Power management circuit and circuit breaker
By designing the power management circuit in the circuit breaker to monitor the voltage and control the working status of the charging circuit, the problem of high starting threshold of current self-supply source is solved, and a safer and lower power consumption protection effect is achieved.
Patent Information
- Application Number
- CN202421143056.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-22
AI Technical Summary
In the prior art, when the circuit breaker is in the current self-supply mode, the starting threshold of the current self-supply source is higher, which affects the effectiveness of the protection current.
By designing a power management circuit, including monitoring circuits, charging circuits, and control circuits, monitoring circuit detect the voltage of input voltage and off -off power supply, generate control signals, control charging circuits to be turned on or off, and controls the control circuit by indicating signal signal management. The working state to reduce the power consumption of the circuit breaker.
It reduces the startup threshold of the current self-supply source, provides safer protection, and reduces the power consumption of the circuit breaker in the current self-supply mode.
Smart Images
Figure CN222395439U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electronic technology, and in particular to a power management circuit and a circuit breaker. Background Art
[0002] Circuit breakers usually have two power supply modes: voltage and current. When the circuit breaker is in an abnormal situation, the voltage cannot be supplied due to a short circuit, but the current still exists. Therefore, at this time, the circuit breaker will start the current self-supply mode, that is, the circuit breaker only supplies current and trips to protect the safety of the equipment and the personal safety of the user.
[0003] However, in the related art, when the circuit breaker is in the current self-supply mode, the current self-supply has a problem of a high starting threshold. Utility Model Content
[0004] The present application provides a power management circuit and a circuit breaker, which can reduce the startup threshold of a current self-supply source.
[0005] In a first aspect, the present application provides a power management circuit, which includes: a monitoring circuit, a charging circuit and a control circuit.
[0006] The first input terminal of the monitoring circuit and the first terminal of the charging circuit are both used to access the input voltage, the second input terminal of the monitoring circuit and the second terminal of the charging circuit are electrically connected to the tripping power supply, the output terminal of the monitoring circuit is electrically connected to the control terminal of the charging circuit, and the third terminal of the charging circuit is electrically connected to the control circuit.
[0007] The monitoring circuit is used to detect the input voltage and the voltage on the trip power supply, and transmit a control signal to the charging circuit. The control signal is used to control the charging circuit to be turned on or off.
[0008] The charging circuit is used to start or shut down according to the control signal so that the input voltage starts or stops charging the trip power supply, and transmits an indication signal to the control circuit, the indication signal is used to indicate whether the trip power supply is in a charging state.
[0009] The control circuit is used to determine whether to enter a low power consumption state according to an indication signal, and the low power consumption state includes that part of the control circuit stops working.
[0010] Through the power management circuit provided by the first aspect, a control signal for controlling the on or off of the charging circuit can be obtained by detecting the input voltage and the voltage on the trip power supply through the monitoring circuit, and the control signal is transmitted to the charging circuit so that the charging circuit can obtain the control signal. In this way, the charging circuit can be started according to the control signal, so that the input voltage starts to charge the trip power supply, or shut down, so that the input voltage stops charging the trip power supply, and transmits an indication signal for indicating whether the trip power supply is in a charging state to the control circuit, so that the control circuit can obtain the indication signal. Furthermore, the control circuit can determine whether to enter a low power consumption state according to the indication signal, so that part of the control circuit stops working. As a result, the trip power supply and the control circuit can work in different time periods, reduce power consumption, and reduce the starting threshold of the current self-supply source.
[0011] In one possible design, the control circuit is specifically used to determine to enter a low power consumption state when the indication signal indicates that the trip power supply is in a charging state, or to determine to exit the low power consumption state when the indication signal indicates that the trip power supply is not in a charging state.
[0012] In one possible design, the monitoring circuit includes: a first sampling component, a second sampling component and a control signal output component.
[0013] The input end of the first sampling component is used to access the input voltage, the output end of the first sampling component is electrically connected to the first input end of the control signal output component, the second input end of the control signal output component is used to access the first reference voltage, the input end of the second sampling component is electrically connected to the tripping power supply, the output end of the second sampling component is electrically connected to the third input end of the control signal output component, the fourth input end of the control signal output component is used to access the second reference voltage, the output end of the control signal output component is electrically connected to the control end of the charging circuit, and the voltage value of the first reference voltage is less than the voltage value of the second reference voltage.
