CN221177259U - Alarm protection circuit and power management circuit - Google Patents
Alarm protection circuit and power management circuit Download PDFInfo
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- CN221177259U CN221177259U CN202322722648.7U CN202322722648U CN221177259U CN 221177259 U CN221177259 U CN 221177259U CN 202322722648 U CN202322722648 U CN 202322722648U CN 221177259 U CN221177259 U CN 221177259U
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Abstract
The application provides an alarm protection circuit and a power management circuit. The first end of the fuse is used for connecting in the power voltage. The first switch circuit is used for outputting a first protection signal when the power supply voltage is larger than a first preset voltage. The alarm device is used for outputting first alarm information according to the first protection signal. The input end of the second switch circuit is electrically connected with the output end of the first switch circuit; the second switch circuit is used for outputting an abnormal signal according to the first protection signal. The control circuit is electrically connected with the output end of the second switch circuit; the control circuit is also used for cutting off the power supply voltage according to the abnormal signal. According to the application, the first switch circuit outputs the first protection signal when the power supply voltage is larger than the first preset voltage so as to control the alarm device to output the first alarm information, so that the first alarm information can be timely and accurately output when the power supply voltage is over-voltage or the fuse is about to be fused.
Description
Technical Field
The application relates to the field of power supply circuits, in particular to an alarm protection circuit and a power supply management circuit.
Background
The power supply circuit of the electronic equipment is usually provided with a fuse for protecting the power supply, and when abnormal conditions such as overcurrent and overvoltage occur in the power supply circuit, the fuse is fused to disconnect the power supply, so that the damage of a later-stage circuit is avoided. However, in electronic devices with relatively complex circuit structures, such as a machine, a fuse blows, and the machine stops working, it is necessary to measure and check through a multimeter or other devices to determine whether the fuse blows or other circuit faults. This results in that the staff cannot determine the failure source in time, and the equipment cannot be overhauled in time to recover the normal work.
Disclosure of utility model
In order to solve the problems in the prior art, the application provides an alarm protection circuit and a power management circuit.
The application provides an alarm protection circuit, which comprises:
The first end of the fuse is used for being connected with a power supply voltage;
The input end of the first switch circuit is electrically connected with the second end of the fuse; the first switch circuit is used for outputting a first protection signal when the power supply voltage is larger than a first preset voltage;
The alarm device is electrically connected with the output end of the first switch circuit; the alarm device is used for outputting first alarm information according to the first protection signal;
the input end of the second switching circuit is electrically connected with the output end of the first switching circuit; the second switch circuit is used for outputting an abnormal signal according to the first protection signal;
the control circuit is electrically connected with the output end of the second switch circuit; the control circuit is also used for cutting off the power supply voltage according to the abnormal signal.
In an embodiment, the control circuit is further configured to be electrically connected to a power supply circuit, and the control circuit is configured to control the power supply circuit to stop working according to the abnormal signal, so as to stop outputting the power supply voltage.
In an embodiment, the alarm protection circuit further comprises a third switching circuit;
The first end of the third switching circuit is electrically connected with the output end of the second switching circuit, and the second end of the third switching circuit is electrically connected with the control circuit; the third switch circuit is used for being conducted according to the abnormal signal.
In an embodiment, the first switching circuit includes a first switching component, a second switching component, a first zener diode, a first resistor, and a second resistor;
The first end and the second end of the first switch component are electrically connected with the second end of the fuse, and the third end of the first switch component is electrically connected with the first end of the second switch component; the first end of the first switch component is also electrically connected with the cathode of the first zener diode, and the anode of the first zener diode is grounded;
A second end of the second switch component is electrically connected with a second end of the fuse, and a third end of the second switch component is electrically connected with a first end of the second switch component;
A first end of the first resistor is electrically connected with a second end of the second switch component, and a second end of the first resistor is electrically connected with a first end of the second switch component; the first end of the second resistor is electrically connected with the first end of the second switch component, and the second end of the second resistor is grounded.
In an embodiment, the first switch circuit is further configured to output a second protection signal when the power supply voltage is less than a second preset voltage; the second preset voltage is smaller than the first preset voltage;
The alarm device is also used for outputting second alarm information according to the second protection signal;
The second switch circuit is further used for outputting the abnormal signal according to the second protection signal.
