CN219496514U - Alternating current detection circuit structure, circuit board and charger - Google Patents
Alternating current detection circuit structure, circuit board and charger Download PDFInfo
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- CN219496514U CN219496514U CN202320620354.0U CN202320620354U CN219496514U CN 219496514 U CN219496514 U CN 219496514U CN 202320620354 U CN202320620354 U CN 202320620354U CN 219496514 U CN219496514 U CN 219496514U
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- 238000005070 sampling Methods 0.000 claims abstract description 93
- 239000000758 substrate Substances 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model is suitable for the technical field of electronic circuits, and particularly provides an alternating current detection circuit structure, a circuit board and a charger, wherein the structure comprises a rectification voltage dividing circuit which is connected with an alternating current power supply and used for converting and dividing an electric signal of the alternating current power supply to obtain a sampling signal and outputting the sampling signal; the frequency sampling circuit is connected with the rectification voltage division circuit, receives the sampling signal and outputs a detection signal with the same frequency as the sampling signal to the rear end controller; the voltage detection circuit is connected with the rectification voltage division circuit and the frequency sampling circuit, receives the sampling signal, and outputs an adjusting signal corresponding to the sampling signal to the frequency sampling circuit so as to adjust or maintain the frequency of the detection signal. The utility model can control the stop work when determining that the alternating current power supply does not meet the use requirement, thereby avoiding the situation that the alternating current power supply cannot work normally or even is damaged in an environment which does not meet the standard.
Description
Technical Field
The utility model belongs to the technical field of electronic circuits, and particularly relates to an alternating current detection circuit structure, a circuit board and a charger.
Background
The electrical equipment needs to work normally within a certain voltage and frequency range. Because of different power grid standards in different countries or regions, when an electric appliance with one country or region standard is applied to another country or region, the electric appliance can not work normally or even damage due to voltage or frequency mismatch.
Disclosure of Invention
The utility model provides an alternating current detection circuit structure, which solves the problem that the existing electrical equipment cannot be used or even damaged under the condition of voltage or frequency non-adaptation.
The utility model is realized in that an alternating current detection circuit structure comprises:
the rectification voltage division circuit is connected with the alternating current power supply and used for converting and dividing the electric signal of the alternating current power supply to obtain a sampling signal and outputting the sampling signal;
the frequency sampling circuit is connected with the rectification voltage division circuit, receives the sampling signal and outputs a detection signal with the same frequency as the sampling signal to the rear end controller;
the voltage detection circuit is connected with the rectification voltage division circuit and the frequency sampling circuit, receives the sampling signal, and outputs an adjusting signal corresponding to the sampling signal to the frequency sampling circuit so as to adjust or maintain the frequency of the detection signal.
Optionally, the voltage detection circuit is configured to output an adjustment signal of a first preset level to the frequency sampling circuit when the sampling signal meets a preset standard, so as to maintain the frequency of the detection signal.
Optionally, the voltage detection circuit is configured to output an adjustment signal of a second preset level to the frequency sampling circuit when the sampling signal does not meet the preset standard, so as to adjust the frequency of the detection signal.
Optionally, the preset standard is a voltage and frequency standard of the power grid where the preset area is located.
Optionally, the rectifying voltage dividing circuit includes a first diode, a first resistor, a second resistor, and a third resistor;
the anode of the first diode is connected with one end of the output of the alternating current power supply, and the cathode of the first diode is connected with one end of the first resistor;
the other end of the first resistor is connected with one end of the second resistor and one end of the third resistor;
the other end of the third resistor is connected with the frequency sampling circuit and the voltage detection circuit;
the other end of the second resistor is connected with the two output ends of the alternating current power supply and grounded.
Optionally, the frequency sampling circuit includes a first comparator, a fourth resistor, and a fifth resistor;
the non-inverting input end of the first comparator is connected with the rectifying voltage dividing circuit, the inverting input end of the first comparator is connected with one end of the fourth resistor, and the output end of the first comparator is connected with one end of the fifth resistor;
the other end of the fifth resistor is connected with the back-end controller;
the other end of the fourth resistor is grounded.
