CN221354546U - Common negative electrode driving circuit for realizing multipath constant power output by single-path constant current chip - Google Patents
Common negative electrode driving circuit for realizing multipath constant power output by single-path constant current chip Download PDFInfo
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- CN221354546U CN221354546U CN202323319879.XU CN202323319879U CN221354546U CN 221354546 U CN221354546 U CN 221354546U CN 202323319879 U CN202323319879 U CN 202323319879U CN 221354546 U CN221354546 U CN 221354546U
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Abstract
The utility model discloses a common negative electrode driving circuit for realizing multipath constant power output by a single-path constant current chip, which comprises a power input end, a common negative electrode LED structure, a single-path constant current driving circuit, a decoding and PWM control circuit and a PMOS tube control circuit, wherein the single-path constant current driving circuit is connected with the power input end; the power supply input end is connected to the single-path constant current driving circuit, and the output end of the single-path constant current driving circuit is connected to the cathode of the common-cathode LED structure through the energy storage inductor; the control end of the decoding and PWM control circuit is connected with the control end of the single-channel constant current driving circuit, the PWM signal output end of the decoding and PWM control circuit is connected with the PMOS tube control circuit, and the PMOS tube control circuit is connected in series with the positive end of the common negative electrode LED structure. The utility model has reasonable structure, simple structure, high dimming and color mixing control effectiveness and stability, and can ensure constant output power and dimming and color mixing effects through the decoding and PWM control circuit, thereby having strong practicability.
Description
Technical Field
The utility model belongs to the technical field of lamp driving circuits, and particularly relates to a common negative electrode driving circuit for realizing multipath constant power output by a single-path constant current chip.
Background
Along with the maturity of LED lamps and lanterns technique, various RGB lamps and lanterns develop rapidly, can all have corresponding drive circuit when RGB lamps and lanterns use, prior art's drive circuit not only very complicated, greatly increased the cost of drive dimming mixing of colors control, be unfavorable for overhauling and maintaining, it can't make RGB lamps and lanterns reach constant power in driving moreover to cause the stationarity of adjusting luminance mixing of colors to receive the restriction, influence the normal lighting lamp color of RGB lamps and lanterns, so suitability and practicality are restricted.
Disclosure of Invention
The utility model aims to provide a common negative electrode driving circuit which is reasonable in structural arrangement and beneficial to improving the dimming, color mixing and stability and realizes multi-path constant power output by a single-path constant current chip.
The technical scheme for realizing the aim of the utility model is that the common negative electrode driving circuit for realizing multipath constant power output by a single-path constant current chip comprises a power input end, a common negative electrode LED structure, a single-path constant current driving circuit, a decoding and PWM control circuit and a PMOS tube control circuit;
The power input end is connected to the single-path constant current driving circuit, and the output end of the single-path constant current driving circuit is connected to the cathode of the common-cathode LED structure through an energy storage inductor;
The positive electrode of the power input end is connected to the positive electrode of the common negative electrode LED structure;
The control end of the decoding and PWM control circuit is connected with the control end of the single-channel constant current driving circuit, the PWM signal output end of the decoding and PWM control circuit is connected with the PMOS tube control circuit, and the PMOS tube control circuit is connected in series with the positive end of the common-negative-electrode LED structure.
Further preferred are: the decoding and PWM control circuit comprises a decoding circuit and a constant power chip PWM control circuit;
the data output end of the decoding circuit is connected with the signal input end of the constant power chip PWM control circuit;
The control end of the constant power chip PWM control circuit is connected with the control end of the single-channel constant current drive circuit, and the PWM output end connected with the control end of the PMOS tube control circuit is connected with the control end of the single-channel constant current drive circuit.
Further preferred are: the common negative electrode LED structure comprises a common negative electrode LED-R lamp bead, an LED-G lamp bead, an LED-B lamp bead and an LED-W lamp bead;
The PMOS tube control circuit comprises four PMOS tubes, wherein the four PMOS tubes are respectively connected between the positive electrode of the power input end and the positive electrode of the LED-R lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-G lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-B lamp bead and between the positive electrode of the power input end and the positive electrode of the LED-W lamp bead;
PWM output ends of the PWM control circuit are respectively connected with control ends of the four PMOS tubes.