In an embodiment, the first switching circuit further comprises a third switching component, a fourth switching component and a second zener diode;
The cathode of the second zener diode is electrically connected with the second end of the fuse, and the anode of the second zener diode is electrically connected with the first end of the third switch component; the second end of the third switch component is electrically connected with the first end of the fourth switch component, and the third end of the third switch component is grounded; the first end of the fourth switching component is also electrically connected with the second end of the fuse, the second end of the fourth switching component is electrically connected with the first end of the first switching component, and the third end of the fourth switching component is grounded.
In an embodiment, the first switching circuit further includes a third zener diode;
The negative electrode of the third zener diode is electrically connected with the positive electrode of the second zener diode, and the positive electrode of the third zener diode is electrically connected with the first end of the third switch component.
In an embodiment, the second switching circuit includes a fifth switching component and a sixth switching component;
The first end of the fifth switch component is electrically connected with the output end of the first switch circuit, the second end of the fifth switch component is used for accessing the power supply voltage, and the third end of the fifth switch component is grounded; the first end of the sixth switching component is used for being connected with the power supply voltage, the second end of the sixth switching component is grounded, and the third end of the sixth switching component is an output end of the second switching circuit.
The application also provides a power management circuit which comprises a power circuit and the alarm protection circuit.
In an embodiment, the number of the power supply circuits is a plurality, and the number of the alarm protection circuits is consistent with the number of the power supply circuits;
And the alarm protection circuits are used for being electrically connected with the power supply circuits in a one-to-one correspondence manner.
According to the application, the first protection signal is output by the first switch circuit when the power supply voltage is larger than the first preset voltage so as to control the alarm device to output the first alarm information, and the first alarm information can be timely and accurately output when the power supply voltage is over-voltage or the fuse is about to be fused, so that a worker can conveniently position a fault source and timely overhaul.
Drawings
Fig. 1 is a schematic diagram of an alarm protection circuit according to an embodiment of the present application.
Fig. 2 is a schematic diagram of an alarm protection circuit according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a third switching circuit according to an embodiment of the application.
Fig. 4 is a schematic block diagram of a power management circuit according to an embodiment of the application.
Description of the main reference signs
Fuse 110 of alarm protection circuit 100
The first switch circuit 120 alarms 130
The second switch circuit 140 controls the circuit 150
Third switching circuit 160 first switching component Q1
Second switching component Q2 first zener diode D1
First resistor R1 and second resistor R2
Third switching component Q3 fourth switching component Q4
Second zener diode D2 third zener diode D3
Fifth switching component Q5 sixth switching component Q6
Power supply circuit 200
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description will make reference to the accompanying drawings to more fully describe the application. Exemplary embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals designate identical or similar components.
Referring to fig. 1, the present application proposes an alarm protection circuit 100, and the alarm protection circuit 100 includes a fuse 110, a first switch circuit 120, an alarm device 130, a second switch circuit 140, and a control circuit 150. A first terminal of the fuse 110 is used to access a supply voltage. An input terminal of the first switching circuit 120 is electrically connected to a second terminal of the fuse 110; the first switch circuit 120 is configured to output a first protection signal when the power voltage is greater than a first preset voltage. The alarm device 130 is electrically connected with the output end of the first switch circuit 120; the alarm device 130 is configured to output first alarm information according to the first protection signal. An input terminal of the second switch circuit 140 is electrically connected to an output terminal of the first switch circuit 120; the second switch circuit 140 is used for outputting an abnormal signal according to the first protection signal. The control circuit 150 is electrically connected to the output terminal of the second switch circuit 140; the control circuit 150 is also used to cut off the power supply voltage according to the abnormality signal.
In this embodiment, when the voltage across the fuse 110 exceeds the fusing voltage for a period of time, the heat generated by the fuse 110 will melt the fuse 110, so as to open the circuit. The fuse 110 may be selected according to a power supply voltage, for example, when the power supply voltage is 24V, the fuse 110 with a fusing voltage slightly greater than 24V may be selected; when the power supply voltage is 220V, the fuse 110 with a fusing voltage slightly greater than 220V may be selected.
