CN214281234U - Self-adaptive power supply circuit - Google Patents
Self-adaptive power supply circuit Download PDFInfo
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- CN214281234U CN214281234U CN202120342061.1U CN202120342061U CN214281234U CN 214281234 U CN214281234 U CN 214281234U CN 202120342061 U CN202120342061 U CN 202120342061U CN 214281234 U CN214281234 U CN 214281234U
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- voltage conversion
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- power supply
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Abstract
The utility model discloses a self-adaptation power supply circuit, including main power supply, stand-by power supply, 12V voltage conversion circuit, 5V voltage conversion circuit, 3.3V voltage conversion circuit, first triode switch circuit, second triode switch circuit, control chip, main power supply, stand-by power supply all connect 12V voltage conversion circuit's input, 12V voltage conversion circuit's output termination 5V voltage conversion circuit's input, 5V voltage conversion circuit's output termination 3.3V voltage conversion circuit's output, first triode switch circuit is connected with 12V voltage conversion circuit's output, second triode switch circuit's output and 5V voltage conversion circuit's output, control chip is connected with first triode switch circuit, second triode switch circuit's control end. The utility model discloses a circuit structure is simple, and is with low costs, can be nimble close a certain voltage conversion circuit to practice thrift the electric energy.
Description
Technical Field
The utility model relates to a power supply circuit technical field specifically is a self-adaptation power supply circuit.
Background
The structure of the current power supply circuit is complex, the cost is high, and a certain output voltage can not be flexibly closed, when the output voltage values of the power supply circuit are more, the traditional power supply circuit adopts various voltage conversion chips to output different voltage values, so that when only a certain voltage value is needed, other unnecessary voltage conversion chips can work simultaneously, the waste of electric energy is caused, and unnecessary interference is generated in the circuit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a self-adaptation power supply circuit, circuit structure is simple, and is with low costs, can be nimble close a certain voltage conversion circuit to practice thrift the electric energy.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a self-adaptation power supply circuit, includes main power supply, stand-by power supply, 12V voltage conversion circuit, 5V voltage conversion circuit, 3.3V voltage conversion circuit, first triode switch circuit, second triode switch circuit, control chip, main power supply, stand-by power supply all connect 12V voltage conversion circuit's input, 12V voltage conversion circuit's output termination 5V voltage conversion circuit's input, 5V voltage conversion circuit's output termination 3.3V voltage conversion circuit's output, first triode switch circuit is connected with 12V voltage conversion circuit's output, second triode switch circuit's output and 5V voltage conversion circuit's output, control chip is connected with first triode switch circuit, second triode switch circuit's control end.
Preferably, the main power supply and the standby power supply are connected with the input end of the 12V voltage conversion circuit through a single-pole double-throw switch.
Preferably, the first triode switching circuit comprises a first triode, a second triode, a first resistor, a second resistor and a first sliding rheostat, wherein a collector of the first triode is connected with an output end of the 12V voltage conversion circuit, an emitter of the first triode is connected with an input end of the 5V voltage conversion circuit, a base of the first triode is connected with an emitter of the second triode, a base of the second triode is connected with one end of the first sliding rheostat, a collector of the second triode is connected with one end of the first resistor, the other end of the first resistor and the other end of the first sliding rheostat are both grounded, and a sliding end of the first sliding rheostat is connected with one end of the second resistor.
Preferably, the other end of the second resistor is connected with the control chip.
Preferably, the first triode switch circuit and the second triode switch circuit have the same circuit structure.
Preferably, the 12V voltage conversion circuit outputs 12V, the 5V voltage conversion circuit outputs 5V, and the 3.3V voltage conversion circuit outputs 3.3V.
Preferably, the 12V voltage conversion circuit is a 7812 model voltage conversion chip.
Preferably, the 5V voltage conversion circuit adopts a 7805 model voltage conversion chip.
Preferably, the 3.3V voltage conversion circuit adopts a voltage conversion chip of LM1117-3.3 model.
