Intelligent electronic switch, integrated circuit chip, chip product and automobile

Abstract

The invention provides an intelligent electronic switch, an integrated circuit chip, a chip product and an automobile, and the intelligent electronic switch comprises a power supply end, a power grounding end, a load output end, a control circuit and a switching circuit, and also comprises a first function end and a second function end, and the first function end and the second function end are connected with the control circuit; when the first function end receives a first signal and the second function end receives a second signal, the control circuit controls the intelligent electronic switch to enter a bypass mode, and the first function end and the second function end comprise any two of an input end, a diagnosis enabling end, a function selection end and a diagnosis relieving end. In the scheme, the intelligent electronic switch multiplexes the original terminal to enter the bypass mode, the peripheral application does not need to be changed, the cost is low, and the self power consumption of the intelligent electronic switch can be reduced on the premise of providing a load current path to the outside, so that the overall power consumption of equipment where the intelligent electronic switch is located is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent semiconductor switches, and in particular to an intelligent electronic switch, an integrated circuit chip, a chip product and an automobile. Background Art

[0002] Smart electronic switches are usually used to couple loads with batteries. They are electronic components that control the on / off of load lines. They are widely used in automotive electronics, industrial automation, medical equipment, and other fields. Due to the diverse types of loads they connect to and the harsh working environment, the application end has high requirements for the reliability of smart electronic switches. Therefore, smart electronic switches are integrated with a variety of protection functions and diagnostic functions to improve their reliability.

[0003] Normally, when an intelligent electronic switch is in normal working mode, its own power consumption is usually relatively large. There are usually many similar intelligent electronic switches in a vehicle, which will lead to high power consumption of the entire vehicle. To address this problem, the intelligent electronic switch proposed in the relevant design can work in two modes with different power consumption to provide current to the load, but how to switch the working mode of the intelligent electronic switch is an urgent problem to be solved. Summary of the invention

[0004] The present application provides an intelligent electronic switch, an integrated circuit chip, a chip product and an automobile, so as to solve the problem of high power of the intelligent electronic switch.

[0005] A first aspect of the present application provides an intelligent electronic switch, comprising a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit;

[0006] The power supply terminal and the power ground terminal are used to connect to a battery, and the load output terminal is used to connect to a load; the switch circuit has a first end connected to the power supply terminal or the power ground terminal, a second end connected to the load output terminal, and a control end connected to the control circuit, and the control circuit is used to control whether the switch circuit is turned on or not;

[0007] The intelligent electronic switch further includes a first functional terminal and a second functional terminal, both of which are connected to the control circuit; when the first functional terminal receives a first signal and the second functional terminal receives a second signal, the control circuit controls the intelligent electronic switch to enter a bypass mode, and the first functional terminal and the second functional terminal include any two of an input terminal, a diagnosis enabling terminal, a function selecting terminal, and a diagnosis releasing terminal;

[0008] The self-consumption of the intelligent electronic switch in the bypass mode is less than that in the normal working mode. The switch circuit is in an on-state in both the bypass mode and the normal working mode.

[0009] Optionally, the control circuit is also used to connect to a microcontroller;

[0010] After the intelligent electronic switch enters the bypass mode, the control circuit is further configured to output a bypass mode entry signal to the microcontroller.

[0011] Optionally, when the first functional end receives the first signal, if the second functional end receives the second signal, the control circuit controls the intelligent electronic switch to enter a bypass mode.

[0012] As an example, the first signal includes a first level signal and a second level signal that appear alternately; the second signal includes a first level signal;

[0013] The control circuit includes a first timing unit, a second timing unit, a third timing unit, a fourth timing unit, a first counting unit and a logic control unit;

[0014] The first timing unit and the fourth timing unit are both connected to the first functional end, the fourth timing unit is also connected to the first counting unit, the first counting unit and the first timing unit are also connected to the logic control unit, the logic control unit is also connected to the second timing unit and the third timing unit, and the second timing unit is also connected to the second functional end;

[0015] The first timing unit is in a non-timing state and starts timing when the first functional end receives a first edge signal, and outputs a first timing arrival signal when the continuous timing duration reaches a first duration threshold;

[0016] The fourth timing unit is in a non-timing state and starts timing when the first functional end receives a first edge signal, and stops timing when the first functional end receives a second edge signal. The fourth timing unit outputs a counting trigger signal when the continuous timing duration is greater than or equal to the first preset duration and less than or equal to the second preset duration, otherwise outputs a counting clearing signal. The first counting unit performs cumulative counting when receiving the counting trigger signal, outputs a counting arrival signal when the accumulated counting value reaches the first counting threshold, and performs counting clearing when receiving the counting clearing signal;

[0017] If the logic control unit does not receive the first timing arrival signal before receiving the count arrival signal, an enable signal is output, the third timing unit is in a non-timing state and starts timing when the enable signal is received, and outputs a second timing arrival signal when the continuous timing duration reaches a second duration threshold, the second timing unit starts working when receiving the enable signal and continuously times the first level signal received by the second functional terminal, and the second timing unit outputs a third timing arrival signal when the continuous timing duration is greater than or equal to a third preset duration;

[0018] If the logic control unit receives the third timing arrival signal before receiving the second timing arrival signal, the intelligent electronic switch is controlled to enter the bypass mode.

[0019] As another example, the control circuit further includes a fifth timing unit, and the fifth timing unit is connected to the first counting unit and the first functional end respectively;

[0020] The first counting unit outputs a count signal to the fifth timing unit after cumulative counting. The fifth timing unit is in a non-timing state and starts timing when it receives the count signal, and outputs a count lock signal to the first counting unit to lock the count of the first counting unit. The fifth timing unit stops timing when the first functional end receives a first edge signal. If the fifth timing unit continues timing for a duration greater than or equal to a fourth preset duration and less than or equal to a fifth preset duration, it outputs a count unlock signal, otherwise it outputs the count reset signal. The first counting unit releases the count lock of the first counting unit after receiving the count unlock signal.

[0021] Optionally, when the intelligent electronic switch is in the bypass mode, if the first functional end receives a third signal, the control circuit controls the intelligent electronic switch to exit the bypass mode.

[0022] Optionally, the switch circuit includes a main power switch and a bypass switch;

[0023] The first end of the main power switch and the first end of the bypass switch are both connected to a power supply end or a power ground end, the second end of the main power switch and the second end of the bypass switch are both connected to a load output end, and the control end of the main power switch and the control end of the bypass switch are both connected to the control circuit;

[0024] When the intelligent electronic switch is in a normal working mode, the control circuit controls the main power switch to be turned on and the bypass switch to be turned off. When the intelligent electronic switch enters a bypass mode, the control circuit controls the bypass switch to be turned on and the main power switch to be turned off. The power consumption of the control circuit when controlling the intelligent electronic switch to work in the normal working mode is greater than the power consumption when controlling the intelligent electronic switch to work in the bypass mode.

[0025] Optionally, the switching circuit includes a power switch, the control circuit includes a logic control unit, a first drive unit and a current limiting drive unit, the first end of the power switch is connected to a power supply end or a power ground end, the second end of the power switch is connected to a load output end, the control end of the power switch is connected to the first drive unit and the current limiting drive unit, the first drive unit and the current limiting drive unit are also connected to the logic control unit, and the logic control unit is used to control the enable state of the first drive unit and the current limiting drive unit;

[0026] When the intelligent electronic switch works in a normal working mode, the logic control unit drives the power switch to turn on via the first driving unit; when the intelligent electronic switch works in a bypass mode, the logic control unit drives the power switch to turn on via the current limiting driving unit.

[0027] The second aspect of the present application provides an integrated circuit chip, comprising the intelligent electronic switch as described in the first aspect, wherein the power supply end is a power supply pin, the power ground end is a power ground pin, the load output end is a load output pin, the first function end is a first function pin, and the second function end is a second function pin.

[0028] A third aspect of the present application provides a chip product, comprising the intelligent electronic switch according to the first aspect, wherein the components of the intelligent electronic switch other than the switch circuit or some components of the switch circuit are located on a first integrated circuit chip, and correspondingly, the switch circuit or some components of the switch circuit are located on a second integrated circuit chip;

[0029] Among them, the power supply end is a power supply pin, the power ground end is a power ground pin, the load output end is a load output pin, the first function end is a first function pin, and the second function end is a second function pin. The power supply pin, the power ground pin, the first function pin and the second function pin are located on a first integrated circuit chip, and the load output pin is located on a second integrated circuit chip.

[0030] A third aspect of the present application provides an automobile, comprising the intelligent electronic switch as described in the first aspect, or the integrated circuit chip as described in the second aspect, or the chip product as described in the third aspect;

[0031] It also includes a battery, a load and a microcontroller; wherein the positive electrode of the battery is connected to the power supply terminal, the negative electrode of the battery is connected to the power ground terminal, one end of the load is connected to the load output terminal, the other end of the load is connected to the power ground terminal or the power supply terminal, and the microcontroller is connected to the intelligent electronic switch.

