Power supply circuit, chip, vehicle-mounted control equipment and motor vehicle

Abstract

The invention provides a power supply circuit, a chip, a vehicle-mounted control device and a motor vehicle, and the power supply circuit comprises a constant power supply module, a non-normal power supply module, a switch main control module, and an inverse proportion amplification circuit. The control end of the constant power supply module is connected with a power supply, the input end of the constant power supply module is connected with the power supply and the input end of the inverse proportion amplification circuit, and the output end of the constant power supply module is connected with a load; the control end of the non-common power supply module is connected with the output end of the inverse proportion amplification circuit, the input end of the non-common power supply module is connected with the power supply, and the output end of the non-common power supply module is connected with the load; the switch master control module controls the connection state of the power supply and the constant power supply module and / or the non-normal power supply module. The running state of the power supply circuit can be changed according to the current change caused by the change of the working state of the load, so that the energy consumption of the load is effectively reduced under the condition of ensuring that the load needs to maintain the power-on state all the time, and the energy consumption of the whole vehicle is further reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle power supply and distribution, and in particular to a power supply circuit, a chip, a vehicle-mounted control device, and a motor vehicle. Background Art

[0002] As vehicles develop towards intelligence and convenience, there are more and more smart devices, comfort devices and safety devices on the vehicles, which leads to a significant increase in the energy consumption of the entire vehicle.

[0003] In addition, some equipment on the vehicle needs to remain powered on all the time. We usually call these devices constant power loads. Constant power loads have working mode and sleep mode. The sleep mode only requires a small current to maintain. Therefore, when designing vehicle power distribution, how to reduce the energy consumption of these constant power loads and thereby reduce the overall energy consumption of the vehicle and protect the vehicle's electrical components is a technical problem that urgently needs to be solved. Summary of the invention

[0004] The embodiments of the present disclosure at least provide a power supply circuit, a chip, a vehicle-mounted control device and a motor vehicle.

[0005] In a first aspect, an embodiment of the present disclosure provides a power supply circuit, including: a normal power supply module, an abnormal power supply module, a switch main control module, and an inverse proportional amplification circuit;

[0006] The control end of the constant power supply module is connected to the power supply, the input end is connected to the power supply and the input end of the inverse proportional amplification circuit, and the output end is connected to the load;

[0007] The control end of the extraordinary power supply module is connected to the output end of the inverse proportional amplifier circuit, the input end is connected to the power supply, and the output end is connected to the load;

[0008] The switch main control module controls the connection status between the power supply and the normal power supply module and / or the abnormal power supply module.

[0009] In this way, when the load is in the sleep mode, the current required by the load is small, the control end of the normal power supply module receives the driving signal sent by the power supply, and the input end and the output end of the normal power supply module are turned on. At this time, the input end voltage of the inverse proportional amplifier circuit is large, resulting in a small output end voltage. The output end voltage is not enough to make the input end and the output end of the extraordinary power supply module turn on. At this time, the normal power supply module alone outputs the power supply current required to maintain the load in the sleep mode. When the load switches from the sleep mode to the working mode, the input voltage of the input end of the inverse proportional amplifier circuit decreases, which makes the output voltage of the output end of the inverse proportional amplifier circuit increase. The increased output end voltage can make the input end and the output end of the extraordinary power supply module turn on. At this time, the normal power supply module and the extraordinary power supply module jointly output the power supply current required to maintain the load in the working mode. In this way, the operation state of the power supply circuit can be changed according to the change of the current caused by the change of the working state of the load, and the energy consumption of the load is effectively reduced while ensuring that the load needs to be always powered on, thereby reducing the energy consumption of the whole vehicle.

[0010] In addition, by controlling the connection status between the power supply and the normal power supply module and the abnormal power supply module through the switch main control module, the power supply can be cut off in time to protect the electrical components in the power supply circuit when an abnormality occurs in the power supply circuit.

[0011] In an optional embodiment, the normal power supply module is used to provide normal power to the load; when the power supply current of the load is greater than or equal to a first current threshold, the abnormal power supply module is used to be turned on through the inverse proportional amplification circuit to supply power to the load.

[0012] In an optional implementation, when the voltage output by the inverse proportional amplifier circuit to the control end of the extraordinary electric power supply module is greater than or equal to a first voltage threshold, the input and output ends of the extraordinary electric power supply module are turned on.

[0013] In an optional implementation, when the voltage output by the inverse proportional amplification circuit to the control end of the extraordinary electric power supply module is less than a second voltage threshold, the input and output ends of the extraordinary electric power supply module are disconnected.

[0014] In an optional implementation, when the power supply current of the load is greater than or equal to a first current threshold, the input voltage of the inverse proportional amplifier circuit is reduced, so that the output voltage of the inverse proportional amplifier circuit is increased.