Preferably, the voltage stabilizing circuit comprises a first voltage stabilizer and a second voltage stabilizer, one end of the first voltage stabilizer is connected with the input end of the 5V voltage conversion circuit, the other end of the first voltage stabilizer is grounded, one end of the second voltage stabilizer is connected with the input end of the 3.3V voltage conversion circuit, and the other end of the second voltage stabilizer is grounded.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a through setting up 2 triode switch circuit and coming the break-make that controls 5V voltage conversion circuit, 3.3V voltage conversion circuit respectively, can make the unnecessary circuit out of work to reduce the energy consumption, practice thrift the cost.
2. The utility model discloses a switch main power supply, stand-by power supply in a flexible way, main power supply, stand-by power supply pass through single-pole double-throw switch and are connected with 12V voltage conversion circuit's input.
3. The utility model discloses a triode controls opening of 5V voltage conversion circuit and 3.3V voltage conversion circuit with the design that the slide rheostat combines, and its circuit structure is simple, and is with low costs, can use widely on a large scale, and the use is also very nimble.
4. The utility model discloses still include voltage stabilizing circuit, set up the stabiliser in the many places position of circuit, can improve the stability of circuit greatly, output stable voltage.
5. The utility model discloses a self-adaptation power supply circuit can be as required nimble regulation output voltage, guarantees the power supply demand of circuit, reduces unnecessary circuit interference.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a schematic circuit diagram of the control chip of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1-3, the utility model provides a self-adaptation power supply circuit, including the main power supply, stand-by power supply, 12V voltage conversion circuit, 5V voltage conversion circuit, 3.3V voltage conversion circuit, first triode switch circuit, second triode switch circuit, control chip, the main power supply, stand-by power supply all connects 12V voltage conversion circuit's input, 12V voltage conversion circuit's output termination 5V voltage conversion circuit's input, 5V voltage conversion circuit's output termination 3.3V voltage conversion circuit's output, first triode switch circuit is connected with 12V voltage conversion circuit's output, second triode switch circuit's output and 5V voltage conversion circuit's output, control chip and first triode switch circuit, second triode switch circuit's control end is connected.
The working principle is that the voltage output by the main power supply or the standby power supply is converted into 12V output through a 12V voltage conversion circuit, then is converted into 5V output through a 5V voltage conversion circuit, and finally is converted into 3.3V output through a 3.3V voltage conversion circuit, if 3.3V is not required to be output, the main control chip controls a second triode switch circuit, a path from the 5V voltage conversion circuit to the 3.3V voltage conversion circuit is disconnected, and the 3.3V voltage conversion circuit does not work; if the output of 5V is not needed, the main control chip controls the first triode switching circuit to disconnect the path from the 12V voltage conversion circuit to the 5V voltage conversion circuit, and the 5V voltage conversion circuit does not work; if 5V is required to be output, the main control chip controls the second triode switch circuit to open a path from the 5V voltage conversion circuit to the 3.3V voltage conversion circuit; by the design, unnecessary circuits can not work, so that energy consumption is reduced, and cost is saved.
The utility model discloses a switch main power supply, stand-by power supply in a flexible way, main power supply, stand-by power supply pass through single-pole double-throw switch and are connected with 12V voltage conversion circuit's input.
The utility model discloses a further embodiment, first triode switch circuit includes first triode Q1, second triode Q2, first resistance R1, second resistance R2, first slide rheostat RP1, the collecting electrode of first triode Q1 connects 12V voltage conversion circuit's output, the projecting pole of first triode Q1 connects 5V voltage conversion circuit's input, the base of first triode Q1 connects the projecting pole of second triode Q2, the base of second triode Q2 connects the one end of first slide rheostat RP1, the collecting electrode of second triode Q2 connects the one end of first resistance R1, the other end of first resistance R1 and the other end of first slide rheostat RP1 all ground connection, the one end of the slide termination second resistance R2 of first slide rheostat RP 1. The other end of the second resistor R2 is connected to the control chip 4. The first triode switch circuit and the second triode switch circuit have the same circuit structure.
If the output of 5V is not needed, the main control chip outputs a certain voltage signal to the first slide rheostat RP1 through the second resistor R2, so that the first triode Q1 is cut off, and a path from the 12V voltage conversion circuit to the 5V voltage conversion circuit is cut off; when 5V is required to be output, the main control chip outputs a certain voltage signal to the first sliding rheostat RP1 through the second resistor R2, so that the first triode Q1 is turned on, and a path from the 12V voltage conversion circuit to the 5V voltage conversion circuit is opened.
