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, the intelligent electronic switch can work in different working modes, and the working state of an internal functional circuit is controlled according to the working mode, for example, the intelligent electronic switch comprises a control circuit and a diagnosis circuit, so that the intelligent electronic switch can work in a normal working mode, and the intelligent electronic switch can work in different working modes. In the first diagnosis mode, the control circuit controls the diagnosis circuit to work in the first diagnosis state, in the bypass mode, the control circuit controls the diagnosis circuit to work in the second diagnosis state, and the power consumption of the diagnosis circuit working in the second diagnosis state is smaller than that of the diagnosis circuit working in the second diagnosis state. At least on the basis that the working states of other circuits in the intelligent electronic switch are consistent, the self power consumption of the intelligent electronic switch in the bypass mode is smaller than the self power consumption of the intelligent electronic switch in the normal working mode.

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 and 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 particularly 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] In the prior art, when the intelligent electronic switch has a load current output, the intelligent electronic switch works in a normal working mode and its own power consumption is relatively large, resulting in a short standby time of the intelligent electronic switch and a poor user experience. 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] In a first aspect, the present application provides an intelligent electronic switch, including a power supply terminal, a power ground terminal, a load output terminal, a switch circuit, and a control circuit;

[0006] The power supply end and the power ground end are used to be connected to a battery, the load output end is used to be connected to a load and one end of a switch circuit, the other end of the switch circuit is connected to the power supply end or the power ground end, the switch circuit is also connected to the control circuit, and the control circuit is used to control the switch circuit to be turned on or off;

[0007] It also includes a diagnostic circuit and a diagnostic output terminal, wherein the diagnostic circuit is connected to the control circuit and the diagnostic output terminal, and the diagnostic circuit is used to collect parameter information of the intelligent electronic switch and output it to the microcontroller via the diagnostic output terminal, so that the microcontroller can diagnose the state of the intelligent electronic switch;

[0008] When the intelligent electronic switch is in a normal working mode and a bypass mode, the switch circuit is in an on state. In the normal working mode, the control circuit controls the diagnostic circuit to work in a first diagnostic state. In the bypass mode, the control circuit controls the diagnostic circuit to work in a second diagnostic state. The power consumption of the diagnostic circuit working in the second diagnostic state is less than the power consumption of the diagnostic circuit working in the first diagnostic state.

[0009] In a possible design of the first aspect, in the bypass mode, the diagnostic circuit stops working.

[0010] In another possible design of the first aspect, the intelligent electronic switch further includes a diagnosis enable terminal, the diagnostic circuit includes a signal processing unit and a monitoring unit, the diagnosis enable terminal is connected to the signal processing unit, the signal processing unit is also connected to the monitoring unit, the monitoring unit is also connected to the control circuit, the monitoring unit is used to collect the output current of the intelligent electronic switch, and the signal processing unit connects the monitoring unit and the diagnostic output terminal when the diagnosis enable terminal receives the first level signal;

[0011] In the normal operation mode, the monitoring unit operates in a first monitoring state; in the bypass mode, the monitoring unit operates in a second monitoring state, and the power consumption of the monitoring unit in the second monitoring state is less than that in the first monitoring state.

[0012] Optionally, the diagnostic circuit further includes an exception processing unit, which is connected to the signal processing unit and the control circuit, and is used to generate exception information when an exception occurs in the intelligent electronic switch, and the signal processing unit connects the monitoring unit and the diagnostic output end when the exception information is not received, and connects the exception processing unit and the diagnostic output end when the exception information is received;

[0013] In the normal working mode, the exception handling unit operates normally; in the bypass mode, the exception handling unit stops operating or operates in a power-saving state.

[0014] Optionally, when the intelligent electronic switch includes at least two monitoring units, the intelligent electronic switch further includes a function selection terminal; the function selection terminal and the at least two monitoring units are connected to the signal processing unit, and the at least two monitoring units are also connected to the control circuit;

[0015] The signal processing unit selects the target monitoring unit and the diagnostic output terminal according to the signal received by the function selection terminal, and the target monitoring unit is at least one of the at least two monitoring sub-units; wherein the at least two monitoring units include at least two of the current monitoring unit, the temperature monitoring unit, and the power supply voltage monitoring unit;

[0016] The power consumption of the at least two monitoring units in the bypass mode is lower than that in the normal working mode.

[0017] In another possible design of the first aspect, the switch circuit further includes a main power switch and a bypass switch, and the control circuit includes a logic control unit, a first drive unit, and a second drive unit;

[0018] The first end of the main power switch and the first end of the bypass switch are both connected to the power supply end or the power ground end, the second end of the main power switch and the second end of the bypass switch are both connected to the load output end, the control end of the main power switch is connected to the first drive unit, the control end of the bypass switch is connected to the second drive unit, the first drive unit and the second drive unit are also connected to the logic control unit, and the logic control unit is also connected to the diagnostic circuit;

[0019] When the intelligent electronic switch operates in a normal working mode, the logic control unit controls the main power switch tube to be turned on and conducted via the first driving unit, and controls the diagnostic circuit to operate in a first diagnostic state; when the intelligent electronic switch operates in a bypass mode, the logic control unit controls the bypass switch to be turned on and conducted via the second driving unit, and controls the diagnostic circuit to operate in a second diagnostic state.

[0020] Optionally, the main power switch tube is an N-type switch tube, and the bypass switch tube is a P-type transistor;

[0021] When the main power switch and the bypass switch are both connected between the power supply end and the load output end, the first driving unit includes a boost module and a driving module, the boost module is connected to the driving module, the driving module is connected to the control end of the main power switch, the boost module is used to increase the output voltage of the driving module, and the driving module is used to control the main power switch to turn on when the intelligent electronic switch works in the normal working mode.

[0022] In another possible design of the first aspect, the switch circuit includes a power switch, and the control circuit includes a logic control unit, a first drive unit, and a second drive unit;

[0023] The first end of the power switch is connected to the power supply end or the power ground end, the second end of the power switch is connected to the load output end, the control end of the power switch is connected to the first drive unit and the second drive unit, the first drive unit and the second drive unit are also connected to the logic control unit, and the logic control unit is also connected to the diagnostic circuit;

[0024] When the intelligent electronic switch operates in a normal working mode, the logic control unit drives the power switch to be turned on and controls the diagnostic circuit to operate in a first diagnostic state through the first driving unit. When the intelligent electronic switch operates in a bypass mode, the logic control unit drives the power switch to be turned on and controls the diagnostic circuit to operate in a second diagnostic state through the second driving unit.

[0025] In another possible design of the first aspect, the intelligent electronic switch further includes a protection circuit, the protection circuit is connected to the control circuit, and the protection circuit is used to protect the intelligent electronic switch;

[0026] In normal working mode, the control circuit also controls the protection circuit to operate in a first protection state; in bypass mode, the control circuit also controls the protection circuit to operate in a second protection state, wherein the power consumption of the protection circuit operating in the second protection state is less than the power consumption of the protection circuit operating in the first protection state, so as to reduce the power consumption of the protection circuit in bypass mode.

[0027] In a second aspect, the present application also 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, and the diagnostic output end is a diagnostic output pin.

[0028] In a third aspect, the present application further provides a chip product, comprising the intelligent electronic switch as described in 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, and the diagnostic output end is a diagnostic output pin. The power supply pin, the power ground pin, and the diagnostic output pin are located on a first integrated circuit chip, and the load output pin is located on a second integrated circuit chip.

[0030] In a third aspect, the present application further 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 diagnostic output terminal of the intelligent electronic switch.

[0032] The intelligent electronic switch, integrated circuit chip, chip product and automobile provided by the present application can work in different working modes according to the weight of the connected load, and control the working state of the internal functional circuit according to the load current size required to be provided or the working mode it is in. For example, the intelligent electronic switch may include a control circuit and a diagnostic circuit, so that in the normal working mode, the control circuit controls the diagnostic circuit to work in the first diagnostic state, and in the bypass mode, the control circuit controls the diagnostic circuit to work in the second diagnostic state. In this way, when the vehicle is in the parking mode, the intelligent electronic switch works in the bypass mode, and the power consumption of the diagnostic circuit when working in the second diagnostic state is less than the power consumption when working in the second diagnostic state, so that the self-consumption of the intelligent electronic switch in the bypass mode is less than the self-consumption of the self-consumption in the normal working mode. 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 is a schematic diagram of the structure of an electronic device provided in the first embodiment of the present application;

[0035] FIG. 2A to FIG. 2D , Figure 3A , Figure 3B Schematic diagrams of several possible structures of electronic devices provided in the third embodiment of the present application;

[0036] FIG. 4A to FIG. 4C Schematic diagrams of several structures of electronic devices provided in the fourth embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of a circuit structure of an electronic device provided in the fifth embodiment of the present application.