[0014] The first sampling component is used to sample the input voltage to obtain a first sampling voltage, and transmit the first sampling voltage to the control signal output component.
[0015] The second sampling component is used to sample the voltage on the trip power supply to obtain a second sampling voltage, and transmit the second sampling voltage to the control signal output component.
[0016] A control signal output component is used to obtain a first signal in the control signal and transmit the first signal to the charging circuit when the first sampling voltage is greater than the first reference voltage and the second sampling voltage is less than the second reference voltage, and the first signal is used to control the charging circuit to be turned on, or to obtain a second signal in the control signal and transmit the second signal to the charging circuit when the first sampling voltage is less than the first reference voltage and / or the second sampling voltage is greater than the second reference voltage, and the second signal is used to control the charging circuit to be turned off.
[0017] In one possible design, the control signal output component includes: a first comparator, a second comparator and a logic device.
[0018] The first input terminal of the first comparator is electrically connected to the output terminal of the first sampling component, the second input terminal of the first comparator is used to access the first reference voltage, the output terminal of the first comparator is electrically connected to the first input terminal of the logic device, the first input terminal of the second comparator is electrically connected to the output terminal of the second sampling component, the second input terminal of the second comparator is used to access the second reference voltage, the output terminal of the second comparator is electrically connected to the second input terminal of the logic device, and the output terminal of the logic device is electrically connected to the control terminal of the charging circuit.
[0019] The first comparator is used to compare the first sampling voltage and the first reference voltage to obtain a first digital signal, and transmit the first digital signal to the logic device. The first digital signal is used to characterize the magnitude relationship between the first sampling voltage and the first reference voltage.
[0020] The second comparator is used to compare the second sampling voltage and the second reference voltage to obtain a second digital signal, and transmit the second digital signal to the logic device, wherein the second digital signal is used to characterize the magnitude relationship between the second sampling voltage and the second reference voltage.
[0021] The logic device is used to perform a logic operation on the first digital signal and the second digital signal to obtain the first signal or the second signal.
[0022] In one possible design, the logic device includes: a first diode and a second diode.
[0023] The first end of the first diode is electrically connected to the output end of the first comparator, the first end of the second diode is electrically connected to the output end of the second comparator, the second end of the first diode is electrically connected to the second end of the second diode, and the control end of the charging circuit is electrically connected between the second end of the first diode and the second end of the second diode.
[0024] In one possible design, the logic device includes: an AND gate device.
[0025] The first input terminal of the AND gate device is electrically connected to the output terminal of the first comparator, the second input terminal of the AND gate device is electrically connected to the output terminal of the second comparator, and the output terminal of the AND gate device is electrically connected to the control terminal of the charging circuit.
[0026] In a possible design, the sampling component includes: a first resistor and a second resistor.
[0027] The first end of the first resistor is electrically connected to the trip power supply or used to access the input voltage, the second end of the first resistor is electrically connected to the first end of the second resistor, the first input end or the third input end of the control signal output component is electrically connected between the second end of the first resistor and the first end of the second resistor, and the second end of the second resistor is grounded.
[0028] In a possible design, the charging circuit includes: a driving component, a transistor, and a third resistor.
[0029] The first end of the driving component is electrically connected to the output end of the monitoring circuit, the second end of the driving component is used to access the power supply voltage, the third end of the driving component is electrically connected to the control end of the transistor, the first end of the transistor and the first end of the third resistor are both used to access the input voltage, the second end of the transistor is electrically connected to the tripping power supply, and the second end of the third resistor is electrically connected between the third end of the driving component and the control end of the transistor.
[0030] The driving component is used to turn on or off according to the control signal to turn on or off the transistor, so that the charging circuit is started or shut down.
[0031] In a possible design, the driving component includes: a switching tube and a fourth resistor.