The utility model discloses an in another embodiment, 12V voltage conversion circuit output 12V, 5V voltage conversion circuit output 5V, 3.3V voltage conversion circuit output 3.3V. The 12V voltage conversion circuit adopts a 7812 model voltage conversion chip. The 5V voltage conversion circuit adopts a 7805 model voltage conversion chip. The 3.3V voltage conversion circuit adopts a voltage conversion chip of LM1117-3.3 model.
The utility model discloses an improve the stability of circuit, still include voltage stabilizing circuit, voltage stabilizing circuit comprises first stabiliser D4, second stabiliser D5, and a termination 5V voltage conversion circuit's of first stabiliser D4 input, first stabiliser D4's other end ground connection, second stabiliser D5's a termination 3.3V voltage conversion circuit's input, second stabiliser D5's other end ground connection.
In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
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 invention. 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, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An adaptive power supply circuit comprising a main power supply, characterized in that: still include stand-by power supply, 12V voltage conversion circuit, 5V voltage conversion circuit, 3.3V voltage conversion circuit, first triode switch circuit, second triode switch circuit, control chip, main power supply, stand-by power supply all connect 12V voltage conversion circuit's input, 12V voltage conversion circuit's output termination 5V voltage conversion circuit's input, 5V voltage conversion circuit's output termination 3.3V voltage conversion circuit's output, first triode switch circuit is connected with 12V voltage conversion circuit's output, second triode switch circuit's output and 5V voltage conversion circuit's output, control chip is connected with first triode switch circuit, second triode switch circuit's control end.
2. The adaptive power supply circuit according to claim 1, wherein: the main power supply and the standby power supply are connected with the input end of the 12V voltage conversion circuit through the single-pole double-throw switch.
3. The adaptive power supply circuit according to claim 1, wherein: the first triode switching circuit comprises a first triode, a second triode, a first resistor, a second resistor and a first sliding rheostat, wherein a collector of the first triode is connected with the output end of the 12V voltage conversion circuit, an emitter of the first triode is connected with the input end of the 5V voltage conversion circuit, a base of the first triode is connected with an emitter of the second triode, a base of the second triode is connected with one end of the first sliding rheostat, a collector of the second triode is connected with one end of the first resistor, the other end of the first resistor and the other end of the first sliding rheostat are both grounded, and a sliding end of the first sliding rheostat is connected with one end of the second resistor.
4. The adaptive power supply circuit according to claim 3, wherein: the other end of the second resistor is connected with the control chip.
5. The adaptive power supply circuit according to claim 1 or 2, characterized in that: the first triode switch circuit and the second triode switch circuit have the same circuit structure.
6. The adaptive power supply circuit according to claim 1, wherein: the 12V voltage conversion circuit outputs 12V, the 5V voltage conversion circuit outputs 5V, and the 3.3V voltage conversion circuit outputs 3.3V.
7. The adaptive power supply circuit according to claim 1, wherein: the 12V voltage conversion circuit adopts a 7812 type voltage conversion chip.
8. The adaptive power supply circuit according to claim 1, wherein: the 5V voltage conversion circuit adopts a 7805 model voltage conversion chip.
9. The adaptive power supply circuit according to claim 1, wherein: the 3.3V voltage conversion circuit adopts a voltage conversion chip of LM1117-3.3 model.
10. The adaptive power supply circuit according to claim 1, wherein: the voltage stabilizing circuit is composed of a first voltage stabilizer and a second voltage stabilizer, one end of the first voltage stabilizer is connected with the input end of the 5V voltage conversion circuit, the other end of the first voltage stabilizer is grounded, one end of the second voltage stabilizer is connected with the input end of the 3.3V voltage conversion circuit, and the other end of the second voltage stabilizer is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120342061.1U CN214281234U (en) | 2021-02-05 | 2021-02-05 | Self-adaptive power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120342061.1U CN214281234U (en) | 2021-02-05 | 2021-02-05 | Self-adaptive power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214281234U true CN214281234U (en) | 2021-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120342061.1U Active CN214281234U (en) | 2021-02-05 | 2021-02-05 | Self-adaptive power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214281234U (en) |
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2021
- 2021-02-05 CN CN202120342061.1U patent/CN214281234U/en active Active
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