[0015] In an optional implementation, when the power supply current of the load is less than a second current threshold, the input voltage of the inverse proportional amplifier circuit increases, so that the output voltage of the inverse proportional amplifier circuit decreases.

[0016] In an optional implementation, the switch main control module includes a main control chip and a first control switch; the main control chip is connected to the control end of the first control switch; the first end of the first control switch is connected to the power supply; the second end is connected to the normal power supply module, the abnormal power supply module and the inverse proportional amplification circuit;

[0017] The main control chip is used to send a control signal to the first control switch when a first preset condition is met, and the control signal is used to control the first end and the second end of the first control switch to be disconnected to disconnect the power supply from the normal power supply module and the abnormal power supply module.

[0018] In an optional implementation, the switch main control module further includes: a second control switch; a control end of the second control switch is connected to the main control chip; a first end of the second control switch is connected to the power supply, and a second end is connected to the extraordinary power supply module;

[0019] Therefore, the main control chip is used to send the control signal to the second control switch when the second preset condition is met, and the control signal is used to control the first end and the second end of the second control switch to be disconnected to disconnect the power supply from the extraordinary power supply module.

[0020] In an optional implementation manner, the main control chip is also connected to the output end of the extraordinary power supply module;

[0021] When the extraordinary power supply module is turned on, the main control chip receives a wake-up signal from the output end of the extraordinary power supply module, and the wake-up signal is used to switch the main control chip from a sleep mode to a wake-up state.

[0022] In a second aspect, an optional implementation of the present disclosure further provides a chip, comprising: a power supply circuit as described in the above-mentioned first aspect, or any one of the first aspect.

[0023] In a third aspect, an optional implementation of the present disclosure further provides a vehicle-mounted control device, including: an electronic control unit ECU, and a power supply circuit as described in the above-mentioned first aspect, or any one of the first aspect; or a chip as described in the second aspect.

[0024] In a fourth aspect, an optional implementation of the present disclosure further provides a motor vehicle, comprising: a power supply circuit as described in the first aspect or any one of the first aspect; or a chip as described in the second aspect; and a vehicle-mounted control device as described in the third aspect.

[0025] For a description of the effects of the above-mentioned chip, vehicle-mounted control device and motor vehicle, please refer to the description of the above-mentioned data processing device, which will not be repeated here.

[0026] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used together with the specification to illustrate the technical solutions of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a power supply circuit provided by an embodiment of the present disclosure is shown;

[0029] Figure 2 A connection example diagram of a normal power supply module provided by an embodiment of the present disclosure is shown;

[0030] Figure 3 A connection example diagram of another normal power supply module provided by an embodiment of the present disclosure is shown;

[0031] Figure 4 A connection example diagram of an extraordinary power supply module provided by an embodiment of the present disclosure is shown;

[0032] Figure 5 A connection example diagram of another non-standard power supply module provided by an embodiment of the present disclosure is shown;

[0033] Figure 6 An example diagram of an application of a power supply circuit provided by an embodiment of the present disclosure is shown;

[0034] Figure 7 An example diagram of connecting a switch main control module in a power supply circuit provided by an embodiment of the present disclosure is shown;

[0035] Figure 8 One of the specific examples of a power supply circuit provided by an embodiment of the present disclosure is shown;

[0036] Fig. 9 The second specific example of a power supply circuit provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure more clear, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

[0038] With the improvement of vehicle configuration, more and more equipment is installed on the vehicle, which leads to a significant increase in the energy consumption of the whole vehicle. In order to reduce the energy consumption of the vehicle, the following problems need to be solved when designing the vehicle power supply and distribution:

[0039] 1. When the vehicle is in the off state, it can still continue to provide a small current supply to the constant power load, so that the constant power load can maintain the power state with lower energy consumption.

[0040] 2. When the load is awakened, the load should be provided with a current that can meet the load's working requirements.

[0041] 3. When an abnormality occurs in the power supply circuit, cut off the power supply in time to protect the vehicle's electrical components.

[0042] Based on the above research, the present disclosure provides a power supply circuit, a chip, a vehicle-mounted control device and a motor vehicle, including: a normal power supply module, an abnormal power supply module, a switch master control module, and an inverse proportional amplification circuit, which can change the operating state of the power supply circuit according to the change of current caused by the change of the load working state, and effectively reduce the energy consumption of the load while ensuring that the load needs to maintain a powered state at all times, thereby reducing the energy consumption of the entire vehicle.

[0043] In addition, by controlling the on / off status of the normal power supply module and the abnormal power supply module through the switch main control module, the power supply can be cut off in time to protect the electrical components in the power supply circuit when an abnormality occurs in the power supply circuit.

[0044] The connection described in the embodiments of the present disclosure refers to the connection between hardware circuits, for example, connecting different circuit modules (such as a normal power module and a non-normal power module) through branches.