[0032] The control end of the switch tube is electrically connected to the output end of the monitoring circuit, the first end of the switch tube is electrically connected to the control end of the transistor, the first end of the fourth resistor is used to access the power supply voltage, the second end of the fourth resistor is electrically connected between the control end of the switch tube and the output end of the monitoring circuit, and the second end of the switch tube is grounded.
[0033] In a second aspect, the present application provides a circuit breaker, comprising: the power management circuit in the above-mentioned first aspect and each possible design of the above-mentioned first aspect.
[0034] The beneficial effects of the circuit breaker provided in the second aspect and each possible design of the second aspect can refer to the beneficial effects brought about by the first aspect and each possible implementation method of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 A schematic diagram of the structure of a power management circuit provided in one embodiment of the present application;
[0036] Figure 2 A schematic diagram of the structure of another power management circuit provided in one embodiment of the present application. DETAILED DESCRIPTION
[0037] In this application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c alone can represent: a, b, c, a and b, a and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0038] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.
[0039] The terms "connected" and "connected" should be understood in a broad sense. For example, the "connected" or "connected" of a circuit structure can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0040] When the circuit breaker is in the current self-supply mode, since the current can provide less electrical energy, the power consumption of the circuit breaker itself will affect the starting threshold of the protection current. The microcontroller MCU and the tripping power supply in the circuit breaker cannot be turned off. In the related art, the microcontroller MCU and the tripping power supply work at the same time, which makes the circuit breaker itself consume more power, resulting in a higher starting threshold of the current self-supply. For this reason, the present application reduces the power consumption of the circuit breaker itself by controlling the microcontroller MCU and the tripping power supply to be used separately. Thereby, the starting threshold of the current self-supply is reduced to provide safer protection.
[0041] The present application provides a power management circuit and a circuit breaker.
[0042] Since the power management circuit can manage the control circuit 130 and the trip power supply to work in different time periods, that is, the power management circuit can manage the control circuit 130 and the trip power supply to work separately, reducing the power consumption of the circuit breaker, thereby reducing the start threshold of the current self-supply source.
[0043] Reference Figure 1 , Figure 1 This is a schematic diagram of a power management circuit provided by an embodiment of the present application. Figure 1 As shown, the power management circuit 100 may include: a monitoring circuit 110 , a charging circuit 120 and a control circuit 130 .
[0044] The first input terminal of the monitoring circuit 110 and the first terminal of the charging circuit 120 are both used to access the input voltage VIN, the second input terminal of the monitoring circuit 110 and the second terminal of the charging circuit 120 are electrically connected to the trip power supply, the output terminal of the monitoring circuit 110 is electrically connected to the control terminal of the charging circuit 120, and the third terminal of the charging circuit 120 is electrically connected to the control circuit 130.
[0045] The monitoring circuit 110 , the charging circuit 120 and the control circuit 130 may be arranged separately or integratedly.
[0046] In some examples, the trip power supply may be a capacitor, a battery, or other energy storage device, which is not specifically limited in the embodiments of the present application.
[0047] The control circuit 130 is, for example, a microcontroller MCU.
[0048] The monitoring circuit 110 detects the input voltage VIN and the voltage VD on the trip power supply to obtain a control signal. In addition, the monitoring circuit 110 can transmit the control signal to the charging circuit 120 so that the charging circuit 120 can obtain the control signal.
[0049] The control signal is used to control the charging circuit 120 to be turned on or off.
[0050] In this way, when the control signal controls the charging circuit 120 to be turned on, the charging circuit 120 can be started according to the control signal, so that the input voltage VIN starts to charge the trip power supply. In addition, the charging circuit 120 can transmit an indication signal P indicating that the trip power supply is in a charging state to the control circuit 130, so that the control circuit 130 can know that the trip power supply is in a charging state, that is, the trip power supply is in a working state, so as to ensure the effective reserve of the trip power supply. Furthermore, the control circuit 130 determines to enter a low power consumption state, so that part of the control circuit 130 stops working, for example, the control circuit 130 shuts down the business logic. As a result, the trip power supply and the control circuit 130 can work in different time periods, which reduces power consumption compared to the related art in which the trip power supply and the control circuit 130 work at the same time, and reduces the starting threshold of the current self-supply source.
[0051] The indication signal P is used to indicate whether the trip power supply is in a charging state.
