CN221678663U - Dormancy awakening circuit of vehicle-mounted electronic product - Google Patents

Abstract

The utility model discloses a dormancy wakeup circuit of a vehicle-mounted electronic product, belonging to the technical field of dormancy wakeup modes of electronic products; the device comprises a plurality of signal input branches, wherein each signal input branch comprises a diode, and the anode of the diode is connected with an external input signal; the base electrode of the triode is connected with the output end of the signal input branch, the emitter electrode of the triode is connected with the grounding end, the collector electrode of the triode is connected with a first reference node, and the first reference node is connected with a power supply voltage end; the grid electrode of the field effect tube is connected with the first reference node, and the source electrode of the field effect tube is connected with the second reference node; and the wake-up terminal pin of the power management chip is connected with the drain electrode of the field effect transistor and is also connected with the power voltage terminal. The beneficial effects of the technical scheme are as follows: the working state of the vehicle-mounted electronic product is adjusted according to the actual working condition, so that the power consumption is reduced, the loss of the storage battery is relieved, and the key components of the whole vehicle are protected.

Description

A sleep wake-up circuit for vehicle-mounted electronic products

Technical Field

The utility model relates to the technical field of sleep and wake-up modes for electronic products, in particular to a sleep and wake-up circuit for vehicle-mounted electronic products.

Background Art

In the existing general technology, a single wake-up method is generally used: for example, using KL30/KL31 for power supply, outputting a normally high level to the wake-up circuit module through the external wiring harness KL15, thereby powering and driving the entire product, and then the product works normally. When the wiring harness KL15 outputs a low level, the entire product is in a sleep state.

Conventional on-board radar circuit designs can only implement a single or a single sleep and wake-up mode. The on-board radar is connected to the on-board battery. Although the overall power consumption is not high, it cannot be ignored. In some special cases, the on-board radar needs to work independently for a long time without any human interference, such as the vital signs detection millimeter-wave radar, which will still cause damage to the battery. If it cannot sleep and wake up according to its actual situation during work, it will cause damage to the key components of the car.

Utility Model Content

The purpose of the utility model is to provide a sleep wake-up circuit for vehicle-mounted electronic products to solve the above technical problems;

A sleep wake-up circuit for an in-vehicle electronic product, comprising:

A plurality of signal input branches, each of which comprises a diode, the anode of which is connected in series with a resistor and then connected to an external input signal;

a transistor, wherein the base of the transistor is connected to the output end of the signal input branch, the emitter of the transistor is connected to the ground end, the collector of the transistor is connected to the first reference node via a third resistor, and the first reference node is connected to the power supply voltage end via a first resistor;

A field effect transistor, wherein a gate of the field effect transistor is connected to the first reference node, and a source of the field effect transistor is connected to a second reference node;

A power management chip, wherein the wake-up end pin of the power management chip is connected to the drain of the field effect transistor, and the power management chip is also connected to the power supply voltage end.

Preferably, the external input signal includes:

A first hardware wake-up signal, wherein the first hardware wake-up signal is connected to the ground terminal through an eighth resistor;

A second sleep delay wake-up signal, wherein the second sleep delay wake-up signal is connected to the ground terminal through a ninth resistor;

a third CAN bus wake-up signal, wherein the third CAN bus wake-up signal is connected to the ground terminal through a tenth resistor;

A fourth Ethernet wake-up signal, wherein the fourth Ethernet wake-up signal is connected to the ground end through an eleventh resistor.

Preferably, the first hardware wake-up signal is connected to the anode of the first diode through a second resistor;

The second sleep delay wake-up signal is connected to the anode of the second diode through a fourth resistor;

The third CAN bus wake-up signal is connected to the anode of the third diode through a fifth resistor;

The fourth Ethernet wake-up signal is connected to the anode of the fourth diode through the sixth resistor.

Preferably, the output end of the signal input branch is connected to the ground end via a seventh resistor.

Preferably, it further comprises a first voltage regulator tube, wherein an anode of the first voltage regulator tube is connected to the first reference node, and a cathode of the first voltage regulator tube is connected to the second reference node.

Preferably, it further comprises a second voltage regulator tube, wherein the anode of the second voltage regulator tube is connected to the drain of the field effect tube, and the cathode of the second voltage regulator tube is connected to the source of the field effect tube.