[0045] An electronic fuse (E-fuse) is a programmable electronic fuse used in chip protection, power management, circuit calibration and other scenarios. In the present disclosure, it is mainly used to protect electrical components in various modules in the power supply circuit and connected loads.

[0046] To facilitate understanding of this embodiment, a power supply circuit disclosed in the embodiment of the present disclosure is first introduced in detail.

[0047] See also Figure 1As shown, it is a structural schematic diagram of a power supply circuit provided in an embodiment of the present disclosure, and the power supply circuit includes: a normal power supply module, an abnormal power supply module, a switch main control module, and an inverse proportional amplification circuit; the control end of the normal power supply module is connected to the power supply, the input end is connected to the power supply and the input end of the inverse proportional amplification circuit, and the output end is connected to the load; the control end of the abnormal power supply module is connected to the output end of the inverse proportional amplification circuit, the input end is connected to the power supply, and the output end is connected to the load; the switch main control module controls the connection status of the power supply and the normal power supply module and / or the abnormal power supply module.

[0048] Here, the permanent power supply module refers to a single electrical component or a combination of multiple electrical components that can provide the load with a power supply current to maintain the load in the sleep mode when the load is in the sleep mode.

[0049] When the load is in the sleep mode, in this mode, the load only needs a small current, generally less than 100 milliamperes (mA) to maintain a powered state.

[0050] Exemplarily, the normal power supply module can be composed of an enhanced metal oxide semiconductor MOS tube and a MOS tube driving circuit; wherein the MOS tube driving circuit is used to provide a stable voltage signal for the MOS tube; the MOS tube includes a gate, a drain, and a source; the gate of the MOS tube is connected to the output end of the MOS tube driving circuit; the input end of the MOS tube driving circuit is connected to the power supply as the control end of the normal power supply module, the MOS tube drain is connected to the power supply as the input end of the normal power supply module, and the MOS tube source is connected to the load as the output end of the normal power supply module.

[0051] See also Figure 2 The example diagram of a connection of a normal power supply module is shown in Figure 2 In the embodiment, the power supply is connected to the first voltage-dividing resistor R1 through the branch L21, the first voltage-dividing resistor R1 is connected to the diode D1, the diode D1 is connected to the driving circuit, and the driving circuit is connected to the gate G of the MOS tube to form a path of the voltage signal; the power supply is connected to one end of the second voltage-dividing resistor R2 through the branch L22, and the other end of the second voltage-dividing resistor R2 is connected to the drain D of the MOS tube; the source S of the MOS tube is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the load. Here, the role of the diode D1 is to make the voltage signal applied to the gate G of the MOS tube a forward voltage signal.

[0052] In another example, the normal power supply module includes a transistor; the base of the transistor is connected to the power supply as the control end of the normal power supply module, the collector is connected to the power supply as the input end of the normal power supply module, and the emitter is connected to the load as the output end of the normal power supply module.

[0053] See also Figure 3 Another example of a connection diagram of a normal power supply module is shown in Figure 3 In the figure, the normal power supply module is composed of a transistor, the power supply is connected to one end of the first voltage-dividing resistor R1 through a branch L31, and the other end of the first voltage-dividing resistor R1 is connected to the base B of the transistor; the power supply is connected to one end of the second voltage-dividing resistor R2 through a branch L32, and the other end of the second voltage-dividing resistor R2 is connected to the collector C of the transistor; the emitter E of the transistor is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the load.

[0054] The extraordinary electrical power supply module refers to a single electrical component or a combination of multiple electrical components that can provide the load with a power supply current to maintain the load in the working mode when the load is in the working mode.

[0055] Among them, when the load is in working mode, in this mode, depending on the load type, function, etc., the required power supply current is generally in the range of 100mA-10A.

[0056] Exemplarily, the extraordinary electric power supply module may be composed of at least two parallel MOS tubes and a MOS tube driving circuit; here, by adopting the method of parallel MOS tubes, the output end of the extraordinary electric power supply module can provide a larger power supply current, and the magnitude of the power supply current is positively correlated with the number of MOS tubes in parallel; the gate of each MOS tube in the at least two parallel MOS tubes is connected to the output end of the MOS tube driving circuit, the drain is connected to the power supply circuit, and the source is connected to the load, the input end of the MOS tube driving circuit is connected to the output end of the inverse proportional amplification circuit as the control end of the extraordinary electric power supply module, the drain of each MOS tube is connected to the power supply as one of the input ends of the extraordinary electric power supply module, and the source of each MOS tube is connected to the load as one of the output ends of the extraordinary electric power supply module.

