CN205195557U - Power switching circuit - Google Patents
Power switching circuit Download PDFInfo
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- CN205195557U CN205195557U CN201520840569.9U CN201520840569U CN205195557U CN 205195557 U CN205195557 U CN 205195557U CN 201520840569 U CN201520840569 U CN 201520840569U CN 205195557 U CN205195557 U CN 205195557U
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- switching circuit
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Abstract
The utility model relates to a power electronics field, especially, relate to a power switching circuit, provide a power switching circuit, include first current potential line through founing one, second current potential line, keep apart power module, buck circuit and low dropout regulator's power switching circuit, respectively in first current potential line input 12V's voltage, voltage in second current potential line input 0V, through keeping apart a power module output first voltage, through a buck circuit output second voltage, through a low dropout regulator output A third voltage, this technical scheme receives first current potential line with voltage between the second current potential line, but this voltage direct output simultaneously, through keeping apart a power module output first voltage, through a buck circuit output second voltage, are established ties through a low dropout regulator and are exported a A third voltage in the buck circuit, have effectively realized the firm output of multivoltage.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly relates to a kind of power-switching circuit.
Background technology
Low-voltage signal modulate circuit can comprise operational amplifier, programmable chip, logical transition device etc. usually; normally can work to make these devices and usually need to provide bipolar power supply (as ± 12V); the working power (as 3.3V) of programmable chip, the conventional working power (as 5V) etc. of other part of devices.The power system design of low-voltage signal modulate circuit directly affects the performance of whole circuit, the mode that traditional low-voltage circuit electric power system adopts single power module to power usually, single power module generally uses a multitap transformer to obtain the voltage of required different brackets, the turn ratio of Transformer Winding is relied on to ensure the accuracy of voltage, usually only have the output voltage of a winding with feedback, other windings rely on transformer turn ratio to ensure accurately.And the mode of this acquisition different brackets voltage relies on the turn ratio of transformer largely, its voltage exported usually and target voltage have relatively large deviation, be unfavorable for the stable operation of low-voltage signal modulate circuit.
Therefore, how to stablize and realize multiple voltage and be output into a great problem that those skilled in the art face.
Utility model content
In view of the above problems, the utility model provides a power-switching circuit, by building the power-switching circuit that comprises the first equipotential line, the second equipotential line, insulating power supply module, Buck circuit and low pressure difference linear voltage regulator, respectively at the voltage of the first equipotential line input 12V, in the voltage of the second equipotential line input 0V, one first voltage is exported by insulating power supply module, one second voltage is exported by Buck circuit, export a tertiary voltage by low pressure difference linear voltage regulator, this technical scheme is specially:
A kind of power-switching circuit, wherein, described power-switching circuit is used for univoltage input multivoltage and exports, and described power-switching circuit comprises:
First equipotential line, the second equipotential line, for described power-switching circuit provides connection access point, and provide voltage source for described power-switching circuit;
Insulating power supply module, comprise first input end, the second input, the 3rd input and the first output, described first input end is connected with described first equipotential line, described second input is connected with described second equipotential line, described 3rd input is connected with described second equipotential line, and described first output exports one first voltage;
Buck circuit, is connected between described first equipotential line and described second equipotential line, exports one second voltage;
Low pressure difference linear voltage regulator, is connected between described Buck circuit and described second equipotential line, is connected, exports a tertiary voltage with described Buck circuit.
Above-mentioned power-switching circuit, wherein, described Buck circuit comprises:
Reduction voltage circuit, is connected with described first equipotential line and described second equipotential line;
First control chip, is connected with described reduction voltage circuit, exports the second voltage.
Above-mentioned power-switching circuit, wherein, described first control chip also comprises:
Voltage acquisition end, is connected with voltage acquisition unit, gathers the voltage of described voltage acquisition unit;
Relatively end, compares the voltage of described voltage acquisition unit with a normal voltage, to guarantee that the voltage of described voltage acquisition unit meets the demands.
Above-mentioned power-switching circuit, wherein, described first control chip is TPS54331D.
Above-mentioned power-switching circuit, wherein, described insulating power supply module comprises one second control chip, receives the voltage between described first equipotential line and the second equipotential line, by controlling output first voltage.
Above-mentioned power-switching circuit, wherein, described second control chip is B1212S/D.
Above-mentioned power-switching circuit, wherein, described low pressure difference linear voltage regulator comprises one the 3rd control chip, being described tertiary voltage by described second voltage transitions.
Above-mentioned power-switching circuit, wherein, described 3rd control chip is AMS1117-3.3.
Above-mentioned power-switching circuit, wherein, the voltage of described first equipotential line is 12V, and the voltage of described second equipotential line is 0V.
Above-mentioned power-switching circuit, wherein, described first voltage is-12V, and described second voltage is 5V, and described tertiary voltage is 3.3V.