Preferably, it also includes:

A plurality of radio frequency processing chips connected to the output end of the power management chip;

The microprocessor chip is connected to the output end of the power management chip.

Preferably, it also includes:

A first wiring harness for outputting a first hardware wake-up signal, connected to an input end of the power management chip;

A CAN chip for outputting a third CAN bus wake-up signal is connected to an input end of the power management chip.

Preferably, it also includes:

An Ethernet chip for outputting a fourth Ethernet wake-up signal, connected to an input end of the power management chip;

A sleep delay chip for outputting a second sleep delay wake-up signal is connected to the input end of the power management chip.

Preferably, the vehicle-mounted electronic product is a vehicle-mounted radar.

The beneficial effect of the utility model is that: by adopting the above technical scheme, a sleep wake-up circuit for vehicle-mounted electronic products is provided, the working state of the vehicle-mounted electronic products is adjusted according to actual working conditions, power consumption is reduced, battery loss is alleviated, and key components of the entire vehicle are protected.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a circuit diagram of a sleep-wake-up circuit of an on-vehicle electronic product of the present invention;

FIG. 2 is a connection block diagram of the power management chip of the present utility model.

In the attached drawings: 101, first wiring harness; 102, CAN chip; 103, Ethernet chip; 104, sleep delay chip; 105, MCU processing chip; 106, RF processing chip.

DETAILED DESCRIPTION

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.

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

A sleep wake-up circuit for an in-vehicle electronic product, as shown in FIG1 and FIG2, includes:

Multiple signal input branches, each signal input branch includes a diode, the anode of the diode is connected in series with a resistor and then connected to an external input signal;

a transistor Q2, wherein the base of the transistor Q2 is connected to the output end of the signal input branch, the emitter of the transistor Q2 is connected to the ground terminal GND, the collector of the transistor Q2 is connected to the first reference node X1 through the third resistor R3, and the first reference node X1 is connected to the power supply voltage terminal KL30 through the first resistor R1;

A field effect transistor Q1, wherein the gate of the field effect transistor Q1 is connected to the first reference node X1, and the source of the field effect transistor Q1 is connected to the second reference node X2;

A power management chip PMIC, a wake-up pin WAKE of the power management chip PMIC is connected to the drain of the field effect transistor Q1, and the power management chip PMIC is also connected to the power voltage terminal KL30.

Specifically, the utility model provides a sleep and wake-up circuit for vehicle-mounted electronic products, which is mainly used in the technical field of sleep and wake-up methods. It includes adding multiple wake-up methods on the basis of compatible hardware wake-up, adjusting the working state of the vehicle-mounted electronic products according to actual working conditions, greatly reducing power consumption, alleviating battery loss, and protecting key components of the entire vehicle.

In a preferred embodiment, the external input signal includes:

A first hardware wake-up signal KL15, the first hardware wake-up signal KL15 is connected to the ground terminal GND through an eighth resistor R8;

A second sleep delay wake-up signal HOLD_ON, wherein the second sleep delay wake-up signal HOLD_ON is connected to the ground terminal GND through a ninth resistor R9;

a third CAN bus wake-up signal CAN, the third CAN bus wake-up signal CAN is connected to the ground terminal GND through a tenth resistor R10;

The fourth Ethernet wake-up signal ETHERNET is connected to the ground terminal GND through the eleventh resistor R11.

Specifically, the pull-down resistor provides a stable low voltage to ensure that when there is no external control signal, the transistor Q2 is reliably cut off, the field effect transistor Q1 is turned off, and the entire vehicle-mounted electronic product is in a stable sleep state.

More specifically, the following functions are included:

CAN sleep wake-up,

CAN sleep: when there is no CAN signal, the device and internal circuit are turned off to reduce power consumption. If the vehicle-mounted electronic product does not detect any CAN message on the bus, it will enter the sleep state, so the power consumption is significantly reduced, greatly increasing the battery life;

CAN wake-up: When the CAN signal is activated, the vehicle electronics can be woken up from sleep mode. Once the vehicle is powered on and CAN activity resumes, the vehicle electronics start working immediately.