[0032] The intelligent electronic switch, integrated circuit chip, chip product and automobile provided by the present application, in addition to having a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit, also include a first functional terminal and a second functional terminal, and the first functional terminal and the second functional terminal are both connected to the control circuit; when the first functional terminal receives a first signal and the second functional terminal receives a second signal, the control circuit controls the intelligent electronic switch to enter the bypass mode, and the first functional terminal and the second functional terminal include any two of the input terminal, the diagnostic enable terminal, the function selection terminal, and the diagnostic release terminal. In this scheme, the switch circuit is in an on-state in both the bypass mode and the normal working mode, but the self-consumption of the intelligent electronic switch in the bypass mode is less than the self-consumption of the intelligent electronic switch in the normal working mode, and the intelligent electronic switch reuses the original terminal to enter the bypass mode, does not need to change its peripheral structure, has low cost, can reduce the self-consumption of the intelligent electronic switch on the premise of providing a load current path to the outside, thereby reducing the overall power consumption of the device where the intelligent electronic switch is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 This is a schematic diagram of a circuit module of an electronic device provided in the first embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of a circuit module of an electronic device provided in the second embodiment of the present application;

[0036] Figure 3A It is a structural composition diagram of the control circuit in the intelligent electronic switch;

[0037] Figure 3B yes Figure 3A The schematic diagram of the working principle of the control circuit shown;

[0038] Figure 3CIt is another structural composition diagram of the control circuit in the intelligent electronic switch;

[0039] Figure 3D yes Figure 3C The schematic diagram of the working principle of the control circuit shown;

[0040] Figure 4 This is a schematic diagram of a circuit module of an electronic device provided in the third embodiment of the present application;

[0041] Figure 5 is a schematic diagram of a circuit module of an electronic device provided in a fourth embodiment of the present application;

[0042] Figure 6 This is a schematic diagram of a circuit structure of an electronic device provided in the fifth embodiment of the present application.

[0043] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The terms "including" and "having" and any variations thereof appearing in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or modules is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0046] In addition, the terms "first", "second" and "third" are used to distinguish different objects, rather than to describe a specific order. The electrical connection of the present application includes direct electrical connection and indirect electrical connection. Indirect electrical connection means that other electronic components, pins, etc. may exist between the two electrically connected components. The XX end mentioned in the present application may be an actual terminal, or it may not be an actual terminal, for example, it is only one end of a component or one end of a wire. The "and / or" mentioned in the present application includes three situations. For example, A and / or B includes three situations: A, B, A and B.

[0047] With the development of semiconductor technology, relays used to turn on or off load paths are gradually replaced by intelligent electronic switches, which can couple the load with the battery and have one or more diagnostic capabilities and protection features. For example, when the intelligent electronic switch is overheated, overloaded or short-circuited, the power switch inside the intelligent electronic switch will be turned off, so that the path between the battery and the load is disconnected, thereby improving the reliability of the intelligent electronic switch.

[0048] In practical applications, the load types of intelligent electronic switches are various (for example, inductance, capacitance, resistance or a combination of the three) and the working environment is harsh. This means that when the intelligent electronic switch has load current output, its functional circuits such as diagnostic function and protection function are all in an enabled state, which makes the power consumption of the intelligent electronic switch relatively large. Especially when there are many similar intelligent electronic switches in an electronic device, the overall power consumption of the electronic device will be relatively large, which will accelerate the consumption of the battery equipped in the electronic device and cause the battery life to be significantly shortened.

[0049] In response to this problem, the inventor of this application has found through long-term research that in the field of automotive electronics, when a vehicle is in parking mode, some loads of the vehicle will stop working. At this time, the load current flowing through the intelligent electronic switch becomes significantly smaller. Therefore, the intelligent electronic switch can be controlled to enter the bypass mode to reduce the self-consumption of the intelligent electronic switch. When to control the intelligent electronic switch to switch the working mode is an important issue. In this embodiment of the application, an intelligent electronic switch is proposed, which can change the working mode by reusing the original terminal to receive external signals. On the basis of not changing the peripheral application, it can provide a current conduction path for the load in two working modes with different power consumption, which can not only meet the load current demand, but also achieve the purpose of reducing power consumption. It is low cost and has low requirements for users and peripheral manufacturers.

[0050] Exemplarily, the intelligent electronic switch provided in the embodiment of the present application, in addition to having a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit, also includes a first functional terminal and a second functional terminal, and the first functional terminal and the second functional terminal are both connected to the control circuit; when the first functional terminal receives a first signal and the second functional terminal receives a second signal, the control circuit controls the intelligent electronic switch to enter the bypass mode. In this embodiment, the switch circuit is in an on-state in both the bypass mode and the normal working mode, but the self-consumption of the intelligent electronic switch in the bypass mode is less than the self-consumption of the intelligent electronic switch in the normal working mode, that is, under the premise that the intelligent electronic switch provides a load current, by controlling the intelligent electronic switch to enter the bypass mode, the self-consumption of the intelligent electronic switch is effectively reduced without changing the peripheral application, and the battery life of the device where the intelligent electronic switch is located is extended, and the cost is low.

[0051] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0052] Figure 1 Schematic diagram of a circuit module of an electronic device provided in the first embodiment of the present application. Figure 1 As shown, in this embodiment, the electronic device may include an intelligent electronic switch 20, a battery 10, a load 30 and a microcontroller 40. The intelligent electronic switch 20 may include a power supply terminal VBAT, a power ground terminal GND, a load output terminal OUT, a control circuit 21 and a switch circuit 22. The power supply terminal VBAT and the power ground terminal GND are used to connect to the battery 10, and the load output terminal OUT is used to connect to the load 30. Specifically, the power supply terminal VBAT is connected to the positive electrode of the battery 10, and the power ground terminal GND is connected to the negative electrode of the battery 10.

[0053] Optionally, the switch circuit 22 has a first end connected to the power supply terminal VBAT or the power ground terminal GND, a second end connected to the load output terminal OUT, and a control end connected to the control circuit 21, and the control circuit 21 is used to control whether the switch circuit 22 is turned on. In a possible design, Figure 1As shown, the first end of the switch circuit 22 is connected to the power supply terminal VBAT, and the second end thereof is connected to the load output terminal OUT. At this time, the switch circuit 22 is connected as a high-side switch circuit, which is a switch circuit connected between the power supply terminal VBAT and the load 30. In other possible designs of the present application, the first end of the switch circuit 22 is connected to the power ground terminal GND, and the second end thereof is connected to the load output terminal OUT. At this time, the switch circuit 22 is connected as a low-side switch circuit, which is a switch circuit connected between the power ground terminal GND and the load 30.

[0054] For example, continue to refer to Figure 1 As shown, the intelligent electronic switch 20 further includes a first functional terminal FU1 and a second functional terminal FU2, and the first functional terminal FU1 and the second functional terminal FU2 are both connected to the control circuit 21; when the first functional terminal FU1 receives a first signal and the second functional terminal FU2 receives a second signal, the control circuit 21 controls the intelligent electronic switch 20 to enter the bypass mode; wherein, the self-consumption power of the intelligent electronic switch 20 in the bypass mode is less than the self-consumption power of the intelligent electronic switch 20 in the normal working mode, and the switch circuit 22 is in the on state in both the bypass mode and the normal working mode.

[0055] In practical applications, the intelligent electronic switch 20 includes a control circuit 21 and a switch circuit 22. Therefore, the control circuit 21 can control the switch circuit 22 to work in different states according to an external signal, so that the intelligent electronic switch 20 works in different modes. For example, the intelligent electronic switch 20 can control the switch circuit 22 to turn on when receiving an on control signal, and control the switch circuit 22 to turn off when receiving an off control signal. Moreover, based on the switch state of the switch circuit 22 and the working state of the functional circuits such as the diagnosis and protection inside the intelligent electronic switch 20, the working mode of the intelligent electronic switch 20 can be divided into a normal working mode, a bypass mode, a standby mode, and a sleep mode. Among them, when the switch circuit 22 is in the on state and the functional circuits such as the protection and diagnosis inside the intelligent electronic switch 20 are working normally, at this time, the intelligent electronic switch 20 is said to work in a normal working mode or an active mode (Active mode). eMode), usually, in the normal working mode, the intelligent electronic switch 20 can provide a large load current according to the requirements of the load 30. When the switch circuit 22 is in the on state but the protection and diagnosis function circuits integrated in the intelligent electronic switch 20 are not working or partially not working, the intelligent electronic switch 20 is said to be working in the bypass mode. Since the power consumed by the intelligent electronic switch 20 in the bypass mode is relatively low, the bypass mode can also be called a low power mode. In the bypass mode, the load current provided by the intelligent electronic switch 20 is less than the load current provided when it is in the normal working mode. When the switch circuit 22 is in the off state but the protection and diagnosis function circuits in the intelligent electronic switch 20 are in the normal working state, the intelligent electronic switch 20 is said to be working in the standby mode. That is, at this time, the intelligent electronic switch 20 has no load current output, but is in the standby state. Once the start control signal is received, it can be directly converted to the normal working mode. When the switch circuit 22 is in the off state and the protection and diagnosis function circuits in the intelligent electronic switch 20 are not working, the intelligent electronic switch 20 is said to be working in the dormant mode or sleep mode (Sleep mode). At this time, the power consumption of the intelligent electronic switch 20 is the lowest.

