CN217693060U - Power supply system and electronic equipment - Google Patents
Power supply system and electronic equipment Download PDFInfo
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- CN217693060U CN217693060U CN202221575583.7U CN202221575583U CN217693060U CN 217693060 U CN217693060 U CN 217693060U CN 202221575583 U CN202221575583 U CN 202221575583U CN 217693060 U CN217693060 U CN 217693060U
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Abstract
The application provides a power supply system and relevant electronic equipment, includes: the power management circuit comprises a power chip and two resistors connected in series, wherein the output end of the power chip is connected with one end of each resistor connected in series, and the other end of each resistor connected in series is grounded; the control circuit is connected with the output end of the power supply chip and is connected between the two resistors connected in series; the control circuit receives the output voltage from the output end, converts the output voltage into an electric control signal, generates and outputs an analog control signal to a position between two resistors connected in series and a power supply chip according to the electric control signal so as to regulate the output voltage. The high-precision voltage regulator is high in regulation precision and can regulate output voltage remotely.
Description
Technical Field
The disclosed embodiments of the present application relate to the field of power supply technologies, and more particularly, to a power supply system and an electronic device.
Background
Power systems are an essential part of almost all industrial, medical and consumer markets, with DC-DC power being the most widely used and used. In order to adjust the output voltage of the power supply, the resistance is adjusted, usually by re-welding or by using an adjustable resistor. But causes problems of high cost, inconvenience in operation, large volume of products, and the like.
Disclosure of Invention
According to an embodiment of the present application, a power supply system and an electronic device are provided to solve the above problems.
According to an aspect of the present application, an exemplary power supply system is disclosed, comprising: the power management circuit comprises a power chip and two resistors connected in series, the output end of the power chip is connected with one end of each of the two resistors connected in series, and the other end of each of the two resistors connected in series is grounded; the control circuit is connected with the power supply chip, and is connected between the two resistors connected in series and the output end of the power supply management circuit; the control circuit receives the output voltage from the output end of the power management circuit, converts the output voltage into an electric control signal, generates and outputs an analog control signal to the position between two resistors connected in series and the power chip according to the electric control signal so as to regulate the output voltage.
In an embodiment of the application, the control circuit includes a wireless sub-circuit, and the wireless sub-circuit transmits the regulated output voltage to the external device and/or receives a control command transmitted by the external device from the external device, so that the control circuit receives the output voltage from the output terminal.
In one embodiment of the present application, the control circuit includes an analog-to-digital converter and a digital-to-analog converter, the analog-to-digital converter receives the output voltage from the output terminal and converts the output voltage into an electric control signal, and the digital-to-analog converter generates and outputs an analog control signal to between two resistors connected in series and to the power supply chip according to the electric control signal.
In one embodiment of the present application, the analog control signal is a PWM signal.
In an embodiment of the present application, the power management circuit further includes a filter sub-circuit, and the control circuit is connected to the power chip through the filter sub-circuit.
In an embodiment of the present application, the filter sub-circuit includes an inductor, a first capacitor, and a second capacitor, where the first capacitor is connected in parallel with the second capacitor, one end of the first capacitor and one end of the second capacitor connected in parallel are connected to the inductor, and the other end is grounded.
In an embodiment of the present application, the capacitance values of the first capacitor and the second capacitor are the same.
In an embodiment of the present application, the power management circuit further includes a diode, one end of the diode is connected to the output terminal of the power chip, and the other end of the diode is grounded.
In an embodiment of the present application, the two resistors have different resistance values.
According to another aspect of the present application, there is also provided an electronic device including the power supply system described above.
The beneficial effect of this application: different from the prior art, the control circuit comprises a digital-to-analog converter and an analog-to-digital converter, and the control circuit is connected with the output end of the power management circuit to receive an output voltage signal and then outputs a specific PWM signal to a sampling point between two resistors in the power management circuit and a power chip according to the voltage signal so as to adjust the output voltage; the control circuit also comprises a wireless sub-circuit which sends the output voltage of the power management circuit to the external equipment and then receives the command of the external equipment, and the control circuit can adjust the output voltage according to the command of the external equipment. The output voltage is regulated by outputting a specific PWM signal, so that the regulation precision and convenience degree of the output voltage are improved, and the voltage regulation process is simpler and more convenient; through the interaction of the wireless sub-circuit and the external equipment, the output voltage can be remotely adjusted by a user, and the user can observe the output voltage on the external equipment, so that the output voltage can be adjusted as required according to the current output voltage.
Drawings
The present application will be further described with reference to the accompanying drawings and embodiments, in which:
fig. 1 is a schematic structural diagram of an embodiment of a power supply system according to the present application.
Fig. 2 is a circuit diagram of an embodiment of a power system according to the present application.
