second end, the first end of the ECU voltage generation unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generation unit is used to output a voltage signal, the second end of the ECU voltage generation unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art. The power chip supplies power to the MCU.

[0067] According to another typical embodiment of the present application, a vehicle is also provided, comprising: any one of the above-mentioned vehicle ECU wake-up circuits; a vehicle ECU, electrically connected to the above-mentioned vehicle ECU wake-up circuit; a vehicle body, having a accommodating cavity, and the above-mentioned vehicle ECU wake-up circuit and the above-mentioned vehicle ECU are installed in the above-mentioned accommodating cavity.

[0068] The above-mentioned vehicle of the present application adopts the above-mentioned wake-up circuit, including: an electrostatic protection unit, having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit, having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generation unit, having a first end and a second end, the first end of the ECU voltage generation unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generation unit is used to output a voltage signal, the second end of the ECU voltage generation unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art.

[0069] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0070] 1) Applying the technical solution of the present application, the above-mentioned wake-up circuit includes: an electrostatic protection unit having a first end and a second end, the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; an anti-ground drift unit having a first end and a second end, the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; an ECU voltage generating unit having a first end and a second end, the first end of the ECU voltage generating unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generating unit is used to output a voltage signal, the second end of the ECU voltage generating unit is used to be electrically connected to the vehicle ECU, and the voltage signal is used to wake up the vehicle ECU. The electrostatic protection design and anti-ground drift design of the circuit increase the applicable scenarios of the wake-up circuit of the vehicle ECU, and solve the problem of limited applicable scenarios of the wake-up circuit of the vehicle ECU in the prior art.

[0071] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle ECU wake-up circuit, characterized in that: include: An electrostatic protection unit having a first end and a second end, wherein the first end of the electrostatic protection unit is used to input a first wake-up trigger signal, and the second end of the electrostatic protection unit is grounded; An anti-ground drift unit having a first end and a second end, wherein the first end of the anti-ground drift unit is electrically connected to the first end of the electrostatic protection unit; An ECU voltage generating unit, comprising a first end and a second end, wherein the first end of the ECU voltage generating unit is electrically connected to the second end of the anti-ground drift unit, the second end of the ECU voltage generating unit is used to output a voltage signal, the second end of the ECU voltage generating unit is used to be electrically connected to a vehicle ECU, and the voltage signal is used to wake up the vehicle ECU; Wherein, the ECU voltage generating unit comprises: A pulse voltage generating module, having an input end and an output end, wherein the input end of the pulse voltage generating module is electrically connected to the second end of the anti-ground drift unit; The second voltage stabilizing module has an input end and an output end. The input end of the second voltage stabilizing module is electrically connected to the output end of the pulse voltage generating module. The output end of the second voltage stabilizing module is used to output the voltage signal.

2. The vehicle ECU wake-up circuit according to claim 1, characterized in that: The anti-ground drift unit comprises: A voltage stabilizing diode, wherein a cathode of the voltage stabilizing diode is electrically connected to a first end of the electrostatic protection unit, and an anode of the voltage stabilizing diode is electrically connected to a first end of the ECU voltage generating unit.

3. The vehicle ECU wake-up circuit according to claim 1, characterized in that: The ECU voltage generating unit comprises: The first voltage stabilizing module has an input end and an output end. The input end of the first voltage stabilizing module is electrically connected to the second end of the anti-ground drift unit. The output end of the first voltage stabilizing module is used to output the voltage signal.

4. The vehicle ECU wake-up circuit according to claim 3, characterized in that: The ECU voltage generating unit further includes: a first diode, wherein an anode of the first diode is electrically connected to the second end of the anti-ground drift unit, and a cathode of the first diode is electrically connected to an input of the first voltage stabilizing module; A second diode, wherein an anode of the second diode is used to input a second wake-up trigger signal, and a cathode of the second diode is electrically connected to an input of the first voltage stabilizing module.

5. The vehicle ECU wake-up circuit according to claim 4, characterized in that: The ECU voltage generating unit further includes: A first voltage divider module has a first end and a second end, wherein the first end of the first voltage divider module is used to input a power-on self-locking signal of the MCU; A third diode, wherein an anode of the third diode is electrically connected to the second end of the first voltage divider module, and a cathode of the third diode is electrically connected to the input of the first voltage stabilizing module.

6. The vehicle ECU wake-up circuit according to claim 1, characterized in that: The pulse voltage generating module includes: a second voltage dividing module, a first resistance module, a first capacitor module and a first field effect transistor, wherein the first end of the second voltage dividing module and the first end of the first resistance module are electrically connected to the second end of the anti-ground drift unit respectively, the second end of the second voltage dividing module is electrically connected to the drain of the first field effect transistor, the drain of the first field effect transistor is electrically connected to the input end of the second voltage stabilizing module, the second end of the first resistance module and the first end of the first capacitor module are electrically connected to the gate of the first field effect transistor respectively, and the second end of the first capacitor module and the source of the first field effect transistor are grounded.

7. The vehicle ECU wake-up circuit according to claim 6, characterized in that: The pulse voltage generating module further includes a second resistance module, a first end of the second resistance module is electrically connected to a second end of the first resistance module, and a second end of the second resistance module is grounded.

8. The vehicle ECU wake-up circuit according to claim 1, characterized in that: The second voltage stabilizing module includes: a third resistor module, a fourth resistor module, a fifth resistor module, a transistor and a second field effect transistor. The first end of the third resistor module and the base of the transistor are respectively electrically connected to the output end of the pulse voltage generating module, the second end of the third resistor module and the emitter of the transistor are grounded, the collector of the transistor is electrically connected to the first end of the fourth resistor module, the second end of the fourth resistor module is respectively electrically connected to the first end of the fifth resistor module and the gate of the second field effect transistor, the second end of the fifth resistor module and the source of the second field effect transistor are respectively electrically connected to the power supply end, and the drain of the second field effect transistor is used to output the voltage signal.

9. The vehicle ECU wake-up circuit according to claim 8, characterized in that: The second voltage stabilizing module further includes: a second capacitor module, a first end of the second capacitor module is electrically connected to the drain of the second field effect transistor, and a second end of the second capacitor module is grounded.

10. The vehicle ECU wake-up circuit according to any one of claims 1 to 9, characterized in that: The electrostatic protection unit comprises: The TVS diode has a first end and a second end. The first end of the TVS diode is used to input the first wake-up trigger signal, and the second end of the TVS diode is grounded.

11. The vehicle ECU wake-up circuit according to any one of claims 1 to 9, characterized in that: The electrostatic protection unit comprises: The ESD capacitor has a first end and a second end. The first end of the ESD capacitor is used to input the first wake-up trigger signal, and the second end of the ESD capacitor is grounded.

12. An electronic device, characterized in that: include: The vehicle ECU wake-up circuit according to any one of claims 1 to 11; The vehicle ECU is electrically connected to the vehicle ECU wake-up circuit.

13. The electronic device according to claim 12, characterized in that: The vehicle ECU comprises: MCU; A power chip has a first end and a second end, the first end of the power chip is electrically connected to the vehicle ECU wake-up circuit, and the second end of the power chip is electrically connected to the MCU.

14. A vehicle, characterized in that: include: The vehicle ECU wake-up circuit according to any one of claims 1 to 11; a vehicle ECU, electrically connected to the vehicle ECU wake-up circuit; The vehicle body has a accommodating cavity, and the vehicle ECU wake-up circuit and the vehicle ECU are installed in the accommodating cavity.

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