CN219875511U - Power supply circuit and electronic device - Google Patents
Power supply circuit and electronic device Download PDFInfo
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- CN219875511U CN219875511U CN202320405832.6U CN202320405832U CN219875511U CN 219875511 U CN219875511 U CN 219875511U CN 202320405832 U CN202320405832 U CN 202320405832U CN 219875511 U CN219875511 U CN 219875511U
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Abstract
The present utility model relates to a power supply circuit and an electronic device, the power supply circuit comprising: a power conversion unit for converting output power of the input power according to the configuration signal; the power supply system comprises at least two optional units, wherein each optional unit is connected with the power supply conversion unit, and the output end of each optional unit is used for being connected with a module to be powered; the control unit is connected with each matching unit and is used for outputting control instructions; each matching unit is used for controlling the on-off of the corresponding module to be powered and the power conversion unit according to the control instruction, and outputting the configuration signal when the corresponding module to be powered is conducted with the power conversion unit. The utility model realizes that a plurality of modules to be powered with different working power supply requirements can share the same power supply control module, reduces the number of the power supply control modules, lowers the production cost of products, is beneficial to reducing the wiring area of the PCB and is beneficial to miniaturization of electronic equipment.
Description
Technical Field
The present utility model relates to the field of driving power technologies, and in particular, to a power circuit and an electronic device.
Background
Currently, in order to meet the use demands of consumers, the functions of electronic devices are becoming more powerful, so some electronic devices are configured with various functional modules, and the operating power requirements of the functional modules are different. Taking an interphone as an example, the power supply requirements required by the flash lamp circuit and the backlight lamp circuit are different, such as different working currents or working voltages, so that the circuits are required to be powered by the corresponding power supply control modules, which results in increased production cost and more space needs to be reserved for designing the PCB circuit.
Disclosure of Invention
In order to solve the problems, the utility model provides a power supply circuit and electronic equipment, which can meet the power supply requirements of different functional modules, reduce the production cost and simplify the design of a PCB circuit.
The technical scheme adopted for solving the technical problems is as follows: a power supply circuit and an electronic device are constructed, including:
a power conversion unit for converting output power of the input power according to the configuration signal;
the power supply system comprises at least two optional units, wherein each optional unit is connected with the power supply conversion unit, and the output end of each optional unit is used for being connected with a module to be powered;
the control unit is connected with each matching unit and is used for outputting control instructions;
each matching unit is used for controlling the on-off of the corresponding module to be powered and the power conversion unit according to the control instruction, and outputting the configuration signal when the corresponding module to be powered is conducted with the power conversion unit.
Preferably, each of the matching units includes a first control switch, a second control switch, and an output setting unit;
the control end of the first control switch is connected with the control unit, the input end of the first control switch is connected with the output end of the power conversion unit, and the output end of the first control switch is used for being connected with the input end of the corresponding module to be powered;
the control end of the second control switch is connected with the control unit, the input end of the second control switch is connected with the output setting unit and the corresponding output end of the module to be powered, and the output end of the second control switch is connected with the feedback end of the power conversion unit.
Preferably, the output setting unit includes a sampling resistor; the input end of the sampling resistor is connected with the input end of the second control switch, and the output end of the sampling resistor is grounded.
Preferably, the power conversion unit comprises a voltage converter, an energy storage unit, a rectifying unit and a filtering unit;
the power supply pin of the voltage converter is connected with the input end of the energy storage unit and the input power supply, the switch output pin of the voltage converter is connected with the output end of the energy storage unit and the input end of the rectifying unit, the output end of the rectifying unit is connected with each matching unit through the filtering unit, and the feedback pin of the voltage converter is connected with each matching unit.
Preferably, the power conversion unit further includes a first capacitor and a second capacitor;
the power supply pin of the voltage converter is connected to the ground through the first capacitor, and the compensation pin of the voltage converter is connected to the ground through the second capacitor.
Preferably, the filtering unit includes a third capacitor and a fourth capacitor; the output end of the rectifying unit is connected with the first end of the third capacitor and the first end of the fourth capacitor, the first end of the third capacitor and the first end of the fourth capacitor are also connected with each matching unit, and the second end of the third capacitor and the second end of the fourth capacitor are grounded.
Preferably, the energy storage unit comprises an inductance; the first end of the inductor is used as the input end of the energy storage unit to be connected with the power supply pin of the voltage converter, and the second end of the inductor is used as the output end of the energy storage unit to be connected with the switch output pin of the voltage converter.
Preferably, the rectifying unit includes a diode; the anode of the diode is used as the input end of the rectifying unit to be connected with the switch output pin of the voltage converter, and the cathode of the diode is used as the output end of the rectifying unit to be connected with the filtering unit.
