CN216960255U - Non-polar LED drive circuit powered by DC power supply - Google Patents
Non-polar LED drive circuit powered by DC power supply Download PDFInfo
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- CN216960255U CN216960255U CN202220668805.3U CN202220668805U CN216960255U CN 216960255 U CN216960255 U CN 216960255U CN 202220668805 U CN202220668805 U CN 202220668805U CN 216960255 U CN216960255 U CN 216960255U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a non-polar LED drive circuit powered by a direct-current power supply, which comprises an external power supply and a lamp panel, wherein the voltage of a direct-current output end of the external power supply is 100V-400V; the lamp panel comprises a PCB, a polarity conversion device and a load loop are arranged on the PCB, a constant current device is connected in the load loop in series, the PCB can directly use high-voltage direct current provided by an external power supply as a driving power supply, the power supply voltage of the load loop is improved, and the power supply voltage requirement can be met even if a long LED load is connected in series; no matter the polarity of the polarity converter connected to the external power supply is positive or negative, the load loop can be conducted in the forward direction, so that a light source on the load loop can normally emit light and output stable luminous flux.
Description
Technical Field
The utility model relates to an LED drive circuit, in particular to a nonpolar LED drive circuit powered by a direct current power supply.
Background
Most of the existing LED lamps are provided with a rectifying circuit in the driving process, input alternating current is rectified and reduced in voltage (the voltage is generally 36-12V) and then supplies power for a load loop, and due to the fact that the power supply voltage of the load loop is low, when the length of a string of lights connected in series is large, due to the fact that line loss exists, the power supply voltage of the load loop is reduced, power consumption is increased, and the long length cannot be achieved.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a non-polar LED driving circuit powered by a direct-current power supply.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
a non-polar LED drive circuit powered by a direct current power supply comprises an external power supply and a lamp panel, wherein the direct current output end voltage of the external power supply is 100V-400V; the lamp panel comprises a PCB (printed circuit board), a polarity conversion device and a load loop are arranged on the PCB, and a constant current device is connected in series in the load loop; the polarity conversion device is a rectifier bridge, terminals 2 and 3 of the rectifier bridge are connected with the output end of the external power supply, a terminal 1 is connected with the anode of the load loop, and a terminal 4 is connected with the cathode of the load loop.
The load loop is connected with a load light source in series, the load light source comprises a plurality of LED lamp groups connected in series, and each LED lamp group is formed by connecting a plurality of unit light sources in parallel.
The unit light source is composed of a single or two to four LED lamp beads connected in series.
The constant current device is a constant current diode or a linear constant current chip.
And the load loop is connected with a light source lamp string in series.
The utility model has the beneficial effects that: the PCB can directly use high-voltage direct current provided by an external power supply as a driving power supply, so that the power supply voltage of a load loop is improved, and the power supply voltage requirement can be met even if a long LED load is connected in series; no matter the polarity of the polarity converter connected to the external power supply is positive or negative, the load loop can be conducted in the positive direction, so that a light source on the load loop can normally emit light, and stable luminous flux is output.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic circuit diagram of a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a second embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
referring to fig. 1, a non-polar LED driving circuit powered by a DC power supply includes an external power supply (labeled as DC in the figure) and a lamp panel, wherein a DC output terminal voltage of the external power supply is 100V to 400V; the lamp panel comprises a PCB (printed circuit board), a polarity conversion device (marked with a numeral D in the figure) and a load loop are arranged on the PCB, and a constant current device (marked with a numeral B in the figure) is connected in series in the load loop; the polarity conversion device is a rectifier bridge, terminals 2 and 3 of the rectifier bridge are connected with the output end of the external power supply, terminal 1 is connected with the anode of the load loop, terminal 4 is connected with the cathode of the load loop, the PCB can directly use high-voltage direct current provided by the external power supply as a driving power supply, the power supply voltage of the load loop is improved, and the power supply voltage requirement can be met even if the LED load is connected in series for a long time; no matter the polarity of the polarity converter connected to the external power supply is positive or negative, the load loop can be conducted in the positive direction, so that a light source on the load loop can normally emit light, and stable luminous flux is output.