[0056] It can be understood that the embodiments of the present application are mainly explained by the application scenario that the switch circuit 22 is in the on state, and therefore, the intelligent electronic switch 20 works in the normal working mode or the bypass mode. The difference between the intelligent electronic switch 20 working in the bypass mode and the normal working mode is mainly reflected in the different self-consumption of the intelligent electronic switch 20 in the two modes, which is mainly reflected in the different working modules or working states of the modules in the intelligent electronic switch 20, so that the power consumption of the functional modules in the intelligent electronic switch 20 is different, thereby realizing the different self-consumption of the intelligent electronic switch 20.

[0057] Optionally, in an embodiment of the present application, the intelligent electronic switch 20 may include multiple functional terminals, for example, a power supply terminal VBAT, a power ground terminal GND, an input terminal Input, a load output terminal OUT, a diagnostic enable terminal SEN, a first function selection terminal SEL0, a second function selection terminal SEL1, a diagnostic output terminal CS, a diagnostic release terminal Fault, etc.

[0058] Among them, the power supply terminal VBAT and the power ground terminal GND are used to connect with the battery 10, and use the power of the battery 10 to power the intelligent electronic switch 20. The input terminal Input is used to receive a switch control signal for the switch circuit 22. For example, when the input terminal Input receives an on control signal, the control circuit 21 controls the switch circuit 22 to turn on and conduct. When the input terminal Input receives a off control signal, the control circuit 21 controls the switch circuit 22 to turn off and cut off. It can be understood that when the switch circuit 22 is in the on state, the intelligent electronic switch 20 outputs current through the load output terminal OUT to ensure that the load 30 can work normally.

[0059] The diagnostic enable terminal SEN is used to receive a diagnostic enable signal, and the diagnostic enable signal is used to determine whether to enable the diagnostic function of the intelligent electronic switch 20, that is, whether to allow the intelligent electronic switch 20 to output a signal through the diagnostic output terminal CS, that is, when the diagnostic enable terminal SEN receives the diagnostic enable signal, the intelligent electronic switch 20 can output the collected load current signal or temperature signal or power supply voltage signal or abnormal indication signal through the diagnostic output terminal CS. The specific signal type output by the diagnostic output terminal CS can be determined based on whether the switch circuit 22 of the intelligent electronic switch 20 is turned off due to an abnormality or based on the signals received by the first function selection terminal SEL0 and the second function selection terminal SEL1, which is not limited here.

[0060] Optionally, in this embodiment, in order to be fully compatible with the original functions of the intelligent electronic switch 20, the first function terminal FU1 and the second function terminal FU2 can reuse any two of the input terminal Input, the diagnosis enable terminal SEN, the first function selection terminal SEL0, the second function selection terminal SEL1, the diagnosis release terminal Fault and other terminals of the intelligent electronic switch 20. In this way, there is no need to change the peripheral application of the intelligent electronic switch, the cost is low, and the compatibility is good.

[0061] As an example, the first function terminal FU1 can reuse the diagnosis enable terminal SEN, and the second function terminal FU2 can reuse the input terminal Input. In other examples, the first function terminal FU1 and the second function terminal FU2 can also reuse other terminals, which are not limited in the embodiments of the present application.

[0062] It is understandable that in other embodiments of the present application, the first functional terminal FU1 and / or the second functional terminal FU2 may also be a terminal newly added to the intelligent electronic switch 20, or a combination of a newly added terminal and an original terminal, and the embodiments of the present application do not limit them. In other embodiments, the intelligent electronic switch 20 may also include other numbers of functional terminals, for example, one functional terminal or more than two functional terminals, which may be set according to actual needs.

[0063] In this embodiment, the first function terminal FU1 and the second function terminal FU2 are both connected to the control circuit 21, and the control circuit 21 is preset with a corresponding relationship between the external signal and the mode switching. For example, in this embodiment, when the first function terminal FU1 receives the first signal and the second function terminal FU2 receives the second signal, the control circuit 21 can control the intelligent electronic switch 20 to enter the bypass mode. In the bypass mode, since the protection and diagnosis function units inside the intelligent electronic switch 20 can partially or completely stop working, for example, the unit for realizing the protection function partially stops working, and the unit for realizing the diagnosis function by the user stops working completely, etc., this effectively reduces the power consumption of the internal units of the intelligent electronic switch 20, so that the self-consumption of the intelligent electronic switch 20 in the bypass mode is less than the self-consumption of the intelligent electronic switch 20 in the normal working mode.

[0064] For example, in the embodiment of the present application, the intelligent electronic switch 20 can also be connected to an external microcontroller through the input terminal Input, and control the switch state of the switch circuit 22 based on the switch control signal received by the input terminal Input. When the intelligent electronic switch 20 is in the normal working mode and the bypass mode, the switch circuit 22 is in the on state.

[0065] Optional, continue to refer to Figure 1 As shown, the intelligent electronic switch 20 can be connected to the microcontroller 40 through the first functional terminal FU1 and the second functional terminal FU2, so that the control circuit 21 can receive the first signal from the microcontroller 40 through the first functional terminal FU1 and receive the second signal from the microcontroller 40 through the second functional terminal FU2. In other embodiments, the control circuit 21 can also receive the first signal and the second signal from other devices or circuits through the first functional terminal FU1 and the second functional terminal FU2, which is not limited in the embodiments of the present application.

[0066] Optionally, when the intelligent electronic switch 20 operates in a normal working mode, if the first function terminal FU1 receives a first signal and the second function terminal FU2 receives a second signal, the control circuit 21 can control the intelligent electronic switch 20 to enter a bypass mode to reduce the self-power consumption of the intelligent electronic switch 20.

[0067] It is understandable that the self-consumption of the smart electronic switch in normal working mode is usually at the milliampere level, while when it is in bypass mode, the self-consumption can be reduced to the microampere level, thereby reducing the power consumption of the smart electronic switch and increasing the standby time.

[0068] Optionally, in one embodiment, the switch circuit 22 may include a power switch, which may be a common switch in the normal working mode and the bypass mode. In another embodiment, the switch circuit 22 may include a main power switch and a bypass switch. The main power switch is controlled to be turned on and conducted when the intelligent electronic switch 20 is in the normal working mode, and the bypass switch is controlled to be turned on and conducted when the intelligent electronic switch 20 is in the bypass mode. The embodiment of the present application does not limit the specific form of the switch circuit 22.

[0069] In one possible design of the present embodiment, the power switch or (main power switch and bypass switch) included in the switch circuit 22 may be an N-type metal-oxide-semiconductor field-effect transistor (N Meta1-Oxide-SemiconductorField-EffectTransistor, NMOS FET, NMOS tube), a PMOS tube, a junction field effect transistor (JunctionField EffectTransistor, JFET) or an insulated gate bipolar transistor (Insulated Gate BipolarTransistor, IGBT), etc. In another possible design of the present embodiment, the power switch or (main power switch and bypass switch) included in the switch circuit 22 may also be implemented as a silicon device, or may be implemented using other semiconductor materials, for example, silicon carbide (SiC), gallium arsenide (GaAs) or gallium nitride (GaN), etc. The present application embodiment does not limit the specific implementation form of the power switch or (main power switch and bypass switch), which may be selected according to actual needs.

[0070] Optionally, in practical applications, a fuse (not shown) may be connected in series between the battery 10 and the power supply terminal VBAT to prevent a fault caused by excessive current in the line. Other components may be provided between the power ground terminal GND and the negative electrode of the battery 10, for example, a reverse connection prevention diode and a current limiting resistor connected in parallel to improve the stability of the intelligent electronic switch 20.

[0071] Optional, in Figure 1 In the schematic diagram shown, the connection relationship between the control circuit 21 and the power supply unit is not shown, but in actual application, a power supply unit can be provided inside the intelligent electronic switch 20, and the internal power supply unit is connected to the power supply terminal VBAT to step down the voltage of the power supply terminal VBAT and provide it to the control circuit 21 and other circuits. In other embodiments, the power supply unit may not be provided inside the intelligent electronic switch 20, and in this case, the positive electrode of the battery 10 is also connected to the step-down unit, and the step-down unit outputs the stepped-down voltage to the intelligent electronic switch 20 to power the circuit inside the intelligent electronic switch 20.