Further preferred are: and a freewheeling diode is arranged between the output end of the single-path constant current driving circuit and the positive electrode of the power input end.
Further preferred are: the single-path constant current driving circuit is a DC-DC constant current chip.
The utility model has the positive effects that: the utility model has reasonable structure, is provided with a single-channel constant current driving circuit, a decoding and PWM control circuit and a PMOS tube control circuit, has simpler structure, is beneficial to improving the effectiveness and stability of dimming and toning control, and can ensure the constant power output by the decoding and PWM control circuit, thereby ensuring the dimming and toning effect and having strong practicability.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:
fig. 1 is a schematic circuit structure of the present utility model.
Reference numerals: the LED power supply comprises a power input end 1, a common negative electrode LED structure 2, a one-way constant current driving circuit 3, a decoding and PWM control circuit 4, a decoding circuit 41, a constant power chip PWM control circuit 42, a PMOS tube control circuit 5 and a freewheeling diode 6.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1, a common negative electrode driving circuit for realizing multipath constant power output by a single-path constant current chip comprises a power input end 1, a common negative electrode LED structure 2, a single-path constant current driving circuit 3, a decoding and PWM control circuit 4 and a PMOS tube control circuit 5; in this embodiment, the single-path constant current driving circuit is a DC-DC constant current chip. The voltage of the power input end of the LED lamp is 24V, and the common negative electrode LED structure comprises an LED-R lamp bead, an LED-G lamp bead, an LED-B lamp bead and an LED-W lamp bead which are of a common negative electrode; therefore, the constant power adjustment control can be independently carried out on different lamp beads, the light color effect of illumination can be guaranteed, and the practicability is high.
When the LED driving circuit is connected, the power input end is connected to the single-path constant current driving circuit, and the output end of the single-path constant current driving circuit is connected to the negative electrode of the common negative electrode LED structure through the energy storage inductor L1; the positive electrode of the power input end is connected to the positive electrode of the common negative electrode LED structure; the control end of the decoding and PWM control circuit is connected with the control end of the single-channel constant current driving circuit, the PWM signal output end of the decoding and PWM control circuit is connected with the PMOS tube control circuit, and the PMOS tube control circuit is connected in series with the positive end of the common-negative-electrode LED structure.
In this embodiment, the decoding and PWM control circuit includes a decoding circuit 41 and a constant power chip PWM control circuit 42; the data output end of the decoding circuit is connected with the signal input end of the constant power chip PWM control circuit; the control end of the constant power chip PWM control circuit is connected with the control end of the single-channel constant current drive circuit, and the PWM output end connected with the control end of the PMOS tube control circuit is connected with the control end of the single-channel constant current drive circuit. In this embodiment, the decoding circuit adopts a DMX512 decoding chip, and the constant power chip PWM control circuit adopts a conventional chip, which is not described in detail.
The PMOS tube control circuit comprises four PMOS tubes, wherein the four PMOS tubes are respectively connected between the positive electrode of the power input end and the positive electrode of the LED-R lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-G lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-B lamp bead and between the positive electrode of the power input end and the positive electrode of the LED-W lamp bead; PWM output ends of the PWM control circuit are respectively connected with control ends of the four PMOS tubes. In this embodiment, the PMOS tube is of a conventional structure in the prior art, and is simply applied, and is mainly used for controlling the corresponding lamp beads to be turned on and off, and mutually cooperating to realize dimming and color mixing.
And a freewheel diode 6 is arranged between the output end of the single-path constant current drive circuit and the positive electrode of the power supply input end. In this embodiment, the freewheeling diode is of a conventional structure and is simply applied.
The utility model has the positive effects that: the utility model has reasonable structure, is provided with a single-channel constant current driving circuit, a decoding and PWM control circuit and a PMOS tube control circuit, has simpler structure, is beneficial to improving the effectiveness and stability of dimming and toning control, and can ensure the constant power output by the decoding and PWM control circuit, thereby ensuring the dimming and toning effect and having strong practicability.
