CN217087765U - Power supply circuit and DC-DC converter applying same - Google Patents
Power supply circuit and DC-DC converter applying same Download PDFInfo
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- CN217087765U CN217087765U CN202220910913.7U CN202220910913U CN217087765U CN 217087765 U CN217087765 U CN 217087765U CN 202220910913 U CN202220910913 U CN 202220910913U CN 217087765 U CN217087765 U CN 217087765U
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Abstract
The utility model discloses a power supply circuit, including the filtering input circuit, the filtering input circuit is used for restraining conducted interference. The enabling control circuit comprises a power supply module, a first capacitor, a first resistor and a relay; the first capacitor is connected with the filter input circuit in parallel, and the first resistor and the relay are respectively connected with the power supply module; the relay comprises a first terminal port and a second terminal port, the first terminal port is used for connecting a first resistor, and the second terminal port is used for connecting a power supply module. And the output regulating circuit is used for regulating the output voltage. The utility model discloses make DC-DC converter can change the power of circuit through the change of relay enable logic in the course of the work, reduce the power action that is unfavorable for steady operation such as outage by force or temporary stop work to reduce the influence that the change of electric current or voltage caused work efficiency, make the state that can effectively adjust power supply circuit in the operation work, guarantee the job stabilization nature of DC-DC transformer.
Description
Technical Field
The utility model relates to an electronic circuit technical field specifically belongs to a power supply circuit and uses DC-DC converter that has this circuit.
Background
The stability requirement for the operation of the DC-DC converter is also increasing due to the function and usage environment requirements of the DC-DC converter. In the current DC-DC converter power supply circuit, when the power supply voltage of the converter is lower than the normal operating voltage required by the converter, the converter is in an unstable operating state, which easily causes an abnormal phenomenon. However, in the existing converter power supply system, only some rough means similar to forced power-off or temporary work stop and the like exist, and no effective technical means is provided for solving the problem that the converter works abnormally in a low-voltage state, which undoubtedly causes influence on normal and stable operation of the DC-DC converter and cannot better meet the actual demand.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power supply circuit and applied DC-DC converter that has this circuit for DC-DC converter can change the power of circuit through the change of relay messenger's ability logic in the working process predetermineeing the within range, reduces the power behavior that is unfavorable for steady operation such as outage by force or temporary stop work, thereby reduces the influence that the change of electric current or voltage caused work efficiency.
The utility model discloses a following technical scheme realizes:
a power supply circuit comprising:
the filter input circuit is used for suppressing conducted interference;
the enabling control circuit comprises a power supply module, a first capacitor, a first resistor and a relay; the first capacitor is connected with the filter input circuit in parallel, and the first resistor and the relay are respectively connected with the power supply module; the relay comprises a first terminal port and a second terminal port, the first terminal port is used for connecting a first resistor, and the second terminal port is used for connecting a power supply module;
and the output regulating circuit is used for regulating the output voltage.
Furthermore, the filtering input circuit comprises a power supply, a second resistor and a power supply filter, wherein one end of the second resistor is connected with the positive electrode of the power supply, and the other end of the second resistor is connected with the filter.
Furthermore, one end of the first resistor is connected with a first positive voltage pin of the power supply module, and the other end of the first resistor is connected with the first terminal port; the second terminal port is connected with a first negative pressure pin of the power supply module.
Furthermore, the first resistor, the relay and the power supply module form a path through a resistor pin of the power supply module.
Further, the output regulating circuit comprises a third resistor and a fourth resistor, and the third resistor and the fourth resistor are connected in parallel; one end of the third resistor is connected with a second positive voltage pin of the power supply module, and the other end of the third resistor is connected with a voltage regulating pin of the power supply module; one end of the fourth resistor is connected with the second negative voltage pin of the power module, and the other end of the fourth resistor is connected with the voltage regulating pin of the power module.
Further, the output regulating circuit further comprises a first capacitor, a second capacitor, a third capacitor and load equipment, wherein the first capacitor and the second capacitor are respectively connected with the load equipment in parallel.
Furthermore, one end of the first capacitor is connected with the first positive voltage pin, and the other end of the first capacitor is connected with the first negative voltage pin; one end of the second capacitor is connected with the second positive voltage pin, and the other end of the second capacitor is connected with the second negative voltage pin; one end of the third capacitor is connected with the second positive voltage pin, and the other end of the third capacitor is connected with the second negative voltage pin.