[0072] The intelligent electronic switch provided in the embodiment of the present application includes, in addition to a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit, a first functional terminal and a second functional terminal, both of which are connected to the control circuit; when the first functional terminal receives a first signal and the second functional terminal receives a second signal, the control circuit controls the intelligent electronic switch to enter the bypass mode, the self-consumption of the intelligent electronic switch in the bypass mode is less than the self-consumption of the intelligent electronic switch in the normal working mode, and the switch circuit is in the on-state in both the bypass mode and the normal working mode, and the first functional terminal and the second functional terminal include any two of the input terminal, the diagnosis enable terminal, the function selection terminal, and the diagnosis release terminal. In this solution, the intelligent electronic switch reuses the original terminal to enter the bypass mode, does not need to change its peripheral application, has low cost, can reduce the self-consumption of the intelligent electronic switch on the premise of providing a load current path to the outside, thereby reducing the overall power consumption of the device where the intelligent electronic switch is located.

[0073] exist Figure 1 In the illustrated embodiment, after the intelligent electronic switch enters the bypass mode, it can reduce the self-consumption of the intelligent electronic switch by controlling the working state of at least one functional circuit to be different from the working state in the normal working mode. However, when the switch circuit is turned on, the microcontroller connected to the intelligent electronic switch usually still outputs a high-level signal through the input terminal Input. At this time, the power consumption of the microcontroller is still relatively high. For this reason, the present application also provides the following second embodiment to solve the problem of high power consumption of the microcontroller.

[0074] Figure 2 Schematic diagram of a circuit module of an electronic device provided in the second embodiment of the present application. Figure 2 As shown, in this embodiment, the control circuit 21 is also used to connect with the microcontroller 40 .

[0075] Optionally, after the intelligent electronic switch 20 enters the bypass mode, the control circuit 21 is further configured to output a bypass mode entry signal to the microcontroller 40 .

[0076] Reference Figure 2As shown, in this embodiment, the intelligent electronic switch 20 has a feedback terminal FB, and the feedback terminal FB is connected to the control circuit 21 and the microcontroller 40 respectively, so that after the intelligent electronic switch 20 enters the bypass mode, the control circuit 21 can send a bypass mode entry signal to the microcontroller 40 through the feedback terminal FB, and the microcontroller 40 can know that the intelligent electronic switch 20 has entered the bypass mode after receiving the bypass mode entry signal, and the microcontroller 40 can perform corresponding operations as needed. For example, after receiving the bypass mode entry signal, the microcontroller 40 can enter a low power consumption mode in order to reduce its own power consumption, that is, save the internal running program or data in the memory and enter the low power consumption mode to reduce its own power consumption.

[0077] Optionally, the feedback terminal FB can reuse the original terminals of the intelligent electronic switch 20, such as the input terminal Input, the diagnostic output terminal CS, etc. Of course, as another example, the feedback terminal FB can also be other terminals or newly added terminals of the intelligent electronic switch 20, and the embodiment of the present application does not limit the specific implementation of the feedback terminal FB.

[0078] In other embodiments of the present application, refer to Figure 2 As shown, the intelligent electronic switch 20 receives a first signal and a second signal from the microcontroller 40 indicating that the intelligent electronic switch 20 enters the bypass mode, and then the microcontroller 40 can enter the low power consumption mode without confirming whether the intelligent electronic switch 20 enters the bypass mode. It can be understood that Figure 2 In the figure, the first function terminal FU1 is taken as the diagnosis enable terminal SEN, and the second function terminal FU2 is taken as the input terminal Input for exemplary description.

[0079] In other embodiments of the present application, the intelligent electronic switch 20 may also be connected to the microcontroller 40 via the diagnostic output terminal CS. Generally, when the diagnostic function of the intelligent electronic switch 20 is enabled, the intelligent electronic switch 20 may output a signal representing the operating state of the intelligent electronic switch 20 via the diagnostic output terminal CS, for example, a current signal representing the current flowing through the switch circuit 22, a temperature signal representing the switch circuit 22, or a power supply voltage signal of the intelligent electronic switch 20. However, when the microcontroller 40 outputs the first signal via the first functional terminal FU1 and the second signal via the second functional terminal FU2, in order to reduce the error processing of the received signal by the microcontroller 40, at this time, the microcontroller 40 may shield the signal received from the diagnostic output terminal CS.

[0080] In practical applications, when the intelligent electronic switch receives the first signal through the first functional terminal FU1 and receives the second signal through the second functional terminal FU2, in order to improve the accuracy of mode switching, the receiving order of the first signal and the second signal can also be limited, so that the control circuit 21 will control the intelligent electronic switch 20 to enter the bypass mode only when the first signal and the second signal that meet the requirements are received and the receiving order of the first signal and the second signal meets the requirements.

[0081] In a possible design, when the first function terminal FU1 receives the first signal, that is, after the first function terminal FU1 receives the first signal, if the second function terminal FU2 receives the second signal, the control circuit 21 controls the intelligent electronic switch 20 to enter the bypass mode. That is, on the basis that the first function terminal FU1 accurately receives the first signal, it is determined whether the second function terminal FU2 accurately receives the second signal, and then it is determined whether to control the intelligent electronic switch 20 to enter the bypass mode.

[0082] Exemplarily, when the first function terminal FU1 is the diagnosis enable terminal SEN and the second function terminal FU2 is the input terminal Input, by judging whether the signal received at the input terminal Input meets the requirements based on whether the signal received at the diagnosis enable terminal SEN meets the requirements, it is possible to avoid the working mode being switched incorrectly and the judgment process of the bypass mode being frequently triggered, which not only saves power consumption but also improves the accuracy of mode switching.

[0083] Optionally, in a possible design of this embodiment, the first signal includes a first level signal and a second level signal that appear alternately, and the second signal includes a first level signal. The following structural composition diagram and working principle diagram of the control circuit 21 are used to explain whether the first signal and the second signal meet the conditions for entering the bypass mode.

[0084] For example, Figure 3A It is a structural diagram of the control circuit in the intelligent electronic switch. Figure 3B yes Figure 3A The working principle diagram of the control circuit is shown in the figure. Figure 3A As shown, in this embodiment, the control circuit 21 includes a first timing unit 211 , a second timing unit 212 , a third timing unit 213 , a fourth timing unit 214 , a first counting unit 215 and a logic control unit 216 .

[0085] Continue to refer to Figure 3AAs shown, the first timing unit 211 and the fourth timing unit 214 are both connected to the first functional terminal FU1, the fourth timing unit 214 is also connected to the first counting unit 215, the first counting unit 215 and the first timing unit 211 are also connected to the logic control unit 216, the logic control unit 216 is also connected to the second timing unit 212 and the third timing unit 213, and the second timing unit 212 is also connected to the second functional terminal FU2.

[0086] In an embodiment of the present application, the first timing unit 211 is in a non-timing state and starts timing when the first functional terminal FU1 receives a first edge signal, and outputs a first timing arrival signal when the continuous timing duration reaches a first duration threshold.

[0087] The fourth timing unit 214 is in an untiming state and starts timing when the first function end FU1 receives a first edge signal, and stops timing when the first function end FU1 receives a second edge signal. The fourth timing unit 214 outputs a counting trigger signal when the continuous timing duration is greater than or equal to the first preset duration t1 and less than or equal to the second preset duration t2, otherwise it outputs a counting reset signal. The first counting unit 215 performs cumulative counting when receiving the counting trigger signal, outputs a counting arrival signal when the accumulated counting value reaches the first counting threshold, and resets the counting when receiving the counting reset signal.

[0088] As an example, if the logic control unit 216 does not receive the first timing arrival signal before receiving the counting arrival signal, it outputs an enable signal, the third timing unit 213 is in a non-timing state and starts timing when the enable signal is received, and outputs a second timing arrival signal when the continuous timing duration reaches the second duration threshold, the second timing unit 212 starts working when receiving the enable signal and continuously times the first level signal received by the second functional terminal FU2, and the second timing unit 212 outputs a third timing arrival signal when the continuous timing duration is greater than or equal to the third preset duration; if the logic control unit 216 receives the third timing arrival signal before receiving the second timing arrival signal, the intelligent electronic switch 20 is controlled to enter the bypass mode.

[0089] In this embodiment, the first timing unit 211 is used to set a total duration threshold for determining whether the first signal meets the requirement, that is, the timing starts when the first functional terminal FU1 receives the first edge signal, and stops timing when the continuous timing duration reaches the first duration threshold, and outputs a first timing arrival signal. The fourth timing unit 214 is used to time the first level signal in the first signal (a level signal with the first edge signal as the starting point and the second edge signal as the ending point), and when the timing duration is between the first preset duration and the second preset duration, it is considered that the requirement is met and the first counting unit 215 can be triggered to count once, otherwise the original count of the first counting unit 215 will be triggered to be reset.

[0090] The logic control unit 216 can trigger the determination of whether the second signal meets the requirements when the count of the first counting unit 215 meets the requirements and the count duration does not reach the first duration threshold set by the first timing unit 211, for example, enabling the second timing unit 212 and the third timing unit 213. Among them, the third timing unit 213 is used to set the total duration threshold for determining whether the second signal meets the requirements, that is, the timing starts when the enable signal is received, and the timing stops when the continuous timing duration reaches the second duration threshold, and the second timing arrival signal is output. The second timing unit 212 is used to time the duration of the first level signal (the level signal with the first edge signal as the starting point and the second edge signal as the end point) in the second signal. If the second timing unit 212 reaches the third preset duration before the timing of the third timing unit 213 ends, it is considered that the second signal also meets the requirements, and the logic control unit 216 can control the intelligent electronic switch 20 to enter the bypass mode.