[0052] The low power consumption state includes that part of the control circuit 130 stops working.
[0053] When the control signal controls the charging circuit 120 to shut down, the charging circuit 120 can be shut down according to the control signal, so that the input voltage VIN stops charging the trip power supply. In addition, the charging circuit 120 can transmit an indication signal P indicating that the trip power supply is not in a charging state to the control circuit 130, so that the control circuit 130 can know that the trip power supply is not in a charging state, that is, the trip power supply is in a non-working state. Then, the control circuit 130 determines to exit the low power consumption state, so that part of the control circuit 130 starts to work, for example, the control circuit 130 starts the business logic. Thus, the trip power supply and the control circuit 130 can work in different time periods, which reduces power consumption compared to the related art in which the trip power supply and the control circuit 130 work at the same time, and reduces the startup threshold of the current self-supply source.
[0054] The power management circuit and circuit breaker provided in the present application can obtain a control signal for controlling the on or off of the charging circuit by detecting the input voltage and the voltage on the trip power supply through the monitoring circuit, and transmit the control signal to the charging circuit so that the charging circuit can obtain the control signal. In this way, the charging circuit can be started according to the control signal, so that the input voltage starts to charge the trip power supply, or shut down, so that the input voltage stops charging the trip power supply, and transmits an indication signal to the control circuit to indicate whether the trip power supply is in a charging state, so that the control circuit can obtain the indication signal. Furthermore, the control circuit can determine whether to enter a low-power state according to the indication signal, so that part of the control circuit stops working. As a result, the trip power supply and the control circuit can work in different time periods, reduce power consumption, and reduce the starting threshold of the current self-supply source.
[0055] Based on the description of the above embodiment, a possible implementation of the monitoring circuit 110 is exemplified. Figure 2 , Figure 2 Shows Figure 1 The schematic diagram of the power management circuit in FIG. Figure 2 As shown, the monitoring circuit 110 may include: a first sampling component 111 , a second sampling component 112 , and a control signal output component 113 .
[0056] The input end of the first sampling component 111 is used to access the input voltage VIN, the output end of the first sampling component 111 is electrically connected to the first input end of the control signal output component 113, the second input end of the control signal output component 113 is used to access the first reference voltage VREF1, the input end of the second sampling component 112 is electrically connected to the trip power supply, the output end of the second sampling component 112 is electrically connected to the third input end of the control signal output component 113, the fourth input end of the control signal output component 113 is used to access the second reference voltage VREF2, and the output end of the control signal output component 113 is electrically connected to the control end of the charging circuit 120.
[0057] The voltage value of the first reference voltage VREF1 is smaller than the voltage value of the second reference voltage VREF2.
[0058] The input voltage VIN is monitored by the magnitude relationship between the first sampling voltage and the first reference voltage VREF1. For example, when the first sampling voltage is greater than the first reference voltage VREF1, the input voltage VIN is greater than 7V.
[0059] The voltage VD on the trip power supply is monitored by the magnitude relationship between the second sampling voltage and the second reference voltage VREF2. For example, when the second sampling voltage is greater than the second reference voltage VREF2, the voltage VD on the trip power supply is greater than 9V.
[0060] The first sampling component 111 and the second sampling component 112 are both sampling components.
[0061] The first sampling component 111 can sample the input voltage VIN to obtain a first sampling voltage. Furthermore, the first sampling component 111 can transmit the first sampling voltage to the control signal output component 113 so that the control signal output component 113 can obtain the first sampling voltage.
[0062] The second sampling component 112 can sample the voltage VD on the trip power supply to obtain a second sampling voltage. In addition, the second sampling component 112 can transmit the second sampling voltage to the control signal output component 113 so that the control signal output component 113 can obtain the second sampling voltage.
[0063] In this way, when the first sampling voltage is greater than the first reference voltage VREF1 and the second sampling voltage is less than the second reference voltage VREF2, the control signal output component 113 can obtain the first signal in the control signal. In addition, the control signal output component 113 can transmit the first signal to the charging circuit 120 to control the charging circuit 120 to be turned on. Then, the charging circuit 120 can be started to enable the input voltage VIN to start charging the trip power supply.
