CN115980619A - Power supply voltage detection method, circuit, electronic equipment and storage medium - Google Patents
Power supply voltage detection method, circuit, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN115980619A CN115980619A CN202310057829.4A CN202310057829A CN115980619A CN 115980619 A CN115980619 A CN 115980619A CN 202310057829 A CN202310057829 A CN 202310057829A CN 115980619 A CN115980619 A CN 115980619A
- Authority
- CN
- China
- Prior art keywords
- voltage
- logic circuit
- power supply
- detection
- detection signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention provides a power supply voltage detection method, a circuit, an electronic device and a storage medium, wherein the method comprises the following steps: initializing an interface of the singlechip, and entering a main program; inputting an interrupt detection signal to a voltage detection port; outputting a voltage detection signal according to the interrupt detection signal; and acquiring the voltage detection signal to identify the system power supply voltage range of the product to be detected, so as to realize the detection of the system power supply voltage. The invention innovatively adopts two low-power consumption comparators to compare the system voltage, then adopts a wire and mode to output a signal for the detection of the singlechip, and can achieve the aim of accurately detecting the set voltage range by detecting the output signal of the circuit through the interrupt port no matter whether the MCU is in a sleep mode or a Normal mode at present, thereby reducing the consumption of the standby current of the system and improving the real-time property and the stability of the voltage detection.
Description
Technical Field
The invention relates to the field of production, manufacturing and testing, in particular to a power supply voltage detection method, a circuit, electronic equipment and a storage medium.
Background
At present, in automobile body domain controllers, automobile sound navigation and other automobile electronic products, detection of system power supply voltage is generally carried out through an ADC (analog-to-digital converter) port of a single-chip Microcomputer (MCU), if the mode is adopted, after the system enters a Sleep mode, the system needs to be continuously switched between the Sleep mode and a Normal mode, because the voltage detection of the ADC port can only be carried out under the condition that the single-chip microcomputer is in a non-Sleep mode, the single-chip microcomputer needs to continuously poll the input voltage of the ADC port under the non-Sleep mode, the standby current of the system is increased, meanwhile, the real-time performance of system power supply detection is also reduced, and the requirement of a host factory on the standby current of a single ECU is more and more stringent under the condition that the development trend that the degree of electrification of the vehicle is continuously improved cannot be met.
The existing detection of system power supply voltage has the following technical problems: in the system Sleep mode, the voltage cannot be detected. If the system is required to detect the voltage in the Sleep mode, the single chip microcomputer needs to be continuously switched between the Sleep mode and the Normal mode, the standby current of the system is large, and the real-time performance of voltage detection is low.
Disclosure of Invention
In view of the above, the present invention provides a method, a circuit, an electronic device and a storage medium for detecting a power supply voltage, which can accurately detect a voltage range of a system power supply voltage in a sleep mode or a Normal mode of a single chip microcomputer detection unit, reduce consumption of a system standby current, and improve real-time performance and stability of voltage detection.
A method of supply voltage detection, the method comprising:
s100: initializing the interface of the singlechip and entering a main program.
S200: an interrupt detection signal is input to the voltage detection port.
S300: and outputting a voltage detection signal according to the interruption detection signal.
S400: and acquiring the voltage detection signal to identify the system power supply voltage range of the product to be detected, so as to realize the detection of the system power supply voltage.
Furthermore, the voltage detection port is a middle fracture port of the single chip microcomputer.
The voltage detection port is connected with the first logic circuit and the second logic circuit in a logic mode through wires.
In the technical scheme, because the detection of the system power supply voltage in the prior art is generally performed through the ADC port of the single chip, if the system enters the Sleep mode, the system needs to be continuously switched between the Sleep mode and the Normal mode, because the voltage detection performed by the ADC port can only be performed when the single chip is in the non-Sleep mode, the single chip needs to continuously poll the input voltage of the ADC port in the non-Sleep mode, so as to increase the standby current of the system, and reduce the real-time performance of the system power supply detection.
Further, the step S200 specifically includes:
s201: an input voltage is simulated to the first logic circuit and the second logic circuit, respectively.
S202: when the input voltage of the first logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, an interrupt detection signal of a low level is output.
When the input voltage of the second logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, an interrupt detection signal of a low level is output.
Preferably, the first logic circuit is a low voltage comparison circuit.
Preferably, the second logic circuit is a high voltage comparison circuit.