[0091] As an example, the first duration threshold is 24ms, the first preset duration is 1ms, the second preset duration is 2ms, the first number threshold is 8 times, the second duration threshold is 2ms, and the third preset duration is 0.3ms (300us). Assume that the first functional terminal FU1 is the SEN terminal, the second functional terminal FU2 is the Input terminal, the first level signal is a high level signal, the second level signal is a low level signal, the first edge signal is a rising edge signal, and the second edge signal is a falling edge signal. In this way, starting from the first rising edge received at the SEN terminal, if 8 pulses are received within 24ms (SEN_valid) and the high level signal of the pulse is between 1ms and 2ms (typically 1.5ms), starting from the falling edge of the 8th pulse, if the Input terminal receives a valid pulse signal within 2ms (i.e., the high level duration is 300us), it is considered that the indication signal indicating that the intelligent electronic switch 20 enters the bypass mode is received, and the logic control unit 216 can control the intelligent electronic switch 20 to enter the bypass mode.

[0092] Optional, Figure 3A and Figure 3B The solution shown does not limit the duration of the second level signal in the first signal, but in actual applications, when the second level signal in the first signal also meets the requirements, the mode switching of the intelligent electronic switch 20 can be controlled more accurately. Figure 3A and Figure 3B Based on the embodiment shown, by Figure 3C and Figure 3D The schematic diagram explains that the control circuit 21 determines whether to control the intelligent electronic switch 20 to enter the bypass mode according to the received first signal and the second signal.

[0093] For example, Figure 3C It is another structural diagram of the control circuit in the intelligent electronic switch. Figure 3D yes Figure 3C The working principle diagram of the control circuit is shown in the figure. Figure 3C As shown, in this embodiment, the control circuit 21 further includes a fifth timing unit 217, and the fifth timing unit 217 is connected to the first counting unit 215 and the first functional terminal FU1 respectively.

[0094] Continue to refer to Figure 3C and Figure 3D As shown, the first counting unit 215 outputs a counting signal to the fifth timing unit 217 after cumulative counting. The fifth timing unit 217 is in an untimed state and starts timing when it receives the counting signal, and outputs a counting lock signal to the first counting unit 215 to lock the count of the first counting unit 215. The fifth timing unit 217 stops timing when the first functional terminal FU1 receives the first edge signal. If the fifth timing unit 217 continues timing for a period greater than or equal to the fourth preset period and less than or equal to the fifth preset period, it outputs a counting unlock signal, otherwise it outputs a counting clear signal. The first counting unit 215 releases the counting lock of the first counting unit 215 after receiving the counting unlock signal.

[0095] In this embodiment, after the accumulated counting, the first counting unit 215 outputs a count signal to the fifth timing unit 217 to trigger the fifth timing unit 217 to start timing and output a count lock signal, thereby causing the first counting unit 215 to lock the existing count. When the continuous timing duration of the fifth timing unit 217 is between the fourth preset duration and the fifth preset duration, the fifth timing unit 217 sends a count unlock signal to the first counting unit 215 to enable the first counting unit 215 to perform subsequent operations. If the continuous timing duration of the fifth timing unit 217 is not between the fourth preset duration and the fifth preset duration, the fifth timing unit 217 sends a count clear signal to the first counting unit 215 to enable the first counting unit 215 to clear the original count.

[0096] Optionally, in actual applications, the fourth preset time length is 0.2 ms, the fifth preset time length is 1 ms, and the typical value of the duration of the second level signal in the first signal may be 0.3 ms, 0.5 ms, etc.

[0097] It can be understood that the embodiments of the present application do not limit the specific values ​​of the above-mentioned first duration threshold, first preset duration, second preset duration, first number threshold, second duration threshold, third preset duration, fourth preset duration, and fifth preset duration. They can be set according to actual needs and are not limited here.

[0098] Optionally, in the above embodiments of the present application, when the intelligent electronic switch 20 is in the bypass mode, if the first functional terminal FU1 receives a third signal, the control circuit 21 controls the intelligent electronic switch 20 to exit the bypass mode.

[0099] Exemplarily, the third signal may include a first level signal, and the control circuit 21 may further include a sixth timing unit (not shown). When the intelligent electronic switch 20 is in the bypass mode, the control circuit 21 may detect the signal received by the first functional terminal FU1. If the control circuit 21 receives the third signal through the first functional terminal FU1, specifically, the sixth timing unit is triggered to start timing when the first functional terminal FU1 receives the first level signal, and when the continuous timing duration of the sixth timing unit reaches the third duration threshold, it is considered that the first functional terminal FU1 has received the third signal, and at this time, the control circuit 21 may control the intelligent electronic switch 20 to exit the bypass mode.

[0100] In the embodiments of the present application, by limiting the specific implementation of the first signal and the second signal for entering the bypass mode and the third signal for exiting the bypass mode, the accuracy of entering and exiting the bypass mode is improved, and the reduction of the self-power consumption of the intelligent electronic switch and the normal operation of the intelligent electronic switch are taken into account, thereby improving the application experience.

[0101] The above embodiments introduce the specific implementation of triggering the intelligent electronic switch 20 to enter the bypass mode by receiving the first signal through the first functional terminal FU1 and the second signal through the second functional terminal FU2, and when the intelligent electronic switch 20 works in the normal working mode and the bypass mode, the switch circuit 22 is in the on state, and the load output terminal OUT has a load current flowing through it. The following explains different implementations of the switch circuit 22 through different embodiments.

[0102] Figure 4 Schematic diagram of a circuit module of an electronic device provided in the third embodiment of the present application. Figure 4 As shown, in this embodiment, the switch circuit 22 includes a main power switch Q1 and a bypass switch Q2.

[0103] In this embodiment, the first end of the main power switch Q1 and the first end of the bypass switch Q2 are both connected to the power supply terminal VBAT or the power ground terminal GND, the second end of the main power switch Q1 and the second end of the bypass switch Q2 are both connected to the load output terminal OUT, and the control end of the main power switch Q1 and the control end of the bypass switch Q2 are both connected to the control circuit 21. In an example, when the first end of the main power switch Q1 and the first end of the bypass switch Q2 are both connected to the power supply terminal VBAT, the main power switch Q1 and the bypass switch Q2 are connected to be used as high-side switches, for details, refer to Figure 4 In another example, when the first end of the main power switch Q1 and the first end of the bypass switch Q2 are both connected to the power ground GND, the main power switch Q1 and the bypass switch Q2 are connected as low-side switches. This embodiment is not limited to this.

[0104] Optionally, when the intelligent electronic switch 20 is in the normal working mode, the control circuit 21 controls the main power switch Q1 to turn on and the bypass switch Q2 to turn off. When the intelligent electronic switch 20 enters the bypass mode, the control circuit 21 controls the bypass switch Q2 to turn on and the main power switch Q1 to turn off. The power consumption of the control circuit 21 when controlling the intelligent electronic switch 20 to work in the normal working mode is greater than the power consumption when controlling the intelligent electronic switch 20 to work in the bypass mode.

[0105] Optionally, the main power switch Q1 and the bypass switch Q2 can be switch tubes of the same type or of different types. For example, the main power switch Q1 and the bypass switch Q2 are both N-type switch tubes or both P-type switch tubes or one of them is an N-type switch tube and the other is a P-type switch tube. However, in actual applications, it is usually required that the area of ​​the main power switch Q1 is larger than the area of ​​the bypass switch Q2, so that the load capacity of the main power switch Q1 is greater than the load capacity of the bypass switch Q2, the area of ​​the main power switch Q1 is greater than the area of ​​the bypass switch Q2, and the maximum current flowing through the main power switch Q1 when the main power switch Q1 is turned on is greater than the maximum current flowing through the bypass switch Q2 when the bypass switch Q2 is turned on.

[0106] Continue to refer to Figure 4 As shown, in a possible design, the control circuit 21 includes a logic control unit 21A, a first drive unit 21B and a second drive unit 21C. The logic control unit 21A is connected to the first function terminal FU1, the second function terminal FU2, the first drive unit 21B and the second drive unit 21C respectively, the first drive unit 21B is connected to the control end of the main power switch Q1, and the second drive unit 21C is connected to the control end of the bypass switch Q2.

[0107] Optionally, when the intelligent electronic switch 20 is in a normal working mode, the logic control unit 21A controls the main power switch Q1 to turn on through the first drive unit 21B; and when the intelligent electronic switch 20 enters the bypass mode, the logic control unit 21A controls the bypass switch Q2 to turn on through the second drive unit 21C, and the power consumption of the first drive unit 21B when working is greater than the power consumption of the second drive unit 21C when working.

[0108] In this embodiment, two driving units are provided in the control circuit 21 to correspondingly control the switching states of the main power switch Q1 and the bypass switch Q2, so as to ensure that the control branches of the main power switch Q1 and the bypass switch Q2 are isolated and avoid confusion in the control logic of the main power switch Q1 and the bypass switch Q2.