[0064] The first signal is used to control the charging circuit 120 to be turned on.
[0065] Alternatively, when the first sampling voltage is less than the first reference voltage VREF1 or the second sampling voltage is greater than the second reference voltage VREF2, the control signal output component 113 can obtain the second signal in the control signal. Furthermore, the control signal output component 113 can transmit the second signal to the charging circuit 120 to control the charging circuit 120 to turn off. Thus, the charging circuit 120 can be turned off, so that the input voltage VIN stops charging the trip power supply.
[0066] The second signal is used to control the charging circuit 120 to be turned off.
[0067] Alternatively, when the first sampling voltage is less than the first reference voltage VREF1 and the second sampling voltage is greater than the second reference voltage VREF2, the control signal output component 113 can obtain the second signal in the control signal. In addition, the control signal output component 113 can transmit the second signal to the charging circuit 120 to control the charging circuit 120 to turn off. In turn, the charging circuit 120 can be turned off, so that the input voltage VIN stops charging the trip power supply.
[0068] In addition, when the first sampling voltage is less than the first reference voltage VREF1 , no matter the second sampling voltage is greater than the second reference voltage VREF2 or the second sampling voltage is less than the second reference voltage VREF2 , the charging circuit 120 is turned off to ensure the power supply of the control circuit 130 .
[0069] Thus, the charging circuit 120 can be started or shut down according to the control signal.
[0070] In summary, the first sampling component can sample the input voltage to obtain the first sampling voltage, and transmit the first sampling voltage to the control signal output component, so that the control signal output component can obtain the first sampling voltage. The second sampling component can sample the voltage on the trip power supply to obtain the second sampling voltage, and transmit the second sampling voltage to the control signal output component, so that the control signal output component can obtain the second sampling voltage. In this way, when the first sampling voltage is greater than the first reference voltage and the second sampling voltage is less than the second reference voltage, the control signal output component can obtain the first signal in the control signal, and transmit the first signal to the charging circuit to control the charging circuit to be turned on. Then, the charging circuit can be started, so that the input voltage starts to charge the trip power supply. Alternatively, when the first sampling voltage is less than the first reference voltage and / or the second sampling voltage is greater than the second reference voltage, the control signal output component can obtain the second signal in the control signal, and transmit the second signal to the charging circuit to turn off the charging circuit. Then, the charging circuit can be turned off, so that the input voltage stops charging the trip power supply. Thus, the charging circuit can be started or turned off according to the control signal.
[0071] Based on the description of the above embodiment, a possible implementation of the control signal output component 113 is exemplified. Figure 2 As shown, the control signal output component 113 may include: a first comparator COM1, a second comparator COM2 and a logic device 113-1.
[0072] The first input terminal of the first comparator COM1 is electrically connected to the output terminal of the first sampling component 111, the second input terminal of the first comparator COM1 is used to access the first reference voltage VREF1, the output terminal of the first comparator COM1 is electrically connected to the first input terminal of the logic 113-1, the first input terminal of the second comparator COM2 is electrically connected to the output terminal of the second sampling component 112, the second input terminal of the second comparator COM2 is used to access the second reference voltage VREF2, the output terminal of the second comparator COM2 is electrically connected to the second input terminal of the logic 113-1, and the output terminal of the logic 113-1 is electrically connected to the control terminal of the charging circuit 120.
[0073] In some examples, the logic device 113 - 1 may include a first diode D1 and a second diode D2 .
[0074] A first end of the first diode D1 is electrically connected to the output end of the first comparator COM1, a first end of the second diode D2 is electrically connected to the output end of the second comparator COM2, a second end of the first diode D1 is electrically connected to a second end of the second diode D2, and a control end of the charging circuit 120 is electrically connected between the second end of the first diode D1 and the second end of the second diode D2.
[0075] In some examples, the logic device 113 - 1 may include an AND gate device.
[0076] The first input terminal of the AND gate device is electrically connected to the output terminal of the first comparator COM1 , the second input terminal of the AND gate device is electrically connected to the output terminal of the second comparator COM2 , and the output terminal of the AND gate device is electrically connected to the control terminal of the charging circuit 120 .