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In practical applications, the load types of intelligent electronic switches are diverse (for example, inductors, capacitors, resistors or a combination of the three) and the working environment is harsh, so the application end has particularly high requirements for its reliability, which requires the intelligent electronic switch to work in a normal working mode when there is a load current output. At this time, the functional circuit inside the intelligent electronic switch is in a normal working state, which makes the intelligent electronic switch have a problem of relatively high power consumption, wherein the functional circuit can be a diagnostic circuit for realizing a diagnostic function and / or a protection circuit for realizing a protection function, etc. In particular, when there are many similar intelligent electronic switches in an electronic device such as a car, the overall power consumption of the car will be relatively large, which will accelerate the consumption of the battery equipped in the car, resulting in a significant shortening of the battery life.

[0044] In view of the above problems, the inventors of the present application have found after 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, and the load current flowing through the intelligent electronic switch will be significantly reduced. In order to reduce the internal power consumption of the intelligent electronic switch, according to the working characteristics of the intelligent electronic switch, an intelligent electronic switch is proposed, which can work in different working modes. For example, in the normal working mode or the bypass mode, the intelligent electronic switch can also control the working state of the internal functional circuit according to the working mode it is in. For example, the intelligent electronic switch may include a control circuit and a diagnostic circuit, so that in the normal working mode, the control circuit controls the diagnostic circuit to work in the first diagnostic state, and in the bypass mode, the control circuit controls the diagnostic circuit to work in the second diagnostic state, wherein the power consumption of the diagnostic circuit when working in the second diagnostic state is less than the power consumption when working in the second diagnostic state. In this way, at least on the basis of the consistent working states of other circuits inside the intelligent electronic switch, 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.

[0045] Optionally, the self-consumption of the intelligent 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 intelligent electronic switch and increasing the standby time.

[0046] 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.

[0047] The present application embodiment provides an electronic device, the electronic device is, for example, a car, see Figure 1 , Figure 1: is a schematic diagram of the structure of the electronic device provided in the first embodiment of the present application. The electronic device includes a battery 10, a load 30, a microcontroller 40 and an intelligent electronic switch 20. Among them, the battery 10 is generally a storage battery, and the storage battery provides voltages such as 12V, 24V, 48V, 60V, or other voltages. Of course, the battery 10 can also be other types of batteries, such as lithium batteries, sodium batteries, etc. 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 an inductive load for one or more wiper systems. The capacitive load is, for example, a lighting element, such as a xenon arc lamp. The microcontroller is connected to the intelligent electronic switch 20 for controlling the intelligent electronic switch. Meanwhile, the intelligent electronic switch 20 feeds back its status and relevant parameter information, such as relevant parameter information of diagnosis and relevant parameter information of protection, to the microcontroller 40 for processing.

[0048] Exemplarily, in practical applications, the intelligent electronic switch 20 includes a control circuit 21 and a switch circuit 22, so that 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 can control the switch circuit to turn on when receiving an on control signal, and control the switch circuit to turn off when receiving an off control signal. Moreover, based on the switch state of the switch circuit and the working state of the functional circuits such as diagnosis and protection inside the intelligent electronic switch 20, the working mode of the intelligent electronic switch can be divided into a normal working mode, a bypass mode, a standby mode and a sleep mode. Among them, when the switch circuit is in the on-state and the functional circuits such as diagnosis and protection inside the intelligent electronic switch are working normally, at this time, the intelligent electronic switch is said to work in a normal working mode or an active mode. Usually, in the normal working mode, the intelligent electronic switch can provide a large load current according to the load demand. When the switch circuit is in the on state but the diagnostic and protection function circuits integrated in the intelligent electronic switch are not working or some modules in the function circuit are not working, the intelligent electronic switch is said to be working in bypass mode. Since the power consumed by the intelligent electronic switch is relatively low in bypass mode, the bypass mode can also be called low power mode. In bypass mode, the load current provided by the intelligent electronic switch is less than the load current provided when it is in normal working mode. When the switch circuit is in the off state but the diagnostic and protection function circuits in the intelligent electronic switch are in normal working state, the intelligent electronic switch is said to be working in standby mode. That is, at this time, the intelligent electronic switch has no load current output, but is in standby state. Once the on control signal is received, it can be directly converted to normal working mode. When the switch circuit is in the off state and the protection and diagnostic function circuits in the intelligent electronic switch are not working, the intelligent electronic switch is said to be working in dormancy mode or sleep mode. At this time, the power consumption of the intelligent electronic switch is the lowest.

[0049] It can be understood that the embodiments of the present application are mainly explained based on the application scenario in which the switch circuit is in the on-state, and therefore, the intelligent electronic switch operates in the normal working mode or the bypass mode. The difference between the intelligent electronic switch operating in the bypass mode and the normal working mode is mainly reflected in the different self-consumption of the intelligent electronic switch in the two modes, which is mainly reflected in the different working states of the functional circuits in the intelligent electronic switch, resulting in different power consumption of the functional circuits such as diagnosis and protection in the intelligent electronic switch, thereby achieving different self-consumption of the intelligent electronic switch.

[0050] This embodiment provides an intelligent electronic switch that can operate in bypass mode and normal working mode. Figure 1As shown, the intelligent electronic switch 20 may include a power supply terminal VBAT, a power ground terminal GND, a load output terminal OUT, a switch circuit 22 and a control circuit 21 .

[0051] The power supply terminal VBAT and the power ground terminal GND are used to connect to the battery 10. 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. The load output terminal OUT is used to connect to the load 30 and one end of the switch circuit 22. The other end of the switch circuit 22 is connected to the power supply terminal VBAT or the power ground terminal GND. The switch circuit 22 is also connected to the control circuit 21, and the control circuit 21 is used to control the switch circuit 22 to turn on or off. In a possible design, as Figure 1 As shown, one end of the switch circuit 22 is connected to the load output terminal OUT, and the other end thereof is connected to the power supply terminal VBAT. 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. In other possible designs of the present application, one end of the switch circuit 22 is connected to the load output terminal OUT, and the other end thereof is connected to the power ground terminal GND. 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.

[0052] Continue to refer to Figure 1 As shown, in the embodiment of the present application, the intelligent electronic switch 20 further includes 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 can diagnose the state of the intelligent electronic switch 20.

[0053] Optionally, when the intelligent electronic switch 20 is in normal working mode and bypass mode, the switch circuit 22 is in an on state. In normal working mode, the control circuit 21 controls the diagnostic circuit 23 to work in a first diagnostic state. In bypass mode, the control circuit 21 controls the diagnostic circuit 23 to work in a second diagnostic state. The power consumption of the diagnostic circuit 23 working in the second diagnostic state is less than that of the diagnostic circuit 23 working in the first diagnostic state.

[0054] Exemplarily, the intelligent electronic switch 20 may further include an input terminal Input, which may be externally connected to a microcontroller 40 through the input terminal Input, and control the switch state of the switch circuit 22 based on a switch control signal (Input signal) received from the microcontroller 40. For example, when the switch control signal received by the control circuit 21 is an on control signal on, the control circuit 21 controls the switch circuit 22 to turn on, and when the switch control signal received is an off control signal off, the control circuit 21 controls the switch circuit 22 to turn off.

[0055] In this embodiment, the intelligent electronic switch 20 has a diagnostic output terminal CS and an internally integrated diagnostic circuit 23. The diagnostic output terminal CS can be internally connected to the diagnostic circuit 23 and externally connected to the microcontroller 40. In this way, 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. In this way, the microcontroller 40 can diagnose the state of the intelligent electronic switch 20 based on the received parameter information.

[0056] 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 CS 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.