Preferably, the first threshold is a low voltage threshold Ulow; the second threshold is a high voltage threshold Uhigh.
It should be understood that the threshold value may be adjusted by modifying the value of the divider resistance.
Further, the preset voltage range is formed by a first threshold value of the first logic circuit and a second threshold value of the second logic circuit; the first threshold value is less than the second threshold value.
Further, the step S300 specifically includes: outputting a high-level voltage detection signal when the first logic circuit and the second logic circuit both input a high-level interrupt detection signal; otherwise, a low level voltage detection signal is output.
Further, the step S400 specifically includes: and when the voltage detection signal is in a high level, the system power supply voltage of the product to be detected is within a preset voltage range, otherwise, the system power supply voltage of the product to be detected is outside the preset voltage range.
In the above technical solution, in order to identify the input range of the system power voltage Ua of the product to be tested, the low voltage comparison circuit and the high voltage comparison circuit are connected in a logic and gate manner, and the analog system power voltage is input into Ua1 and Ua2 in the low voltage comparison circuit and the high voltage comparison circuit, so that the low voltage comparison circuit and the high voltage comparison circuit output logic signals respectively, which are denoted as logic output 1 and logic output 2, and further, output signals through the logic and gate are denoted as line and output, and the relationship is as follows:
for example, the design of Ulow is 6V and uhigh is 18V, when the voltage is in the range of 6-18V, the line and output end output high level, and the other voltages output low level, the MCU (single chip microcomputer detection unit) can rapidly recognize the change of the line and output level through the interrupt pin under Normal power supply condition, no matter in sleep mode or Normal mode, and switch the sleep/Normal operation mode accordingly, or enter the corresponding interrupt processing subroutine.
As another preferred aspect, the present invention further provides a detection circuit for detecting a power supply voltage, where the detection circuit at least includes: the hardware voltage range detection unit is connected with a main power supply and the singlechip module; the hardware voltage range detection unit is also connected with an interrupt port of the singlechip module; the hardware voltage range detection unit at least comprises: the first logic circuit and the second logic circuit are connected in a wired and logic mode; the line and the output port of the hardware voltage range detection unit are connected with the middle fracture; and the main power supply is respectively connected with the input ports of the first logic circuit and the second logic circuit.
Preferably, the first logic circuit is a low voltage comparison circuit; the second logic circuit is a high voltage comparison circuit; the main power supply is an automobile battery; wherein, the automobile battery is connected with an anti-reverse connection circuit; the single chip microcomputer detection unit is connected with the LDO power supply; the automobile battery inputs voltage into the low-voltage comparison circuit, the high-voltage comparison circuit and the LDO power supply, and the LDO power supply inputs the voltage into the single chip microcomputer detection unit.
In the above technical solution, the analog system power supply voltage is input into Ua1 and Ua2 respectively at the low voltage comparison circuit and the high voltage comparison circuit, so that the low voltage comparison circuit and the high voltage comparison circuit output logic signals respectively, which are recorded as logic output 1 and logic output 2, and further output the signals through a logic and gate, which are recorded as line and output.
Further, the first logic circuit and the second logic circuit are respectively provided with a threshold adjusting resistor and a low power consumption comparator.
The threshold adjusting resistor is used for adjusting a first threshold value of the first logic circuit and a second threshold value of the second logic circuit.
The low power consumption comparator is used for comparing the input voltages of the first logic circuit and the second logic circuit with a first threshold value and a second threshold value respectively and outputting interrupt detection signals respectively.
Preferably, the first threshold is a low voltage threshold value Ulow; the second threshold is a high voltage threshold Uhigh.
As another preferable aspect, the present invention also provides an electronic device including the detection circuit as described above.
As another preference, the present invention also provides a storage medium located at an arbitrary control unit, the storage medium including a computer program executable by a processor, the computer program being for executing the power supply voltage detection method as described above.
Compared with the prior art, the invention has the beneficial effects that:
the technical innovation is that two low-power consumption comparators are adopted to compare system voltage, and then signals for detection of a single chip microcomputer are output in a wired-AND mode, so that the purpose of accurately detecting a set voltage range can be achieved by detecting output signals of the circuit through an interrupt port regardless of whether the MCU is in a sleep mode or a Normal mode currently; compared with the current mode of detecting the system voltage through the AD port of the single chip microcomputer, the voltage range of the system can be detected in the sleep mode of the system, the single chip microcomputer is not required to be frequently switched between sleep and Normal, the consumption of the standby current of the system is reduced, the instantaneity of voltage detection and the stability of the system are improved, and the requirements of a host factory on the standby current of a single ECU (electronic control unit) are more and more strict under the development trend that the electrification degree of a vehicle is continuously improved.