[0077] The first comparator COM1 can compare the first sampling voltage with the first reference voltage VREF1 to obtain a first digital signal. In addition, the first comparator COM1 can transmit the first digital signal to the logic device 113 - 1 so that the logic device 113 - 1 can obtain the first digital signal.
[0078] The first digital signal is used to characterize the magnitude relationship between the first sampling voltage and the first reference voltage VREF1.
[0079] The second comparator COM2 can compare the second sampling voltage with the second reference voltage VREF2 to obtain a second digital signal. In addition, the second comparator COM2 can transmit the second digital signal to the logic device 113 - 1 so that the logic device 113 - 1 can obtain the second digital signal.
[0080] The second digital signal is used to represent the magnitude relationship between the second sampling voltage and the second reference voltage VREF2.
[0081] When the first digital signal indicates that the first sampling voltage is greater than the first reference voltage VREF1, and the second digital signal indicates that the second sampling voltage is less than the second reference voltage VREF2, the logic device 113-1 can perform a logic operation on the first digital signal and the second digital signal to obtain a first signal, so that the control signal output component 113 can output the first signal. Thus, the charging circuit 120 can be started.
[0082] The logical operation refers to the logical operation of "AND".
[0083] When the first digital signal indicates that the first sampling voltage is less than the first reference voltage VREF1, or the second digital signal indicates that the second sampling voltage is greater than the second reference voltage VREF2, the logic device 113-1 can perform a logic operation on the first digital signal and the second digital signal to obtain a second signal, so that the control signal output component 113 can output the second signal. Thus, the charging circuit 120 can be turned off.
[0084] When the first digital signal indicates that the first sampling voltage is less than the first reference voltage VREF1, and the second digital signal indicates that the second sampling voltage is greater than the second reference voltage VREF2, the logic device 113-1 can perform a logic operation on the first digital signal and the second digital signal to obtain a second signal, so that the control signal output component 113 can output the second signal. Thus, the charging circuit 120 can be turned off.
[0085] In summary, the first comparator can compare the first sampling voltage and the first reference voltage to obtain the first digital signal, and transmit the first digital signal to the logic device so that the logic device can obtain the first digital signal. The second comparator can compare the second sampling voltage and the second reference voltage to obtain the second digital signal, and transmit the second digital signal to the logic device so that the logic device can obtain the second digital signal. In this way, the logic device can perform logical operations on the first digital signal and the second digital signal to obtain the first signal or the second signal. Thus, the control signal output component can output the first signal and the second signal to start or shut down the charging circuit.
[0086] Based on the description of the above embodiment, a possible implementation of the sampling component is exemplified. Figure 2 As shown, the sampling component may include: a first resistor R1 and a second resistor R2.
[0087] The first end of the first resistor R1 is electrically connected to the trip power supply or used to access the input voltage VIN, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2, the first input end or the third input end of the control signal output component 113 is electrically connected between the second end of the first resistor R1 and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded.
[0088] When the sampling component is the first sampling component 111 , the first end of the first resistor R1 is used to access the input voltage VIN, and the first input end of the control signal output component 113 is electrically connected between the second end of the first resistor R1 and the first end of the second resistor R2 .
[0089] When the sampling component is the second sampling component 112 , the first end of the first resistor R1 is electrically connected to the tripping power supply, and the third input end of the control signal output component 113 is electrically connected between the second end of the first resistor R1 and the first end of the second resistor R2 .
[0090] Based on the description of the above embodiment, a possible implementation of the charging circuit 120 is exemplified. Figure 2 As shown, the charging circuit 120 may include: a driving component 121, a transistor MOS and a third resistor R3.
[0091] The first end of the driving component 121 is electrically connected to the output end of the detection circuit 110, the second end of the driving component 121 is used to access the power supply voltage VCC, the third end of the driving component 121 is electrically connected to the control end of the transistor MOS, the first end of the transistor MOS and the first end of the third resistor R3 are both used to access the input voltage VIN, the second end of the transistor MOS is electrically connected to the tripping power supply, and the second end of the third resistor R3 is electrically connected between the third end of the driving component 121 and the control end of the transistor MOS.