Optionally, the voltage detection circuit includes a second comparator, a sixth resistor, a seventh resistor, and a second diode;
the reverse input end of the second comparator is connected with the rectifying voltage-dividing circuit, the non-inverting input end of the second comparator is connected with one end of the sixth resistor and one end of the seventh resistor, and the output end of the second comparator is connected with the cathode of the second diode;
the other end of the sixth resistor is connected with one end of the fourth resistor;
the other end of the seventh resistor is connected with the first voltage end;
the anode of the second diode is connected with the other end of the fifth resistor.
In a second aspect, the present application further provides a circuit board, including:
a PCB substrate; and
the alternating current detection circuit structure is arranged on the PCB substrate.
Optionally, a control chip is arranged on the PCB substrate, and the control chip is a back-end controller connected with the output end of the frequency sampling circuit.
In a third aspect, the present application further provides a charger, including a circuit board as described above.
The utility model has the advantages that the sampling signal is obtained by converting and dividing the electric signal of the alternating current power supply through the rectification voltage dividing circuit, then the frequency sampling circuit outputs the detection signal with the same frequency as the sampling signal to the rear end controller, and meanwhile, the voltage detection circuit outputs the adjusting signal corresponding to the sampling signal to the frequency sampling circuit so as to adjust or maintain the frequency of the detection signal. When the voltage of the alternating current power supply meets the standard, the frequency of the detection signal is unchanged, and at the moment, the back-end controller determines that the connected alternating current power supply meets the use requirement according to the frequency of the detection signal, so that the device can work normally. When the frequency of the alternating current power supply does not meet the standard, the back end controller determines that the alternating current power supply does not meet the use requirement according to the frequency, or when the voltage of the alternating current power supply does not meet the standard, the back end controller adjusts the frequency of the detection signal, at the moment, determines that the alternating current power supply does not meet the use requirement according to the frequency of the detection signal, and can control to stop working, so that the situation that normal working is impossible or even damage occurs in an environment which does not meet the standard is avoided.
Drawings
FIG. 1 is a schematic block diagram of one embodiment of an AC power detection circuit configuration of the present application;
FIG. 2 is a schematic circuit diagram of one embodiment of an AC detection circuit configuration of the present application;
FIG. 3 is a schematic diagram of simulated output waveforms for one embodiment of an AC detection circuit configuration of the present application;
fig. 4 is a schematic diagram of a simulated output waveform of another embodiment of the ac power detection circuit structure of the present application.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
According to the embodiment of the utility model, when the voltage of the alternating current power supply meets the standard, the frequency of the detection signal is unchanged, and the back-end controller determines that the connected alternating current power supply meets the use requirement according to the frequency of the detection signal, so that the device can work normally. When the frequency of the alternating current power supply does not meet the standard, the back end controller determines that the alternating current power supply does not meet the use requirement according to the frequency, or when the voltage of the alternating current power supply does not meet the standard, the back end controller adjusts the frequency of the detection signal, at the moment, determines that the alternating current power supply does not meet the use requirement according to the frequency of the detection signal, and can control to stop working, so that the situation that normal working is impossible or even damage occurs in an environment which does not meet the standard is avoided.
Example 1
As shown in fig. 1 to 2, the present embodiment provides an ac power detection circuit structure including:
the rectification voltage division circuit 100 is connected with the alternating current power supply Vin and is used for converting and dividing an electric signal of the alternating current power supply Vin to obtain a sampling signal and outputting the sampling signal;
the frequency sampling circuit 200 is connected with the rectification voltage division circuit 100, receives the sampling signal, and outputs a detection signal with the same frequency as the sampling signal to the back-end controller U1;
the voltage detection circuit 300 is connected to the rectification voltage division circuit 100 and the frequency sampling circuit 200, receives the sampling signal, and outputs an adjustment signal corresponding to the sampling signal to the frequency sampling circuit 200 to adjust or maintain the frequency of the detection signal.
In practice, the ac power source Vin may be considered as mains. The utility grid used in different countries or regions has different standards, for example, the grid in the united states is 110VAC, 60HZ, and the grid used in australia is 230VAC, 50HZ.