Ethernet sleep wakeup,

Ethernet sleep, when there is no Ethernet signal, the device and internal circuit are turned off to reduce power consumption. If the vehicle electronic product does not detect any Ethernet message on the bus, it will enter the sleep state, so the power consumption is significantly reduced, greatly increasing the battery life;

Wake-on-Ethernet, which can wake up vehicle electronics from sleep mode when the Ethernet signal is activated, and start working immediately once the vehicle is powered on and Ethernet activity resumes;

Hardware sleep wakeup,

Hardware sleep: when the hardware KL15 level is detected to be low, the product keeps working for a while and then enters sleep mode;

Hardware wake-up: when the hardware KL15 level is detected to be normally high, and there is CAN/Ethernet activity in the vehicle electronic products, the vehicle electronic products start working immediately;

Delayed sleep: To ensure that the vehicle-mounted electronic products save or send important data before sleeping, the sleep command will be kept for a period of time before entering sleep mode.

In a preferred embodiment, the first hardware wake-up signal KL15 is connected to the anode of the first diode D1 through the second resistor R2;

The second sleep delay wake-up signal HOLD_ON is connected to the anode of the second diode D2 through the fourth resistor R4;

The third CAN bus wake-up signal CAN is connected to the anode of the third diode D3 through the fifth resistor R5;

The fourth Ethernet wake-up signal ETHERNET is connected to the anode of the fourth diode D4 through the sixth resistor R6.

Specifically, while being compatible with the commonly used KL15 wake-up, CAN wake-up and Ethernet wake-up are added to adjust the working status of vehicle-mounted electronic products according to actual working conditions, greatly reducing power consumption, alleviating battery loss, and protecting key components of the entire vehicle.

To be more specific, delay processing ensures normal data processing before entering sleep mode, CAN wake-up confirms whether to wake up by detecting the message on the CAN bus, Ethernet wake-up confirms whether to wake up by detecting the message on the Ethernet bus, and the power management chip PMIC provides the operating voltage for the entire vehicle electronic products.

To be more specific, multiple diodes form a logic gate circuit (or gate). As long as there is an external control signal, the transistor Q2 will be controlled to be turned on, and the field effect transistor Q1 will be turned on, thereby outputting a wake signal to control the PMIC chip to enter a normal working state, wherein the transistor Q2 is used as a switch tube to increase the output current and control the field effect transistor Q1 to be turned on; the field effect transistor Q1 is used as a switch tube, and after being turned on, it provides a high voltage to the WAKE pin of the PMIC to wake up the PMIC to enter a working state; the on-board battery supplies power to the on-board electronic products through the second wiring harness KL30.

In a preferred embodiment, the output end of the signal input branch is connected to the ground end GND via a seventh resistor R7.

In a preferred embodiment, it further includes a first voltage regulator tube U1, wherein the anode of the first voltage regulator tube U1 is connected to the first reference node X1, and the cathode of the first voltage regulator tube U1 is connected to the second reference node X2.

Specifically, the first voltage-stabilizing tube U1 is used to protect the device, to protect the field effect tube Q1 to work normally, and to ensure that the VGS voltage does not exceed the rated voltage value.

In a preferred embodiment, a second voltage regulator tube U2 is further included, wherein the anode of the second voltage regulator tube U2 is connected to the drain of the field effect tube Q1 , and the cathode of the second voltage regulator tube U2 is connected to the source of the field effect tube Q1 .

In a preferred embodiment, it also includes:

A plurality of radio frequency processing chips 106 connected to the output end of the power management chip PMIC;

The microprocessor chip 105 is connected to the output end of the power management chip PMIC.

In a preferred embodiment, it also includes:

A first wiring harness 101 for outputting a first hardware wake-up signal KL15, connected to an input end of a power management chip PMIC;

The CAN chip 102 for outputting the third CAN bus wake-up signal CAN is connected to the input end of the power management chip PMIC.

In a preferred embodiment, it also includes:

The Ethernet chip 103 is used to output a fourth Ethernet wake-up signal ETHERNET, and is connected to the input end of the power management chip PMIC;

The sleep delay chip 104 for outputting the second sleep delay wake-up signal HOLD_ON is connected to the input end of the power management chip PMIC.

In a preferred embodiment, the vehicle-mounted electronic product is a vehicle-mounted radar.