The load circuit is connected with a load light source in series, the load light source comprises a plurality of LED lamp groups connected in series, the LED lamp groups are formed by connecting a plurality of unit light sources in parallel, the series-parallel and series-series hybrid connection mode can effectively solve the problems of large error of VF values of serial connection and parallel connection of the LED lamp beads and uneven load, and the load light source can be reliably driven to emit bright lighting rays.
The unit light source is composed of the single LED lamp beads, the reliability of each LED lamp bank when the single LED fails and opens the circuit can be improved, and the whole light emitting effect of the light source module can not be influenced even if the single LED fails and opens the circuit.
The unit light source also can be composed of two to four LED lamp beads connected in series, when a certain LED lamp group is opened due to the failure of a single LED lamp bead, the LED lamp group is turned off, the current increase of each remaining LED lamp bead in the LED lamp group connected in parallel can be little, the normal use of other LED lamp groups is not influenced, and therefore the whole light emitting effect is not influenced.
The constant current device is a constant current diode or a linear constant current chip, the linear constant current chip can adopt XL040, XL030, XL020 or XL010 type constant current chips, and the characteristics of stable constant current and small size enable the operation of the driving circuit to be more reliable.
Example two:
referring to fig. 2, a non-polar LED driving circuit powered by a dc power supply includes an external power supply and a lamp panel, wherein a dc output terminal voltage of the external power supply is 100V to 400V; the lamp panel comprises a PCB (printed circuit board), a polarity conversion device and a load loop are arranged on the PCB, and a constant current device is connected in series in the load loop; the polarity conversion device is a rectifier bridge, terminals 2 and 3 of the rectifier bridge are connected with the output end of the external power supply, a terminal 1 is connected with the anode of the load loop, and a terminal 4 is connected with the cathode of the load loop. The constant current device is a constant current diode or a linear constant current chip. The load circuit is connected in series with a light source lamp string (marked as E in the figure), which is a difference between the embodiment and the first embodiment, the light source lamp string can emit bright illumination light, and is easier to produce.
The utility model adopts the rectifier bridge to convert the positive and negative poles of the input power supply, so that the light source can be lightened under positive and negative voltages, the assembly errors of the positive and negative poles can be effectively prevented, meanwhile, the constant current device provides stable driving current for the light source, the light source outputs stable luminous flux, the series-parallel connection mode of the light source can effectively solve the problems of large errors of VF values of series connection and parallel connection of LED lamp beads and uneven load, and the whole driving circuit has simple and reasonable structure and low production cost while accepting the input of a high-voltage direct-current power supply.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (5)
1. A non-polar LED drive circuit powered by a direct current power supply comprises an external power supply and a lamp panel, and is characterized in that the voltage of a direct current output end of the external power supply is 100V-400V; the lamp panel comprises a PCB (printed circuit board), a polarity conversion device and a load loop are arranged on the PCB, and a constant current device is connected in series in the load loop; the polarity conversion device is a rectifier bridge, terminals 2 and 3 of the rectifier bridge are connected with the output end of the external power supply, a terminal 1 is connected with the anode of the load loop, and a terminal 4 is connected with the cathode of the load loop.
2. The non-polar LED driving circuit of claim 1, wherein a load light source is connected in series in the load circuit, the load light source comprises a plurality of LED lamp sets connected in series, and the LED lamp sets are formed by connecting a plurality of unit light sources in parallel.
3. The non-polar LED driving circuit according to claim 2, wherein the unit light source is composed of a single or two to four LED beads connected in series.
4. The non-polar LED driving circuit according to claim 1, wherein the constant current device is a constant current diode or a linear constant current chip.
5. The non-polar LED driving circuit of claim 1, wherein a light source string is connected in series in the load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220668805.3U CN216960255U (en) | 2022-03-26 | 2022-03-26 | Non-polar LED drive circuit powered by DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220668805.3U CN216960255U (en) | 2022-03-26 | 2022-03-26 | Non-polar LED drive circuit powered by DC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216960255U true CN216960255U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220668805.3U Active CN216960255U (en) | 2022-03-26 | 2022-03-26 | Non-polar LED drive circuit powered by DC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216960255U (en) |
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2022
- 2022-03-26 CN CN202220668805.3U patent/CN216960255U/en active Active
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