Fig. 3 is a circuit diagram of an embodiment of a power system according to the present application.
FIG. 4 is a diagram of an embodiment of an electronic device of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present application, the following detailed description is made with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the present application, a power supply system 100 according to the present embodiment includes a control circuit 120 and a power supply management circuit 110, the power supply management circuit 110 includes a power supply chip 111 and two resistors R1 and R2 connected in series, an output end 111a of the power supply chip 111 is connected to one end of the two resistors R1 and R2 connected in series, and the other end of the two resistors R1 and R2 connected in series is grounded. The control circuit 120 is connected to the power chip 111, and is connected to the output terminal of the power management circuit 110 and between the two resistors R1 and R2 connected in series. The control circuit 120 receives the output voltage from the output terminal of the power management circuit 110, converts the output voltage into an electric control signal, and generates and outputs an analog control signal to the power chip 111 and between the two resistors R1 and R2 connected in series according to the electric control signal, thereby adjusting the output voltage.
The control circuit 120 may be an MCU or the like. The power chip 111 may be a DC-DC power supply, for example, the TPS54561DPRR, or an AC-DC power supply, which is not limited herein.
The control circuit 120 is connected between the two resistors R1 and R2 connected in series, so that the connection point between the two resistors R1 and R2 connected in series can be referred to as a voltage sampling point. The control circuit 120 receives the output voltage from the output end 111a of the power chip 111, converts the output voltage into an electric control signal, generates and outputs an analog control signal to the voltage sampling point and the power chip 111 according to the electric control signal, then the voltage at the voltage sampling point changes, and the output voltage at the output end of the power chip 111 can be calculated according to the resistance values of the two resistors connected in series, so that the purpose of adjusting the output voltage is achieved.
In this embodiment, the output end 111a of the power chip 111 is connected to one end of the two resistors R1 and R2 connected in series, the control circuit 120 is connected to the output end 111a of the power chip 111 and connected to the two resistors R1 and R2 connected in series, so that the control circuit 120 receives the output voltage as a feedback, and outputs an analog control signal to the two resistors R1 and R2 connected in series and the power chip 111 according to the feedback to adjust the output voltage output by the power chip 111, thereby adjusting the output voltage conveniently and in real time, and improving the precision of voltage adjustment.
In some embodiments, referring to fig. 2, which is a schematic structural diagram of a power supply system according to an embodiment of the present disclosure, on the basis of the above embodiments, the control circuit 120 further includes a wireless sub-circuit 121, where the wireless sub-circuit 121 sends the regulated output voltage to an external device, and receives a control instruction sent by the external device, so that the control circuit 120 receives the output voltage from the output end 111 a.
After the control circuit 120 sends the output voltage to the external device, the user can obtain the current value of the output voltage on the external device, and adjust the output voltage according to the actual requirement, and after the wireless sub-circuit 121 of the control circuit 120 receives the control command sent by the external device, the data processing is performed, and the control circuit controls to output a specific analog control signal to adjust the output voltage.
The wireless subcircuit 121 may be a circuit that supports wireless communication functions such as bluetooth and/or WIFI. The external device comprises a mobile phone, a tablet and other devices with voice and/or display functions and capable of receiving and sending external instructions. Through the communication between the wireless sub-circuit 121 and the external device, a user can remotely control the output voltage, the convenience of voltage regulation is improved, and the user can obtain the current output voltage value on the external device.
In some embodiments, referring to fig. 2, the control circuit 120 further includes an analog-to-digital converter 122 and a digital-to-analog converter 123, the analog-to-digital converter 122 receives the output voltage from the output end 111a of the power chip 111 and converts the output voltage into an electric control signal, and the digital-to-analog converter 123 generates and outputs an analog control signal to the two resistors R1 and R2 connected in series and to the power chip 111 according to the electric control signal to regulate the output voltage.
The control circuit 120 receives an output voltage from the output end 111a of the power chip 111, converts the output voltage into an electrical control signal through an analog-to-digital converter 122 built in the control circuit 120, and generates an analog control signal according to the electrical control signal by using a digital-to-analog converter 123 and outputs the analog control signal to a position between two resistors R1 and R2 connected in series, i.e., a voltage sampling point, and the power chip 111, for example, at a certain pin of the power chip 111, outputs a corresponding voltage after the power chip 111 receives the analog control signal output by the control circuit 120, thereby realizing adjustment of the output voltage at the output end 111 a.
In some embodiments, the analog control signal may be a PWM signal.
The accuracy of the output voltage of the power management circuit 110 is improved by the high-accuracy PWM signal output by the control circuit 120. The duty ratio of the PWM signal is adjustable, and the voltage of the analog control signal output by the control circuit 120 is adjusted by adjusting the duty ratio of the PWM signal.