Furthermore, the first capacitor, the second capacitor and the third capacitor are electrolytic capacitors.
Furthermore, two ends of the third capacitor are voltage compensation sampling points.
In a second aspect, the present invention further provides a DC-DC converter, which includes a control circuit therein, and further includes the above power circuit.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
compare in prior art's scheme, the utility model provides a scheme carries out the during operation at the converter, after the electric current passes through input filter circuit, can realize distal end control or remote control and enable the circuit through the cooperation of first resistance with the relay. Meanwhile, the third resistor and the fourth resistor are arranged, the output voltage can be adjusted by adjusting the resistance values of the third resistor and the fourth resistor, and the whole circuit is prevented from being in a long-time abnormal working state, so that the state of the power circuit can be effectively adjusted in the operation of the converter, and the working stability of the DC-DC transformer is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic diagram of a power supply circuit provided by the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
With the development of the times and the progress of science and technology, the requirements on the stability of the operation of the DC-DC converter are higher and higher due to the requirements of the function and the use environment of the DC-DC converter. In the current DC-DC converter power supply circuit, when the power supply voltage of the converter is lower than the normal operating voltage required by the converter, the converter is in an unstable operating state, which easily causes an abnormal phenomenon. However, in the existing converter power supply system, only some rough means similar to forced power-off or temporary work stop and the like exist, and no effective technical means is provided for solving the problem that the converter works abnormally in a low-voltage state, which undoubtedly causes influence on normal and stable operation of the DC-DC converter and cannot better meet the actual demand.
The solution idea of this embodiment is that, after passing through the input filter circuit, the relay K1 can be enabled by remote control or remote control through the cooperation of the resistor R0 and the relay K1. Meanwhile, in this embodiment, the output circuit is provided with the resistor R1 and the resistor R2, and the condition of the output voltage can be realized by adjusting the resistances of the resistors R1 and R2, so that the circuit is prevented from being in a long-time abnormal working state, and thus, in the operation of the converter, the state of the power supply circuit can be effectively adjusted, and the working stability of the DC-DC transformer is ensured.
Referring to fig. 1, the embodiment provides an overcurrent protection circuit, which includes a filter input circuit for suppressing conducted interference. The enabling control circuit comprises a power supply module, a capacitor Cin, a resistor R0 and a relay K1; the capacitor Cin is connected with the filter input circuit in parallel, and the resistor R0 and the relay K1 are respectively connected with the power supply module; the relay K1 comprises a terminal port and a terminal port, wherein the terminal port is used for connecting the resistor R0, and the terminal port is used for connecting a power supply module. And the output regulating circuit is used for regulating the output voltage. In this way, the resistance of the circuit can be adjusted by the enable control of the relay K1, and the stable operation of the power supply circuit is realized.
The filtering input circuit comprises a power supply, a resistor R3 and an EMI filter, wherein one end of the resistor R3 is connected with the positive electrode of the power supply, and the other end of the resistor R3 is connected with the EMI filter. One end of the resistor R0 is connected with a + V1 pin of the power supply module, and the other end of the resistor R0 is connected with the first terminal port; the second terminal port is connected to the-V1 pin of the power module. Resistor R0 forms a path with relay K1 and the power module through the RC pin of the power module. The enable control logic of K1 includes positive and negative logic, which are implemented through different terminal ports.
In the output regulating circuit, a resistor R1 can be added between the output and the output positive compensation pin or the resistance value of a resistor R1 can be changed; adding resistor R2 or changing the resistance of resistor R2 between the output regulation and the output negative compensation pin. Specifically, the output regulating circuit comprises a resistor R1 and a resistor R2, and a resistor R1 is connected in parallel with a resistor R2; one end of the resistor R1 is connected with a + V0 pin of the power module, and the other end of the resistor R1 is connected with a TRIM pin of the power module; one end of the resistor R2 is connected with a-V0 pin of the power supply module, and the other end is connected with a TRIM pin of the power supply module.
