CN217240593U - DC-DC conversion circuit - Google Patents
DC-DC conversion circuit Download PDFInfo
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- CN217240593U CN217240593U CN202123441409.1U CN202123441409U CN217240593U CN 217240593 U CN217240593 U CN 217240593U CN 202123441409 U CN202123441409 U CN 202123441409U CN 217240593 U CN217240593 U CN 217240593U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a circuit field discloses a DC-DC converting circuit, include: the power supply circuit is used for receiving voltage to be converted; the DC-DC circuit comprises a voltage input end and a voltage output end, the voltage input end is connected with the power supply circuit to receive the voltage to be converted, and the voltage output end outputs converted voltage with polarity opposite to that of the voltage to be converted; and the voltage stabilizing output circuit is connected with the voltage output end, stabilizes and outputs the converted voltage. Compared with the prior art, the embodiment of the utility model provides a DC-DC converting circuit has the advantage that can convert the polarity of direct current voltage.
Description
Technical Field
The utility model relates to a circuit field, in particular to DC-DC converting circuit.
Background
The DC (Direct Current) -DC conversion circuit can convert an input DC voltage into an output DC voltage having a higher or lower voltage value.
However, the inventors of the present invention have found that the DC-DC conversion circuit in the prior art can only realize the conversion of the magnitude of the voltage, but cannot realize the conversion of the polarity of the voltage.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a DC-DC converter circuit capable of converting the polarity of a DC voltage.
In order to solve the above technical problem, an embodiment of the present invention provides a DC-DC conversion circuit, including: the power supply circuit is used for receiving a voltage to be converted; the DC-DC circuit comprises a voltage input end and a voltage output end, the voltage input end is connected with the power supply circuit to receive the voltage to be converted, and the voltage output end outputs converted voltage with polarity opposite to that of the voltage to be converted; and the voltage stabilizing output circuit is connected with the voltage output end, stabilizes and outputs the converted voltage.
The utility model discloses embodiment sets up supply circuit and receives and treat conversion voltage for prior art, then will treat conversion voltage input DC-DC circuit, and DC-DC circuit can treat conversion voltage conversion to the reverse voltage output of predetermined magnitude of voltage after receiving to treat conversion voltage to the realization is to the conversion of DC voltage's polarity.
In addition, the DC-DC circuit includes a DC-DC conversion chip, a bootstrap capacitor, and a first inductor, the DC-DC conversion chip includes a voltage input pin, an enable pin, a ground pin, a self-lifting pressure pin, a switch control pin, and a voltage feedback pin, the bootstrap capacitor is connected between the self-lifting pressure pin and the switch control pin, and the switch control pin is grounded via the first inductor; the voltage feedback pin is connected to the voltage output terminal.
In addition, a voltage division circuit is arranged between the voltage output end and the ground, and the voltage feedback pin is connected with the voltage output end through the voltage division circuit.
In addition, the voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, and the first voltage dividing resistor and the second voltage dividing resistor are connected between the voltage input and feedback end and the ground in series.
In addition, the voltage feedback pin is connected between the first voltage-dividing resistor and the second voltage-dividing resistor.
In addition, the output circuit further includes a filter capacitor disposed between the ground and the voltage output terminal.
In addition, the filter capacitors are multiple, and the multiple filter capacitors are connected between the ground and the voltage output end in parallel.
In addition, the power supply circuit includes: the first inductor is used for being connected with the power supply voltage at one end; and the first node is connected with the other end of the first inductor and is connected with the voltage input pin and the enabling pin.
In addition, a first capacitor is arranged between the grounding pin and the first node.
In addition, the number of the first capacitors is multiple, the first capacitors are connected in parallel, and the capacitance values of the first capacitors are different.
Drawings
Fig. 1 is a schematic circuit diagram of a DC-DC converter circuit according to a first embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The first embodiment of the present invention relates to a DC-DC converter circuit, which has a specific structure as shown in fig. 1, including: power supply circuit 10, power supply circuit 10 includes input terminal A for connecting with power supply 100, and power supply circuit 10 is in the time of power supply 100 connection receiving the voltage that waits to convert of power supply 100 output. The DC-DC converter circuit further comprises a DC-DC circuit 20 connected to the supply circuit 10, the DC-DC circuit 20 comprising a voltage input 21 and a voltage output 22, the voltage input 21 being connected to the supply circuit 10. The DC-DC conversion circuit further includes a voltage stabilization output circuit 30 connected to the DC-DC circuit, the voltage stabilization output circuit 30 is connected to the voltage output terminal 22, the voltage stabilization output circuit 30 is configured to receive the voltage with the converted polarity and magnitude output by the voltage output terminal 22 and stabilize the converted voltage, and the voltage stabilization output circuit 30 includes an output terminal B for connection to a load.