Alternatively, the rectification voltage-dividing circuit 100 is connected to the ac power source Vin, so that the rectification voltage-dividing circuit 100 can receive the electrical signal of the ac power source Vin, and convert and divide the electrical signal to obtain the sampling signal. In some embodiments, converting and dividing the electrical signal refers to converting the alternating current into the direct current and then dividing the direct current, so that a large voltage can be converted into a small voltage sampling signal, which is convenient for a subsequent circuit to process.
The large voltage is a voltage greater than the set voltage value, and the small voltage is a voltage less than the set voltage value. Illustratively, a set voltage value of 36V is taken as an example, and a voltage greater than 36V is a large voltage and a voltage less than 36V is a small voltage. Of course, in other embodiments, the large voltage and the small voltage may be defined by other values, which are not specifically limited herein.
Alternatively, the frequency sampling circuit 200 is connected to the rectifying and voltage dividing circuit 100 so as to receive the sampling signal output from the rectifying and voltage dividing circuit 100, and then the frequency sampling circuit 200 outputs the detection signal to the back-end controller U1. In practice, the detection signal is at the same frequency as the sampling signal.
Alternatively, the voltage detection circuit 300 is connected to the rectifying and voltage dividing circuit 100 and the frequency sampling circuit 200, the voltage detection circuit 300 receives the sampling signal output by the rectifying and voltage dividing circuit 100, and then the voltage detection circuit 300 outputs an adjustment signal corresponding to the sampling signal to the frequency sampling circuit 200, and the frequency of the detection signal may be changed or unchanged according to different adjustment signals.
In some embodiments, taking the voltage and the frequency of the ac power source Vin as a1 and a2, respectively, the rectification voltage-dividing circuit 100 converts and divides the ac power source Vin to obtain a sampling signal, where the voltage and the frequency of the sampling signal are a3 and a2, respectively, so that the frequency of the detection signal output by the frequency sampling circuit 200 is a2. The voltage detection circuit 300 outputs an adjustment signal corresponding to the sampling signal, and when the voltage a3 of the sampling signal meets a set condition, for example, when the voltage a3 of the sampling signal is within a set voltage range, the adjustment signal output by the voltage detection circuit 300 is used to maintain the frequency of the detection signal, that is, the frequency of the detection signal is a2 at this time. The back-end controller U1 receives the detection signal and then determines whether the ac power Vin is applicable according to the frequency of the detection signal.
In some alternative embodiments, the voltage detection circuit 300 is configured to output an adjustment signal of a first preset level to the frequency sampling circuit 200 to maintain the frequency of the detection signal when the sampling signal meets a preset standard.
Optionally, the voltage detection circuit 300 is configured to output an adjustment signal of a second preset level to the frequency sampling circuit 200 to adjust the frequency of the detection signal when the sampling signal does not meet the preset standard. Optionally, the preset standard is a voltage and frequency standard of the power grid where the preset area is located.
Illustratively, taking the voltage and frequency of the product applicable to the X region as an example, the grid voltage and frequency of the X region are 110VAC and 60HZ, respectively. When the product is used in the region X, the voltage and the frequency of the ac power source Vin are 110VAC and 60HZ respectively, at this time, the frequency of the detection signal output by the frequency sampling circuit 200 is 60HZ, and at the same time, the adjustment signal output by the voltage detection circuit 300 maintains the frequency of the detection signal, and the rear end controller U1 recognizes that the frequency is 60HZ, so as to control the subsequent circuit to work normally. For example, when the product is a charger, the charging circuit may be normally started.
When the product is used in the Y region, the voltage and the frequency of the power grid in the Y region are 230VAC and 60HZ respectively, at this time, the voltage and the frequency of the alternating current power supply Vin are 230VAC and 60HZ respectively, the frequency of the detection signal output by the frequency sampling circuit 200 is 60HZ, and meanwhile, the adjusting signal output by the voltage detection circuit 300 is used for adjusting the frequency of the detection signal, so that the rear end controller U1 recognizes that the frequency is not 60HZ, the subsequent circuit is controlled to stop working, the product cannot work in an inapplicable environment, and the product can be prevented from being damaged. For example, the charger does not start the charging circuit, does not charge, and does not cause damage to the charging circuit.