The utility model also constructs an electronic device comprising the power supply circuit provided by the embodiment of the utility model.
Preferably, the number of the optional units is 2, and the modules to be powered corresponding to the 2 optional units are respectively a backlight source and a flash lamp of the electronic device.
The utility model has the following beneficial effects: providing a power supply circuit; the control unit outputs a control instruction to control each selection unit to work, so as to control the corresponding module to be powered on or off with the power conversion unit, and the corresponding selection unit adaptively sets the output power of the power conversion unit by outputting a configuration signal to control the power conversion unit to convert an input power into a working power which accords with the module to be powered and connected with the selection unit; the power supply module to be powered on, which realizes the requirements of a plurality of different working power supplies, can share the same power supply control module, reduces the number of the power supply control modules, reduces the production cost of products, is beneficial to reducing the wiring area of the PCB and is beneficial to miniaturization of electronic equipment.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a power circuit in some embodiments of the utility model;
FIG. 2 is a schematic circuit diagram of a power circuit in some embodiments of the utility model;
fig. 3 is a control logic diagram of a power supply circuit in some embodiments of the utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a power circuit according to some embodiments of the utility model is shown. The power supply circuit can selectively drive different modules to be powered according to requirements. The power supply circuit includes:
a power conversion unit 1 for converting output power of an input power according to a configuration signal;
the power supply system comprises at least two optional units 2, wherein each optional unit 2 is connected with a power supply conversion unit 1, and the output end of each optional unit 2 is used for being connected with a module to be powered;
the control unit 3 is connected with each matching unit 2 and is used for outputting control instructions;
each matching unit 2 is configured to control on-off of a corresponding module to be powered and the power conversion unit 1 according to a control instruction, and output a configuration signal when the corresponding module to be powered is conducted with the power conversion unit 1, so that the power conversion unit 1 can convert an input power into a working power conforming to the module to be powered by using the configuration signal.
In this embodiment, the control unit 3 may output a corresponding control instruction to each optional unit 2 according to a key operation or an input instruction, so as to control the operation of each optional unit 2, so that only one to-be-powered module is turned on with the power conversion unit 1, and the optional unit 2 corresponding to the turned-on to-be-powered module adaptively sets the output power of the power conversion unit 1 (including setting the output voltage or the output current) by outputting a configuration signal, so as to control the power conversion unit 1 to convert the input power into a working power that meets the to-be-powered module connected with the optional unit 2, thereby enabling the to-be-powered module to obtain power, realizing that a plurality of to-be-powered modules with different working power requirements can share the same power control module, reducing the number of power control modules, thereby reducing the product production cost, and being beneficial to reducing the PCB wiring area and facilitating miniaturization of electronic equipment.
In some embodiments, the control unit 3 may be an upper computer or a single chip microcomputer, and is configured to output a control instruction of a high level or a low level to control the switching on or off of the matching unit 2.
In some embodiments, the module to be powered may be a backlight, a flash, or the like.
In some embodiments, as shown in fig. 2, each of the matching units 2 includes a first control switch (21 a,21 b), a second control switch (22 a,22 b), and an output setting unit (23 a,23 b). Specifically, the control ends of the first control switches (21 a,21 b) are connected with the control unit 3, the input ends of the first control switches (21 a,21 b) are connected with the output ends of the power conversion unit 1, and the output ends of the first control switches (21 a,21 b) are used for being connected with the input ends of the corresponding modules to be powered; the control ends of the second control switches (22 a,22 b) are connected with the control unit 3, the input ends of the second control switches (22 a,22 b) are connected with the output setting units (23 a,23 b) and the corresponding output ends of the modules to be powered, and the output ends of the second control switches (22 a,22 b) are connected with the feedback ends of the power conversion unit 1.
In fig. 2, the case where the present embodiment includes two matching units 2 is exemplarily shown, and it should be noted that this is shown only as an example and is not intended to limit the number of matching units 2. In the following, taking fig. 2 as an example, the first control switch 21a, the second control switch 22a, and the output setting unit 23a constitute one of the optional units 2, and the first control switch 21b, the second control switch 22b, and the output setting unit 23b constitute the other optional unit 2. As shown in fig. 2, the control unit 3 includes a plurality of control command output terminals for connecting each of the matching units 2; the first control switches (21 a,21 b) and the second control switches (22 a,22 b) in the same matching unit 2 can be simultaneously connected with the same control instruction output end of the control unit 3, so that IO port resources can be saved; the parameters of the output setting units (23 a,23 b) of different selecting units 2 can be set according to the requirements of the to-be-supplied modules connected with the corresponding selecting units 2, so that when the second control switches (22 a,22 b) are conducted, the output parameters of the power conversion unit 1 are adaptively set, and the power supply parameters output by the power conversion unit 1 are matched with the input power supply parameters of the to-be-supplied modules.