[0057] Optionally, in actual applications, in order to meet the working requirements and low power consumption requirements of the load, the working mode of the intelligent electronic switch 20 can be set, and then the working state of the diagnostic circuit 23 can be controlled in different working modes. For example, in the normal working mode, the diagnostic circuit 23 is controlled to work in the first diagnostic state, and in the bypass mode, the diagnostic circuit 23 is controlled to work in the second diagnostic state, and the second diagnostic state is different from the first diagnostic state. For example, when the diagnostic circuit 23 works in the first diagnostic state, one or more diagnostic units included therein are in normal operation, and when the diagnostic circuit 23 works in the second diagnostic state, at least one of the diagnostic units included therein is in a non-working state, so that 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.

[0058] 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.

[0059] 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 Metal-Oxide-Semiconductor Field-Effect Transistor, NMOS FET, NMOS tube), a PMOS tube, a junction field effect transistor (Junction Field Effect Transistor, JFET) or an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, 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, such as 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.

[0060] 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.

[0061] Optional, in Figure 1 In the schematic diagram shown, the connection relationship between the control circuit 21, the diagnostic circuit 23, etc. 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, the diagnostic circuit 23 and other circuits. In other embodiments, the power supply unit may not be provided inside the intelligent electronic switch 20, in which 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 control circuit 21, the diagnostic circuit 23 and other circuits inside the intelligent electronic switch 20.

[0062] In the embodiment of the present application, the intelligent electronic switch includes a power supply terminal, a power ground terminal, a load output terminal, a control circuit and a switch circuit, and also includes a diagnostic circuit and a diagnostic output terminal. The diagnostic circuit is connected to the control circuit and the diagnostic output terminal. The diagnostic circuit is used to collect parameter information of the intelligent electronic switch and output it to the microcontroller via the diagnostic output terminal, so that the microcontroller can diagnose the state of the intelligent electronic switch. Moreover, when the intelligent electronic switch is in the normal working mode and the bypass mode, the switch circuit is in the on-state. In the normal working mode, the control circuit controls the diagnostic circuit to work in the first diagnostic state. In the bypass mode, the control circuit controls the diagnostic circuit to work in the second diagnostic state. The power consumption of the diagnostic circuit working in the second diagnostic state is less than the power consumption of the diagnostic circuit working in the first diagnostic state. In this technical solution, when the intelligent 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 intelligent electronic switch. On the basis of ensuring the normal operation of the load, the self-consumption of the intelligent electronic switch is effectively reduced, the battery life of the battery connected to the intelligent electronic switch is extended, and the application experience is improved.

[0063] Optionally, the first embodiment generally introduces the intelligent electronic switch 20, and the following uses different embodiments to explain the specific implementations of the diagnostic circuit 23, the control circuit 21, the switch circuit 22, etc. in the intelligent electronic switch 20. It can be understood that the following embodiments are based on the above Figure 1 The principle is explained based on the illustrated embodiment (the switch circuit 22 is connected as a high-side switch). The implementation principle of the switch circuit 22 being connected as a low-side switch is similar and will not be described in detail in this embodiment.

[0064] In the second embodiment of the present application, since the intelligent electronic switch 20 usually has a lighter load when working in the bypass mode, the current flowing through the switch circuit 22 is usually small at this time, and the possibility of abnormal current, abnormal temperature, etc. in the intelligent electronic switch 20 is relatively low. Therefore, under the condition that the switch circuit 22 is in the on state, the intelligent electronic switch 20 can control the diagnostic circuit 23 to stop working in the bypass mode, that is, in the bypass mode, the diagnostic circuit 23 stops working, so that the diagnostic circuit 23 does not consume power. In this way, the intelligent electronic switch 20 at least reduces the power consumption of the diagnostic circuit 23 in the bypass mode, thereby saving the power consumption of the intelligent electronic switch 20.

[0065] FIG. 2A to FIG. 2D , Figure 3A , Figure 3B Schematic diagrams of several possible structures of electronic devices provided in the third embodiment of the present application. Figure 2AAs shown, in this embodiment, the intelligent electronic switch 20 further includes a diagnosis enable terminal SEN, the diagnostic circuit 23 includes a signal processing unit 231 and a monitoring unit 230, the diagnosis enable terminal SEN is connected to the signal processing unit 231, the signal processing unit 231 is also connected to the monitoring unit 230, the monitoring unit 230 is also connected to the control circuit 21, the monitoring unit 230 is used to collect electrical parameters of the intelligent electronic switch 20, and the signal processing unit 231 connects the monitoring unit 230 and the diagnostic output terminal CS when the diagnosis enable terminal SEN receives a first level signal.

[0066] In the normal working mode, the monitoring unit 230 works in the first monitoring state; in the bypass mode, the monitoring unit 230 works in the second monitoring state, and the power consumption of the monitoring unit 230 in the second monitoring state is less than that in the first monitoring state.

[0067] In an embodiment of the present application, in order to meet the working requirements and low power consumption requirements of the load, the working state of the monitoring unit 230 in the diagnostic circuit 23 can be controlled according to the working mode of the intelligent electronic switch 20. For example, in the normal working mode, the monitoring unit 230 in the diagnostic circuit 23 is controlled to work in the first monitoring state, and in the bypass mode, the monitoring unit 230 in the diagnostic circuit 23 is controlled to work in the second monitoring state, and the second monitoring state is different from the first monitoring state. For example, when the monitoring unit 230 works in the first monitoring state, one or more monitoring functions included in it are activated, and when the monitoring unit 230 works in the second monitoring state, at least one of the monitoring functions included in it is not activated, so that the power consumption of the monitoring unit 230 when working in the second monitoring state is less than the power consumption when working in the first monitoring state, so the power consumption of the diagnostic circuit 23 when working in the second diagnostic state is less than the power consumption when working in the first diagnostic state.

[0068] Exemplarily, in this embodiment, the monitoring unit 230 is connected to the control circuit 21, and can work normally or stop working or work in different states such as energy-saving state under the control of the control circuit 21. In different working states, the power consumption of the monitoring unit 230 is different. For example, in the normal working mode, the monitoring unit 230 works normally; in the bypass mode, the monitoring unit 230 stops working or works in the energy-saving state (periodic work or intermittent work).

[0069] For example, refer to Figure 2C , Figure 2D , Figure 3A , Figure 3BAs shown, the monitoring unit 230 may include at least one of a current monitoring unit 232, a temperature monitoring unit 234, and a power supply voltage monitoring unit 235. Accordingly, the electrical parameters of the intelligent electronic switch 20 include the output current of the switch circuit 22 (the current flowing through the switch circuit), the temperature of the switch circuit 22, and the voltage of the power supply terminal VBAT.

[0070] As an example, the monitoring unit 230 includes a current monitoring unit 232, which is respectively connected to the signal processing unit 231 and the control circuit 21; in a first monitoring state, the current monitoring unit 232 works normally; in a second monitoring state, the current monitoring unit 232 stops working or works in energy-saving mode.

[0071] In this possible implementation, the current monitoring unit 232 is controlled to work differently in the first monitoring state and the second monitoring state, so that the power consumption when it works in different monitoring states is different. For example, since the power consumption of the current monitoring unit 232 in normal operation is greater than the power consumption when it is not working or working intermittently (periodically), the power consumption of the current monitoring unit 232 in the second monitoring state is less than the power consumption when it works in the first monitoring state.

[0072] Typically, in order to accurately control the current output of the switch circuit 22, the external device may send an enable signal of the diagnostic circuit 23, for example, a first level signal, to the intelligent electronic switch 20 through the diagnostic enable terminal SEN, so that when the signal processing unit 231 receives the first level signal, the diagnostic output terminal CS and the current monitoring unit 232 are connected.

[0073] Optionally, in the normal working mode, since the current range output by the intelligent electronic switch 20 to the load 30 through the switch circuit 22 and the load output terminal OUT is relatively wide, the diagnostic enable terminal SEN usually receives a first level signal for connecting the diagnostic output terminal CS with the current monitoring unit 232, and in the normal working mode, the control circuit 21 can control the current monitoring unit 232 to be in a normal working state, so that the current monitoring unit 232 can collect the output current of the intelligent electronic switch 20 and output a current sampling value, and the current sampling value will be output to the microcontroller 40 through the signal processing unit 231 and the diagnostic output terminal CS, so that the microcontroller 40 can determine the state of the intelligent electronic switch 20 according to the current sampling value.

[0074] Accordingly, in bypass mode, the load connected to the load output terminal OUT is usually light. At this time, the current output to the load by the intelligent electronic switch 20 through the switch circuit 22 and the load output terminal OUT is relatively small, and the possibility of a load short circuit in the intelligent electronic switch 20 and an abnormality in the output current of the switch circuit 22 is small. Therefore, in bypass mode, the control circuit 21 can control the current monitoring unit 232 to stop working or work in an energy-saving state. The current monitoring unit 232 can work in an energy-saving state by periodically working or being triggered to start working when certain preset conditions are met, so that the power consumption of the current monitoring unit 232 when working in the energy-saving state is less than the power consumption when working in the normal working mode.

[0075] In a possible design of the embodiment of the present application, in the above Figure 2A Based on the embodiment shown, refer to Figure 2B As shown, the diagnostic circuit 23 further includes an abnormality processing unit 233, which is connected to the signal processing unit 231 and the control circuit 21. The abnormality processing unit 233 is used to generate abnormal information when an abnormality occurs in the intelligent electronic switch 20. The signal processing unit 231 connects the monitoring unit 230 and the diagnostic output terminal CS when no abnormal information is received, and connects the abnormality processing unit 233 and the diagnostic output terminal CS when abnormal information is received.

[0076] Optionally, in the normal working mode, the exception handling unit 233 works normally; in the bypass mode, the exception handling unit 233 stops working.

[0077] Exemplarily, in the normal working mode, the control circuit 21 can control the abnormal processing unit 233 to work normally to detect whether the intelligent electronic switch 20 has an abnormality, for example, detecting whether the load is open when the switch circuit 22 is in the off state, and detecting whether the switch circuit 22 is turned off due to abnormal factors when the switch circuit 22 is in the on state. The abnormal factor can be any one of overtemperature, overcurrent and other abnormalities.

[0078] Optionally, the abnormality processing unit 233 generates abnormality information when detecting an abnormality in the intelligent electronic switch 20 , so that the signal processing unit 231 connects the diagnostic output terminal CS with the abnormality processing unit 233 , thereby transmitting the abnormality information to the diagnostic output terminal CS through the signal processing unit 231 .

[0079] It is understandable that in practical applications, the exception handling unit 233 may also have various variations. For example, the exception handling unit 233 may include a module for generating exception information and a unit for detecting whether a switch circuit is abnormal.

[0080] As another example, in the bypass mode, in order to reduce the self-consumption of the intelligent electronic switch 20, the control circuit 21 can control the abnormality processing unit 233 to stop working, or control the abnormality processing unit 233 to work periodically or intermittently to reduce the self-consumption of the intelligent electronic switch 20.

[0081] Optional, in the above Figure 2A or Figure 2B Based on the embodiment shown, refer to Figure 2C , Figure 2D , Figure 3A , Figure 3B When the intelligent electronic switch includes at least two monitoring units, the intelligent electronic switch also includes a function selection end; the function selection end and the at least two monitoring units are connected to the signal processing unit, and the at least two monitoring units are also connected to the control circuit; accordingly, the signal processing unit selects the target monitoring unit and the diagnostic output end according to the signal received by the function selection end, and the target monitoring unit is at least one of the at least two monitoring sub-units; optionally, the at least two monitoring units include at least two of a current monitoring unit, a temperature monitoring unit, and a power supply voltage monitoring unit; the power consumption of the at least two monitoring units in the bypass mode is lower than that in the normal working mode.

[0082] For example, Figure 2C As shown, in the intelligent electronic switch 20 provided in this embodiment, the diagnostic circuit 23 includes a current monitoring unit 232 and a first monitoring unit 23X, and the intelligent electronic switch 20 also includes a first function selection terminal SEL1; the first function selection terminal SEL1 and the first monitoring unit 23X are both connected to the signal processing unit 231, and the first monitoring unit 23X is also connected to the control circuit 21.

[0083] When the diagnosis enable terminal SEN receives a first level signal, if the first function selection terminal SEL1 receives a second level signal, the signal processing unit 231 switches on the current monitoring unit 232 and the diagnosis output terminal CS, and if the first function selection terminal SEL1 receives a first level signal, the signal processing unit 231 switches on the first monitoring unit 23X and the diagnosis output terminal CS. The power consumption of the first monitoring unit 23X in the normal working mode is greater than the power consumption in the bypass mode.

[0084] Optionally, in this embodiment, the first monitoring unit 23X may be used to collect the temperature of the switch circuit 22, or to collect the power supply voltage information of the intelligent electronic switch 20, which may be determined according to actual needs and will not be elaborated herein.

[0085] In this embodiment, when the diagnostic enable terminal SEN receives a first level signal, the diagnostic circuit 23 will activate (or enable) the output function of the diagnostic output terminal CS, so that the signal processing unit 231 can determine the connected unit based on the signal received by the first function selection terminal SEL1. For example, when the first function selection terminal SEL1 receives a second level signal (for example, a low level signal, that is, SEL1=L), the signal processing unit 231 can select the current monitoring unit 232 and the diagnostic output terminal CS, so that by default, the diagnostic output terminal CS outputs the current information of the switch circuit 22 collected by the current monitoring unit 232, and when the switch circuit 22 is turned off due to an abnormality, the signal processing unit 231 will connect the abnormality processing unit 233 with the diagnostic output terminal CS based on the abnormal information output by the abnormality processing unit. For another example, when the first function selection terminal SEL1 receives a first level signal (for example, a high level signal, that is, SEL1=H), the signal processing unit 231 can select the first monitoring unit 23X and the diagnostic output terminal CS.

[0086] Optionally, the control circuit 21 can control the working state of the first monitoring unit 23X based on the working mode of the intelligent electronic switch 20, so that the power consumption of the first monitoring unit 23X in the bypass mode is less than the power consumption in the normal working mode. For example, in the normal working mode, the first monitoring unit 23X works normally, and in the bypass mode, the first monitoring unit 23X stops working or works in an energy-saving state, so that the self-consumption of the intelligent electronic switch 20 in the bypass mode can be less than the self-consumption of the intelligent electronic switch 20 in the normal working mode.

[0087] Optional, such as Figure 2D As shown, in the intelligent electronic switch 20, the first monitoring unit 23X includes a temperature monitoring unit 234 and a power supply voltage monitoring unit 235. Correspondingly, the intelligent electronic switch 20 also includes a second function selection terminal SEL0. The second function selection terminal SEL0, the temperature monitoring unit 234, and the power supply voltage monitoring unit 235 are all connected to the signal processing unit 231. The temperature monitoring unit 234 and the power supply voltage monitoring unit 235 are also connected to the control circuit 21.

[0088] Optionally, in this embodiment, when the diagnostic enable terminal SEN receives a first level signal and the first function selection terminal SEL1 receives a first level signal, if the second function selection terminal SEL0 receives a second level signal, the signal processing unit 231 turns on the temperature monitoring unit 234 and the diagnostic output terminal CS; if the second function selection terminal SEL0 receives a first level signal, the signal processing unit 231 turns on the power supply voltage monitoring unit 235 and the diagnostic output terminal CS.

[0089] In the normal working mode, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 both work normally. In the bypass mode, at least one of the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 stops working or works in a power saving state.

[0090] Optionally, in this embodiment, the first monitoring unit 23X may specifically include a temperature monitoring unit 234 and a power supply voltage monitoring unit 235, the temperature monitoring unit 234 may collect temperature information of the switch circuit 22, and the power supply voltage monitoring unit 235 may collect power supply voltage information of the intelligent electronic switch 20, that is, voltage information of the power supply terminal VBAT. In the normal working mode, the control circuit 21 may control the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to be in a normal working state, so that the signal processing unit 231 in the diagnostic circuit 23 may selectively connect the temperature monitoring unit 234 and the diagnostic output terminal CS or the power supply voltage monitoring unit 235 and the diagnostic output terminal CS based on the second function selection terminal SEL0 receiving a level signal. For example, when the second function selection terminal SEL0 receives a second level signal (e.g., a low level signal, i.e., SEL0=L), the signal processing unit 231 selects the temperature monitoring unit 234 and the diagnostic output terminal CS, so that the temperature monitoring unit 234 can output the collected temperature information of the switch circuit 22 to the microcontroller 40 through the signal processing unit 231 and the diagnostic output terminal CS. When the second function selection terminal SEL0 receives a first level signal (for example, a high level signal, i.e., SEL0=H), the signal processing unit 231 selects the power supply voltage monitoring unit 235 and the diagnostic output terminal CS, so that the power supply voltage monitoring unit 235 can output the collected information of the power supply terminal VBAT to the microcontroller 40 through the signal processing unit 231 and the diagnostic output terminal CS.

[0091] In bypass mode, since the load of the intelligent electronic switch 20 is relatively light, the power consumption of the intelligent electronic switch 20 can be reduced by controlling at least one of the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to stop working or work in an energy-saving state.

[0092] It can be understood that in the embodiments of the present application, the diagnostic circuit 23 may simultaneously include a current monitoring unit 232, an exception handling unit 233, a temperature monitoring unit 234, and a power supply voltage monitoring unit 235, etc. However, when the diagnostic enable terminal SEN receives a first level signal (enable signal), at the same time, the signal processing unit 231 will only connect to one monitoring unit according to the level signal received by the first function selection terminal SEL1 and the level signal received by the second function selection terminal SEL0, that is, the diagnostic output terminal CS can only output one type of monitoring information at the same time.

[0093] Optional, in Figure 2BBased on the embodiment shown, Figure 3A As shown, the intelligent electronic switch 20 further includes a first function selection terminal SEL1, and the monitoring unit includes a signal monitoring unit 23A, a current monitoring unit 232, and a temperature monitoring unit 234. The signal monitoring unit 23A is connected to the first function selection terminal SEL1, the signal processing unit 231, the current monitoring unit 232, and the temperature monitoring unit 234, respectively, and the current monitoring unit 232 and the temperature monitoring unit 234 are also connected to the control circuit 21.

[0094] In this possible design, the signal monitoring unit 23A is used to connect the current monitoring unit 232 and the signal processing unit 231 when the first function selection terminal SEL1 receives a second level signal, and to connect the temperature monitoring unit 234 and the signal processing unit 231 when the first function selection terminal SEL1 receives a first level signal.

[0095] In the first monitoring state, both the current monitoring unit 232 and the temperature monitoring unit 234 work normally; in the second monitoring state, at least one of the current monitoring unit 232 and the temperature monitoring unit 234 stops working or works in energy-saving mode.

[0096] In this possible design, the monitoring unit 230 may include a signal monitoring unit 23A, a current monitoring unit 232, and a temperature monitoring unit 234. The current monitoring unit 232 may collect current information of the switch circuit 22, and the temperature monitoring unit 234 may collect temperature information of the switch circuit 22. In the normal working mode, the control circuit 21 may control the current monitoring unit 232 and the temperature monitoring unit 234 to be in a normal working state, so that the signal monitoring unit 23A may selectively connect the temperature monitoring unit 234 and the signal processing unit 231 or the temperature monitoring unit 234 and the signal processing unit 231 based on the level signal received by the first function selection terminal SEL1. For example, when the first function selection terminal SEL1 receives a second level signal (e.g., a low level signal, i.e., SEL0=L), the signal monitoring unit 23A selects the current monitoring unit 232 and the signal processing unit 231, so that the current monitoring unit 232 may output the collected current information of the switch circuit 22 to the microcontroller through the signal monitoring unit 23A, the signal processing unit 231, and the diagnostic output terminal CS. When the first function selection terminal SEL1 receives a first level signal (for example, a high level signal, i.e., SEL0=H), the signal monitoring unit 23A selects the temperature monitoring unit 234 and the signal processing unit 231, so that the temperature monitoring unit 234 can output the collected temperature information of the switching circuit 22 to the microcontroller through the signal monitoring unit 23A, the signal processing unit 231, and the diagnostic output terminal CS.

[0097] In bypass mode, since the load of the intelligent electronic switch 20 is relatively light, the power consumption of the intelligent electronic switch 20 can be reduced by controlling at least one of the current monitoring unit 232 and the temperature monitoring unit 234 to stop working or work in an energy-saving state. Therefore, when the monitoring unit 230 works in the first monitoring state, the control circuit 21 controls the current monitoring unit 232 and the temperature monitoring unit 234 to work normally; and when the monitoring unit 230 works in the second monitoring state, the control circuit 21 controls at least one of the current monitoring unit 232 and the temperature monitoring unit 234 to stop working or work in an energy-saving mode, so as to reduce the power consumption of the monitoring unit when working in the second monitoring state.

[0098] In another possible design, for example, in the above Figure 2B Based on the embodiment shown, refer to Figure 3B As shown, the intelligent electronic switch 20 further includes a first function selection terminal SEL1 and a second function selection terminal SEL0 . At this time, the monitoring unit 230 includes a signal monitoring unit 23A, a current monitoring unit 232 , a temperature monitoring unit 234 and a power supply voltage monitoring unit 235 .

[0099] Reference Figure 3B As shown, the signal monitoring unit 23A is respectively connected to the first function selection terminal SEL1, the second function selection terminal SEL0, the signal processing unit 231, the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235, and the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 are also connected to the control circuit 21. The signal monitoring unit 23A is used to select a sub-unit from the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to be connected to the signal monitoring unit 23A according to the signal received from the first function selection terminal SEL1 and the second function selection terminal SEL0; wherein, in the first monitoring state, the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 all work normally; in the second monitoring state, at least one of the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 stops working or works in an energy-saving state (periodic work or intermittent work).

[0100] Exemplarily, in this embodiment, the monitoring unit 230 may include a signal monitoring unit 23A, a current monitoring unit 232, a temperature monitoring unit 234, and a power supply voltage monitoring unit 235. The current monitoring unit 232 may collect current information of the switch circuit 22, the temperature monitoring unit 234 may collect temperature information of the switch circuit 22, and the power supply voltage monitoring unit 235 may collect power supply voltage information of the intelligent electronic switch 20, that is, voltage information of the power supply terminal VBAT. In the normal working mode, the control circuit 21 may control the current monitoring unit 232, the temperature monitoring unit 234, and the power supply voltage monitoring unit 235 to be in a normal working state, but the signal monitoring unit 23A will selectively connect the current monitoring unit 232 and the signal processing unit 231 or the temperature monitoring unit 234 and the signal processing unit 231 or the temperature monitoring unit 234 and the signal processing unit 231 based on the level signal received by the first function selection terminal SEL1 and the second function selection terminal SEL0.

[0101] For example, when the first function selection terminal SEL1 receives a second level signal (e.g., a low level signal, i.e., SEL0=L), regardless of whether the second function selection terminal SEL0 receives a first level signal or a second level signal, the signal monitoring unit 23A switches on the current monitoring unit 232 and the signal processing unit 231, so that the current monitoring unit 232 can output the collected current information of the switch circuit 22 to the microcontroller 40 through the signal monitoring unit 23A, the signal processing unit 231, and the diagnostic output terminal CS. When the first function selection terminal SEL1 receives a first level signal (e.g., a high level signal, i.e., SEL0=H) and the second function selection terminal SEL0 receives a second level signal (e.g., a low level signal, i.e., SEL0=L), the signal monitoring unit 23A switches on the temperature monitoring unit 234 and the signal processing unit 231, so that the temperature monitoring unit 234 can output the collected temperature information of the switch circuit 22 to the microcontroller 40 through the signal monitoring unit 23A, the signal processing unit 231, and the diagnostic output terminal CS. When the first function selection terminal SEL1 receives a first level signal (for example, a high level signal, i.e., SEL0=H) and the second function selection terminal SEL0 receives a first level signal (for example, a high level signal, i.e., SEL0=H), the signal monitoring unit 23A selects the power supply voltage monitoring unit 235 and the signal processing unit 231, so that the power supply voltage monitoring unit 235 can output the collected voltage information of the power supply terminal VBAT to the microcontroller 40 through the signal monitoring unit 23A, the signal processing unit 231, and the diagnostic output terminal CS.