[0109] For example, refer to Figure 4 As shown, when the switch circuit 22 includes a MOS tube, the main power switch Q1 can be an N-type MOS tube, and the bypass switch Q2 can be a P-type MOS tube. Accordingly, the first driving unit 21B includes a driving module 21B1 and a boosting module 21B2 for increasing the output voltage of the driving module 21B1. After the output voltage of the driving module 21B1 is increased by the boosting module 21B2, the gate-source voltage signal of the N-type MOS tube can meet the turn-on requirement of the N-type MOS tube. However, in view of the conduction characteristics of the P-type MOS tube, the second driving unit 21C that drives the P-type MOS tube to turn on does not need a boosting module, etc. Therefore, the second driving unit 21C saves at least a boosting module relative to the first driving unit 21B, so the power consumption of the second driving unit 21C when working will be lower than the power consumption of the first driving unit 21B when working.

[0110] In one possible design, reference Figure 4As shown, the boost module 21B1 is implemented in the form of a charge pump. For example, the charge pump includes an oscillator, a P-type MOS transistor CP_P1, an N-type MOS transistor CP_N1, capacitors C1 and C2, and diodes D1 and D2, wherein the control ends of the P-type MOS transistor CP_P1 and the N-type MOS transistor CP_N1 are connected to the oscillator, the drain of the P-type MOS transistor CP_P1 is connected to the power supply end VBAT, the source thereof is connected to the source of the N-type MOS transistor CP_N1 and the connection point is Al, the drain of the N-type MOS transistor CP_N1 is connected to the first power supply end Vs, based on the voltage withstand capability of the P-type MOS transistor CP_P1 and the N-type MOS transistor CP_N1, for example, 5V, the first power supply end Vs is usually 5V lower than the voltage of the power supply end VBAT; one end of the capacitor C1 is connected to the connection point A1, and the other end is connected to the cathode of the diode D1 and the anode of the diode D2, the anode of the diode D1 and one end of the capacitor C2 are both connected to the power supply end VBAT, and the cathode of the diode D2 is connected to the other end of the capacitor C2. The oscillator is used to generate an oscillation frequency to turn on or off the P-type MOS tube CP_P1 and the N-type MOS tube CP_N1, the capacitor C1 is used to increase the voltage output by the charge pump, the capacitor C2 is used to store energy, and the diodes D1 and D2 are used to limit the current direction.

[0111] Optional, continue to refer to Figure 4 As shown, the driving module 21B2 may include a switch tube D_P1 and a switch tube D_N1, the control end of the main power switch Q1 is connected to the drain of the switch tube D_P1 and the switch tube D_N1, the control ends of the switch tube D_P1 and the switch tube D_N1 are both connected to the logic control unit 21A, the source of the switch tube D_P1 is connected to the output end of the boost module, and the source of the switch tube D_N1 is connected to the load output end OUT, so that the logic control unit 21A can control the switching state of the main power switch Q1 by controlling the switching state of the switch tube D_P1 and the switch tube D_N1.

[0112] For example, in Figure 4In the illustrated embodiment, when the bypass switch Q2 is a P-type switch tube, the second driving unit can be implemented by the switch X1 and the switch X2. For example, the control ends of the switch X1 and the switch X2 are both connected to the logic control unit 21A, the second end of the switch X1 and the first end of the switch X2 are both connected to the control end of the bypass switch Q2, the first end of the switch X1 is connected to the power supply end, and the second end of the switch X2 is connected to the power ground end GND. As an example, the switch X1 and the switch X2 are the same type of switch tubes. In this case, an inverter is also connected between the logic control unit 21A and the control end of the switch X1 or the control end of the switch X2; as another example, the switch X1 and the switch X2 are different types of switch tubes. In this case, an inverter is not required between the logic control unit 21A and the switch X1 or the switch X2. In this way, when the logic control unit 21A controls the switch X1 to turn on and the switch X2 to turn off, the bypass switch Q2 is turned off, and when the switch X1 is turned off and the switch X2 is turned on, the bypass switch Q2 is turned on.

[0113] Optionally, in other possible designs of the present application, the control circuit 21 includes a logic control unit 21A and a drive unit (not shown). The logic control unit 21A is respectively connected to the first functional terminal FU1, the second functional terminal FU2, and the drive unit, and the drive unit is connected to the control end of the main power switch Q1 and the control end of the bypass switch Q2. Accordingly, in this possible design, when the intelligent electronic switch 20 is in the normal working mode, the logic control unit 21A controls the drive unit to work in the first driving state to drive the main power switch Q1 to turn on and conduct; when the intelligent electronic switch 20 is working in the bypass mode, the logic control unit 21A controls the drive unit to work in the second driving state to control the bypass switch Q2 to turn on and conduct, and the power consumption of the drive unit when working in the first driving state is greater than the power consumption when working in the second driving state.

[0114] In this embodiment, the main power switch Q1 and the bypass switch Q2 may share a driving unit, and the logic control unit 21A may control the working state of the driving unit based on the working mode of the intelligent electronic switch 20 .

[0115] As an example, assuming that the driving unit includes a driving module and a boosting module, the boosting module is connected to the driving module to increase the output voltage of the driving module, when the main power switch Q1 is an N-type switch tube and the bypass switch Q2 is a P-type switch tube, the logic control unit 21A can control the boosting module and the driving module to work in the normal working mode, so that the driving unit works in the first driving state, so that the boosted driving module can drive the N-type switch tube to turn on and conduct, and the logic control unit 21A can control the driving unit module in the bypass mode but stop the boosting module, and the driving unit works in the second driving state, that is, the driving module that has not been boosted can also drive the P-type switch tube to turn on and conduct. Therefore, the power consumption of the driving unit when working in the second driving state is less than the power consumption when working in the first driving state.

[0116] As another example, when the main power switch Q1 and the bypass switch Q2 are both N-type switch tubes, the driving unit may include a driving module, a first boost module and a second boost module, and the first boost module and the second boost module are both connected to the driving module, wherein in the normal working mode, the logic control unit 21A controls the first boost module and the driving module to work, and increases the output voltage of the driving module by a first voltage through the first boost module, so that the driving module drives the main power switch Q1 to turn on and conduct in the first driving state; in the bypass mode, the logic control unit 21A controls the second boost module and the driving module to work, and increases the output voltage of the driving module by a second voltage through the second boost module, so that the driving module drives the bypass switch Q2 to turn on and conduct in the second driving state, wherein the first voltage is greater than the second voltage, and accordingly, the power consumption of the first boost module is greater than that of the second boost module, so the power consumption of the driving unit when working in the second driving state is less than the power consumption when working in the first driving state.

[0117] It can be understood that in each embodiment of the present application, the specific structural composition of the driving unit is not limited, and different components can be added according to actual circuit requirements. For example, the driving unit can also include elements such as a level shifter. The level shifter is connected between the control circuit 21 and the driving unit, and can convert a low-voltage control signal into a high-voltage control signal, thereby realizing the control of the high-voltage output stage by the low-voltage logic, and then realizing the driving switch circuit 22 to turn on and conduct.

[0118] In the embodiment of the present application, the switch circuit includes a main power switch and a bypass switch. The control circuit can control the main power switch to be turned on and the bypass switch to be turned off in the normal working mode, and control the bypass switch to be turned on and the main power switch to be turned off in the bypass mode. In addition, by describing the structure of the control circuit, it is explained that the power consumption of the intelligent electronic switch in the normal working mode is less than that in the bypass mode. Therefore, the intelligent electronic switch provided in the embodiment of the present application not only meets the load current demand, but also saves power consumption and improves the application experience.

[0119] Figure 5 Schematic diagram of a circuit module of an electronic device provided in the fourth embodiment of the present application. Figure 5 As shown, in this embodiment, the switch circuit 22 may include a power switch Q, and the control circuit 21 includes a logic control unit 21A, a first drive unit 21B, and a current limiting drive unit 21D. Among them, the first end of the power switch Q is connected to the power supply terminal VBAT or the power ground terminal GND, the second end of the power switch Q is connected to the load output terminal OUT, the control end of the power switch Q is connected to the first drive unit 21B and the current limiting drive unit 21D, the first drive unit 21B and the current limiting drive unit 21D are also connected to the logic control unit 21A, and the logic control unit 21A is used to control the enabling state of the first drive unit 21B and the current limiting drive unit 21D.

[0120] Optional, in Figure 5 In the illustrated embodiment, the power switch Q is an N-type switch tube N1 and is connected as a high-side switch, that is, two ends of the power switch Q are respectively connected to the power supply terminal VBAT and the load output terminal OUT for explanation.

[0121] Exemplarily, when the intelligent electronic switch 20 operates in the normal working mode, the logic control unit 21A drives the power switch Q to turn on via the first drive unit 21B; when the intelligent electronic switch 20 operates in the bypass mode, the logic control unit 21A drives the power switch Q to turn on via the current limiting drive unit 21D.