The first preset voltage may be set to be identical to or similar to the fusing voltage of the fuse 110. If the power voltage is greater than the first preset voltage, the fuse 110 will be blown after a period of time to generate enough heat. At this time, the first switch circuit 120 outputs a first protection signal according to a power voltage greater than a first preset voltage to control the alarm device 130 to output first alarm information. The alarm device 130 may be a light emitting diode, a display screen, a nixie tube, a buzzer alarm, etc., and the first alarm information may be an optical signal and/or an acoustic signal. Thus, when the power voltage is greater than the first preset voltage, the first switch circuit 120 outputs the first protection signal to control the alarm device 130 to output the first alarm information, so that the worker can be timely reminded of the fuse 110 to be blown or to be subjected to overvoltage fault, and accordingly the repair can be timely performed. Particularly in a device in which an internal circuit is complicated, such as a machine, the number of alarm protection circuits 100 needs to be set to be plural to protect plural circuits. The staff can quickly determine the alarm protection circuit 100 with overvoltage or the fuse 110 is disconnected according to the first alarm information output by one or more alarm protection circuits 100, further determine the circuit with overvoltage fault, and timely overhaul the machine to restore the normal work.
In addition, a solution may be present inside the fuse 110 and not blown, and a mechanical contact failure causes the fuse 110 to be disconnected from the subsequent stage circuit, resulting in a false alarm. In this embodiment, the first switch circuit 120 is configured to output the first protection signal to control the alarm device 130 to output the first alarm information when the power supply voltage is greater than the first preset voltage, and when the power supply voltage is less than the first preset voltage (e.g. the fuse 110 is not connected), the first switch circuit 120 does not output the first protection signal, and thus the alarm device 130 is not triggered to alarm in error, so that the shutdown rate of the apparatus is reduced.
Further, the second switch circuit 140 may output an abnormal signal according to the first protection signal output by the first switch circuit 120, so that the control circuit 150 cuts off the power voltage in time before the fuse 110 blows, thereby avoiding the damage of the higher power voltage to the subsequent circuit and protecting the subsequent circuit. For example, the control circuit 150 may also be electrically connected to the power supply circuit 200, and control the power supply circuit 200 to stop operating according to an abnormality signal to stop outputting the power supply voltage. The control circuit 150 may be implemented by a chip with a control function, such as a microprocessor, an FPGA, or the like.
The application outputs the first protection signal to control the alarm device 130 to output the first alarm information when the power voltage is larger than the first preset voltage through the first switch circuit 120, and can timely and accurately output the first alarm information when the power voltage is over-voltage or the fuse 110 is about to be fused, thereby being convenient for staff to locate fault sources and timely overhaul.
Referring to fig. 1 and 3, in an embodiment, the alarm protection circuit 100 further includes a third switching circuit 160. A first end of the third switching circuit 160 is electrically connected to the output end of the second switching circuit 140, and a second end of the third switching circuit 160 is electrically connected to the control circuit 150; the third switch circuit 160 is used for conducting according to the abnormal signal.
In this embodiment, the third switching circuit 160 may be implemented by using a device with a switching function, such as a relay, a field effect transistor, or the like. The third switch circuit 160 transmits the abnormal signal to the control circuit 150, so that the control circuit 150 is electrically isolated from the voltage fluctuation at the front end. In addition, when the number of fuses 110 needs to be set to be plural, the first switching circuit 120, the second switching circuit 140, and the alarm device 130 may be set to be identical to the number of fuses 110, and the controller may be set to be one, and when any one or more abnormal signals are output, they may be transmitted to the control circuit 150 through the third switching circuit 160. That is, the control circuit 150 is connected to the third switch circuit 160 through only one pin, so as to switch off the power supply voltage in time when abnormal, thereby reducing the number of occupied pins.
Referring to fig. 2, in an embodiment, the first switching circuit 120 includes a first switching part Q1, a second switching part Q2, a first zener diode D1, a first resistor R1, and a second resistor R2. The first end and the second end of the first switching component Q1 are electrically connected with the second end of the fuse 110, and the third end of the first switching component Q1 is electrically connected with the first end of the second switching component Q2; the first end of the first switching component Q1 is further electrically connected to the cathode of the first zener diode D1, and the anode of the first zener diode D1 is grounded. A second end of the second switching part Q2 is electrically connected to the second end of the fuse 110, and a third end of the second switching part Q2 is electrically connected to the first end of the second switching part Q2. A first end of the first resistor R1 is electrically connected with a second end of the second switching component Q2, and a second end of the first resistor R1 is electrically connected with a first end of the second switching component Q2; the first end of the second resistor R2 is electrically connected to the first end of the second switching element Q2, and the second end of the second resistor R2 is grounded. The first zener diode D1 is configured to break down when the power supply voltage is greater than a first preset voltage, so as to control the first switching component Q1 to be turned on and the second switching component Q2 to be turned off; the first zener diode D1 is further configured to be turned off when the power supply voltage is less than or equal to a first preset voltage, so as to control the first switching component Q1 to be turned off and the second switching component Q2 to be turned on.