[0057] See also Figure 4 A connection example diagram of an extraordinary power supply module is shown, and the extraordinary power supply module is composed of a MOS tube Q41, a MOS tube Q42 and a MOS tube driving circuit. The gates G of the MOS tube Q41 and the MOS tube Q42 are connected to the MOS tube driving circuit, and the driving circuit is connected to the output end O3 of the inverse proportional amplifier circuit; the drains D of the MOS tube Q41 and the MOS tube Q42 are connected to the power supply through a branch L41; the source S of the MOS tube Q41 is connected to the load through a diode D41; and the source S of the MOS tube Q42 is connected to the load through a diode D42.

[0058] Among them, the type of the above-mentioned MOS tube can be the same as or different from the type of the MOS tube of the normal power supply module, and the present disclosure does not limit it.

[0059] In another example, the extraordinary electric power supply module includes a high-side driver HSD chip; the power supply end of the HSD chip is connected to the power supply; the input end of the HSD chip serves as the control end of the extraordinary electric power supply module and is connected to the output end of the inverse proportional amplifier circuit; the output end of the HSD chip is connected to the load.

[0060] See also Figure 5 Another connection example diagram of an extraordinary power supply module is shown, where the extraordinary power supply module is composed of an HSD chip, the power supply end of the HSD chip is connected to the power supply; the input end IN of the HSD chip is connected to the output end O3 of the inverse proportional amplifier circuit; the output end OUT of the HSD is connected to the diode D51, and the diode D51 is connected to the load.

[0061] Here, the HSD chip can provide a second power supply current below 10A.

[0062] In some possible embodiments provided in the present disclosure, the normal power supply module is used to provide normal power to the load; when the power supply current of the load is greater than or equal to a first current threshold, the abnormal power supply module is used to be turned on through the inverse proportional amplification circuit to supply power to the load.

[0063] Here, the normal current is a current that can satisfy the load to maintain the sleep mode; the first current threshold is a critical current threshold for determining that the load is in the working mode, and a current greater than or equal to the current threshold indicates that the load is in the working mode.

[0064] For example, see Figure 6 An application example diagram of a power supply circuit is shown, and the power supply circuit includes: a normal power supply module, an abnormal power supply module, and an inverse proportional amplification circuit; the first power supply current outputted to the load by the output end of the normal power supply module is smaller than the second power supply current outputted to the load by the output end of the abnormal power supply module.

[0065] The control terminal G1 and the input terminal I1 of the normal power supply module are connected to a power source, the output terminal O1 is connected to a load, and when the load is in a sleep mode, the first power supply current is output.

[0066] Here, the control end G1 of the normal power supply module is connected to the power supply and is used to receive a driving signal issued by the power supply. Depending on the different electrical components in the normal power supply module, the received driving signal includes a voltage signal or a current signal. For example, when the normal power supply module includes a triode, its control end receives a current signal. When the normal power supply module includes a MOS tube and a MOS tube driving circuit, the control end of the normal power supply module receives a voltage signal.

[0067] After receiving the driving signal from the power supply, the control terminal G1 controls the input terminal I1 and the output terminal O1 of the normal power supply module to be turned on according to the signal strength; the input terminal I1 is connected to the power supply through a branch different from the control terminal G1, and the output terminal O1 is connected to the load, and is used to output the first power supply current at the output terminal O1 when the input terminal I1 and the output terminal O1 are turned on.

[0068] Exemplarily, when the load is in sleep mode, the control terminal G1 of the normal power supply module receives a driving signal from the power supply, controls the input terminal I1 and the output terminal O1 in the normal power supply module to be turned on, and at this time, the output terminal O1 of the normal power supply module outputs a first power supply current to the load.

[0069] The input terminal I3 of the inverse proportional amplifier circuit is connected to the power supply and to the input terminal I1 of the normal power supply module, and is used to determine the input voltage of the input terminal I3 of the inverse proportional amplifier circuit. The output terminal O3 is connected to the control terminal of the abnormal power supply module, and is used to provide an output voltage to the control terminal of the abnormal power supply module according to the input voltage of the input terminal I3.

[0070] When the load switches from sleep mode to working mode, the input voltage of the input terminal I3 of the inverse proportional amplifier circuit will change, so that the output voltage of the output terminal O3 of the inverse proportional amplifier circuit changes according to the change of the input voltage. When the control terminal G2 of the extraordinary power supply module receives a voltage signal that can make the input terminal I2 and the output terminal O2 conductive, the input terminal I2 and the output terminal O2 of the extraordinary power supply module are controlled to be conductive. The load switches from sleep mode to working mode, generally after receiving a control instruction, such as a control instruction input by the driver, or a control instruction automatically input by the vehicle electronic control unit (Electronic Control Unit, ECU) according to the collected data.

[0071] Here, the control terminal G2 of the extraordinary power supply module receives a voltage that can make the input terminal I2 and the output terminal O2 conductive, which is described in detail in the following embodiments of the present disclosure and will not be repeated here.

[0072] The input terminal I2 of the extraordinary power supply module is connected to the power supply, and the output terminal O2 is connected to the load, for outputting the second power supply current.