Drawings
Fig. 1 is a flowchart of a power supply voltage detection method according to the present invention.
Fig. 2 is a schematic diagram of a power supply voltage detection circuit according to the present invention.
FIG. 3 is a circuit diagram of a hardware voltage range detection unit according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Referring to fig. 1, in a preferred embodiment, a method for detecting a power supply voltage includes:
s100: initializing the interface of the singlechip and entering a main program.
S200: an interrupt detection signal is input to the voltage detection port.
S300: and outputting a voltage detection signal according to the interruption detection signal.
S400: and acquiring the voltage detection signal to identify the system power supply voltage range of the product to be detected, so as to realize the detection of the system power supply voltage.
In some embodiments, the voltage detection port is a middle fracture port of the single chip microcomputer.
The voltage detection port is connected with the first logic circuit and the second logic circuit in a logic mode through wires.
In the specific implementation process, because the detection of the system power supply voltage in the prior art is generally performed through an ADC port of the single chip, if the system enters the Sleep mode, the system needs to be continuously switched between the Sleep mode and the Normal mode, because the voltage detection performed by the ADC port can only be performed when the single chip is in the non-Sleep mode, the single chip needs to continuously poll the input voltage of the ADC port in the non-Sleep mode, so as to increase the standby current of the system, and reduce the real-time performance of the system power supply detection.
In some embodiments, the step S200 specifically includes:
s201: an input voltage is simulated to the first logic circuit and the second logic circuit, respectively.
S202: when the input voltage of the first logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, an interrupt detection signal of a low level is output.
When the input voltage of the second logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, an interrupt detection signal of a low level is output.
Preferably, the first logic circuit is a low voltage comparison circuit.
Preferably, the second logic circuit is a high voltage comparison circuit.
Preferably, the first threshold is a low voltage threshold value Ulow; the second threshold is a high voltage threshold Uhigh.
It should be understood that the threshold value may be adjusted by modifying the value of the divider resistance.
In some embodiments, the preset voltage range is comprised of a first threshold value of the first logic circuit and a second threshold value of the second logic circuit; the first threshold value is less than the second threshold value.
In some embodiments, the step S300 specifically includes: outputting a high-level voltage detection signal when the first logic circuit and the second logic circuit both input a high-level interrupt detection signal; otherwise, a low level voltage detection signal is output.
In some embodiments, the step S400 specifically includes: and when the voltage detection signal is at a high level, the system power supply voltage of the product to be detected is within a preset voltage range, otherwise, the system power supply voltage of the product to be detected is outside the preset voltage range.
In the specific implementation process, in order to identify the input range of the system power supply voltage Ua of the product to be tested, the low-voltage comparison circuit and the high-voltage comparison circuit are connected in a logic and gate manner, and the analog system power supply voltage is respectively input into Ua1 and Ua2 in the low-voltage comparison circuit and the high-voltage comparison circuit, so that the low-voltage comparison circuit and the high-voltage comparison circuit respectively output logic signals, which are marked as logic output 1 and logic output 2, and further output signals through the logic and gate are marked as line and output, and the relationship is as follows:
illustratively, the design Ulow is 6V, uhigh is 18V, when the voltage is in the range of 6-18V, the line and the output end output high level, and the other voltages output low level, the MCU (single chip microcomputer detection unit) can rapidly identify the change of the line and the output level through the interrupt pin under the Normal power supply condition, no matter in sleep mode or Normal, and switch the sleep/Normal operation mode accordingly, or enter the corresponding interrupt processing subroutine.
Referring to fig. 2 to fig. 3, as another preferred embodiment, the present invention further provides a detection circuit for detecting a power supply voltage, where the detection circuit at least includes: the hardware voltage range detection unit is connected with a main power supply and the singlechip module; the hardware voltage range detection unit is also connected with an interrupt port of the singlechip module; the hardware voltage range detection unit at least comprises: the first logic circuit and the second logic circuit are connected in a wired and logical mode; the wire and the output port of the hardware voltage range detection unit are connected with the middle fracture; and the main power supply is respectively connected with the input ports of the first logic circuit and the second logic circuit.