When the product is used in the Z region, the voltage and the frequency of the power grid in the Z region are 110VAC and 50HZ respectively, at this time, the voltage and the frequency of the alternating current power supply Vin are 110VAC and 50HZ respectively, the frequency of the detection signal output by the frequency sampling circuit 200 is 50HZ, and meanwhile, the adjusting signal output by the voltage detection circuit 300 is used for maintaining the frequency of the detection signal, so that the rear end controller U1 recognizes that the frequency is 50HZ instead of 60HZ, the subsequent circuit is controlled to stop working, the product can not work in an inapplicable environment, and the product damage can be avoided.
The present application converts and divides the electric signal of the ac power Vin to obtain a sampling signal by the rectifying and voltage dividing circuit 100, and then the frequency sampling circuit 200 outputs a detection signal with the same frequency as the sampling signal to the back-end controller U1, and at the same time, the voltage detecting circuit 300 outputs an adjusting signal corresponding to the sampling signal to the frequency sampling circuit 200 to adjust or maintain the frequency of the detection signal. When the voltage of the alternating current power supply Vin meets the standard, the frequency of the detection signal is unchanged, and at the moment, the back-end controller U1 determines that the connected alternating current power supply Vin meets the use requirement according to the frequency of the detection signal, so that the device can work normally. When the frequency of the alternating current power supply Vin does not meet the standard, the back end controller U1 determines that the alternating current power supply Vin does not meet the use requirement according to the frequency, or when the voltage of the alternating current power supply Vin does not meet the standard, the frequency of the detection signal is adjusted, and at the moment, the back end controller U1 determines that the alternating current power supply Vin does not meet the use requirement according to the frequency of the detection signal, and can control to stop working, so that the situation that normal working is impossible or even damage occurs in an environment which does not meet the standard is avoided.
Example two
In some alternative embodiments, the rectifying and voltage dividing circuit 100 includes a first diode D1, a first resistor R1, a second resistor R2, and a third resistor R3;
the anode of the first diode D1 is connected with one end of the output of the alternating current power supply Vin, and the cathode of the first diode D1 is connected with one end of the first resistor R1;
the other end of the first resistor R1 is connected with one end of the second resistor R2 and one end of the third resistor R3;
the other end of the third resistor R3 is connected with the frequency sampling circuit 200 and the voltage detection circuit 300;
the other end of the second resistor R2 is connected with the two output ends of the alternating current power supply Vin and grounded.
In implementation, the output end and the output two ends of the ac power source Vin respectively represent two ends of the ac power source Vin, and for convenience of understanding, as shown in fig. 2, the output end of the ac power source Vin is denoted as "+", and the output two ends of the ac power source Vin are denoted as "-".
The voltage output by the alternating current power supply Vin passes through a first diode D1, the first diode D1 is a rectifier diode, and the voltage is divided by a first resistor R1 and a second resistor R2 and then connected to the frequency sampling circuit 200 and the voltage detection circuit 300.
Optionally, the frequency sampling circuit 200 includes a first comparator U2, a fourth resistor R4, and a fifth resistor R5;
the non-inverting input end of the first comparator U2 is connected with the rectifying voltage-dividing circuit 100, the inverting input end of the first comparator U2 is connected with one end of the fourth resistor R4, and the output end of the first comparator U2 is connected with one end of the fifth resistor R5;
the other end of the fifth resistor R5 is connected with the back-end controller U1;
the other end of the fourth resistor R4 is grounded.
In implementation, the non-inverting input end of the first comparator U2 is connected to the other end of the third resistor R3, the first resistor R1 and the second resistor R2 are divided and then connected to the non-inverting input end of the first comparator U2 through the third resistor R3, and then compared with the reference voltage V1, a square wave (detection signal) is output at the output end of the first comparator U2, and the frequency of the square wave is the same as the ac frequency of the ac power source Vin.