[0073] Exemplarily, the control terminal G2 of the extraordinary electric power supply module is connected to the output terminal O3 of the inverse proportional amplifier circuit. When the output voltage of the output terminal O3 of the inverse proportional amplifier circuit can make the input terminal I2 and the output terminal O2 of the extraordinary electric power supply module conductive, the output terminal of the extraordinary electric power supply module outputs a second power supply current.

[0074] In some other possible embodiments provided in the present disclosure, when the voltage output by the inverse proportional amplification circuit to the control end of the extraordinary electric power supply module is greater than or equal to a first voltage threshold, the input and output ends of the extraordinary electric power supply module are turned on.

[0075] When the power supply current of the load is greater than or equal to a first current threshold, the input voltage of the inverse proportional amplifier circuit is reduced, so that the output voltage of the inverse proportional amplifier circuit is increased.

[0076] See above Figure 2 , Figure 4 , Figure 6 In the example provided, when the load is in sleep mode, the power supply current of the load is less than the first current threshold, the power supply voltage is applied to the MOS transistor gate G through the first voltage divider resistor R1 and the MOS transistor driving circuit, and when the voltage strength applied to the MOS transistor gate G is greater than or equal to the conduction voltage strength threshold of the drain D and the source S, a conductive channel is formed between the drain D and the source S of the MOS transistor, and the drain D and the source S of the MOS transistor become conductive. At this time, the voltage at the output terminal O3 of the inverse proportional amplifier circuit is less than the first voltage threshold.

[0077] When the load switches from sleep mode to working mode, the power supply current of the load is greater than or equal to the first current threshold, so that the input voltage of the input terminal I3 of the inverse proportional amplifier circuit is reduced. After being processed by the inverse proportional amplifier circuit, the output voltage of the output terminal O3 increases, that is, it is equivalent to the voltage applied to the control terminal G2 of the extraordinary power supply module increasing. When the voltage applied to the control terminal G2 of the second power supply module is greater than or equal to the first voltage threshold, a conductive channel is formed between the drain D and the source S of the MOS tube Q51 and the MOS tube Q52 in the extraordinary power supply module, thereby making the input terminal I2 and the output terminal O2 of the extraordinary power supply module conductive.

[0078] See above Figure 3 , Figure 5 , Figure 6 In the example provided, when the load is in sleep mode, the current signal is input to the base B of the transistor through the first voltage-dividing resistor R1. When the current intensity flowing into the base B of the transistor is greater than the conduction current intensity, the collector C and the emitter E of the transistor are turned on. At this time, the first supply current is output to the load through the second voltage-dividing resistor R2, the transistor, and the diode D2.

[0079] When the load switches from sleep mode to working mode, the processing process of the inverse proportional amplifier circuit is similar to the above example, so that the voltage applied to the input terminal IN of the HSD chip in the extraordinary power supply module is greater than or equal to the first voltage threshold, and the output terminal OUT of the HSD chip outputs the second power supply current, that is, the input and output terminals of the extraordinary power supply module are turned on.

[0080] In some other possible embodiments provided in the present disclosure, when the voltage output by the inverse proportional amplification circuit to the control end of the extraordinary electric power supply module is less than a second voltage threshold, the input and output ends of the extraordinary electric power supply module are disconnected.

[0081] When the power supply current of the load is less than the second current threshold, the input voltage of the inverse proportional amplifier circuit increases, so that the output voltage of the inverse proportional amplifier circuit decreases.

[0082] See above Figure 2 , Figure 4 , Figure 6 In the example provided, when the load switches from the working mode to the sleep mode, the power supply current required by the load decreases and is less than the second current threshold, so that the input voltage of the input terminal I3 of the inverse proportional amplifier circuit increases. After being processed by the inverse proportional amplifier circuit, the output voltage of the output terminal O3 of the inverse proportional amplifier circuit decreases, that is, it is equivalent to the voltage applied to the control terminal G2 of the extraordinary electric power supply module decreasing. When the voltage applied to the control terminal G2 of the extraordinary electric power supply module is less than the second voltage threshold, the conductive channel between the drain D and the source S of the MOS tube Q51 and the MOS tube Q52 in the extraordinary electric power supply module is disconnected, thereby disconnecting the input and output terminals of the extraordinary electric power supply module.

[0083] See above Figure 3 , Figure 5 , Figure 6 In the example provided, when the load switches from working mode to sleep mode, the working process of its inverse proportional amplifier circuit is similar to that described above, so that the voltage applied to the input terminal IN of the HSD chip in the extraordinary power supply module is less than the second voltage threshold, and the output terminal OUT of the HSD chip stops outputting the second power supply current, that is, the input and output terminals of the extraordinary power supply module are disconnected.