Preferably, the first logic circuit is a low voltage comparison circuit; the second logic circuit is a high voltage comparison circuit; the main power supply is an automobile battery; wherein, the automobile battery is connected with an anti-reverse connection circuit; the single chip microcomputer detection unit is connected with the LDO power supply; the automobile battery inputs voltage into the low-voltage comparison circuit, the high-voltage comparison circuit and the LDO power supply, and the LDO power supply inputs the voltage into the single chip microcomputer detection unit.
In a specific implementation process, the analog system power supply voltage is respectively input into Ua1 and Ua2 at the low voltage comparison circuit and the high voltage comparison circuit, so that the low voltage comparison circuit and the high voltage comparison circuit respectively output logic signals, which are recorded as logic output 1 and logic output 2, and further output signals through a logic and gate, which are recorded as line and output.
In some embodiments, the first logic circuit and the second logic circuit are respectively provided with a threshold adjusting resistor and a low power consumption comparator.
The threshold adjusting resistor is used for adjusting a first threshold value of the first logic circuit and a second threshold value of the second logic circuit.
The low power consumption comparator is used for comparing the input voltages of the first logic circuit and the second logic circuit with a first threshold value and a second threshold value respectively and outputting interrupt detection signals respectively.
Preferably, the first threshold is a low voltage threshold Ulow; the second threshold is a high voltage threshold Uhigh.
In a specific implementation process, the hardware voltage range detection unit in fig. 2 may be implemented by the circuit in fig. 3; the first logic circuit adopts a Ulow threshold adjusting resistor, the second logic circuit adopts a Uhigh threshold adjusting resistor, and the low-power comparator adopts TS3702ID.
As another preferable aspect, the present invention also provides an electronic device including the detection circuit as described above.
As another preference, the present invention also provides a storage medium located at any control unit, the storage medium including a computer program executable by a processor, the computer program being for executing the power supply voltage detection method as described above.
Compared with the prior art, the invention has the beneficial effects that:
the technical innovation is that two low-power consumption comparators are adopted to compare system voltage, and then signals for detection of a single chip microcomputer are output in a wired-AND mode, so that the purpose of accurately detecting a set voltage range can be achieved by detecting output signals of the circuit through an interrupt port regardless of whether the MCU is in a sleep mode or a Normal mode currently; compared with the current mode of detecting the system voltage through the AD port of the single chip microcomputer, the voltage range of the system can be detected in the sleep mode of the system, the single chip microcomputer is not required to be frequently switched between sleep and Normal, the consumption of the standby current of the system is reduced, the instantaneity of voltage detection and the stability of the system are improved, and the requirements of a host factory on the standby current of a single ECU (electronic control unit) are more and more strict under the development trend that the electrification degree of a vehicle is continuously improved.
Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The various system and method embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some of the modules according to embodiments of the present invention. The present invention can also be embodied as system programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
In the several embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of functions is merely a logical division, and other divisions may be realized in practice, for example, multiple tools or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (10)
1. A method of detecting a supply voltage, the method comprising:
s100: initializing an interface of the singlechip and entering a main program;
s200: inputting an interrupt detection signal to the voltage detection port;
s300: outputting a voltage detection signal according to the interrupt detection signal;
s400: and acquiring the voltage detection signal to identify the system power supply voltage range of the product to be detected, thereby realizing the detection of the system power supply voltage.
2. The power supply voltage detection method according to claim 1,
the voltage detection port is a middle fracture port of the single chip microcomputer;
the voltage detection port is connected with the first logic circuit and the second logic circuit in a logic mode through wires.
3. The power supply voltage detection method according to claim 2, wherein the step S200 specifically includes:
s201: simulating input voltages to the first logic circuit and the second logic circuit, respectively;
s202: when the input voltage of the first logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, outputting a low-level interrupt detection signal;
when the input voltage of the second logic circuit meets a preset voltage range, inputting a high-level interrupt detection signal to the voltage detection port; otherwise, an interrupt detection signal of a low level is output.
4. The power supply voltage detection method according to claim 3, wherein the preset voltage range is constituted by a first threshold value of the first logic circuit and a second threshold value of the second logic circuit; the first threshold value is less than the second threshold value.
5. The method according to claim 4, wherein the step S300 specifically includes:
outputting a high-level voltage detection signal when the first logic circuit and the second logic circuit both input a high-level interrupt detection signal; otherwise, a low level voltage detection signal is output.