[0102] In bypass mode, since the load of the intelligent electronic switch 20 is relatively light, the power consumption of the intelligent electronic switch 20 can be reduced by controlling at least one of the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to stop working or to work periodically. Therefore, when the monitoring unit works in the first monitoring state, the control circuit 21 controls the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to work normally; and when the monitoring unit works in the second monitoring state, the control circuit 21 controls at least one of the current monitoring unit 232, the temperature monitoring unit 234 and the power supply voltage monitoring unit 235 to stop working or to work periodically, so as to reduce the power consumption of the monitoring unit when working in the second monitoring state.

[0103] In the embodiments of the present application, the specific implementation of the diagnostic circuit is exemplified in various ways, illustrating from different perspectives that the power consumption of the diagnostic circuit in the second diagnostic state is less than that in the first diagnostic state, thereby reducing the self-consumption of the intelligent electronic switch in the bypass mode.

[0104] Optionally, the above embodiments explain the diagnostic circuit 23 and the like, and the following explains the implementation principle of the switch circuit 22 and the control circuit 21 through specific embodiments.

[0105] As an example, FIG. 4A to FIG. 4C Schematic diagrams of several structures of electronic devices provided in the fourth embodiment of the present application. Figure 4A and Figure 4B As shown, in this embodiment, the switch circuit 22 further includes a main power switch Q1 and a bypass switch Q2 , and the control circuit 21 includes a logic control unit 211 , a first drive unit 212 , and a second drive unit 213 .

[0106] Among them, 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, the control end of the main power switch Q1 is connected to the first driving unit 212, the control end of the bypass switch Q2 is connected to the second driving unit 213, the first driving unit 212 and the second driving unit 213 are also connected to the logic control unit 211, and the logic control unit 211 is also connected to the diagnostic circuit 23.

[0107] In one 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 as high-side switches. Figure 4A and Figure 4BIn 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, which is not limited in this embodiment.

[0108] In the embodiment of the present application, when the intelligent electronic switch 20 operates in the normal working mode, the logic control unit 211 controls the main power switch Q1 to be turned on and conducted via the first driving unit 212, and controls the diagnostic circuit 23 to operate in the first diagnostic state; when the intelligent electronic switch 20 operates in the bypass mode, the logic control unit 211 controls the bypass switch Q2 to be turned on and conducted via the second driving unit 213, and controls the diagnostic circuit 23 to operate in the second diagnostic state.

[0109] In this embodiment, two driving modules are provided in the control circuit 21 to control the switch states of the main power switch Q1 and the bypass switch Q2, so that the control branches of the main power switch Q1 and the bypass switch Q2 can be isolated to avoid confusion in the control logic of the main power switch Q1 and the bypass switch Q2. It can be understood that in the normal working mode, when the logic control unit 211 controls the main power switch Q1 to turn on, the bypass switch Q2 is controlled to turn off, and the control diagnosis circuit 23 is controlled to work in the first diagnosis state, while in the bypass mode, when the logic control unit 211 controls the bypass switch Q2 to turn on, the main power switch Q1 is controlled to turn off, and the control diagnosis circuit 23 is controlled to work in the second diagnosis state.

[0110] In this embodiment, the area of ​​the main power switch Q1 is larger than the area of ​​the bypass switch Q2, and the maximum current allowed to flow through the main power switch Q1 when the main power switch Q1 is turned on is larger than the maximum current allowed to flow through the bypass switch Q2 when the bypass switch Q2 is turned on.

[0111] For example, continue to refer to Figure 4A and Figure 4B 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, and when the main power switch Q1 and the bypass switch Q2 are both connected between the power supply terminal VBAT and the load output terminal OUT, the first driving unit 212 includes a boost module (such as a charge pump, etc.) and a driving module, the boost module is connected to the driving module, the driving module is connected to the control end of the main power switch Q1, the boost module is used to increase the output voltage of the driving module, and the driving module is used to control the main power switch Q1 to turn on when the intelligent electronic switch 20 works in the normal working mode.

[0112] For example, refer to Figure 4AAs shown, the boost module is implemented in the form of a charge pump. For example, the charge pump includes an oscillator, a P-type MOS tube CP_P1, an N-type MOS tube CP_N1, capacitors C1 and C2, and diodes D1 and D2, wherein the control ends of the P-type MOS tube CP_P1 and the N-type MOS tube CP_N1 are connected to the oscillator, the drain of the P-type MOS tube CP_P1 is connected to the power supply end VBAT, its source is connected to the source of the N-type MOS tube CP_N1 and the connection point is A1, the drain of the N-type MOS tube CP_N1 is connected to the first power supply end Vs, based on the voltage resistance of the P-type MOS tube CP_P1 and the N-type MOS tube 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.

[0113] Optional, continue to refer to Figure 4A As shown, the driving module 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 211, 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 211 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.

[0114] Exemplarily, the second driving unit 213 is mainly used to drive the bypass switch Q2 to turn on, so that the intelligent electronic switch 20 provides a load current path through the bypass switch Q2. Figure 4AIn the illustrated embodiment, when the bypass switch Q2 is a P-type switch tube, the second driving unit 213 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 211, 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 211 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 211 and the switch X1 or the switch X2. In this way, when the logic control unit 211 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.

[0115] It can be understood that when the main power switch Q1 and the bypass switch Q2 are connected as a high-side switch, in view of the conduction characteristics of the N-type MOS tube, the voltage output by the first driving unit 212 can be higher than the voltage of the power supply terminal VBAT through the boosting effect of the boost module, so that the gate-source voltage signal of the N-type MOS tube meets 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 213 that drives the P-type MOS tube to turn on does not need a boost module, etc., so that the power consumption of the second driving unit 213 is lower than that of the first driving unit 212.

[0116] As an example, continue to refer to Figure 4B As shown, in this embodiment, the second driving unit 213 may include a transistor M1 and a constant current source I1, the transistor M1 and the bypass switch Q2 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 bypass switch Q2, the other end is connected to the power supply terminal VBAT or the power ground terminal GND, and the control end is connected to the logic control unit 211, the drain of the transistor M1 is connected to the control end, and the control end is also connected to the control end of the bypass switch Q2. At this time, in the bypass mode, the logic control unit 211 controls the second driving unit 213 to work, so as to control the bypass switch Q2 to turn on and conduct through the second driving unit 213, and the current value flowing through the bypass switch Q2 is less than or equal to the first current limiting value set by the second driving unit 213, and 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 switch tube, and the first current limiting value is less than the maximum current value flowing through the switch circuit 22 in the normal working mode.

[0117] Optionally, in the present application, the value range of the first current limit value may be 1uA to 100uA. For example, the first current limit value may be 10uA. It is understandable that the first value range may also be other values, which are not limited in the present embodiment. Figure 4A The description in the illustrated embodiments is not limited here.

[0118] Optionally, the embodiments of the present application do not limit the method for controlling the enabling of the second drive unit 213. For instance, as an example, the constant current source I1 includes an enabling terminal. In the bypass mode, the logic control unit 211 can turn on the current limiting drive branch by controlling the enabling of the constant current source I1, thereby enabling the second drive unit 213 to operate. As another example, the current limiting drive branch may also include a second switch module (not shown). In the bypass mode, the logic control unit 211 can enable the second drive unit 213 to operate by controlling the second switch module to turn on.

[0119] It is understandable that in a specific implementation, the second driving unit 213 can also be implemented through other structures. For example, the second driving unit 213 can also include one or more mirror units, or the constant current source is replaced with a constant current source of other specifications and one or more mirror units, etc. Correspondingly, the connection relationship between the internal circuit elements of the second driving unit 213 can also be adjusted according to actual needs, etc. This embodiment does not limit the specific structure of the second driving unit 213.

[0120] In this embodiment, the second driving unit can set the maximum current value flowing through the bypass switch through the current source and the transistor. It limits the maximum current of the load current path on the basis of providing a load current path, which can reduce the possibility of the bypass switch being damaged by large current to a certain extent. Moreover, it has a simple structure and is easy to implement. Moreover, compared with the first driving unit, it has lower power consumption, which saves power consumption while meeting the load current requirements.

[0121] As another example, refer to Figure 4C As shown, in this embodiment, the switch circuit 22 includes a power switch Q, and the control circuit 21 includes a logic control unit 211 , a first drive unit 212 and a second drive unit 213 .

[0122] 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 212 and the second drive unit 213, the first drive unit 212 and the second drive unit 213 are also connected to the logic control unit 211, and the logic control unit 211 is also connected to the diagnostic circuit 23.

[0123] In this embodiment, when the intelligent electronic switch 20 operates in the normal working mode, the logic control unit 211 drives the power switch Q to turn on and conduct through the first driving unit 212 and controls the diagnostic circuit 23 to operate in the first diagnostic state. When the intelligent electronic switch 20 operates in the bypass mode, the logic control unit 211 drives the power switch Q to turn on and conduct through the second driving unit 213 and controls the diagnostic circuit 23 to operate in the second diagnostic state.

[0124] For example, in Figure 4C In the embodiment, the power switch Q is an N-type switch tube and the power switch Q is connected as a high-side switch, that is, the two ends of the power switch Q are respectively connected to the power supply terminal VBAT and the load output terminal OUT for explanation. Therefore, in this embodiment, referring to Figure 4C As shown, the first driving unit 212 may include at least a boost module (eg, a charge pump) and a driving module. The working principle of the driving unit 212 may refer to Figure 4A The description in the embodiment shown is not repeated here. Figure 4C As shown, the second driving unit 213 includes a first switch module k1, one end of which is connected to the gate of the power switch Q, and when the power switch Q is an N-type transistor, the other end is connected to the power supply terminal VBAT, and when the power switch Q is a P-type transistor, the other end is connected to the power ground terminal GND, and the control end is connected to the logic control unit 211.

[0125] When the power switch Q is in bypass mode and is an N-type transistor, the logic control unit 211 controls the first switch module k1 to be turned on, and connects the gate of the power switch Q to the power supply terminal, that is, connects the gate and drain of the power switch Q, so that the power switch Q can be configured in a diode connection manner, and the power switch Q can also be turned on to provide a load current path.

[0126] It can be understood that when the gate and drain of the power switch Q are connected, if the voltage at the load output terminal OUT is lower than the threshold voltage of the diode-configured power switch, the power switch Q is in the off state.

[0127] In this embodiment, in the bypass mode, if the power switch Q is an N-type MOS tube, when the first switch module k1 is closed, the gate voltage of the power switch is equal to the voltage of the power supply end, which can meet the condition for the power switch Q to be turned on. The power switch Q is turned on, and the current load path is turned on, which meets the requirement that the intelligent electronic switch 20 can continue to provide current to the load in the bypass mode. Since the power consumption of the first switch module k1 is much lower than the power consumption of the first drive unit 212, the self-consumption of the intelligent electronic switch 20 in the bypass mode is effectively reduced.

[0128] Similarly, when the power switch Q is a P-type MOS tube, by closing the first switch module k1, the gate voltage of the power switch is equal to the voltage of the power ground terminal GND, which can also meet the conditions for turning on the power switch Q, and the power switch Q is turned on.

[0129] It can be understood that this embodiment and Figure 4A , Figure 4B The difference shown is that Figure 4A and Figure 4B The switch circuit 22 in the embodiment is realized by the main power switch Q1 and the bypass switch Q2. Different switches are controlled to be turned on in the normal working mode and the bypass mode. This ensures that the conduction paths in the bypass mode and the normal working mode do not interfere with each other, thereby improving the control accuracy of the switch circuit 22. Figure 4C In the figure, the switch circuit 22 includes a power switch Q, that is, the intelligent electronic switch 20 provides current to the load by turning on the power switch Q in both the normal working mode and the bypass mode. However, the driver for turning on the power switch Q is different in different working modes, which can save the area of ​​the intelligent electronic switch 20 and reduce the cost.

[0130] Optionally, based on the above embodiment, Figure 5 Schematic diagram of a circuit structure of an electronic device provided in the fifth embodiment of the present application. Figure 5 As shown, the intelligent electronic switch 20 may further include a protection circuit 24, which is connected to the control circuit 21, and is used to protect the intelligent electronic switch 20. When the intelligent electronic switch 20 works in the normal working mode, the control circuit 21 controls the switch circuit 22 to be in the on-state and can also control the protection circuit 24 to work in the first protection state, and when the intelligent electronic switch 20 works in the bypass mode, the control circuit 21 controls the switch circuit 22 to be in the on-state and can also control the protection circuit 24 to work in the second protection state, wherein the power consumption of the protection circuit 24 working in the second protection state is less than the power consumption of the protection circuit 24 working in the first protection state, so as to reduce the power consumption of the protection circuit 24 in the bypass mode.

[0131] For example, the protection circuit 24 may include at least one of a current protection unit, a temperature protection unit, a voltage protection unit, and the like.

[0132] Among them, the current protection unit can trigger the current protection of the intelligent electronic switch 20 when the current flowing through the switch circuit 22 is abnormal. The current protection unit includes an overcurrent protection unit and / or a current limiting protection unit. The overcurrent protection unit outputs an overcurrent protection signal when it is determined that the current sampling value is greater than the overcurrent protection threshold, so as to trigger the control circuit 21 to drive the switch circuit 22 to shut down. The current limiting protection unit outputs a current limiting protection signal when it is determined that the current sampling value is greater than the current limiting protection threshold, so as to trigger the control circuit 21 to adjust the size of the control signal output to the control end of the switch circuit 22 to reduce the current flowing through the switch circuit 22, thereby making the current sampling value less than or equal to the current limiting protection threshold. Optionally, the power consumption of the current protection unit in the bypass mode is less than the power consumption in the normal working mode. For example, in the bypass mode, the current protection unit stops working.

[0133] The temperature protection unit is used to output a temperature protection signal when detecting a temperature anomaly of the switch circuit 22, so as to trigger temperature protection of the switch circuit 22. The power consumption of the temperature protection unit in the bypass mode is less than that in the normal working mode. For example, the temperature protection unit only collects the junction temperature of the switch circuit 22 in the bypass mode, and there is no need to set a temperature detection element at a position of the intelligent electronic switch far away from the switch circuit, that is, there is no need to perform dynamic temperature protection on the switch circuit (dynamic temperature protection means that when the temperature difference between the temperature at the switch circuit and the temperature at a position far away from the switch circuit is greater than a preset threshold, the switch circuit is controlled to be turned off), thus saving power consumption in the bypass mode.

[0134] The voltage protection unit is used to trigger voltage protection for the intelligent electronic switch 20 when it detects that the voltage of the power supply terminal VBAT is abnormal and outputs a voltage abnormality signal. The power consumption of the voltage protection unit in bypass mode is less than the power consumption in normal working mode. Optionally, the voltage protection unit may include an overvoltage protection unit and / or an undervoltage protection unit. The overvoltage protection unit is used to trigger overvoltage protection for the intelligent electronic switch 20 when it detects that the voltage of the power supply terminal VBAT is higher than the first voltage threshold. For example, when the voltage VBAT of the power supply terminal VBAT is greater than the first voltage threshold, the switch circuit 22 can be turned off by the control circuit 21 or the voltage of the power supply terminal VBAT can be pulled down by means of a voltage clamping circuit to reduce the voltage of the power supply terminal VBAT, thereby protecting the intelligent electronic switch 20 from being damaged by high voltage. The undervoltage protection unit is used to trigger undervoltage protection of the intelligent electronic switch 20 when it is detected that the voltage of the power supply terminal VBAT is lower than the second voltage threshold. For example, when the voltage VBAT of the power supply terminal VBAT is lower than the second voltage threshold, the intelligent electronic switch 20 can be prohibited from being used by turning off the switch circuit 22 through the control circuit 21, so as to improve the reliability of the intelligent electronic switch 20 when being used.

[0135] In practical applications, multiple protection units or one or more of the multiple protection units may be designed in the intelligent electronic switch 20 at the same time. For example, the intelligent electronic switch 20 may have a current protection unit, a temperature protection unit, an output short circuit protection unit, a voltage protection unit, etc., or may have only one or more of them. When at least two protection units are designed in the intelligent electronic switch 20 at the same time, in the bypass mode, at least one protection unit stops working or works in an energy-saving state to reduce the power consumption of the protection circuit, thereby reducing the self-consumption of the intelligent electronic switch 20.