In this embodiment, the first switching component Q1 may be implemented by using a triode, a field effect transistor, or the like, and the second switching component Q2 may be implemented by using a triode, a field effect transistor, or the like. The overvoltage threshold of the first zener diode D1 is selected so that it can be broken down when the supply voltage is greater than the first preset voltage. For example, the first switching component Q1 is a PNP transistor, the second switching component Q2 is a PMOS transistor, the power voltage is 24V, and the overvoltage threshold of the first preset voltage and the overvoltage threshold of the first zener diode D1 can be set to 24+0.7v. When the power supply voltage is greater than 24.7V, the first zener diode D1 is broken down, the first end (base) of the first switching component Q1 is grounded, the second end (drain) of the first switching component Q1 is turned on, the power supply voltage is supplied to the gate of the second switching component Q2 through the first switching component Q1, at this time, the first switching component Q1 is turned off, and the output is at a low level, so as to drive the alarm device 130 to output the first alarm information and the second switching circuit 140 to output the abnormal signal.
When the input power voltage is less than or equal to 24.7V, the first zener diode D1 cannot be broken down, the first terminal (base) of the first switching component Q1 is connected to the power voltage, the first switching component Q1 is disconnected, and the power voltage of the drain electrode of the second switching component Q2 is connected to ground through the first resistor R1 and the second resistor R2. At this time, the voltage obtained by dividing the first end (gate) of the second switch circuit 140 by the first resistor R1 and the second resistor R2 is less than 0V, the second switch circuit 140 is turned on, the output is high, the alarm device 130 does not output the first alarm information, and the second switch circuit 140 does not output the abnormal signal.
In an embodiment, the first switch circuit 120 is further configured to output a second protection signal when the power voltage is less than a second preset voltage; the second preset voltage is smaller than the first preset voltage. The alarm device 130 is further configured to output second alarm information according to the second protection signal. The second switch circuit 140 is further configured to output an abnormal signal according to the second protection signal.
In this embodiment, the second preset voltage may be set to be slightly smaller than the power supply voltage, so as to detect the power supply voltage under-voltage. For example, when the power supply voltage is 24V, the second preset voltage may be set to 23.6V.
In an embodiment, the first switching circuit 120 further includes a third switching component Q3, a fourth switching component Q4, and a second zener diode D2. The cathode of the second zener diode D2 is electrically connected to the second terminal of the fuse 110, and the anode of the second zener diode D2 is electrically connected to the first terminal of the third switching component Q3; the second end of the third switching component Q3 is electrically connected with the first end of the fourth switching component Q4, and the third end of the third switching component Q3 is grounded; the first end of the fourth switching part Q4 is also electrically connected to the second end of the fuse 110, the second end of the fourth switching part Q4 is electrically connected to the first end of the first switching part Q1, and the third end of the fourth switching part Q4 is grounded. The second zener diode D2 is configured to break down when the power supply voltage is greater than a second preset voltage, so as to control the third switching component Q3 to be turned on and the fourth switching component Q4 to be turned off; the second zener diode D2 is further configured to be turned off when the power supply voltage is less than or equal to a second preset voltage, so as to control the third switching component Q3 to be turned off, the fourth switching component Q4 to be turned on, the first switching component Q1 to be turned on, and the second switching component Q2 to be turned off.
In this embodiment, the third switching component Q3 may be implemented by using a triode, a field effect transistor, etc., and the fourth switching component Q4 may be implemented by using a triode, a field effect transistor, etc. The overvoltage threshold of the second zener diode D2 is selected so that it can be broken down when the supply voltage is greater than or equal to the second preset voltage. For example, the third switching component Q3 is an NPN triode, the fourth switching component Q4 is an NPN triode, the second preset voltage is 23.6V, and the overvoltage threshold of the second zener diode D2 is 23.6V. When the input power voltage is greater than or equal to 23.6V, the second zener diode D2 is broken down, the third switching component Q3 is turned on, the first end (base) of the fourth switching component Q4 is grounded, and the fourth switching component Q4 is turned off, so that overvoltage detection of the first switching component Q1 and the second switching component Q2 is not affected.