Technique scheme tool has the following advantages or beneficial effect:
The technical program, receive the voltage between described first equipotential line and described second equipotential line, this voltage can directly export, simultaneously, one first voltage is exported by insulating power supply module, export one second voltage by a Buck circuit, be series at Buck circuit by a low pressure difference linear voltage regulator and export a tertiary voltage, effectively achieve the stable output of multivoltage.
Accompanying drawing explanation
With reference to appended accompanying drawing, to describe embodiment of the present utility model more fully.But, appended accompanying drawing only for illustration of and elaboration, do not form the restriction to the utility model scope.
Fig. 1 is the structural representation of power-switching circuit in the utility model one embodiment;
Fig. 2 is the circuit diagram of insulating power supply module in another embodiment of the utility model;
Fig. 3 is the circuit diagram of Buck circuit in the utility model one embodiment;
Fig. 4 is the circuit diagram of the utility model one embodiment mesolow difference linear constant voltage regulator.
Embodiment
The utility model provides a power-switching circuit, and this power-switching circuit comprises the first equipotential line, the second equipotential line, insulating power supply module, Buck circuit and low pressure difference linear voltage regulator, wherein:
First equipotential line, the second equipotential line, for described power-switching circuit provides connection access point, and provide voltage source for described power-switching circuit;
Insulating power supply module, comprise first input end 1., the second input 2., the 3rd input 3. with the first output 4., 1. described first input end is connected with described first equipotential line, 2. described second input is connected with described second equipotential line, 3. described 3rd input is connected with described second equipotential line, and 4. described first output exports one first voltage;
Buck circuit U 2, is connected between described first equipotential line and described second equipotential line, exports one second voltage;
Low pressure difference linear voltage regulator, is connected between described Buck circuit and described second equipotential line, is connected, exports a tertiary voltage with described Buck circuit.
Structure shown in Figure 1, as the utility model preferred embodiment, the voltage of the first equipotential line is 12V, and the second equipotential line is GND, i.e. earth connection, voltage is 0V, and the voltage of the 12V of the first equipotential line can directly export by this Power convert structure, simultaneously, by insulating power supply module U0 process, export first voltage of-12V, exporting by Buck circuit the second voltage that size is 5V, is the tertiary voltage of 3.3V size by second photovoltaic conversion of 5V by low pressure difference linear voltage regulator.
Preferably, insulating power supply module comprises one second control chip, receives the voltage between described first equipotential line and the second equipotential line, by controlling output first voltage.
On this basis, further, the second control chip is B1212S/D.
Circuit shown in Figure 2, insulating power supply module comprises the second control chip, voltage between first equipotential line and the second equipotential line is transferred to the second control chip U2 after electric capacity C2 and electric capacity C9 filtering, voltage between first equipotential line and the second equipotential line is after the second control chip, again after an electric capacity C10 and an electric capacity C11 filtering, export, be-12V.
Preferably, Buck circuit comprises:
Reduction voltage circuit, is connected with described first equipotential line and described second equipotential line;
First control chip, is connected with described reduction voltage circuit, exports the second voltage.
On this basis, further, the first control chip also comprises:
Voltage acquisition end, is connected with voltage acquisition unit, gathers the voltage of described voltage acquisition unit;
Relatively end, compares the voltage of described voltage acquisition unit with a normal voltage, to guarantee that the voltage of described voltage acquisition unit meets the demands.
On this basis, further, the first control chip is TPS54331D.
Structure shown in Figure 3, Buck circuit comprises the first control chip U1, first equipotential line and the second equipotential line transfer to the first control chip after a reduction voltage circuit, first through electric capacity C1 and C3 filtering before voltage transmission between first equipotential line and the second equipotential line to reduction voltage circuit, then through the bleeder circuit of resistance R47 and R48 formation, transfer to the VIN end 2 of the first control chip, exported by BOOST end 2, through an electric capacity C4 and an inductance L 2 after output, and then obtain two output voltages after an electric capacity C8 filtering.
Meet the demands in order to ensure the first voltage, Buck circuit also comprises a voltage acquisition unit and a normal voltage, the voltage acquisition end VSENSE of the first control chip holds the voltage of 5 collection voltage acquisition units, the normal voltage of (COMP) 5 is held to compare with comparing, to guarantee that the second output voltage meets user's requirement, be 5V.
Preferably, low pressure difference linear voltage regulator comprises one the 3rd control chip, being described tertiary voltage by described second voltage transitions.
On this basis, further, the 3rd control chip is AMS1117-3.3.
Structure shown in Figure 4, low pressure difference linear voltage regulator comprises the 3rd control chip, and the second voltage obtained through Buck circuit through the 3rd chip U3, is obtaining output three voltage after an electric capacity C12 filtering after an electric capacity C13 filtering.