Optionally, the voltage detection circuit 300 includes a second comparator U3, a sixth resistor R6, a seventh resistor R7, and a second diode D2;
the reverse input end of the second comparator U3 is connected with the rectifying voltage-dividing circuit 100, the non-inverting input end of the second comparator U3 is connected with one end of the sixth resistor R6 and one end of the seventh resistor R7, and the output end of the second comparator U3 is connected with the cathode of the second diode D2;
the other end of the sixth resistor R6 is connected with one end of the fourth resistor R4;
the other end of the seventh resistor R7 is connected with the first voltage end;
the anode of the second diode D2 is connected to the other end of the fifth resistor R5.
In operation, the inverting input of the second comparator U3 is connected to the other end of the third resistor R3, and the first voltage terminal can be regarded as the reference voltage V1. The voltage of the alternating current power supply Vin is divided by the first diode D1 and the first resistor R1 and the second resistor R2, then connected to the reverse input end of the second comparator U3, and then compared with the reference voltage V1.
When the input voltage at the inverting input terminal of the second comparator U3 is lower than the set value, which is determined by the reference voltage V1, the second comparator U3 outputs a high level, as shown in fig. 3, and the square wave frequency outputted by the first comparator U2 is unchanged.
When the input voltage at the inverting input terminal of the second comparator U3 is higher than the set value, the second comparator U3 outputs a low level, so that the output level of the first comparator U2 is pulled down by the second diode D2, as shown in fig. 4, each square wave is recessed after being pulled down, and thus the sampling frequency is doubled. When the back-end controller U1 recognizes that the frequency does not meet the power consumption condition of the product, the subsequent circuit is not controlled to work.
Example III
In some embodiments, the present application further provides a circuit board comprising:
a PCB substrate; and
the alternating current detection circuit structure is arranged on the PCB substrate.
In practice, the PCB (Printed Circuit Board ) substrate is a support for the electronic components and is a carrier for the electronic components to be electrically interconnected. The arrangement of the alternating current detection circuit structure on the PCB substrate can be regarded as etching a circuit on the PCB substrate and welding corresponding components, so that the PCB substrate can detect whether the voltage and/or the frequency of the alternating current power supply Vin meet the standard or not, and the situation that the circuit board and the components cannot work normally even are damaged due to the use in an environment which does not meet the standard is avoided.
Optionally, a control chip is disposed on the PCB substrate, and the control chip is a back-end controller U1 connected to the output end of the frequency sampling circuit.
In the implementation, the control chip may be a single chip or other chips, which is not limited herein. Optionally, the control chip is configured to control a working state of the circuit board, when the circuit board is connected to the ac power source Vin, the rectifying and voltage dividing circuit 100 on the circuit board converts and divides an electrical signal of the ac power source Vin to obtain a sampling signal, then the frequency sampling circuit 200 outputs a detection signal with a frequency identical to that of the sampling signal to the back-end controller U1, and meanwhile, the voltage detecting circuit 300 outputs an adjustment signal corresponding to the sampling signal to the frequency sampling circuit 200 to adjust or maintain the frequency of the detection signal. When the voltage of the alternating current power supply Vin meets the standard, the frequency of the detection signal is unchanged, and at the moment, the back-end controller U1 determines that the connected alternating current power supply Vin meets the use requirement according to the frequency of the detection signal, so that the device can work normally. When the frequency of the alternating current power supply Vin does not meet the standard, the back end controller U1 determines that the alternating current power supply Vin does not meet the use requirement according to the frequency, or when the voltage of the alternating current power supply Vin does not meet the standard, the frequency of the detection signal is adjusted, and at the moment, the back end controller U1 determines that the alternating current power supply Vin does not meet the use requirement according to the frequency of the detection signal, and can control to stop working, so that the situation that normal working is impossible or even damage occurs in an environment which does not meet the standard is avoided.
It will be clear to those skilled in the art that, for convenience and indirection, the structure and implementation principle of the circuit board described above may refer to the corresponding structure and implementation principle in the first to second embodiments, and are not described herein again.
Example IV
In some alternative embodiments, the present application also provides a charger comprising a circuit board as described above.