[0092] When the control signal controls the charging circuit 120 to be turned on, the driving component 121 is turned on. Thus, under the action of the turned-on driving component 121, the transistor MOS is turned on, so that the charging circuit 120 is started. Thus, the input voltage VIN starts to charge the trip power supply.
[0093] When the control signal controls the charging circuit 120 to be turned off, the driving component 121 is turned off. Thus, under the action of the turned-off driving component 121 and the third resistor R3, the transistor MOS is turned off, so that the charging circuit 120 is turned off. Thus, the input voltage VIN stops charging the trip power supply.
[0094] In summary, the driving component can be turned on according to the control signal, so that the transistor is turned on. Then, the charging circuit can be started. Alternatively, the driving component can be turned off according to the control signal, so that the transistor is turned off. Then, the charging circuit can be turned off. Thus, the charging circuit can be started or turned off according to the control signal.
[0095] Based on the description of the above embodiment, a possible implementation of the driving component 121 is exemplified. Figure 2 As shown, the driving component 121 may include: a switch tube K and a fourth resistor R4.
[0096] The control end of the switch tube K is electrically connected to the output end of the detection circuit 110, the first end of the switch tube K is electrically connected to the control end of the transistor MOS, the first end of the fourth resistor R4 is used to access the power supply voltage, the second end of the fourth resistor R4 is electrically connected between the control end of the switch tube K and the output end of the detection circuit 110, and the second end of the switch tube K is grounded.
[0097] In some examples, the driving component 121 may further include: a fifth resistor R5 .
[0098] A first end of the fifth resistor R5 is electrically connected to the output end of the detection circuit 110 , and a second end of the fifth resistor R5 is electrically connected to the control end of the switch tube K.
[0099] The switch tube K is, for example, a transistor NPN.
[0100] When the control signal controls the charging circuit 120 to be turned on, the switch tube K is turned on, and thus the driving component 121 is turned on.
[0101] When the control signal controls the charging circuit 120 to be turned off, the switch tube K is turned off. Thus, the driving component 121 is turned off.
[0102] In summary, the switch tube is turned on or off by controlling the control signal, so that the drive component is turned on or off. Thus, the drive component can be turned on or off according to the control signal.
[0103] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A power management circuit, characterized in that: The power management circuit includes: a monitoring circuit, a charging circuit and a control circuit; The first input end of the monitoring circuit and the first end of the charging circuit are both used to access the input voltage, the second input end of the monitoring circuit and the second end of the charging circuit are electrically connected to the trip power supply, the output end of the monitoring circuit is electrically connected to the control end of the charging circuit, and the third end of the charging circuit is electrically connected to the control circuit; The monitoring circuit is used to detect the input voltage and the voltage on the trip power supply, and transmit a control signal to the charging circuit, wherein the control signal is used to control the charging circuit to be turned on or off; The charging circuit is used to start or shut down according to the control signal, so that the input voltage starts or stops charging the trip power supply, and transmits an indication signal to the control circuit, wherein the indication signal is used to indicate whether the trip power supply is in a charging state; The control circuit is used to determine whether to enter a low power consumption state according to the indication signal, and the low power consumption state includes partially stopping the operation of the control circuit.
2. The circuit according to claim 1, characterized in that The control circuit is specifically used to determine to enter the low power consumption state when the indication signal indicates that the trip power supply is in a charging state; or determine to exit the low power consumption state when the indication signal indicates that the trip power supply is not in a charging state.