[0084] In some possible embodiments provided in the present disclosure, the switch main control module includes a main control chip and a first control switch; the main control chip is connected to the control end of the first control switch; the first end of the first control switch is connected to the power supply; the second end is connected to the normal power supply module, the abnormal power supply module and the inverse proportional amplification circuit; the main control chip is used to send a control signal to the first control switch when a first preset condition is met, and the control signal is used to control the first end and the second end of the first control switch to be disconnected, so as to disconnect the power supply from the normal power supply module and the abnormal power supply module.

[0085] Here, the first preset condition may be satisfied, for example, that the current of the power supply circuit is greater than the fault current threshold; or the temperature of any of the electrical components is greater than the fault temperature threshold, etc., causing abnormal current, voltage, and temperature in the circuit; or it may be in response to an external input control instruction, such as forced power off, power supply exhaustion, change of power distribution design, etc. At this time, when the main control chip detects that the power supply circuit satisfies any of the above-mentioned first preset conditions, a control signal is output, and after receiving the control signal, the first control switch disconnects the first end and the second end, and cuts off the connection between the power supply and the control end of the normal power supply module and the control end of the abnormal power supply module.

[0086] Exemplarily, the first control switch can be an E-fuse, and the control signal output by the main control chip can be a high-low level signal. When the power supply circuit is working normally, the main control chip outputs a high-level control signal, and the first end and the second end of the first control switch are turned on; when the main control chip outputs a low-level control signal, the first end and the second end of the first control switch are turned off. It can be known that here are only some examples of one of the control logics of the switch main control module. In fact, there can be other control logics to achieve that when the first preset condition is met, the switch main control module cuts off the connection between the power supply and the normal power supply module and the abnormal power supply module. This disclosure will not repeat them.

[0087] In some other possible embodiments provided in the present disclosure, the switch main control module also includes: a second control switch; the control end of the second control switch is connected to the main control chip; the first end of the second control switch is connected to the power supply, and the second end is connected to the extraordinary power supply module; so the main control chip is used to send the control signal to the second control switch when the second preset condition is met, and the control signal is used to control the first end and the second end of the second control switch to be disconnected, so as to disconnect the power supply from the extraordinary power supply module.

[0088] Here, the second preset condition may be satisfied when the load switches from the working mode to the sleep mode, for example. At this time, when the main control chip detects that the load switches from the working mode to the sleep mode, it outputs a control signal, and after receiving the control signal, the second control switch disconnects the first end and the second end, thereby cutting off the connection between the power supply and the control end of the abnormal power supply module.

[0089] The control logic of the second control switch is similar to that of the first control switch. In a specific implementation, the control logics of the two control switches can be kept the same to make the overall control logic clearer.

[0090] In some other possible embodiments provided by the present disclosure, the main control chip is also connected to the output end of the extraordinary power supply module; when the extraordinary power supply module is turned on, the main control chip receives a wake-up signal from the output end of the extraordinary power supply module, and the wake-up signal is used to switch the main control chip from sleep mode to wake-up state.

[0091] Here, when the load is in sleep mode, since the current in the power supply circuit is small at this time, it is not easy to have faults such as overcurrent and overtemperature. Therefore, the main control chip is in sleep state to reduce energy consumption. When the load is in working mode, the output end of the extraordinary power supply module outputs the second power supply current. Since the current in the power supply circuit increases at this time, it is easy to have faults such as overcurrent and overtemperature. Therefore, the output end of the extraordinary power supply module sends a wake-up signal to wake up the main control chip, so that the main control chip can detect the power supply circuit.

[0092] In addition, the main control chip can also be awakened according to the control instruction when the load is in sleep mode. When the power distribution design needs to be changed, a control instruction can be issued to wake up the main control chip, and then the first control switch is controlled to disconnect by the main control chip.

[0093] See also Figure 7 The example diagram of the connection of the switch main control module in a power supply circuit shown in FIG. Figure 7 In the figure, the switch main control module includes a main control chip, a first control switch S1, and a second control switch S2; the main control chip is connected to the first control switch S1 through a control branch L71, the first end of the first control switch S1 is connected to the power supply, and the second end is connected to the control end G1 and the input end I1 of the normal power supply module; the main control chip is connected to the second control switch S2 through a control branch L72, the first end of the second control switch S2 is connected to the output end O3 of the inverse proportional amplifier circuit, and the second end is connected to the control end G2 of the extraordinary power supply module; the signal output end OS1 of the extraordinary power supply module is connected to the main control chip through a control branch L73.

[0094] When the load is in a dormant state, the main control chip outputs a high-level signal through the control branch L71 and the control branch L72, and the first control switch S1 and the second control switch S2 receive the signal, and the first end and the second end remain closed. At this time, the normal power supply module outputs the first power supply current; the input end I2 and the output end O2 of the non-normal power supply module remain disconnected, and the main control chip remains in a dormant state because it does not receive the wake-up signal output by the second power supply module.