[0122] Optionally, in this embodiment, the first driving unit 21B may include a level shifter and a driving module (not shown), and the driving module may drive the power switch Q to turn on and conduct based on the signal transmitted by the level shifter. It is understandable that when the power switch Q is an N-type switch tube and is connected as a high-side switch, the first driving unit further includes a boost module (e.g., a charge pump) connected to the driving module, so that the driving module can drive the N-type switch tube connected as a high-side switch to turn on and conduct.

[0123] In this embodiment, the main function of the current limiting driving unit 21D is to drive the power switch Q to turn on and to limit the maximum current flowing through the power switch Q.

[0124] As an example, continue to refer to Figure 5 As shown, the current limiting driving unit 21D includes a transistor M1 and a constant current source I1, the transistor M1 and the power switch Q are of the same type, the transistor M1 and the constant current source I1 are connected to form a current limiting driving branch, one end of the current limiting driving branch is connected to one end of the power switch Q, the other end is connected to the power supply terminal VBAT or the power ground terminal GND, the control end is connected to the logic control unit 216, the drain of the transistor M1 is connected to its control end, and the control end is also connected to the control end of the power switch Q. At this time, in the bypass mode, the logic control unit 216 controls the current limiting driving unit 21D to work, so as to control the power switch Q to turn on and conduct through the current limiting driving unit 21D, and the current value flowing through the power switch Q is less than or equal to the first current limiting value set by the current limiting driving unit 21D, the first current limiting value is related to the current value provided by the constant current source I1, the current mirror ratio of the transistor M1 and the power switch Q, and the first current limiting value is less than the maximum current value flowing through the switch circuit 22 in the normal working mode.

[0125] Optionally, in this application, the value range of the first current limit value can be 1uA~100 u A, for example, the first current limit value can be 10 u A: It is understandable that the first value range may also be other values, which is not limited in this embodiment.

[0126] It can be understood that in a specific implementation, the current limiting drive unit 21D can also be implemented through other structures. For example, the current limiting drive unit 21D can also include one or more mirror units, or the constant current source I1 is replaced with a constant current source I1 of other specifications and one or more mirror units, etc. Correspondingly, the connection relationship between the internal circuit elements of the current limiting drive unit 21D can also be adjusted according to actual needs, etc. This embodiment does not limit the specific structure of the current limiting drive unit 21D.

[0127] In this embodiment, the current limiting driving unit can set the maximum current value flowing through the power switch through a current source and a transistor. It has a simple structure and is easy to implement. Compared with the first driving unit, it has lower power consumption, saving power consumption while meeting the load current requirements.

[0128] It can be understood that in each embodiment of the present application, Figure 4 and Figure 5 The logic control unit in Figure 3A and Figure 3CThe logic control unit in can be the same module or different components in the same logic control circuit, and the embodiments of the present application do not limit this.

[0129] Optionally, based on the above embodiment, Figure 6 Schematic diagram of a circuit structure of an electronic device provided in the fifth embodiment of the present application. Figure 6 As shown, the intelligent electronic switch 20 may further include a diagnostic circuit 23 and a diagnostic output terminal CS. The diagnostic circuit 23 is connected to the control circuit 21 and the diagnostic output terminal CS. The diagnostic circuit 23 is used to collect parameter information of the intelligent electronic switch 20 and output it to the microcontroller 40 via the diagnostic output terminal CS, so that the microcontroller 40 diagnoses the state of the intelligent electronic switch 20.

[0130] In the normal working mode, the control circuit 21 controls the diagnostic circuit 23 to work in the first diagnostic state, and in the bypass mode, the control circuit 21 controls the diagnostic circuit 23 to work in the second diagnostic state, and the power consumption of the diagnostic circuit 23 working in the second diagnostic state is less than the power consumption of the diagnostic circuit 23 working in the first diagnostic state. For example, in the normal working mode, the diagnostic circuit 23 works normally, and in the bypass mode, the diagnostic circuit 23 stops working or some modules of the diagnostic circuit 23 stop working or the diagnostic circuit works in the energy-saving state or some modules of the diagnostic circuit 23 work in the energy-saving state, wherein the energy-saving state may be a periodic working state.

[0131] In this embodiment, the diagnostic circuit 23 can monitor some working indicators of the intelligent electronic switch 20 and obtain parameter information of the intelligent electronic switch 20 when the switch circuit 22 is in the on state, and output it to the microcontroller 40 through the diagnostic output terminal CS, so that the microcontroller 40 can diagnose the state of the intelligent electronic switch 20 based on the received parameter information.

[0132] Exemplarily, in the intelligent electronic switch 20, the diagnostic circuit 23 can obtain at least one of the current information flowing through the switch circuit 22, the temperature information of the switch circuit 22, the power supply voltage information of the intelligent electronic switch 20, and the abnormal indication information that the switch circuit 22 is abnormally shut down, and can output the corresponding parameter information to the microcontroller 40 through the diagnostic output terminal based on the function selection of the microcontroller 40, so that the microcontroller 40 can diagnose the state of the intelligent electronic switch 20, thereby more accurately controlling the working state of the intelligent electronic switch 20.

[0133] In this technical solution, when the smart electronic switch controls the switch circuit to be in the on state, it can also control the working state of the diagnostic circuit according to the working mode of the smart electronic switch. On the basis of ensuring the normal operation of the load, it effectively reduces the self-consumption of the smart electronic switch, extends the battery life of the battery connected to the smart electronic switch, and improves the application experience.

[0134] Further, in the embodiments of the present application, continue to refer to Figure 6 As shown, the intelligent electronic switch 20 may further include a protection circuit 24 . The protection circuit 24 is connected to the control circuit 21 . The protection circuit 24 is used to protect the intelligent electronic switch 20 .

[0135] When the intelligent electronic switch 20 operates in the normal working mode, the control circuit 21 can control the protection circuit 24 to operate in the first protection state when controlling the switch circuit 22 to be in the on state, and when the intelligent electronic switch 20 operates in the bypass mode, the control circuit 21 can control the protection circuit 24 to operate in the second protection state when controlling the switch circuit 22 to be in the on state, wherein the power consumption of the protection circuit 24 operating in the second protection state is less than the power consumption of the protection circuit 24 operating in the first protection state, so as to reduce the power consumption of the protection circuit in the bypass mode.

[0136] For example, the protection circuit 24 includes a current protection unit, an over-temperature protection unit, etc. Among them, the current protection unit may include an over-current protection unit and / or a current limiting protection unit to trigger current protection of the intelligent electronic switch 20 when the current flowing through the switch circuit 22 is abnormal. Optionally, the power consumption of the current protection unit in bypass mode is less than the power consumption in normal working mode, for example, in bypass mode, the current protection unit stops working. The power consumption of the over-temperature protection unit in bypass mode is less than the power consumption in normal working mode, for example, the over-temperature protection threshold of the over-temperature protection unit in bypass mode is less than the over-temperature protection threshold in normal working mode, or, in bypass mode, an over-temperature protection unit with lower power consumption is selected.

[0137] It is understandable that other parts not detailed in the above embodiments can be found in the records of other embodiments of the present application and will not be described in detail here.

[0138] Optionally, based on the above embodiments, the embodiment of the present application further provides an integrated circuit chip, the integrated circuit chip includes the intelligent electronic switch 20 in the above embodiments, that is, the above intelligent electronic switch 20 can be made on the same semiconductor substrate. Among them, the power supply terminal VBAT is a power supply pin, the power ground terminal GND is a power ground pin, and the load output terminal OUT is a load output pin.

[0139] Optionally, other embodiments of the present application further provide a chip product, which may include the above-mentioned intelligent electronic switch 20, wherein the components of the intelligent electronic switch 20 except the switch circuit 22 or some components of the switch circuit 22 are located on a first integrated circuit chip, and the switch circuit 22 or some components of the switch circuit 22 are located on a second integrated circuit chip, that is, the first integrated circuit chip is made on one semiconductor substrate, and the second integrated circuit chip is made on another semiconductor substrate.

[0140] Optionally, when the switching circuit 22 includes a main power switch Q1 and a bypass switch Q2, as an example, the control circuit 21 and the bypass switch Q2 are located on a first integrated circuit chip, and the main power switch Q1 is located on a second integrated circuit chip; as another example, the control circuit 21 is located on the first integrated circuit chip, and the main power switch Q1 and the bypass switch Q2 are both located on the second integrated circuit chip.

[0141] Among them, the power supply terminal VBAT is the power supply pin, the power ground terminal GND is the power ground pin, the load output terminal OUT is the load output pin, the first function terminal FU1 is the first function pin, the second function terminal FU2 is the second function pin, the power supply pin, the power ground pin, the first function pin, and the second function pin are located on the first integrated circuit chip, and the load output pin is located on the second integrated circuit chip. In addition, the first integrated circuit chip also includes other pins, such as input pins, diagnostic enable pins, diagnostic output pins, first drive pins, etc., and the second integrated circuit chip also includes other pins, such as second drive pins, wherein the first drive pin is connected to the drive circuit and the second drive pin respectively, and the second drive pin is connected to the control end of the switch circuit 22. It can be understood that the first integrated circuit chip and the second integrated circuit chip can also add other pins, omit related pins, or merge related pins as needed. Here, the first integrated circuit chip and the second integrated circuit chip are packaged into one product.