Referring to fig. 3, fig. 3 is a circuit schematic diagram of a power supply system according to an embodiment of the present application, the power management circuit 110 further includes a filtering sub-circuit 112, and the output end 111a of the power chip 111 is connected to the control circuit 120 through the filtering sub-circuit 112.
Further, referring to fig. 3, the filter sub-circuit 112 includes an inductor L, a first capacitor C1 and a second capacitor C2, wherein the first capacitor C1 is connected in parallel with the second capacitor C2, one end of the first capacitor C1 and one end of the second capacitor C2 connected in parallel are connected to the inductor L, and the other end is grounded.
The power supply chip 111 outputs a voltage from its output terminal 111a, passes through the filter sub-circuit 112, and then outputs a voltage from the output terminal of the power management circuit 110.
Further, in some embodiments, the capacitance values of the first capacitor C1 and the second capacitor C2 are the same.
In some embodiments, referring to fig. 3, the power management circuit 110 further includes a diode D, one end of the diode D is connected to the output end 111a of the power chip 111, and the other end is grounded.
The diode D may be formed by connecting a plurality of diodes in parallel, and anodes of the plurality of diodes connected in parallel are commonly grounded, and a cathode of the plurality of diodes is connected to the output terminal of the power chip 111.
As mentioned above, one end of the two resistors R1 and R2 connected in series is connected to the output end 111a of the power chip 111, and in some embodiments, the two resistors R1 and R2 connected in series have different resistance values, for example, the resistance value of the resistor R1 may be 60.4K ohms, and the resistance value of the resistor R2 may be 11.5K ohms.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device 40 according to an embodiment of the present application. The electronic device includes a power supply system 100.
The electronic device 40 may be a mobile terminal such as a mobile phone and a tablet, or a fixed terminal such as a computer. The power supply system may be the power supply system 100 of the above embodiment.
It will be apparent to those skilled in the art that many modifications and variations can be made in the devices and methods while maintaining the teachings of the present application. Accordingly, the above disclosure should be considered limited only by the scope of the following claims.
Claims (10)
1. A power supply system, comprising:
the power management circuit comprises a power chip and two resistors connected in series, wherein the output end of the power chip is connected with one end of the two resistors connected in series, and the other end of the two resistors connected in series is grounded;
the control circuit is connected with the power supply chip, and is connected between the two resistors connected in series and the output end of the power supply management circuit;
the control circuit receives an output voltage from an output end of the power management circuit, converts the output voltage into an electric control signal, and generates and outputs an analog control signal to a position between the two resistors connected in series and the power chip according to the electric control signal so as to regulate the output voltage.
2. The power supply system according to claim 1, wherein the control circuit comprises a wireless sub-circuit, and the wireless sub-circuit transmits the regulated output voltage to an external device and/or receives a control command transmitted by the external device from the external device, so that the control circuit receives the output voltage from the output terminal.
3. The power supply system of claim 2, wherein the control circuit comprises an analog-to-digital converter and a digital-to-analog converter, the analog-to-digital converter receiving an output voltage from the output terminal and converting the output voltage into an electrical control signal, the digital-to-analog converter generating and outputting an analog control signal between the two resistors in series and onto the power supply chip according to the electrical control signal.
4. The power supply system of claim 3, wherein the analog control signal is a PWM signal.
5. The power supply system according to any one of claims 1 to 4, wherein the power management circuit further comprises a filter sub-circuit, and the output terminal of the power supply chip is connected to the control circuit through the filter sub-circuit.
6. The power supply system according to claim 5, wherein the filter sub-circuit comprises an inductor, a first capacitor and a second capacitor, wherein the first capacitor and the second capacitor are connected in parallel, one end of the first capacitor and one end of the second capacitor connected in parallel are connected to the inductor, and the other end of the first capacitor and the other end of the second capacitor are connected to ground.
7. The power supply system of claim 6, wherein the first capacitor has the same capacitance as the second capacitor.
8. The power supply system according to any one of claims 1 to 4, wherein the power management circuit further includes a diode, one end of the diode is connected to the output terminal of the power supply chip, and the other end of the diode is grounded.
9. The power supply system according to any one of claims 1 to 4, wherein the two resistors have different resistance values.
10. An electronic device characterized by comprising a power supply system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575583.7U CN217693060U (en) | 2022-06-21 | 2022-06-21 | Power supply system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575583.7U CN217693060U (en) | 2022-06-21 | 2022-06-21 | Power supply system and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217693060U true CN217693060U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221575583.7U Active CN217693060U (en) | 2022-06-21 | 2022-06-21 | Power supply system and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217693060U (en) |
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2022
- 2022-06-21 CN CN202221575583.7U patent/CN217693060U/en active Active
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