CN216819698U - Terminal power supply circuit and device - Google Patents
Terminal power supply circuit and device Download PDFInfo
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- CN216819698U CN216819698U CN202123319025.2U CN202123319025U CN216819698U CN 216819698 U CN216819698 U CN 216819698U CN 202123319025 U CN202123319025 U CN 202123319025U CN 216819698 U CN216819698 U CN 216819698U
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Abstract
The utility model relates to the technical field of voltage change, in particular to a terminal power supply circuit and a device, wherein the terminal power supply circuit is provided with a switch module, a stabilizing module, a conversion module and an output control module; the switching module is used for controlling whether the conversion module operates or not, the conversion module can convert voltage into pulse voltage signals with amplitude as high as input voltage and duty ratio as low as 0V and adjustable, the stabilizing module is used for converting the pulse voltage signals converted by the conversion module into stable voltage signals, and the output control module is used for controlling the size of the output stable voltage signals, so that the variation range of the converted voltage is adjusted according to the size of the input voltage, and low voltage and high voltage can be converted.
Description
Technical Field
The utility model relates to the technical field of voltage change, in particular to a terminal power supply circuit and a terminal power supply device.
Background
The electric device has many electronic equipments, the power supply voltage needed by different equipments is different, in order to make each terminal equipment can normally operate, the terminal power supply adjusting device is added. However, the existing terminal power supply adjusting device is divided into a low-voltage version of 9-36V and a high-voltage version of 40-100V, and in the installation process, the situation that the high-voltage version terminal cannot work when installed on a low-voltage vehicle type and the low-voltage version terminal is damaged when installed on a high-voltage vehicle type is easily caused. Therefore, the prior art has the problem that the high-voltage power supply and the low-voltage power supply cannot be compatible.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a terminal power supply circuit and a terminal power supply device to overcome the problem that the current high-low voltage power supply is not compatible.
In order to achieve the purpose, the utility model adopts the following technical scheme:
in one aspect, the utility model provides a terminal power supply circuit, which comprises a switch module, a stabilizing module, a conversion module and an output control module;
the switch module and the output control module are respectively and electrically connected with the conversion module;
the conversion module is respectively electrically connected with the power input end and the output end so as to convert the voltage of the power input by the power input end and input the converted voltage to the terminal equipment through the output end; the switching module is used for controlling the running state of the conversion module, and the output control module is used for controlling the voltage value output by the output end;
the stabilizing module is arranged between the converting module and the output end and used for maintaining the stability of the voltage converted by the converting module;
the switch module is used for controlling whether the conversion module operates or not;
the output control module is used for controlling the output voltage.
Furthermore, the terminal power supply circuit also comprises a current-limiting protection module;
the current-limiting protection module is arranged between the power input end and the conversion module and used for preventing the conversion module from being damaged due to overlarge current of the power input end.
Furthermore, the terminal power supply circuit also comprises a reverse connection protection module;
the reverse connection protection module comprises a first reverse connection protection module and a second reverse connection protection module;
the first reverse connection protection module is arranged between the power input end and the conversion module, and the second reverse connection protection module is arranged between the conversion module and the output end and used for preventing the reverse connection of the power input and the damage to the whole circuit.
Furthermore, the terminal power supply circuit also comprises an input filtering module;
the input filtering module is arranged between the power input end and the conversion module and used for filtering alternating current noise and inhibiting voltage change of the input end.
Furthermore, the terminal power supply circuit also comprises an output filtering module;
the output filtering module is arranged between the conversion module and the output end and used for reducing the pulsation component in the output voltage as much as possible and storing the direct current component in the output voltage as much as possible so that the output voltage is close to the ideal direct current.
Further, in the terminal power supply circuit, the conversion module includes a SY8501 chip.
Further, in the terminal power supply circuit, the stabilizing module includes a capacitor and an inductor, the inductor is disposed between the converting module and the output terminal, one end of the capacitor is grounded, and the other end of the capacitor is connected to a wire between the converting module and the output terminal.
Further, in the terminal power supply circuit, the current limiting protection module includes a fuse.
Further, in the terminal power supply circuit, the reverse connection protection module includes a diode.
In another aspect, the present invention further provides a terminal power supply device, which includes a housing and the terminal power supply circuit described in any one of the above, wherein the terminal power supply circuit is disposed in the housing.