6. The power supply voltage detection method according to claim 5, wherein the step S400 specifically includes:
and when the voltage detection signal is at a high level, the system power supply voltage of the product to be detected is within a preset voltage range, otherwise, the system power supply voltage of the product to be detected is outside the preset voltage range.
7. A detection circuit using the power supply voltage detection method according to any one of claims 1 to 6, characterized in that the detection circuit comprises at least:
the hardware voltage range detection unit is connected with a main power supply and the singlechip module;
the hardware voltage range detection unit is also connected with an interrupt port of the singlechip module;
the hardware voltage range detection unit at least comprises:
the first logic circuit and the second logic circuit are connected in a wired and logic mode;
the line and the output port of the hardware voltage range detection unit are connected with the middle fracture;
and the main power supply is respectively connected with the input ports of the first logic circuit and the second logic circuit.
8. The detection circuit of claim 7, wherein the first logic circuit and the second logic circuit are respectively provided with a threshold adjustment resistor and a low power consumption comparator;
the threshold adjusting resistor is used for adjusting a first threshold value of the first logic circuit and a second threshold value of the second logic circuit;
the low power consumption comparator is used for comparing the input voltages of the first logic circuit and the second logic circuit with a first threshold value and a second threshold value respectively and outputting interrupt detection signals respectively.
9. An electronic device, characterized in that the electronic device comprises a detection circuit according to any of claims 7-8.
10. A storage medium at any control unit, the storage medium comprising a computer program executable by a processor, the computer program being adapted to perform the supply voltage detection method according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057829.4A CN115980619A (en) | 2023-01-17 | 2023-01-17 | Power supply voltage detection method, circuit, electronic equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057829.4A CN115980619A (en) | 2023-01-17 | 2023-01-17 | Power supply voltage detection method, circuit, electronic equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115980619A true CN115980619A (en) | 2023-04-18 |
Family
ID=85966683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310057829.4A Pending CN115980619A (en) | 2023-01-17 | 2023-01-17 | Power supply voltage detection method, circuit, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115980619A (en) |
-
2023
- 2023-01-17 CN CN202310057829.4A patent/CN115980619A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9733696B2 (en) | Dynamic low power states characterization | |
| CN205721762U (en) | The interface circuit of general-purpose serial bus USB interface and portable terminal | |
| US8443130B2 (en) | USB port detecting circuit | |
| US20150268678A1 (en) | System and method for current management in a portable device | |
| WO2008109331A1 (en) | Detecting connection to a usb host or hub without using an extra status input | |
| US20150137820A1 (en) | Battery fuel gauges using fet segment control to increase low current measurement accuracy | |
| US8629680B2 (en) | Central processing unit test system | |
| CN102841319A (en) | Battery voltage monitoring method based on BMC (baseboard management controller) | |
| US8200997B2 (en) | Computer wake up circuit includes a switch configured to prevent a control signals from an I/O controller being transmitted to south-bridge | |
| CN101334429A (en) | Surge electric current test circuit | |
| US7675447B1 (en) | Low-cost and noise-insensitive motion detector | |
| CN115980619A (en) | Power supply voltage detection method, circuit, electronic equipment and storage medium | |
| US7459903B1 (en) | Multi-level voltage detection circuit | |
| CN114142550A (en) | Control method and device of energy storage device and energy storage device | |
| CN104184449A (en) | Capacitive touch control apparatus, method, and system | |
| US8519697B2 (en) | Apparatus and method for detecting mode change in an electronic device | |
| CN109709373B (en) | Signal self-adaptive acquisition circuit and acquisition method | |
| CN109725671A (en) | Strengthen the circuit and method of load transient response compensation | |
| US20130328580A1 (en) | Test circuit for power supply unit | |
| KR101000259B1 (en) | A Input Switch Circuit with Voltage Divide Resisters in Automobile Which has Reference Voltage, and Method Thereof | |
| CN210351233U (en) | Circuit breaker, cabinet and system | |
| CN109213040B (en) | Control circuit, electronic device and control method thereof | |
| CN107478948B (en) | USB load detection circuit and detection method | |
| WO2020140500A1 (en) | Analogue watchdog apparatus and control method therefor | |
| CN213069106U (en) | Battery voltage detection circuit structure capable of avoiding power consumption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |