CN218276117U - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN218276117U CN218276117U CN202221806261.9U CN202221806261U CN218276117U CN 218276117 U CN218276117 U CN 218276117U CN 202221806261 U CN202221806261 U CN 202221806261U CN 218276117 U CN218276117 U CN 218276117U
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- power supply
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Abstract
The utility model provides a power supply circuit includes voltage input module, first resistance, second resistance, third resistance and first zener diode. The first resistor is a current-limiting resistor and provides a current path for the first voltage-stabilizing diode, the second resistor and the third resistor are divider resistors, the voltage between the anode pin and the cathode pin is limited to 0.6V, and the output port outputs 12V voltage outwards, so that when the power supply circuit is directly connected to the mobile power supply, the household electronic equipment adopting standard 12V power supply voltage can be powered, when the mains supply fails, the household electronic equipment can use the mobile power supply to continue working, inconvenience in use of a user is avoided, and use convenience is improved.
Description
Technical Field
The utility model belongs to the technical field of the mains operated, concretely relates to supply circuit.
Background
At present, the power of the mobile power supply in the market is gradually increasing, and the output current range is also increasingly wider, for example, from the early 5V1A to the current 5V/3A, 9V/3A, 15V/3A, 20V/3A, etc., however, the household electronic devices such as routers, switches, optical modems, monitoring cameras, etc., all adopt the standard 12V power supply voltage, cannot use the mobile power supply to supply power, need to use an independent power adapter and need to be directly connected to the commercial power, and when the commercial power is cut off, the household electronic devices cannot use the mobile power supply to continue working, causing inconvenience for users.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an improve power supply circuit of convenience in use.
In order to achieve the above-mentioned main objective, the utility model provides a power supply circuit includes voltage input module, first resistance, second resistance, third resistance and first zener diode, the first end electricity of power supply circuit first resistance is connected in power supply circuit's delivery outlet, the second end electricity of power supply circuit first resistance is connected in power supply circuit first zener diode's negative pole, the first end of power supply circuit second resistance and the first end of power supply circuit third resistance are connected in parallel in power supply circuit voltage input module's first positive pole pin, second positive pole pin, first negative pole pin and second negative pole pin; the second end of the second resistor of the power supply circuit is electrically connected to the second end of the first resistor of the power supply circuit, and the second end of the third resistor of the power supply circuit is electrically connected to the anode of the first voltage stabilizing diode of the power supply circuit.
According to the scheme, the first resistor is a current-limiting resistor and provides a current path for the first voltage-stabilizing diode, the second resistor and the third resistor are divider resistors, the voltage between the anode pin and the cathode pin is limited to 0.6V, and the output port outputs 12V voltage outwards, so that when the power supply circuit is directly connected to the mobile power supply, the household electronic equipment adopting standard 12V power supply voltage can be supplied with power, when the mains supply is powered off, the household electronic equipment can use the mobile power supply to continue working, inconvenience in use of a user is avoided, and convenience in use is improved.
Preferably, the VBUS pin of the voltage input module is electrically connected to a first end of the first resistor of the power supply circuit.
Preferably, the ground pin of the voltage input module is electrically connected to the second end of the third resistor of the power supply circuit.
Preferably, the resistance value of the first resistor is larger than the resistance value of the second resistor of the power supply circuit.
Furthermore, the resistance value of the second resistor is larger than that of the third resistor of the power supply circuit.
Furthermore, the resistance value of the first resistor is 10K Ω, the resistance value of the second resistor of the power supply circuit is 7.5K Ω, and the resistance value of the third resistor of the power supply circuit is 1K Ω.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for those skilled in the art, other drawings may be obtained without inventive effort from the following drawings.
Fig. 1 is a circuit diagram of an embodiment of the power supply circuit of the present invention.
Fig. 2 is a schematic diagram of a system for operating an embodiment of the power supply circuit according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the power supply circuit 100 provided in this embodiment includes a voltage input module, a first resistor R1, a second resistor R2, a third resistor R3, and a first zener diode VD1, the voltage input module includes a TYPE-C interface, a first end of the first resistor R1 of the power supply circuit is electrically connected to an output port of the power supply circuit, a second end of the first resistor R1 of the power supply circuit is electrically connected to a negative electrode of the first zener diode VD1 of the power supply circuit, a first end of the second resistor R2 of the power supply circuit and a first end of the third resistor R3 of the power supply circuit are connected in parallel to a first positive pin A6, a second positive pin B6, a first negative pin A7, and a second negative pin B7 of the voltage input module of the power supply circuit.
The second end of the second resistor R2 of the power supply circuit is electrically connected to the second end of the first resistor R1 of the power supply circuit, and the second end of the third resistor R3 of the power supply circuit is electrically connected to the anode of the first zener diode VD1 of the power supply circuit.
The VBUS pin of the voltage input module is electrically connected to the first end of the first resistor R1 of the power supply circuit, and comprises a VBUS pin A4, a VBUS pin A9, a VBUS pin B4 and a VBUS pin B9.
The ground pin of the voltage input module is electrically connected to the second end of the third resistor R3 of the power supply circuit, and the ground pin of the voltage input module comprises a GND pin A1, a GND pin A12, a GND pin B1 and a GND pin B12.
The resistance value of the first resistor R1 is larger than that of the second resistor R2 of the power supply circuit, and the resistance value of the second resistor R2 is larger than that of the third resistor R3 of the power supply circuit. Preferably, the resistance value of the first resistor R1 is 10K Ω, the resistance value of the second resistor R2 of the power supply circuit is 7.5K Ω, and the resistance value of the third resistor R3 of the power supply circuit is 1K Ω.
Referring to fig. 1 and 2, the voltage input module is directly connected to a mobile power supply, the first resistor R1 is a current-limiting resistor and provides a current path for the first voltage-stabilizing diode VD1, the second resistor R2 and the third resistor R3 are voltage-dividing resistors and limit the voltage between the positive pin and the negative pin to 0.6V (12V is output when D + D-equals to 0.6V in the QC protocol), so that the output port VOUT outputs 12V voltage externally, and when the power supply circuit is directly connected to the mobile power supply, the power supply circuit can supply power to the household electronic device using the standard 12V power supply voltage.
In addition, since the mobile phone charger is from 5V1A in the early stage to 5V/3A, 9V/3A, 15V/3A, 20V/3A in the present stage, the household electronic device cannot be connected to the mobile phone charger to obtain electricity, therefore, the voltage input module of the power supply circuit is directly connected to the mobile phone charger, and the output port can also output 12V voltage externally, therefore, the power supply circuit 100 can make the household electronic device obtain electricity through the mobile phone charger, and a user does not need to additionally purchase 12V power adapters which are adapted to the household electronic device one by one, so that the types and the number of the power adapters required in actual use are reduced, and the requirements of green and environmental protection can be further met while the use convenience is further improved.
The mobile power supply and the mobile phone charger both support the QC protocol, and the power supply circuit 100 is suitable for the QC protocol.
The power supply circuit 100 may be located in a housing of a power supply connector (not shown in the drawings), and specifically, each electronic component of the power supply circuit 100 may be integrated on a circuit board, and the circuit board may be located in the housing of the power supply connector through a known connection structure such as a screw connection, a snap connection, and the like.
Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only to the preferred embodiments of the invention, and the invention is not limited to the above-described embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A power supply circuit is characterized by comprising a voltage input module, a first resistor, a second resistor, a third resistor and a first voltage stabilizing diode,
the first end of the first resistor is electrically connected with the output port of the power supply circuit, the second end of the first resistor is electrically connected with the cathode of the first voltage stabilizing diode,
the first end of the second resistor and the first end of the third resistor are connected in parallel with a first positive pin, a second positive pin, a first negative pin and a second negative pin of the voltage input module;
the second end of the second resistor is electrically connected to the second end of the first resistor, and the second end of the third resistor is electrically connected to the anode of the first zener diode.
2. A power supply circuit as claimed in claim 1, characterized in that:
and a VBUS pin of the voltage input module is electrically connected to the first end of the first resistor.
3. A power supply circuit as claimed in claim 1, characterized in that:
and the grounding pin of the voltage input module is electrically connected to the second end of the third resistor.
4. A power supply circuit as claimed in claim 1, characterized in that:
the resistance value of the first resistor is larger than that of the second resistor.
5. A power supply circuit according to claim 4, characterized in that:
the resistance value of the second resistor is larger than that of the third resistor.
6. A power supply circuit according to any one of claims 1 to 5, characterized in that:
the resistance value of the first resistor is 10K omega, the resistance value of the second resistor is 7.5K omega, and the resistance value of the third resistor is 1K omega.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221806261.9U CN218276117U (en) | 2022-07-13 | 2022-07-13 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221806261.9U CN218276117U (en) | 2022-07-13 | 2022-07-13 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218276117U true CN218276117U (en) | 2023-01-10 |
Family
ID=84760406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221806261.9U Active CN218276117U (en) | 2022-07-13 | 2022-07-13 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218276117U (en) |
-
2022
- 2022-07-13 CN CN202221806261.9U patent/CN218276117U/en active Active
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