It will be clear to those skilled in the art that, for convenience and indirection of the description, the structure and implementation principle of the charger described above may refer to the corresponding structure and implementation principle in the first to third embodiments, and are not repeated herein.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. An ac power detection circuit structure, comprising:
the rectification voltage division circuit is connected with the alternating current power supply and used for converting and dividing the electric signal of the alternating current power supply to obtain a sampling signal and outputting the sampling signal;
the frequency sampling circuit is connected with the rectification voltage division circuit, receives the sampling signal and outputs a detection signal with the same frequency as the sampling signal to the rear-end controller;
the voltage detection circuit is connected with the rectification voltage division circuit and the frequency sampling circuit, receives the sampling signal and outputs an adjusting signal corresponding to the sampling signal to the frequency sampling circuit so as to adjust or maintain the frequency of the detection signal.
2. The ac power detecting circuit structure according to claim 1, wherein the voltage detecting circuit is configured to output the adjustment signal of a first preset level to the frequency sampling circuit to maintain the frequency of the detection signal when the sampling signal meets a preset standard.
3. The ac power detecting circuit structure according to claim 1, wherein the voltage detecting circuit is configured to output the adjusting signal of a second preset level to the frequency sampling circuit to adjust the frequency of the detecting signal when the sampling signal does not meet a preset standard.
4. An ac power detection circuit arrangement as claimed in claim 2 or claim 3, wherein the predetermined criteria are voltage and frequency criteria of a power grid in which the predetermined region is located.
5. The ac power detection circuit structure according to claim 1, wherein the rectifying and voltage dividing circuit includes a first diode, a first resistor, a second resistor, and a third resistor;
the anode of the first diode is connected with one end of the output of the alternating current power supply, and the cathode of the first diode is connected with one end of the first resistor;
the other end of the first resistor is connected with one end of the second resistor and one end of the third resistor;
the other end of the third resistor is connected with the frequency sampling circuit and the voltage detection circuit;
the other end of the second resistor is connected with the two output ends of the alternating current power supply and grounded.
6. The ac power detection circuit structure of claim 1, wherein said frequency sampling circuit comprises a first comparator, a fourth resistor, and a fifth resistor;
the non-inverting input end of the first comparator is connected with the rectifying voltage dividing circuit, the inverting input end of the first comparator is connected with one end of the fourth resistor, and the output end of the first comparator is connected with one end of the fifth resistor;
the other end of the fifth resistor is connected with the rear end controller;
the other end of the fourth resistor is grounded.
7. The ac power detection circuit structure of claim 6, wherein said voltage detection circuit comprises a second comparator, a sixth resistor, a seventh resistor, and a second diode;
the inverting input end of the second comparator is connected with the rectifying voltage dividing circuit, the non-inverting input end of the second comparator is connected with one end of the sixth resistor and one end of the seventh resistor, and the output end of the second comparator is connected with the cathode of the second diode;
the other end of the sixth resistor is connected with one end of the fourth resistor;
the other end of the seventh resistor is connected with the first voltage end;
and the anode of the second diode is connected with the other end of the fifth resistor.
8. A circuit board, comprising:
a PCB substrate; and
the ac power detection circuit structure according to any one of claims 1 to 7 provided on the PCB substrate.
9. The circuit board of claim 8, wherein a control chip is disposed on the PCB substrate, the control chip being a back-end controller connected to an output of the frequency sampling circuit.
10. A charger comprising a circuit board as claimed in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620354.0U CN219496514U (en) | 2023-03-24 | 2023-03-24 | Alternating current detection circuit structure, circuit board and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620354.0U CN219496514U (en) | 2023-03-24 | 2023-03-24 | Alternating current detection circuit structure, circuit board and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219496514U true CN219496514U (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320620354.0U Active CN219496514U (en) | 2023-03-24 | 2023-03-24 | Alternating current detection circuit structure, circuit board and charger |
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| Country | Link |
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| CN (1) | CN219496514U (en) |
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- 2023-03-24 CN CN202320620354.0U patent/CN219496514U/en active Active
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