The utility model has the beneficial effects that: the utility model discloses a terminal power supply circuit and a device, wherein the terminal power supply circuit is provided with a switch module, a stabilizing module, a conversion module and an output control module; the switching module is used for controlling whether the conversion module operates or not, the conversion module can convert voltage into pulse voltage signals with amplitude as high as input voltage and duty ratio as low as 0V and adjustable, the stabilizing module is used for converting the pulse voltage signals converted by the conversion module into stable voltage signals, and the output control module is used for controlling the size of the output stable voltage signals, so that the variation range of the converted voltage is adjusted according to the size of the input voltage, and low voltage and high voltage can be converted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of a terminal power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The present invention provides the following embodiments to solve the above problem, which is a problem in the prior art that the high-voltage and low-voltage power supplies are incompatible.
Example (b):
as shown in fig. 1, the present embodiment provides a terminal power supply circuit, which includes a switch module 1, a stabilizing module 8, a converting module 2, and an output control module 3;
specifically, the conversion module 2 comprises a SY8501 chip;
the switch module 1 and the output control module 3 are respectively and electrically connected with the conversion module 2;
the conversion module 2 is respectively electrically connected with the power input end 4 and the output end 5, so that the power of the power input end 4 is converted into voltage and then is input to the terminal equipment;
specifically, the power input end 4 is connected with the IN end of the SY8501 chip through a wire, and the output end 5 is connected with the LX end of the SY8501 chip through a wire;
the stabilizing module 8 is arranged between the converting module 2 and the output end 5 and is used for maintaining the stability of the voltage converted by the converting module;
specifically, the stabilizing module 8 comprises an inductor and a capacitor, the inductor is arranged between the LX end of the SY8501 chip and the output end 5, one end of the capacitor is grounded, and the other end of the capacitor is connected to a wire between the LX end of the SY8501 chip and the output end 5;
the switch module 1 is used for controlling whether the conversion module 2 operates or not;
in some optional embodiments, the switch module 1 includes a resistor, one end of the resistor is electrically connected to the EN end of the SY8501 chip, and the other end of the resistor is connected to a wire between the power input terminal 4 and the conversion module 2;
the output control module 3 is used for controlling the output voltage;
in some optional embodiments, the output control module 3 includes a first resistor and a second resistor, the two resistors are connected in series, one end of the first resistor is connected to the wire between the conversion module 2 and the output terminal 5, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is grounded, and the FB end of the SY8501 chip is connected to the wire between the first resistor and the second resistor;
after the terminal power supply circuit is started, the switch module 1 enables the SY8501 chip to enable the SY8501 chip to start working, IN the output control module 3, the voltage output to the output end 5 after conversion of the SY8501 chip is controlled through the ratio of the resistance values between the two resistors, the SY8501 chip converts the power voltage of the IN end into a pulse voltage signal with adjustable duty ratio which is as high as the input voltage and as low as 0V, the inductor IN the stabilization module 8 enables the converted pulse voltage signal to be a stable voltage signal through the self voltage characteristic, and the size of the output stable voltage signal is controlled according to the ratio of the resistance values between the two resistors IN the output control module 3;
the switching module is used for controlling whether the conversion module operates or not, the conversion module can convert voltage into pulse voltage signals with amplitude as high as input voltage and duty ratio as low as 0V and adjustable, the stabilizing module is used for converting the pulse voltage signals converted by the conversion module into stable voltage signals, and the output control module is used for controlling the size of the output stable voltage signals, so that the variation range of the converted voltage is adjusted according to the size of the input voltage, and low voltage and high voltage can be converted.
In order to protect the terminal power supply circuit from overload operation, the terminal power supply circuit further comprises a current-limiting protection module 6, wherein the current-limiting protection module 6 is arranged between the power input end 4 and the conversion module 2 and is used for preventing the conversion module 2 from being damaged due to overlarge input current of the power input end 4;
in some alternative embodiments, the current limiting protection module 6 includes a fuse, and the fuse will be blown when the current input from the power input terminal 4 is too large, so as to prevent the conversion module 2 from being damaged due to the too large input current.
In order to prevent damage caused by reverse connection in use, the terminal power supply circuit further comprises a reverse connection protection module 7, and the reverse connection protection module 7 comprises a first reverse connection protection module and a second reverse connection protection module;
the first reverse connection protection module is arranged between the power input end 4 and the conversion module 2, and the second reverse connection protection module is arranged between the conversion module 2 and the output end 5 and used for preventing the reverse connection of the power input and the damage to the whole circuit;
in some alternative embodiments, the reverse-connection protection module 7 comprises a diode, the diode can only operate current flowing from the anode to the cathode, and when the terminal power supply circuit is reverse-connected, current cannot flow from the cathode to the anode, thereby preventing the conversion module 2 from being damaged due to reverse-connection of the power input.