In sum, the utility model provides a power-switching circuit, the first equipotential line is comprised by building one, second equipotential line, insulating power supply module, the power-switching circuit of Buck circuit and low pressure difference linear voltage regulator, respectively at the voltage of the first equipotential line input 12V, in the voltage of the second equipotential line input 0V, one first voltage is exported by insulating power supply module, one second voltage is exported by Buck circuit, a tertiary voltage is exported by low pressure difference linear voltage regulator, the technical program receives the voltage between described first equipotential line and described second equipotential line, this voltage can directly export, simultaneously, one first voltage is exported by insulating power supply module, one second voltage is exported by a Buck circuit, be series at Buck circuit by a low pressure difference linear voltage regulator and export a tertiary voltage, effectively achieve the stable output of multivoltage.
Should be understood that, the utility model can be implemented in different forms, and should not be interpreted as the embodiment that is confined to propose here.On the contrary, provide these embodiments will expose thoroughly with complete, and scope of the present utility model is fully passed to those skilled in the art.In the accompanying drawings, in order to clear, the size in Ceng He district and relative size may be exaggerated.Same reference numerals represents identical element from start to finish.
Above preferred embodiment of the present utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, the equipment wherein do not described in detail to the greatest extent and structure are construed as to be implemented with the common mode in this area; Any those of ordinary skill in the art, do not departing under technical solutions of the utility model ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or being revised as the Equivalent embodiments of equivalent variations, this does not affect flesh and blood of the present utility model.Therefore, every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.
Claims (10)
1. a power-switching circuit, is characterized in that, described power-switching circuit is used for univoltage input multivoltage and exports, and described power-switching circuit comprises:
First equipotential line, the second equipotential line, for described power-switching circuit provides connection access point, and provide voltage source for described power-switching circuit;
Insulating power supply module, comprise first input end, the second input, the 3rd input and the first output, described first input end is connected with described first equipotential line, described second input is connected with described second equipotential line, described 3rd input is connected with described second equipotential line, and described first output exports one first voltage;
Buck circuit, is connected between described first equipotential line and described second equipotential line, exports one second voltage;
Low pressure difference linear voltage regulator, is connected between described Buck circuit and described second equipotential line, is connected, exports a tertiary voltage with described Buck circuit.
2. power-switching circuit as claimed in claim 1, it is characterized in that, described Buck circuit comprises:
Reduction voltage circuit, is connected with described first equipotential line and described second equipotential line;
First control chip, is connected with described reduction voltage circuit, exports the second voltage.
3. power-switching circuit as claimed in claim 2, it is characterized in that, described first control chip also comprises:
Voltage acquisition end, is connected with voltage acquisition unit, gathers the voltage of described voltage acquisition unit;
Relatively end, compares the voltage of described voltage acquisition unit with a normal voltage, to guarantee that the voltage of described voltage acquisition unit meets the demands.
4. power-switching circuit as claimed in claim 2, it is characterized in that, described first control chip is TPS54331D.
5. power-switching circuit as claimed in claim 1, it is characterized in that, described insulating power supply module comprises one second control chip, receives the voltage between described first equipotential line and the second equipotential line, by controlling output first voltage.
6. power-switching circuit as claimed in claim 5, it is characterized in that, described second control chip is B1212S/D.
7. power-switching circuit as claimed in claim 1, it is characterized in that, described low pressure difference linear voltage regulator comprises one the 3rd control chip, being described tertiary voltage by described second voltage transitions.
8. power-switching circuit as claimed in claim 7, it is characterized in that, described 3rd control chip is AMS1117-3.3.
9. power-switching circuit as claimed in claim 1, it is characterized in that, the voltage of described first equipotential line is 12V, and the voltage of described second equipotential line is 0V.
10. power-switching circuit as claimed in claim 1, it is characterized in that, described first voltage is-12V, and described second voltage is 5V, and described tertiary voltage is 3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520840569.9U CN205195557U (en) | 2015-10-27 | 2015-10-27 | Power switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520840569.9U CN205195557U (en) | 2015-10-27 | 2015-10-27 | Power switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205195557U true CN205195557U (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520840569.9U Active CN205195557U (en) | 2015-10-27 | 2015-10-27 | Power switching circuit |
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| CN (1) | CN205195557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458473A (en) * | 2020-05-26 | 2020-07-28 | 扬州大学 | Method for reducing power consumption of large water area water quality monitoring sensing node |
-
2015
- 2015-10-27 CN CN201520840569.9U patent/CN205195557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458473A (en) * | 2020-05-26 | 2020-07-28 | 扬州大学 | Method for reducing power consumption of large water area water quality monitoring sensing node |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221118 Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Hubei Chasri New Energy Technology Co.,Ltd. Address before: 441104 No. 1, Zhuiri Road, Xiangyang Hi tech Industrial Development Zone, Xiangfan City, Hubei Province Patentee before: HUBEI SURPASS SUN ELECTRIC Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Borg Warner New Energy (Xiangyang) Co.,Ltd. Address before: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee before: Hubei Chasri New Energy Technology Co.,Ltd. |