[0142] In addition, in other embodiments of the present application, a car is also provided. The car can be an electric car, such as an electric passenger car or an electric commercial vehicle, or a hybrid car or a fuel car. Figures 1 to 6 As shown, the automobile includes a battery 10 , a load 30 , a microcontroller 40 and an intelligent electronic switch 20 .

[0143] The battery 10 is generally a storage battery, which provides voltages such as 12V, 24V, 48V, etc., and can also be other types of batteries. The load 30 includes at least one of a resistive load, an inductive load, and a capacitive load. The resistive load is, for example, a seat adjustment device, an auxiliary heating device, a window heating device, a light emitting diode (LED), a rear lighting, or other resistive loads. The inductive load is, for example, a pump, an actuator, a motor, an anti-lock braking system (ABS), an electronic braking system (EBS), a fan, or other systems including inductive loads for one or more wiper systems. The capacitive load is, for example, a lighting element, such as a xenon arc lamp.

[0144] The microcontroller 40 is connected to the intelligent electronic switch 20 to control the intelligent electronic switch 20. At the same time, the intelligent electronic switch 20 feeds back its state and related parameter information, such as related parameter information of diagnosis, to the microcontroller 40 for processing. For example, the microcontroller 40 can be connected to the intelligent electronic switch 20 through the first function terminal FU1 and the second function terminal FU2 to control the working mode of the intelligent electronic switch 20 by outputting the first signal and the second signal.

[0145] It is understandable that the intelligent electronic switch and integrated circuit chip of this embodiment are not limited to use in automotive electronics, but can also be used in industrial automation, aerospace and other fields, which will not be elaborated here.

[0146] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0147] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An intelligent electronic switch, characterized in that: It includes a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit; The power supply terminal and the power ground terminal are used to connect to a battery, and the load output terminal is used to connect to a load; the switch circuit has a first end connected to the power supply terminal or the power ground terminal, a second end connected to the load output terminal, and a control end connected to the control circuit, and the control circuit is used to control whether the switch circuit is turned on or not; The intelligent electronic switch further includes a first functional terminal and a second functional terminal, both of which are connected to the control circuit; when the first functional terminal receives a first signal and the second functional terminal receives a second signal, the control circuit controls the intelligent electronic switch to enter a bypass mode, and the first functional terminal and the second functional terminal include any two of an input terminal, a diagnosis enabling terminal, a function selecting terminal, and a diagnosis releasing terminal; The self-consumption of the intelligent electronic switch in the bypass mode is less than that in the normal working mode. The switch circuit is in an on-state in both the bypass mode and the normal working mode.

2. The intelligent electronic switch according to claim 1, characterized in that: The control circuit is also used to connect with a microcontroller; After the intelligent electronic switch enters the bypass mode, the control circuit is further configured to output a bypass mode entry signal to the microcontroller.

3. The intelligent electronic switch according to claim 1, characterized in that: When the first function end receives the first signal, if the second function end receives the second signal, the control circuit controls the intelligent electronic switch to enter the bypass mode.

4. The intelligent electronic switch according to claim 3, characterized in that: The first signal includes a first level signal and a second level signal that appear alternately; the second signal includes a first level signal; The control circuit includes a first timing unit, a second timing unit, a third timing unit, a fourth timing unit, a first counting unit and a logic control unit; The first timing unit and the fourth timing unit are both connected to the first functional end, the fourth timing unit is also connected to the first counting unit, the first counting unit and the first timing unit are also connected to the logic control unit, the logic control unit is also connected to the second timing unit and the third timing unit, and the second timing unit is also connected to the second functional end; The first timing unit is in a non-timing state and starts timing when the first functional end receives a first edge signal, and outputs a first timing arrival signal when the continuous timing duration reaches a first duration threshold; The fourth timing unit is in a non-timing state and starts timing when the first functional end receives a first edge signal, and stops timing when the first functional end receives a second edge signal. The fourth timing unit outputs a counting trigger signal when the continuous timing duration is greater than or equal to the first preset duration and less than or equal to the second preset duration, otherwise outputs a counting clearing signal. The first counting unit performs cumulative counting when receiving the counting trigger signal, outputs a counting arrival signal when the accumulated counting value reaches the first counting threshold, and performs counting clearing when receiving the counting clearing signal; If the logic control unit does not receive the first timing arrival signal before receiving the count arrival signal, an enable signal is output, the third timing unit is in a non-timing state and starts timing when the enable signal is received, and outputs a second timing arrival signal when the continuous timing duration reaches a second duration threshold, the second timing unit starts working when receiving the enable signal and continuously times the first level signal received by the second functional terminal, and the second timing unit outputs a third timing arrival signal when the continuous timing duration is greater than or equal to a third preset duration; If the logic control unit receives the third timing arrival signal before receiving the second timing arrival signal, the intelligent electronic switch is controlled to enter the bypass mode.

5. The intelligent electronic switch according to claim 4, characterized in that: The control circuit further includes a fifth timing unit, and the fifth timing unit is connected to the first counting unit and the first functional end respectively; The first counting unit outputs a count signal to the fifth timing unit after cumulative counting. The fifth timing unit is in a non-timing state and starts timing when it receives the count signal, and outputs a count lock signal to the first counting unit to lock the count of the first counting unit. The fifth timing unit stops timing when the first functional end receives a first edge signal. If the fifth timing unit continues timing for a duration greater than or equal to a fourth preset duration and less than or equal to a fifth preset duration, it outputs a count unlock signal, otherwise it outputs the count reset signal. The first counting unit releases the count lock of the first counting unit after receiving the count unlock signal.

6. The intelligent electronic switch according to any one of claims 1 to 5, characterized in that: When the intelligent electronic switch is in the bypass mode, if the first functional terminal receives a third signal, the control circuit controls the intelligent electronic switch to exit the bypass mode.

7. The intelligent electronic switch according to any one of claims 1 to 5, characterized in that: The switch circuit includes a main power switch and a bypass switch; The first end of the main power switch and the first end of the bypass switch are both connected to a power supply end or a power ground end, the second end of the main power switch and the second end of the bypass switch are both connected to a load output end, and the control end of the main power switch and the control end of the bypass switch are both connected to the control circuit; When the intelligent electronic switch is in a normal working mode, the control circuit controls the main power switch to be turned on and the bypass switch to be turned off. When the intelligent electronic switch enters a bypass mode, the control circuit controls the bypass switch to be turned on and the main power switch to be turned off. The power consumption of the control circuit when controlling the intelligent electronic switch to work in the normal working mode is greater than the power consumption when controlling the intelligent electronic switch to work in the bypass mode.

8. The intelligent electronic switch according to any one of claims 1 to 5, characterized in that: The switch circuit includes a power switch, the control circuit includes a logic control unit, a first drive unit and a current limiting drive unit, the first end of the power switch is connected to a power supply end or a power ground end, the second end of the power switch is connected to a load output end, the control end of the power switch is connected to the first drive unit and the current limiting drive unit, the first drive unit and the current limiting drive unit are also connected to the logic control unit, and the logic control unit is used to control the enabling state of the first drive unit and the current limiting drive unit; When the intelligent electronic switch works in a normal working mode, the logic control unit drives the power switch to turn on via the first driving unit; when the intelligent electronic switch works in a bypass mode, the logic control unit drives the power switch to turn on via the current limiting driving unit.

9. An integrated circuit chip, characterized in that: The intelligent electronic switch according to any one of claims 1 to 8, wherein the power supply terminal is a power supply pin, the power ground terminal is a power ground pin, the load output terminal is a load output pin, the first function terminal is a first function pin, and the second function terminal is a second function pin.

10. A chip product, characterized in that: The intelligent electronic switch according to any one of claims 1 to 8, wherein the components of the intelligent electronic switch other than the switch circuit or some components of the switch circuit are located on a first integrated circuit chip, and correspondingly, the switch circuit or some components of the switch circuit are located on a second integrated circuit chip; Among them, the power supply end is a power supply pin, the power ground end is a power ground pin, the load output end is a load output pin, the first function end is a first function pin, and the second function end is a second function pin. The power supply pin, the power ground pin, the first function pin and the second function pin are located on a first integrated circuit chip, and the load output pin is located on a second integrated circuit chip.

11. A car, characterized in that: Comprising the intelligent electronic switch according to any one of claims 1 to 8, or the integrated circuit chip according to claim 9, or the chip product according to claim 10; It also includes a battery, a load and a microcontroller; wherein the positive electrode of the battery is connected to the power supply terminal, the negative electrode of the battery is connected to the power ground terminal, one end of the load is connected to the load output terminal, the other end of the load is connected to the power ground terminal or the power supply terminal, and the microcontroller is connected to the intelligent electronic switch.

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