In summary, the utility model provides a sleep wake-up circuit for vehicle-mounted electronic products, which is applied to the technical field of sleep wake-up methods. While being compatible with the commonly used KL15 wake-up, it adds CAN wake-up/Ethernet wake-up, and adjusts the working state of the vehicle-mounted radar according to the actual working conditions, which greatly reduces power consumption, alleviates battery loss, and protects key components of the entire vehicle.

The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dormancy awakening circuit of a vehicle-mounted electronic product is characterized by comprising,

Each signal input branch comprises a diode, and the anodes of the diodes are connected with an external input signal after being connected with a resistor in series;

The base electrode of the triode (Q2) is connected with the output end of the signal input branch, the emitter electrode of the triode (Q2) is connected with the ground end (GND), the collector electrode of the triode (Q2) is connected with a first reference node (X1) through a third resistor (R3), and the first reference node (X1) is connected with a power supply voltage end (KL 30) through the first resistor (R1);

The grid electrode of the field effect tube (Q1) is connected with the first reference node (X1), and the source electrode of the field effect tube (Q1) is connected with the second reference node (X2);

The WAKE-up terminal pin (WAKE) of the power management chip (PMIC) is connected with the drain electrode of the field effect transistor (Q1), and the power management chip (PMIC) is also connected with the power voltage terminal (KL 30).

2. The sleep wake-up circuit of claim 1, wherein said external input signal comprises,

A first hardware wake-up signal (KL 15), the first hardware wake-up signal (KL 15) being connected to the Ground (GND) through an eighth resistor (R8);

A second sleep delay wake-up signal (hold_on), said second sleep delay wake-up signal (hold_on) being connected to said Ground (GND) through a ninth resistor (R9);

A third CAN-bus wake-up signal (CAN) connected to the Ground (GND) via a tenth resistor (R10);

-a fourth ETHERNET wake-up signal (ETHERNET) connected to the Ground (GND) via an eleventh resistor (R11).

3. The sleep wake-up circuit of a vehicle-mounted electronic product according to claim 2, characterized in that the first hardware wake-up signal (KL 15) is connected to the anode of a first diode (D1) through a second resistor (R2);

The second sleep delay wake-up signal (hold_on) is connected with the anode of the second diode (D2) through a fourth resistor (R4);

The third CAN bus wake-up signal (CAN) is connected with the anode of the third diode (D3) through a fifth resistor (R5);

the fourth Ethernet wake-up signal (ETHERNET) is connected with the anode of the fourth diode (D4) through a sixth resistor (R6).

4. The sleep-wake-up circuit of an on-vehicle electronic product according to claim 1, wherein the output terminal of the signal input branch is connected to the ground terminal (GND) through a seventh resistor (R7).

5. The sleep-wake-up circuit of an on-board electronic product according to claim 1, further comprising a first voltage regulator tube (U1), wherein an anode of the first voltage regulator tube (U1) is connected to the first reference node (X1), and wherein a cathode of the first voltage regulator tube (U1) is connected to the second reference node (X2).

6. The sleep-wake-up circuit of an on-vehicle electronic product according to claim 5, further comprising a second voltage regulator tube (U2), wherein an anode of the second voltage regulator tube (U2) is connected to a drain of the field-effect tube (Q1), and a cathode of the second voltage regulator tube (U2) is connected to a source of the field-effect tube (Q1).

7. The sleep wake-up circuit of claim 6, further comprising,

A plurality of radio frequency processing chips (106) connected to the output terminals of the power management chip (PMIC);

And a microprocessor chip (105) connected to the output of the power management chip (PMIC).

8. The sleep wake-up circuit of claim 7, further comprising,

A first harness (101) for outputting a first hardware wake-up signal (KL 15) connected to an input of the power management chip (PMIC);

And the CAN chip (102) is used for outputting a third CAN bus wake-up signal (CAN) and is connected with the input end of the power management chip (PMIC).

9. The sleep wake-up circuit of claim 8, further comprising,

An ETHERNET chip (103) for outputting a fourth ETHERNET wake-up signal (ETHERNET), connected to an input of the power management chip (PMIC);

And the sleep delay chip (104) is used for outputting a second sleep delay wake-up signal (HOLD_ON) and is connected with the input end of the power management chip (PMIC).

10. The sleep wake-up circuit of an in-vehicle electronic product according to claim 1, wherein the in-vehicle electronic product is an in-vehicle radar.