[0095] When the load is in working mode, the first control switch S1 and the second control switch S2 remain in a closed state. At this time, the normal power supply module outputs a first power supply current, and the abnormal power supply module outputs a second power supply current. Since the input terminal I2 and the output terminal O2 of the second power supply module are turned on, the abnormal power supply module outputs a wake-up signal to the main control chip through the control branch L73. The main control chip exits the sleep state according to the wake-up signal and detects the operating status of the power supply circuit.

[0096] Here, the main control chip detects the operating state of the power supply circuit, including at least one of the following three situations:

[0097] Case 1: The power supply circuit operates normally, that is, the main control chip does not detect that the power supply circuit meets the first preset condition or the second preset condition. At this time, the power supply circuit outputs the corresponding power supply current according to the working state of the load.

[0098] Case 2: The main control chip detects that the power supply circuit meets the first preset condition. At this time, the main control chip outputs a low-level signal through the control branch L71 and the control branch L72. After the first control switch S1 and the second control switch S2 receive the signal, they control the first end and the second end to be disconnected, cutting off the connection between the power supply and the normal power supply and transformation module and the abnormal power supply module, and the load is in a power-off state.

[0099] Case three: The main control chip detects that the power supply circuit meets the second preset condition. At this time, the main control chip outputs a low-level signal through the control branch L72. After the second control switch S2 receives the signal, it controls the first end and the second end to be disconnected. Since the first end and the second end of the first control switch S1 are still in the on state at this time, the power supply provides the first power supply current to the load through the normal power supply module, and the load maintains a low energy consumption mode.

[0100] In addition, in the power supply circuit provided by the present disclosure, the electrical components of the normal power supply module and the abnormal power supply module can be combined according to the use cost and actual needs, for example:

[0101] See also Figure 8 One of the specific examples of a power supply circuit shown in FIG. Figure 8In the power supply circuit, the normal power supply module is composed of a MOS tube and a MOS tube driving circuit, and the MOS tube driving circuit can provide a stable voltage signal for the MOS tube; the abnormal power supply module is composed of a plurality of parallel MOS tubes and a MOS tube driving circuit. When the load is in the sleep mode, the MOS tube driving circuit in the normal power supply module outputs a driving voltage signal to the MOS tube gate G terminal, at which time the drain D and the source S of the MOS tube are turned on, and the normal power supply module provides the first power supply current for the load.

[0102] When the load switches from the sleep mode to the working mode, the input voltage of the inverse proportional amplifier circuit decreases and the output voltage increases, so that the driving circuit in the extraordinary power supply module outputs voltage signals to the gate G terminals of the MOS tubes Q81 and Q82 respectively. At this time, the drain D and the source S of the MOS tubes Q81 and Q82 are turned on, and the extraordinary power supply module provides the second power supply current for the load.

[0103] Furthermore, since the drain D and the source S of the MOS tube Q82 are turned on, a wake-up signal can be generated and input to the main control chip. The main control chip receives the wake-up signal and detects the operating status of the power supply circuit.

[0104] When the power supply circuit fails, the current of the power supply circuit will increase and the temperature will rise accordingly. The main control chip detects the changes in the current and temperature of the power supply circuit, controls the switch S1 to disconnect, and cuts off the connection between the power supply and the normal power supply module and the abnormal power supply module. At this time, the current supplied to the load end is 0.

[0105] See also Fig. 9 A second specific example of a power supply circuit shown in FIG. Fig. 9 In the power supply circuit, the normal power supply module is composed of triodes, and the abnormal power supply module is composed of HSD chips; it provides power supply current to the load according to the working state of the load, and the action process when a fault occurs can refer to the above example, and no further elaboration is made here.

[0106] Exemplarily, the normal power supply module and the abnormal power supply module of the power supply circuit may also be any combination of the following:

[0107] The power supply circuit A may be composed of a normal power supply module composed of a triode and an abnormal power supply module composed of an HSD chip.

[0108] The power supply circuit B is composed of a normal power supply module composed of a MOS tube and a MOS tube driving circuit, and an abnormal power supply module composed of an HSD chip.

[0109] The power supply circuit C is composed of a normal power supply module composed of triodes and an abnormal power supply module composed of a plurality of parallel MOS tubes and a MOS tube driving circuit.

[0110] The power supply circuit D is composed of a normal power supply module consisting of a MOS tube and a MOS tube driving circuit, and an abnormal power supply module consisting of a plurality of parallel MOS tubes and a MOS tube driving circuit.

[0111] Those skilled in the art will appreciate that, in the above examples of specific implementations, the order in which the steps are written does not imply a strict order of execution and does not constitute any limitation on the implementation process. The specific order of execution of the steps should be determined by their functions and possible internal logic.

[0112] The embodiment of the present disclosure further provides a chip, including: a power supply circuit as provided in the embodiment of the present disclosure.