Compared with the prior art, the power supply circuit 10 is arranged to receive the voltage to be converted, then the voltage to be converted is input into the DC-DC circuit 20, and after the DC-DC circuit 20 receives the voltage to be converted, the voltage to be converted can be converted into the reverse voltage with the preset voltage value to be output, so that the polarity of the direct-current voltage is converted.
The power supply 100 may be any dc power supply, such as a battery, a dc generator, etc., or may be a converter connected to an ac power grid, where the converter converts ac power of the ac power grid into dc power for output, and the configuration may be flexibly set according to actual needs.
Specifically, in the present embodiment, the DC-DC circuit 20 includes a DC-DC conversion chip 23, and the DC-DC conversion chip 23 includes a voltage input pin (Vin), an enable pin (EN), a ground pin (GND), a self-up pin (BOOT), a switch control pin (SW), and a voltage feedback pin (FB). The DC-DC circuit further comprises a bootstrap capacitor 24, and the bootstrap capacitor 24 is connected between the self-lifting presser foot BOOT and the switch control foot SW. The bootstrap capacitor 24 is arranged to be connected between the self-lifting presser foot BOOT and the switch control foot SW, and can effectively stabilize output voltage. The DC-DC circuit further comprises a first inductor 25, and the switch control pin SW is grounded via the first inductor 25, i.e. one end of the first inductor 25 is connected to the switch control pin SW, and the other end is grounded. Furthermore, a voltage feedback pin (FB) is connected to the voltage output terminal 22 of the DC-DC circuit.
Compared with the prior art, in the present embodiment, the voltage feedback pin (FB) in the DC-DC conversion chip is connected to the voltage output end 22 of the DC-DC circuit, and the voltage output end 22 receives the voltage of the voltage feedback pin (FB), that is, the converted voltage is output through the voltage feedback pin (FB) in the DC-DC conversion chip in the present embodiment, compared with the voltage converted through the self-rising pin (BOOT) in the prior art, the polarity of the output voltage can be converted through the voltage feedback pin (FB) in the DC-DC conversion chip in the present embodiment.
Specifically, in the present embodiment, the DC-DC circuit is further provided with a voltage dividing circuit 26 between the voltage output terminal 22 and the ground, and the voltage feedback pin FB is connected to the voltage output terminal 22 via the voltage dividing circuit 26. The voltage divider circuit 26 includes a first voltage dividing resistor 261 and a second voltage dividing resistor 262, and the first voltage dividing resistor 261 and the second voltage dividing resistor 262 are connected in series between the voltage output terminal 22 and ground. A voltage dividing circuit 26 is disposed between the voltage output end 22 and the ground, and can perform voltage dividing transmission on the voltage input from the voltage feedback pin FB to the voltage output end 22, so as to avoid load damage caused by excessive pressure fluctuation after conversion.
Further, in the present embodiment, the voltage feedback pin FB is connected between the first voltage-dividing resistor 261 and the second voltage-dividing resistor 262.
Further, a voltage dividing capacitor 263 connected in parallel with the first voltage dividing resistor 261 is further included.
In one embodiment of the present invention, as shown in fig. 1, the voltage regulator output circuit 30 includes a filter capacitor 31 disposed between the ground and the voltage output terminal 22. A filter capacitor is disposed between the ground and the voltage output end 22, so that the converted voltage output by the voltage feedback pin FB can be filtered, the damage to the load caused by the fluctuation of the converted voltage is avoided, and the stability of the DC-DC conversion circuit is improved.
Specifically, in the present embodiment, the number of the filter capacitors 31 is plural, and the plurality of filter capacitors 31 are connected in parallel between the voltage output terminal 22 and the ground. It should be understood that the number of the filter capacitors 31 is a plurality of examples, which is only one specific example in this embodiment, and is not limited thereto, and in other embodiments of the present invention, only one filter capacitor 31 may be provided, and the filter capacitors may be flexibly set according to actual needs.
In the present embodiment, the capacitance values of the filter capacitors 31 are different from each other. The capacitance values of the plurality of filter capacitors 31 are different from each other, so that the converted voltage can be better filtered, and the filtering effect is improved. It is understood that the capacitance values of the plurality of filtering capacitors 31 are different only by way of specific examples in this embodiment, and are not limited thereto, and in other embodiments of the present invention, the capacitance values of the plurality of filtering capacitors 31 may be all the same or partially the same, and may be flexibly set according to actual needs.