In this embodiment, the control unit 3 controls the control logic of each matching unit 2 according to fig. 2 and 3, and the specific procedure is as follows: when the first control instruction output end I/O-1 of the control unit 3 outputs a low level, the first control switch 21a and the second control switch 22a are closed, and at the moment, the first module to be powered LED-1 connected with the first control switch 21a is powered off and stops working; when the first control instruction output end I/O-1 outputs a high level, the first control switch 21a and the second control switch 22a are conducted, and the output setting unit 23a and the feedback end of the power conversion unit 1 realize a channel so as to control the output power supply parameter of the power conversion unit 1, so that the power conversion unit 1 provides an adaptive working power supply for the first module to be powered LED-1; when the second control instruction output end I/O-2 of the control unit 3 outputs a low level, the first control switch 21b and the second control switch 22b are closed, at the moment, the second module to be powered LED-2 connected with the first control switch 21b is powered off and stops working, when the second control instruction output end I/O-2 outputs a high level, the first control switch 21b and the second control switch 22b are conducted, the output setting unit 23b and the feedback end of the power conversion unit 1 realize a passage to control the output power supply parameter of the power conversion unit 1, so that the power conversion unit 1 provides an adaptive working power supply for the second module to be powered LED-2; in addition, when one of the control command output terminals outputs a high level, the other control command output terminals of the control unit 3 output a low level to ensure that the first control switch and the second control switch in the other optional unit 2 are turned off, so as to avoid the influence of the output power parameters of the power conversion unit 1.
In some embodiments, the first control switch (21 a,21 b) and the second control switch (22 a,22 b) comprise a triode, a MOS transistor, wherein the triode may be an NPN triode, and the MOS transistor may be an NMOS transistor.
In some embodiments, as shown in FIG. 2, the output setting unit (23 a,23 b) includes a sampling resistor. Specifically, the input end of the sampling resistor is connected with the input ends of the second control switches (23 a,23 b), and the output end of the sampling resistor is grounded.
In this embodiment, when the first control switch (21 a,21 b) and the second control switch (22 a,22 b) are turned on, the power source output by the power source conversion unit 1 is connected to the ground through the first control switch (21 a,21 b), the module to be powered and the sampling resistor, so that the module to be powered is electrically operated; the resistance signal (i.e. the configuration signal) generated by the sampling resistor is connected to the feedback end of the power conversion unit 1 through the second control switches (21 a,21 b) to control the output power parameter of the power conversion unit 1.
To facilitate adjusting parameters of the output setting units (23 a,23 b), in some embodiments, the sampling resistor may be composed of a plurality of resistors in series.
In some embodiments, the power conversion unit 1 may be an existing switching power supply module for boosting or stepping down an input power supply.
Further, in a specific embodiment, as shown in fig. 2, the power conversion unit 1 includes a voltage converter U1, an energy storage unit 11, a rectifying unit 12, and a filtering unit 13.
Specifically, the power supply pin VIN of the voltage converter U1 is connected to the input end of the energy storage unit 11 and the input power, the switch output pin SW of the voltage converter U1 is connected to the output end of the energy storage unit 11 and the input end of the rectifying unit 12, the output end of the rectifying unit 12 is connected to each matching unit 2 through the filtering unit 13, and the feedback pin FB of the voltage converter U1 is connected to each matching unit 2. In some embodiments, as shown in fig. 2, the power conversion unit 1 further includes a first capacitor C1 and a second capacitor C2. Specifically, the power supply pin VIN of the voltage converter U1 is connected to the ground via the first capacitor C1, and the compensation pin COMP of the voltage converter U1 is connected to the ground via the second capacitor C2. The first capacitor C1 is a filter capacitor and is used for filtering an input power supply, so that the circuit stability is improved; the second capacitor C2 is a compensation capacitor, so as to perform loop compensation on the internal operational amplifier of the voltage converter U1, thereby improving the circuit stability.
In some embodiments, as shown in fig. 2, the filtering unit 13 includes a third capacitor C3 and a fourth capacitor C4. Specifically, the output end of the rectifying unit 12 is connected to the first end of the third capacitor C3 and the first end of the fourth capacitor C4, the first end of the third capacitor C3 and the first end of the fourth capacitor C4 are also connected to each matching unit 2, and the second end of the third capacitor C3 and the second end of the fourth capacitor C4 are grounded. The third capacitor C3 and the fourth capacitor C4 are used for filtering the voltage waveform of the rectified output power supply, so that the voltage waveform tends to be a smooth curve.