[0113] The power supply circuit provided in the embodiments of the present disclosure can be integrated into a chip, including an integrated chip, an AI chip, etc.

[0114] The embodiment of the present disclosure also provides a vehicle-mounted control device, including: an electronic control unit ECU, and a power supply circuit or chip as provided in the embodiment of the present disclosure.

[0115] The vehicle-mounted control device provided in the embodiments of the present disclosure may be a device, a server, etc. installed on the vehicle for performing data processing, which is not limited here.

[0116] The electronic control unit ECU is connected to the load and the power supply circuit and is used to control the working state of the load. When the ECU controls the load to switch from the sleep mode to the working mode, the load requires a larger current to maintain the working mode. At this time, the power supply circuit outputs a second supply current to maintain the working mode of the load.

[0117] An embodiment of the present disclosure also provides a motor vehicle, comprising: a power supply circuit, or a chip, or a vehicle-mounted control device as provided in the embodiment of the present disclosure.

[0118] In the several embodiments provided in the present disclosure, it should be understood that the disclosed chip, vehicle-mounted control device and motor vehicle can be implemented in other ways. The embodiments of the power supply circuit described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0119] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0121] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0122] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present disclosure, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A power supply circuit, characterized in that: include: A normal power supply module, an abnormal power supply module, a switch main control module, and an inverse proportional amplification circuit; The control end of the constant power supply module is connected to the power supply, the input end is connected to the power supply and the input end of the inverse proportional amplification circuit, and the output end is connected to the load; The control end of the extraordinary power supply module is connected to the output end of the inverse proportional amplifier circuit, the input end is connected to the power supply, and the output end is connected to the load; The switch main control module controls the connection status between the power supply and the normal power supply module and / or the abnormal power supply module.

2. The power supply circuit according to claim 1, characterized in that: The normal power supply module is used to provide normal power to the load; when the power supply current of the load is greater than or equal to the first current threshold, the non-normal power supply module is used to be turned on through the inverse proportional amplification circuit to supply power to the load.

3. The power supply circuit according to claim 1 or 2, characterized in that: When the voltage output by the inverse proportional amplification circuit to the control end of the extraordinary power supply module is greater than or equal to a first voltage threshold, the input end and the output end of the extraordinary power supply module are turned on.

4. The power supply circuit according to claim 3, characterized in that: When the voltage output by the inverse proportional amplification circuit to the control end of the extraordinary power supply module is less than a second voltage threshold, the input end and the output end of the extraordinary power supply module are disconnected.

5. The power supply circuit according to claim 4, characterized in that: When the power supply current of the load is greater than or equal to the first current threshold, the input voltage of the inverse proportional amplifier circuit decreases, so that the output voltage of the inverse proportional amplifier circuit increases.

6. The power supply circuit according to claim 5, characterized in that: When the supply current of the load is less than the second current threshold, the input voltage of the inverse proportional amplifier circuit increases, so that the output voltage of the inverse proportional amplifier circuit decreases.

7. The power supply circuit according to claim 1, characterized in that: The switch main control module includes a main control chip and a first control switch; the main control chip is connected to the control end of the first control switch; the first end of the first control switch is connected to the power supply; the second end is connected to the normal power supply module, the abnormal power supply module and the inverse proportional amplification circuit; The main control chip is used to send a control signal to the first control switch when a first preset condition is met, and the control signal is used to control the first end and the second end of the first control switch to be disconnected to disconnect the power supply from the normal power supply module and the abnormal power supply module.

8. The power supply circuit according to claim 7, characterized in that: The switch main control module further includes: a second control switch; the control end of the second control switch is connected to the main control chip; the first end of the second control switch is connected to the power supply, and the second end is connected to the extraordinary power supply module; Therefore, the main control chip is used to send the control signal to the second control switch when the second preset condition is met, and the control signal is used to control the first end and the second end of the second control switch to be disconnected to disconnect the power supply from the extraordinary power supply module.

9. The power supply circuit according to claim 7, characterized in that: The main control chip is also connected to the output end of the extraordinary power supply module; When the extraordinary power supply module is turned on, the main control chip receives a wake-up signal from the output end of the extraordinary power supply module, and the wake-up signal is used to switch the main control chip from a sleep mode to a wake-up state.

10. A chip, characterized in that: include: A power supply circuit as claimed in any one of claims 1 to 9.

11. A vehicle-mounted control device, characterized in that: include: An electronic control unit, and a power supply circuit as claimed in any one of claims 1 to 9, or a chip as claimed in claim 10; Wherein, the electronic control unit serves as a load and is connected to the power supply circuit or the chip; The electronic control unit is used to control a target component in a vehicle.

12. A motor vehicle, characterized in that: include: The switch circuit according to any one of claims 1 to 9, or the chip according to claim 10, or the vehicle-mounted control device according to claim 11.

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