In an embodiment of the present invention, as shown in fig. 1, the power supply circuit 10 includes a first inductor 11, and one end of the first inductor 11 is used for connecting to a power supply; and a first node 12 connected to the other end of the first inductor 11, the first node 12 being connected to the voltage input pin Vin and the enable pin En. The first node 12 is connected to the voltage input pin Vin and the enable pin En, and when the voltage to be converted is input to the DC-DC chip through the voltage input pin Vin, the enable pin En is continuously at a high potential, so that the DC-DC chip is ensured to continuously convert the band-to-band conversion voltage.
Further, a first capacitance 40 is provided between the ground pin GND and the first node 12. In the present embodiment, the number of the first capacitors 40 is plural, and the plural first capacitors are connected in parallel with each other. It should be understood that the number of the first capacitors 40 is merely a specific example in this embodiment, and is not limited thereto, and in other embodiments of the present invention, the number of the first capacitors 40 may be another structure, such as a single first capacitor, and may be flexibly set according to actual needs.
Specifically, in the present embodiment, the capacitance values of the first capacitors 40 are different from each other. It should be understood that the capacitance values of the plurality of first capacitors 40 are different only by way of specific example in this embodiment, and are not limited thereto, and in other embodiments of the present invention, the capacitance values of the plurality of first capacitors 40 may be all the same or partially the same, and may be flexibly set according to actual needs.
Those skilled in the art can understand that all or part of the steps in the method according to the above embodiments may be implemented by a program to instruct related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (10)
1. A DC-DC conversion circuit, comprising:
the power supply circuit is used for receiving voltage to be converted;
the DC-DC circuit comprises a voltage input end and a voltage output end, the voltage input end is connected with the power supply circuit to receive the voltage to be converted, and the voltage output end outputs converted voltage with polarity opposite to that of the voltage to be converted;
and the voltage stabilizing output circuit is connected with the voltage output end, stabilizes and outputs the converted voltage.
2. The DC-DC conversion circuit of claim 1, wherein the DC-DC conversion circuit comprises a DC-DC conversion chip, a bootstrap capacitor, a first inductor;
the DC-DC conversion chip comprises a voltage input pin, an enable pin, a grounding pin, a self-lifting pressure pin, a switch control pin and a voltage feedback pin,
the bootstrap capacitor is connected between the self-lifting pressure pin and the switch control pin, and the switch control pin is grounded through the first inductor;
the voltage feedback pin is connected to the voltage output end.
3. The DC-DC converter circuit according to claim 2, wherein a voltage dividing circuit is provided between the voltage output terminal and ground, and the voltage feedback pin is connected to the voltage output terminal via the voltage dividing circuit.
4. The DC-DC conversion circuit of claim 3, wherein the voltage divider circuit comprises a first voltage divider resistor and a second voltage divider resistor, the first voltage divider resistor and the second voltage divider resistor being connected in series between the voltage output terminal and the ground.
5. The DC-DC conversion circuit of claim 4, wherein the voltage feedback pin is connected between the first voltage-dividing resistor and the second voltage-dividing resistor.
6. The DC-DC conversion circuit of claim 3, wherein the output circuit further comprises a filter capacitor disposed between the ground and the voltage output terminal.
7. The DC-DC conversion circuit according to claim 6, wherein the filter capacitor is provided in plurality, and the plurality of filter capacitors are connected in parallel between the ground and the voltage output terminal.
8. The DC-DC conversion circuit according to claim 2, wherein the power supply circuit comprises:
the first inductor is used for being connected with a power supply voltage at one end;
and the first node is connected with the other end of the first inductor and is connected with the voltage input pin and the enabling pin.
9. The DC-DC conversion circuit of claim 8,
a first capacitor is arranged between the grounding pin and the first node.
10. The DC-DC conversion circuit according to claim 9, wherein the first capacitors are plural in number, the plural first capacitors are connected in parallel with each other, and capacitance values of the respective first capacitors are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441409.1U CN217240593U (en) | 2021-12-31 | 2021-12-31 | DC-DC conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441409.1U CN217240593U (en) | 2021-12-31 | 2021-12-31 | DC-DC conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217240593U true CN217240593U (en) | 2022-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123441409.1U Active CN217240593U (en) | 2021-12-31 | 2021-12-31 | DC-DC conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217240593U (en) |
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2021
- 2021-12-31 CN CN202123441409.1U patent/CN217240593U/en active Active
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