In some embodiments, as shown in fig. 2, the energy storage unit 11 includes an inductance L1. Specifically, a first end of the inductor L1 is connected to the power supply pin VIN of the voltage converter U1 as an input end of the energy storage unit 11, and a second end of the inductor L1 is connected to the switch output pin SW of the voltage converter U1 as an output end of the energy storage unit 11.
In some embodiments, as shown in fig. 2, the rectifying unit 12 includes a diode D1. Specifically, an anode of the diode D1 is connected to the switch output pin SW of the voltage converter U1 as an input terminal of the rectifying unit 12, and a cathode of the diode D1 is connected to the filtering unit 13 as an output terminal of the rectifying unit 12.
The utility model also provides electronic equipment, which comprises the power supply circuit provided by the embodiment.
In some embodiments, the electronic device includes a mobile terminal such as a cell phone, intercom, or the like. When the electronic device is an interphone, the number of the optional units 2 is 2, and the modules to be powered corresponding to the 2 optional units 2 are respectively a backlight source and a flash lamp of the interphone.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A power supply circuit, comprising:
a power conversion unit for converting output power of the input power according to the configuration signal;
the power supply system comprises at least two optional units, wherein each optional unit is connected with the power supply conversion unit, and the output end of each optional unit is used for being connected with a module to be powered;
the control unit is connected with each matching unit and is used for outputting control instructions;
each matching unit is used for controlling the on-off of the corresponding module to be powered and the power conversion unit according to the control instruction, and outputting the configuration signal when the corresponding module to be powered is conducted with the power conversion unit.
2. The power supply circuit according to claim 1, wherein each of the matching units includes a first control switch, a second control switch, and an output setting unit;
the control end of the first control switch is connected with the control unit, the input end of the first control switch is connected with the output end of the power conversion unit, and the output end of the first control switch is used for being connected with the input end of the corresponding module to be powered;
the control end of the second control switch is connected with the control unit, the input end of the second control switch is connected with the output setting unit and the corresponding output end of the module to be powered, and the output end of the second control switch is connected with the feedback end of the power conversion unit.
3. The power supply circuit according to claim 2, wherein the output setting unit includes a sampling resistor; the input end of the sampling resistor is connected with the input end of the second control switch, and the output end of the sampling resistor is grounded.
4. The power supply circuit according to claim 1, wherein the power supply conversion unit includes a voltage converter, an energy storage unit, a rectifying unit, and a filtering unit;
the power supply pin of the voltage converter is connected with the input end of the energy storage unit and the input power supply, the switch output pin of the voltage converter is connected with the output end of the energy storage unit and the input end of the rectifying unit, the output end of the rectifying unit is connected with each matching unit through the filtering unit, and the feedback pin of the voltage converter is connected with each matching unit.
5. The power supply circuit of claim 4, wherein the power conversion unit further comprises a first capacitor and a second capacitor;
the power supply pin of the voltage converter is connected to the ground through the first capacitor, and the compensation pin of the voltage converter is connected to the ground through the second capacitor.
6. The power supply circuit of claim 4, wherein the filter unit comprises a third capacitor and a fourth capacitor; the output end of the rectifying unit is connected with the first end of the third capacitor and the first end of the fourth capacitor, the first end of the third capacitor and the first end of the fourth capacitor are also connected with each matching unit, and the second end of the third capacitor and the second end of the fourth capacitor are grounded.
7. The power supply circuit of claim 4, wherein the energy storage unit comprises an inductor; the first end of the inductor is used as the input end of the energy storage unit to be connected with the power supply pin of the voltage converter, and the second end of the inductor is used as the output end of the energy storage unit to be connected with the switch output pin of the voltage converter.
8. The power supply circuit according to claim 4, wherein the rectifying unit includes a diode; the anode of the diode is used as the input end of the rectifying unit to be connected with the switch output pin of the voltage converter, and the cathode of the diode is used as the output end of the rectifying unit to be connected with the filtering unit.
9. An electronic device comprising a power supply circuit as claimed in any one of claims 1 to 8.
10. The electronic device of claim 9, wherein the number of the optional units is 2, and the modules to be powered corresponding to the 2 optional units are respectively a backlight and a flash of the electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320405832.6U CN219875511U (en) | 2023-02-27 | 2023-02-27 | Power supply circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320405832.6U CN219875511U (en) | 2023-02-27 | 2023-02-27 | Power supply circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875511U true CN219875511U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320405832.6U Active CN219875511U (en) | 2023-02-27 | 2023-02-27 | Power supply circuit and electronic device |
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| Country | Link |
|---|---|
| CN (1) | CN219875511U (en) |
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2023
- 2023-02-27 CN CN202320405832.6U patent/CN219875511U/en active Active
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