[0136] Optionally, in other embodiments of the present application, continue to refer to Figure 5 As shown, the intelligent electronic switch 20 also includes a function terminal, which is connected to the control circuit 21; when the function terminal receives the first switching signal, the control circuit controls the intelligent electronic switch 20 to enter the bypass mode. The function terminal can be a terminal newly added to the intelligent electronic switch, or it can reuse the original terminal of the intelligent electronic switch 20. The number of the function terminals can be one, or two or more, which is not limited in the embodiments of the present application.

[0137] Exemplarily, the functional end includes a first functional end FU1 and a second functional end FU2, and the first functional end FU1 and the second functional end FU2 are both connected to the control circuit 21; the first switching signal includes a first signal and a second signal, and when the first functional end FU1 receives the first signal and the second functional end FU2 receives the 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 when it is in the normal working mode, and in the bypass mode and in the normal working mode, the switch circuit 22 is in an on state.

[0138] Exemplarily, 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 SEL1, the second function selection terminal SEL0, the diagnosis release terminal Fault and other terminals of the intelligent electronic switch 20.

[0139] As an example, the first function terminal FU1 can reuse the diagnostic enable terminal SEN, and the second function terminal FU2 can reuse the input terminal. 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. It is understood that in other embodiments of the present application, the first function terminal FU1 and / or the second function terminal FU2 can also be a newly added terminal of the intelligent electronic switch 20, or a combination of a newly added terminal and an original terminal, which are not limited in the embodiments of the present application.

[0140] Optional, see Figure 5 As shown, the intelligent electronic switch 20 can also 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.

[0141] 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.

[0142] It can be understood that other parts that are not detailed in one embodiment of the present application can be referred to the records in other embodiments of the present application and will not be repeated here.

[0143] 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, the load output terminal OUT is a load output pin, and the diagnostic output terminal CS is a diagnostic output pin.

[0144] 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.

[0145] 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.

[0146] 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 diagnostic output terminal CS is the diagnostic output pin, the power supply pin, the power ground pin, and the diagnostic output 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, first drive pins, etc., and the second integrated circuit chip also includes other pins, for example, second drive pins, wherein the first drive pin is respectively connected to the drive circuit and the second drive pin, 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.

[0147] 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 5 As shown, the automobile includes a battery 10 , a load 30 , a microcontroller 40 and an intelligent electronic switch 20 .

[0148] The microcontroller 40 is connected to the intelligent electronic switch 20 and is used 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 can be connected to the intelligent electronic switch 20 through the diagnostic output terminal CS to receive the parameter information of the intelligent electronic switch 20 through the diagnostic output terminal CS, and then control the intelligent electronic switch 20.

[0149] 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.

[0150] 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.

[0151] 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 switch circuit and a control circuit; The power supply end and the power ground end are used to be connected to a battery, the load output end is used to be connected to a load and one end of a switch circuit, the other end of the switch circuit is connected to the power supply end or the power ground end, the switch circuit is also connected to the control circuit, and the control circuit is used to control the switch circuit to be turned on or off; It also includes a diagnostic circuit and a diagnostic output terminal, wherein the diagnostic circuit is connected to the control circuit and the diagnostic output terminal, and the diagnostic circuit is used to collect parameter information of the intelligent electronic switch and output it to the microcontroller via the diagnostic output terminal, so that the microcontroller can diagnose the state of the intelligent electronic switch; When the intelligent electronic switch is in a normal working mode and a bypass mode, the switch circuit is in an on state. In the normal working mode, the control circuit controls the diagnostic circuit to work in a first diagnostic state. In the bypass mode, the control circuit controls the diagnostic circuit to work in a second diagnostic state. The power consumption of the diagnostic circuit working in the second diagnostic state is less than the power consumption of the diagnostic circuit working in the first diagnostic state.

2. The intelligent electronic switch according to claim 1, characterized in that: In bypass mode, the diagnostic circuit stops working.

3. The intelligent electronic switch according to claim 1, characterized in that: It also includes a diagnosis enabling end, the diagnosis circuit includes a signal processing unit and a monitoring unit, the diagnosis enabling end is connected to the signal processing unit, the signal processing unit is also connected to the monitoring unit, the monitoring unit is also connected to the control circuit, the monitoring unit is used to collect electrical parameters of the intelligent electronic switch, and the signal processing unit connects the monitoring unit and the diagnosis output end when the diagnosis enabling end receives a first level signal; In the normal working mode, the monitoring unit operates in a first monitoring state; In the bypass mode, the monitoring unit operates in a second monitoring state, and the power consumption of the monitoring unit in the second monitoring state is less than that in the first monitoring state.

4. The intelligent electronic switch according to claim 3, characterized in that: The diagnostic circuit further includes an abnormality processing unit, which is connected to the signal processing unit and the control circuit and is used to generate abnormality information when an abnormality occurs in the intelligent electronic switch. The signal processing unit connects the monitoring unit and the diagnostic output terminal when the abnormality information is not received, and connects the abnormality processing unit and the diagnostic output terminal when the abnormality information is received; In the normal working mode, the exception handling unit operates normally; In the bypass mode, the exception handling unit stops working or works in an energy-saving state.

5. The intelligent electronic switch according to claim 3 or 4, characterized in that: When the intelligent electronic switch includes at least two monitoring units, the intelligent electronic switch further includes a function selection terminal; the function selection terminal and the at least two monitoring units are connected to the signal processing unit, and the at least two monitoring units are also connected to the control circuit; The signal processing unit selects the target monitoring unit and the diagnostic output terminal according to the signal received by the function selection terminal, and the target monitoring unit is at least one of the at least two monitoring sub-units; wherein the at least two monitoring units include at least two of the current monitoring unit, the temperature monitoring unit, and the power supply voltage monitoring unit; The power consumption of the at least two monitoring units in the bypass mode is lower than that in the normal working mode.

6. The intelligent electronic switch according to any one of claims 1 to 4, characterized in that: The switch circuit further comprises a main power switch and a bypass switch, and the control circuit comprises a logic control unit, a first drive unit and a second drive unit; The first end of the main power switch and the first end of the bypass switch are both connected to the power supply end or the power ground end, the second end of the main power switch and the second end of the bypass switch are both connected to the load output end, the control end of the main power switch is connected to the first drive unit, the control end of the bypass switch is connected to the second drive unit, the first drive unit and the second drive unit are also connected to the logic control unit, and the logic control unit is also connected to the diagnostic circuit; When the intelligent electronic switch operates in a normal working mode, the logic control unit controls the main power switch tube to be turned on and conducted via the first driving unit, and controls the diagnostic circuit to operate in a first diagnostic state; when the intelligent electronic switch operates in a bypass mode, the logic control unit controls the bypass switch to be turned on and conducted via the second driving unit, and controls the diagnostic circuit to operate in a second diagnostic state.

7. The intelligent electronic switch according to any one of claims 1 to 4, characterized in that: The switch circuit includes a power switch, and the control circuit includes a logic control unit, a first drive unit and a second drive unit; The first end of the power switch is connected to the power supply end or the power ground end, the second end of the power switch is connected to the load output end, the control end of the power switch is connected to the first drive unit and the second drive unit, the first drive unit and the second drive unit are also connected to the logic control unit, and the logic control unit is also connected to the diagnostic circuit; When the intelligent electronic switch operates in a normal working mode, the logic control unit drives the power switch to be turned on and controls the diagnostic circuit to operate in a first diagnostic state through the first driving unit. When the intelligent electronic switch operates in a bypass mode, the logic control unit drives the power switch to be turned on and controls the diagnostic circuit to operate in a second diagnostic state through the second driving unit.

8. The intelligent electronic switch according to claim 1, characterized in that: It also includes a protection circuit, which is connected to the control circuit and is used to protect the intelligent electronic switch; In the normal working mode, the control circuit also controls the protection circuit to work in the first protection state; In bypass mode, the control circuit also controls the protection circuit to operate in a second protection state, wherein the power consumption of the protection circuit in the second protection state is less than that in the first protection state, so as to reduce the power consumption of the protection circuit in bypass mode.

9. An integrated circuit chip, characterized in that: The intelligent electronic switch comprises the intelligent electronic switch as claimed in 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, and the diagnostic output terminal is a diagnostic output 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, and the diagnostic output end is a diagnostic output pin. The power supply pin, the power ground pin, and the diagnostic output 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 diagnostic output terminal of the intelligent electronic switch.

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