When the input power voltage is less than 23.6V, the first zener diode D1 and the second zener diode D2 cannot be broken down, the third switching component Q3 is turned off, the first end (base) of the fourth switching component Q4 is connected to the power voltage, the fourth switching component Q4 is grounded, the first end (base) of the first switching component Q1 is grounded through the fourth switching component Q4, the first switching component Q1 is turned on, the power voltage is supplied to the gate of the second switching component Q2 through the first switching component Q1, at this time, the first switching component Q1 is turned off, and the output is at a low level, so as to drive the alarm device 130 to output the first alarm information and the second switching circuit 140 to output the abnormal signal.
In an embodiment, the first switching circuit 120 further includes a third zener diode D3. The cathode of the third zener diode D3 is electrically connected to the anode of the second zener diode D2, and the anode of the third zener diode D3 is electrically connected to the first end of the third switching component Q3. In this embodiment, the third zener diode D3 is selected to be matched with the second zener diode D2, so that stability can be further improved, and a fluctuation range of voltage can be reduced.
In an embodiment, the second switching circuit 140 includes a fifth switching part Q5 and a sixth switching part Q6. A first end of the fifth switching component Q5 is electrically connected to the output end of the first switching circuit 120, a second end of the fifth switching component Q5 is used for accessing the supply voltage, and a third end of the fifth switching component Q5 is grounded; the first end of the sixth switching component Q6 is used for accessing the power supply voltage, the second end of the sixth switching component Q6 is grounded, and the third end of the sixth switching component Q6 is the output end of the second switching circuit 140.
In this embodiment, the fifth switching component Q5 may be implemented by using a triode, a field effect transistor, or the like, the sixth switching component Q6 may be implemented by using a triode, a field effect transistor, or the like, and the supply voltage may be a supply voltage. For example, the third switching part Q3 is an NPN transistor, and the fourth switching part Q4 is an NPN transistor. When the output of the first switching circuit 120 is at the low level, the fifth switching component Q5 is turned off, the first terminal (base) of the sixth switching component Q6 is connected to the power supply voltage, the sixth switching component Q6 is turned on, a high level is output, and an abnormal signal is transmitted to the control circuit 150.
When the output of the first switching circuit 120 is at the high level, the fifth switching component Q5 is turned on, the first terminal (base) of the sixth switching component Q6 is grounded, the sixth switching component Q6 is turned off, and the low level is output.
Referring to fig. 4, the present application further provides a power management circuit, which includes a power circuit 200 and the alarm protection circuit 100 described above.
The detailed structure of the alarm protection circuit 100 can refer to the above embodiment, and will not be described herein; it can be understood that, since the alarm protection circuit 100 is used in the power management circuit of the present application, the embodiments of the power management circuit of the present application include all the technical schemes of all the embodiments of the alarm protection circuit 100, and the achieved technical effects are identical, and are not repeated herein.
In one embodiment, the number of power circuits 200 is plural, and the number of alarm protection circuits 100 is identical to the number of power circuits 200. The plurality of power supply circuits 200 are used to supply voltages or currents of different magnitudes. The alarm protection circuits 100 are electrically connected to the power supply circuits 200 in a one-to-one correspondence.
In one embodiment, the alarm protection circuit 100 can be flexibly set according to actual requirements. For example, when the power management circuit is electrically connected to the battery pack, the battery pack includes a plurality of battery packs, and the plurality of power circuits 200 can be electrically connected to the plurality of battery packs in a one-to-one correspondence manner, so that the plurality of alarm protection circuits 100 can detect the voltage of the battery packs in an overvoltage/undervoltage manner. When any one or more of the plurality of battery packs is over-voltage/under-voltage, corresponding alarm information can be output through the alarm protection circuit 100 correspondingly connected with the battery packs, so that a worker can conveniently determine the fault source and overhaul in time.
Hereinabove, the specific embodiments of the present application are described with reference to the accompanying drawings. Those skilled in the art will appreciate that various modifications and substitutions can be made to the application in its specific embodiments without departing from the spirit and scope of the application. Such modifications and substitutions are intended to be included within the scope of the present application.