In this embodiment, the output regulator circuit further includes a capacitor Cin, a capacitor C1, a capacitor Cout, and a load device, and the capacitor C1 and the capacitor Cout are respectively connected in parallel with the load device. One end of the capacitor Cin is connected with a + V1 pin, and the other end of the capacitor Cin is connected with a-V1 pin; one end of the capacitor C1 is connected with a + V0 pin, and the other end of the capacitor C1 is connected with a-V0 pin; one end of the capacitor Cout is connected to the + V0 pin, and the other end is connected to the-V0 pin. The capacitor Cin, the capacitor C1, and the capacitor Cout are electrolytic capacitors. The capacitor Cin may be a ceramic dielectric or a large capacity monolithic capacitor. But should limit its inrush current to avoid damaging the capacitor. In order to further reduce ripple noise and reduce fluctuation of output voltage when the load suddenly changes, the capacitor C1 and the capacitor Cout are connected in parallel at the output end of the power module, and an electrolytic capacitor with low ESR can be adopted, and the maximum value can reach thousands of microfarads. When the device is used, when the output line is longer or the load current is larger, the output voltage compensation sampling point can be close to the load, and the direct current resistance of the wiring is reduced as much as possible. Finally, the power supply circuit of the DC-DC converter can be adjusted by applying the embodiment to any DC-DC converter.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A power supply circuit, comprising:
a filter input circuit for suppressing conducted interference;
the control circuit comprises a power supply module, a first capacitor, a first resistor and a relay; the first capacitor is connected with the filter input circuit in parallel, and the first resistor and the relay are respectively connected with the power supply module; the relay comprises a first terminal port and a second terminal port, the first terminal port is used for connecting the first resistor, and the second terminal port is used for connecting the power module;
an output regulation circuit for regulating an output voltage.
2. The power supply circuit according to claim 1, wherein the filter input circuit comprises a power supply, a second resistor and a power supply filter, one end of the second resistor is connected to the positive electrode of the power supply, and the other end of the second resistor is connected to the filter.
3. The power supply circuit according to claim 2, wherein one end of the first resistor is connected to the first positive voltage pin of the power supply module, and the other end of the first resistor is connected to the first terminal port; the second terminal port is connected with a first negative pressure pin of the power supply module.
4. A power supply circuit as claimed in claim 3, wherein the first resistor is in a path with the relay and the power supply module via resistor pins of the power supply module.
5. The power supply circuit of claim 4, wherein the output regulating circuit comprises a third resistor and a fourth resistor, the third resistor being connected in parallel with the fourth resistor; one end of the third resistor is connected with a second positive voltage pin of the power supply module, and the other end of the third resistor is connected with a voltage regulating pin of the power supply module; one end of the fourth resistor is connected with the second negative voltage pin of the power module, and the other end of the fourth resistor is connected with the voltage regulating pin of the power module.
6. The power supply circuit of claim 5, wherein the output regulator circuit further comprises a first capacitor, a second capacitor, a third capacitor and a load device, and the first capacitor and the second capacitor are respectively connected in parallel with the load device.
7. The power supply circuit according to claim 6, wherein one end of the first capacitor is connected to the first positive voltage pin, and the other end of the first capacitor is connected to the first negative voltage pin; one end of the second capacitor is connected with the second positive voltage pin, and the other end of the second capacitor is connected with the second negative voltage pin; one end of the third capacitor is connected with the second positive-voltage pin, and the other end of the third capacitor is connected with the second negative-voltage pin.
8. The power supply circuit of claim 7, wherein the first capacitor, the second capacitor and the third capacitor are electrolytic capacitors.
9. The power supply circuit according to claim 8, wherein the two ends of the third capacitor are voltage compensation sampling points.
10. A DC-DC converter including a control circuit therein, characterized by further comprising a power supply circuit as recited in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220910913.7U CN217087765U (en) | 2022-04-19 | 2022-04-19 | Power supply circuit and DC-DC converter applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220910913.7U CN217087765U (en) | 2022-04-19 | 2022-04-19 | Power supply circuit and DC-DC converter applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217087765U true CN217087765U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220910913.7U Active CN217087765U (en) | 2022-04-19 | 2022-04-19 | Power supply circuit and DC-DC converter applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217087765U (en) |
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2022
- 2022-04-19 CN CN202220910913.7U patent/CN217087765U/en active Active
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