In order to ensure that the power input by the power input end 4 is more stable, further, the terminal power supply circuit further comprises an input filtering module 9, wherein the input filtering module 9 is arranged between the power input end 4 and the conversion module 2 and is used for filtering alternating current noise and inhibiting voltage change of the input end;
in some alternative embodiments, the input filter module 9 comprises a first capacitor and a second capacitor, the first capacitor and the second capacitor are connected in parallel, one end of the parallel circuit is grounded, and the other end of the parallel circuit is connected to a wire between the power input terminal 4 and the conversion module 2.
In order to stabilize the output voltage after conversion, the terminal power supply circuit further includes an output filter module 10, where the output filter module 10 is disposed between the conversion module 2 and the output terminal 5, and is used to reduce the ripple component in the output voltage as much as possible, and to preserve the dc component in the output voltage as much as possible, so that the output voltage is close to the ideal dc;
in some alternative embodiments, the output filter module 10 comprises a capacitor, one end of which is connected to ground and the other end of which is connected to a conductor between the conversion module 2 and the output terminal 5.
In order to control the high level time width of the output pulse voltage signal after the conversion of the SY8501, the power supply further comprises a pulse control module, wherein one end of the pulse control module is connected with the RON end of the SY8501, and the other end of the pulse control module is connected to a wire between the power supply input end 4 and the conversion module 2;
in some optional embodiments, the pulse control module includes a resistor, and controls the high-level time width of the converted output pulse voltage signal by controlling the resistance value of the resistor.
Based on one general inventive concept, the present application further provides a terminal power supply device, which includes a housing and the terminal power supply circuit of the above embodiment, the terminal power supply circuit being disposed in the housing.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A terminal power supply circuit is characterized by comprising a switch module, a stabilizing module, a conversion module and an output control module;
the switch module and the output control module are respectively connected with the conversion module;
the conversion module is respectively electrically connected with the power input end and the output end so as to convert the voltage of the power input by the power input end and input the converted voltage to the terminal equipment through the output end; the switching module is used for controlling the running state of the conversion module, and the output control module is used for controlling the voltage value output by the output end;
the stabilizing module is arranged between the converting module and the output end and used for maintaining the stability of the voltage converted by the converting module;
the switch module is used for controlling whether the conversion module operates or not;
the output control module is used for controlling the output voltage.
2. The terminal power supply circuit according to claim 1, further comprising a current limiting protection module;
the current-limiting protection module is arranged between the power input end and the conversion module.
3. The terminal power supply circuit according to claim 1, further comprising a reverse connection protection module;
the reverse connection protection module comprises a first reverse connection protection unit and a second reverse connection protection unit;
the first reverse connection protection module is arranged between the power supply input end and the conversion module, and the second reverse connection protection module is arranged between the conversion module and the output end.
4. The terminal power supply circuit according to claim 1, further comprising an input filter module;
the input filtering module is arranged between the power input end and the conversion module.
5. The terminal power supply circuit according to claim 1, further comprising an output filter module;
the output filtering module is arranged between the conversion module and the output end.
6. The terminal power supply circuit as claimed in claim 1, wherein the conversion module comprises a SY8501 chip.
7. A terminal power supply circuit as claimed in claim 1, wherein said stabilizing module comprises a capacitor and an inductor, said inductor being disposed between said converting module and said output terminal, said capacitor being connected at one end to ground and at the other end to a conductor between said converting module and said output terminal.
8. The terminal power supply circuit of claim 2, wherein the current limiting protection module comprises a fuse.
9. A terminal power supply circuit as claimed in claim 3, wherein the reverse-connection protection module comprises a diode.
10. A terminal power supply device comprising a housing and a terminal power supply circuit according to any one of claims 1 to 9, said terminal power supply circuit being disposed within said housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123319025.2U CN216819698U (en) | 2021-12-27 | 2021-12-27 | Terminal power supply circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123319025.2U CN216819698U (en) | 2021-12-27 | 2021-12-27 | Terminal power supply circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216819698U true CN216819698U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123319025.2U Active CN216819698U (en) | 2021-12-27 | 2021-12-27 | Terminal power supply circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216819698U (en) |
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2021
- 2021-12-27 CN CN202123319025.2U patent/CN216819698U/en active Active
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