3. The circuit according to claim 2, characterized in that The monitoring circuit comprises: a first sampling component, a second sampling component and a control signal output component; The input end of the first sampling component is used to access the input voltage, the output end of the first sampling component is electrically connected to the first input end of the control signal output component, the second input end of the control signal output component is used to access the first reference voltage, the input end of the second sampling component is electrically connected to the trip power supply, the output end of the second sampling component is electrically connected to the third input end of the control signal output component, the fourth input end of the control signal output component is used to access the second reference voltage, the output end of the control signal output component is electrically connected to the control end of the charging circuit, and the voltage value of the first reference voltage is less than the voltage value of the second reference voltage; The first sampling component is used to sample the input voltage to obtain a first sampling voltage, and transmit the first sampling voltage to the control signal output component; The second sampling component is used to sample the voltage on the trip power supply to obtain a second sampling voltage, and transmit the second sampling voltage to the control signal output component; The control signal output component is used to obtain a first signal in the control signal and transmit the first signal to the charging circuit when the first sampling voltage is greater than the first reference voltage and the second sampling voltage is less than the second reference voltage, and the first signal is used to control the charging circuit to be turned on; or, when the first sampling voltage is less than the first reference voltage and / or the second sampling voltage is greater than the second reference voltage, obtain a second signal in the control signal and transmit the second signal to the charging circuit, and the second signal is used to control the charging circuit to be turned off.
4. The circuit according to claim 3, characterized in that The control signal output component includes: a first comparator, a second comparator and a logic device; The first input end of the first comparator is electrically connected to the output end of the first sampling component, the second input end of the first comparator is used to access the first reference voltage, the output end of the first comparator is electrically connected to the first input end of the logic device, the first input end of the second comparator is electrically connected to the output end of the second sampling component, the second input end of the second comparator is used to access the second reference voltage, the output end of the second comparator is electrically connected to the second input end of the logic device, and the output end of the logic device is electrically connected to the control end of the charging circuit; The first comparator is used to compare the first sampled voltage and the first reference voltage to obtain a first digital signal, and transmit the first digital signal to the logic device, wherein the first digital signal is used to characterize the magnitude relationship between the first sampled voltage and the first reference voltage; The second comparator is used to compare the second sampled voltage with the second reference voltage to obtain a second digital signal, and transmit the second digital signal to the logic device, wherein the second digital signal is used to characterize the magnitude relationship between the second sampled voltage and the second reference voltage; The logic device is used to perform a logic operation on the first digital signal and the second digital signal to obtain the first signal or the second signal.
5. The circuit according to claim 4, characterized in that The logic device includes: a first diode and a second diode; The first end of the first diode is electrically connected to the output end of the first comparator, the first end of the second diode is electrically connected to the output end of the second comparator, the second end of the first diode is electrically connected to the second end of the second diode, and the control end of the charging circuit is electrically connected between the second end of the first diode and the second end of the second diode.
6. The circuit according to claim 4, characterized in that The logic device comprises: an AND gate device; The first input terminal of the AND gate device is electrically connected to the output terminal of the first comparator, the second input terminal of the AND gate device is electrically connected to the output terminal of the second comparator, and the output terminal of the AND gate device is electrically connected to the control terminal of the charging circuit.
7. The circuit according to claim 3, characterized in that The sampling component includes: a first resistor and a second resistor; The first end of the first resistor is electrically connected to the trip power supply or used to access the input voltage, the second end of the first resistor is electrically connected to the first end of the second resistor, the first input end or the third input end of the control signal output component is electrically connected between the second end of the first resistor and the first end of the second resistor, and the second end of the second resistor is grounded.
8. The circuit according to any one of claims 1 to 7, characterized in that: The charging circuit comprises: a driving component, a transistor and a third resistor; The first end of the driving component is electrically connected to the output end of the monitoring circuit, the second end of the driving component is used to access the power supply voltage, the third end of the driving component is electrically connected to the control end of the transistor, the first end of the transistor and the first end of the third resistor are both used to access the input voltage, the second end of the transistor is electrically connected to the trip power supply, and the second end of the third resistor is electrically connected between the third end of the driving component and the control end of the transistor; The driving component is used to turn on or off according to the control signal, so as to turn on or off the transistor, thereby starting or shutting down the charging circuit.
9. The circuit according to claim 8, characterized in that The driving component comprises: a switch tube and a fourth resistor; The control end of the switch tube is electrically connected to the output end of the monitoring circuit, the first end of the switch tube is electrically connected to the control end of the transistor, the first end of the fourth resistor is used to access the power supply voltage, the second end of the fourth resistor is electrically connected between the control end of the switch tube and the output end of the monitoring circuit, and the second end of the switch tube is grounded.
10. A circuit breaker, characterized in that: include: A power management circuit as claimed in any one of claims 1 to 9.