Claims (10)
1. An alarm protection circuit, characterized in that the alarm protection circuit comprises:
The first end of the fuse is used for being connected with a power supply voltage;
The input end of the first switch circuit is electrically connected with the second end of the fuse; the first switch circuit is used for outputting a first protection signal when the power supply voltage is larger than a first preset voltage;
The alarm device is electrically connected with the output end of the first switch circuit; the alarm device is used for outputting first alarm information according to the first protection signal;
the input end of the second switching circuit is electrically connected with the output end of the first switching circuit; the second switch circuit is used for outputting an abnormal signal according to the first protection signal;
the control circuit is electrically connected with the output end of the second switch circuit; the control circuit is also used for cutting off the power supply voltage according to the abnormal signal.
2. The alarm protection circuit of claim 1, wherein the control circuit is further configured to be electrically connected to a power supply circuit, and wherein the control circuit is configured to control the power supply circuit to stop operating according to the abnormality signal to stop outputting the power supply voltage.
3. The alarm protection circuit of claim 2, wherein the alarm protection circuit further comprises a third switching circuit;
The first end of the third switching circuit is electrically connected with the output end of the second switching circuit, and the second end of the third switching circuit is electrically connected with the control circuit; the third switch circuit is used for being conducted according to the abnormal signal.
4. The alarm protection circuit of claim 1, wherein the first switching circuit comprises a first switching component, a second switching component, a first zener diode, a first resistor, and a second resistor;
The first end and the second end of the first switch component are electrically connected with the second end of the fuse, and the third end of the first switch component is electrically connected with the first end of the second switch component; the first end of the first switch component is also electrically connected with the cathode of the first zener diode, and the anode of the first zener diode is grounded;
A second end of the second switch component is electrically connected with a second end of the fuse, and a third end of the second switch component is electrically connected with a first end of the second switch component;
A first end of the first resistor is electrically connected with a second end of the second switch component, and a second end of the first resistor is electrically connected with a first end of the second switch component; the first end of the second resistor is electrically connected with the first end of the second switch component, and the second end of the second resistor is grounded.
5. The alarm protection circuit of claim 4, wherein the first switching circuit is further configured to output a second protection signal when the power supply voltage is less than a second preset voltage; the second preset voltage is smaller than the first preset voltage;
The alarm device is also used for outputting second alarm information according to the second protection signal;
The second switch circuit is further used for outputting the abnormal signal according to the second protection signal.
6. The alarm protection circuit of claim 5, wherein the first switching circuit further comprises a third switching component, a fourth switching component, and a second zener diode;
The cathode of the second zener diode is electrically connected with the second end of the fuse, and the anode of the second zener diode is electrically connected with the first end of the third switch component; the second end of the third switch component is electrically connected with the first end of the fourth switch component, and the third end of the third switch component is grounded; the first end of the fourth switching component is also electrically connected with the second end of the fuse, the second end of the fourth switching component is electrically connected with the first end of the first switching component, and the third end of the fourth switching component is grounded.
7. The alarm protection circuit of claim 6, wherein the first switching circuit further comprises a third zener diode;
The negative electrode of the third zener diode is electrically connected with the positive electrode of the second zener diode, and the positive electrode of the third zener diode is electrically connected with the first end of the third switch component.
8. The alarm protection circuit of claim 1, wherein the second switching circuit comprises a fifth switching component and a sixth switching component;
The first end of the fifth switch component is electrically connected with the output end of the first switch circuit, the second end of the fifth switch component is used for accessing the power supply voltage, and the third end of the fifth switch component is grounded; the first end of the sixth switching component is used for being connected with the power supply voltage, the second end of the sixth switching component is grounded, and the third end of the sixth switching component is an output end of the second switching circuit.
9. A power management circuit comprising a power circuit and an alarm protection circuit as claimed in any one of claims 1 to 8.
10. The power management circuit according to claim 9, wherein the number of the power circuits is plural, and the number of the alarm protection circuits is identical to the number of the power circuits;
And the alarm protection circuits are used for being electrically connected with the power supply circuits in a one-to-one correspondence manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322722648.7U CN221177259U (en) | 2023-10-10 | 2023-10-10 | Alarm protection circuit and power management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322722648.7U CN221177259U (en) | 2023-10-10 | 2023-10-10 | Alarm protection circuit and power management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221177259U true CN221177259U (en) | 2024-06-18 |
Family
ID=91459458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322722648.7U Active CN221177259U (en) | 2023-10-10 | 2023-10-10 | Alarm protection circuit and power management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221177259U (en) |
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2023
- 2023-10-10 CN CN202322722648.7U patent/CN221177259U/en active Active
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