The standard components used in this embodiment may be purchased directly from the market, but the nonstandard structural components described in the specification may also be obtained directly by unambiguous processing according to the common general knowledge in the prior art, and meanwhile, the connection manner of each component adopts the conventional means mature in the prior art, and the machinery, the components and the equipment all adopt the conventional types in the prior art, so that no specific description will be made here.
It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While those obvious variations or modifications which come within the spirit of the utility model remain within the scope of the utility model.
Claims (5)
1. The utility model provides a common negative pole drive circuit that single way constant current chip realized multichannel constant power output, includes power input end and common negative pole LED structure, its characterized in that: the system is also provided with a single-path constant current driving circuit, a decoding and PWM control circuit and a PMOS tube control circuit;
The power input end is connected to the single-path constant current driving circuit, and the output end of the single-path constant current driving circuit is connected to the cathode of the common-cathode LED structure through an energy storage inductor;
The positive electrode of the power input end is connected to the positive electrode of the common negative electrode LED structure;
The control end of the decoding and PWM control circuit is connected with the control end of the single-channel constant current driving circuit, the PWM signal output end of the decoding and PWM control circuit is connected with the PMOS tube control circuit, and the PMOS tube control circuit is connected in series with the positive end of the common-negative-electrode LED structure.
2. The common negative electrode driving circuit for realizing multi-channel constant power output by using a single-channel constant current chip according to claim 1, wherein the common negative electrode driving circuit is characterized in that: the decoding and PWM control circuit comprises a decoding circuit and a constant power chip PWM control circuit;
the data output end of the decoding circuit is connected with the signal input end of the constant power chip PWM control circuit;
The control end of the constant power chip PWM control circuit is connected with the control end of the single-channel constant current drive circuit, and the PWM output end connected with the control end of the PMOS tube control circuit is connected with the control end of the single-channel constant current drive circuit.
3. The common negative electrode driving circuit for realizing multi-channel constant power output by using a single-channel constant current chip according to claim 2, wherein the common negative electrode driving circuit is characterized in that: the common negative electrode LED structure comprises a common negative electrode LED-R lamp bead, an LED-G lamp bead, an LED-B lamp bead and an LED-W lamp bead;
The PMOS tube control circuit comprises four PMOS tubes, wherein the four PMOS tubes are respectively connected between the positive electrode of the power input end and the positive electrode of the LED-R lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-G lamp bead, between the positive electrode of the power input end and the positive electrode of the LED-B lamp bead and between the positive electrode of the power input end and the positive electrode of the LED-W lamp bead;
PWM output ends of the PWM control circuit are respectively connected with control ends of the four PMOS tubes.
4. The common negative electrode driving circuit for realizing multi-channel constant power output by using a single-channel constant current chip according to claim 3, wherein the common negative electrode driving circuit is characterized in that: and a freewheeling diode is arranged between the output end of the single-path constant current driving circuit and the positive electrode of the power input end.
5. The common negative electrode driving circuit for realizing multi-channel constant power output by using the single-channel constant current chip according to claim 4, wherein the common negative electrode driving circuit is characterized in that: the single-path constant current driving circuit is a DC-DC constant current chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323319879.XU CN221354546U (en) | 2023-12-06 | 2023-12-06 | Common negative electrode driving circuit for realizing multipath constant power output by single-path constant current chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323319879.XU CN221354546U (en) | 2023-12-06 | 2023-12-06 | Common negative electrode driving circuit for realizing multipath constant power output by single-path constant current chip |
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| Publication Number | Publication Date |
|---|---|
| CN221354546U true CN221354546U (en) | 2024-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323319879.XU Active CN221354546U (en) | 2023-12-06 | 2023-12-06 | Common negative electrode driving circuit for realizing multipath constant power output by single-path constant current chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN221354546U (en) |
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2023
- 2023-12-06 CN CN202323319879.XU patent/CN221354546U/en active Active
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