CN211406355U - Three-section dimming LED down lamp - Google Patents
Three-section dimming LED down lamp Download PDFInfo
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- CN211406355U CN211406355U CN202020016300.XU CN202020016300U CN211406355U CN 211406355 U CN211406355 U CN 211406355U CN 202020016300 U CN202020016300 U CN 202020016300U CN 211406355 U CN211406355 U CN 211406355U
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- led
- control chip
- dimming
- circuit board
- dimming control
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Abstract
A three-section dimming LED down lamp comprises a power supply, a cup barrel connected with the power supply, and a circuit board installed in the cup barrel, wherein a plurality of LED lamp beads are welded on the circuit board, a face cover at the edge of a cup barrel opening and a light scattering plate covering the cup barrel opening are installed, a dimming control chip is further arranged on the circuit board, the dimming control chip is provided with a constant current output port capable of outputting multistage current, a plurality of LED lamp beads are connected in series to form an LED series unit, and the negative electrode of the LED series unit is connected to the constant current output port. Because the circuit board is provided with the dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage current, and the cathode of the series unit is connected to the constant current output port; therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.
Description
Technical Field
The utility model relates to a LED lamps and lanterns specifically disclose a three-section LED down lamp of adjusting luminance.
Background
The dimming mode of the existing LED lamp mainly comprises two modes of stepless dimming and segmented dimming. The electrodeless dimming needs to be provided with a special electrodeless dimmer switch, so that the cost is high and the use is inconvenient; the sectional dimming requires installation of a sectional dimmer, so that the cost is high, and the installation is complex due to the need of professional electrician installation.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a dimmable LED lamp with low cost, simple installation and convenient use, aiming at the problems in the prior art.
For solving prior art problem, the utility model discloses a three-section LED down lamp of adjusting luminance, including the power, with the cup section of thick bamboo that the power is connected is installed circuit board in the cup section of thick bamboo, the welding has many LED lamp pearls on the circuit board, installs the face guard at cup tube mouth edge is in with the cover the diffusion sheet of cup tube mouth, still be provided with the light control chip of adjusting luminance on the circuit board, the light control chip of adjusting luminance has the constant current output port of exportable multistage electric current, LED series unit is constituteed to a plurality of LED lamp pearl series connection, a plurality of LED series unit's negative pole is connected to constant current output port.
The utility model has the advantages that: the utility model discloses because be provided with the light control chip in the circuit board, the light control chip has the constant current output port of exportable multistage electric current, the negative pole of series connection unit is connected to constant current output port. Therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.
Drawings
Fig. 1 is the assembly structure diagram of the present invention.
Fig. 2 is a schematic view of the appearance structure of the present invention.
Fig. 3 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
For further understanding of the features and technical means, as well as the specific objects and functions of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 and 2. The utility model provides a three-section LED down lamp of adjusting luminance, includes power 11, with a cup section of thick bamboo 12 that the power is connected is installed circuit board 3 in a cup section of thick bamboo 12, the welding has many LED lamp pearls 4 on circuit board 3, installs face guard 13 at cup tube mouth edge and cover the diffusion sheet 14 of cup tube mouth, power 11 pass through power cord 2 with circuit board 3 electricity is connected.
Referring to fig. 3, a three-segment dimming LED tube lamp circuit structure. The plurality of LED beads 4 are electrically connected in a manner that two LED beads 4 are connected in parallel to form a parallel module 41, and a plurality of the parallel modules 41 are connected in series to form an LED series unit 40. The utility model discloses a rectifier circuit can set up in external drive power supply, also can set up on circuit board 3, the utility model discloses preferred the latter. Specifically, a patch rectifier bridge 5 is arranged on the circuit board 3, the input end of the patch rectifier bridge 5 can be connected with 220V or 110V alternating current mains supply, and the output end of the patch rectifier bridge 5 is connected with a dimming control chip 6 and the LED series unit 40. The pin specification of the dimming control chip 6 is shown in the following table:
| pin name | Description of the invention |
| VDD | Chip analog power port |
| VPP | Chip digital power port |
| S1 | Current detection port I |
| S2 | Current detection port two |
| D2 | Constant current output port I |
| D1 | Constant current output port two |
| NC | Hollow foot |
| VIN | Chip power supply port |
| GND | Cathode (bottom heat radiation) |
The VDD pin and the VPP pin of the dimming control chip 6 are connected to the negative electrode of the patch rectifier bridge 5 through capacitors C1 and C2, respectively. The capacitor C1 is used for controlling the delay time of the first turn-on of the lamp tube, the capacitor C2 is used for controlling the dimming time sequence, and when the voltage of VPP rises to 3V or above, the digital logic is in a normal working state; when the voltage of VPP drops below 2.6V, the digital logic is automatically cleared to make the IC in an initial state. The dimming control chip is also provided with S1 pins and S2 pins, the S1 pin is connected to the negative pole of the patch rectifier bridge 5 through resistors R1 and R2, the S2 pin is connected to the negative pole of the patch rectifier bridge 5 through R2, and the resistors R1 and R2 are used for adjusting the output currents of the D1 pins and the D2 pins. Inputs from D1 and D2 pinsThe current can be divided into three stages from large to small, specifically I1＝1/R2，I2＝0.5/R2，I31/(R1+ R2). The D1/D2 pin is connected to the cathode of the LED series unit 40, the D1/D2 pin of the present invention can be connected to one LED series unit 40 or D1/D2 pin respectively and then connected to the same LED series unit 40 after being merged. The positive pole of the patch rectifier bridge 5 is connected to the VIN pin through a resistor R3, and the resistor R3 is used for adjusting the input power of the dimming control chip 6. The GND pin is connected to the negative pole of the patch rectifier bridge 5. The anode of the LED series unit 40 is connected to the anode of the patch rectifier bridge 5. And the L/N input ends of the patch rectifier bridges 5 are respectively connected with an L/N power supply lead. In order to eliminate the stroboscopic effect of the light-emitting diode, the output end of the patch rectifier bridge 5 is further connected with a filter circuit 7, and the filter circuit 7 comprises an electrolytic capacitor C3 and a resistor R4 which are connected in parallel, and a diode D1 which is connected with the electrolytic capacitor C3 and the resistor R4 in series.
The utility model discloses a control principle is through the conduction current of the inside logic control D1D 2 pin of chip 6 that adjusts luminance, when the voltage of input takes place to open and close, by the inside logic control module control current-limiting reference voltage of IC, makes the electric current of flowing through LED change to dynamic regulation LED's light intensity reaches the mesh of adjusting luminance. Specifically, when the power switch on the power wire L/N is turned on for the first time, the dimming control chip 6 supplies power, and the VDD pin detects that the capacitor C1 is fully charged, and then the LED series unit 40 is controlled to light up, at this time, the output current of the D1/D2 pin is I1The delay time for the LED series unit 40 to be turned on is controlled by the capacitance of the capacitor C1. When the power switch is opened and closed for the first time, whether the opening and closing operation interval time belongs to the time set by the program is detected through the charging and discharging time of the capacitor C2, and if the opening and closing operation interval time belongs to the time set by the program, the power switch is switched to I2(ii) a If the time interval is less than the interval time, the switching is not carried out, if the time interval is more than the interval time, the digital logic is automatically cleared, and the IC returns to the initial state. By analogy, the output current sequence is I1To I2To I3To I1And (5) repeatedly circulating.
When in specific application, the utility model I1Set to 100% brightness, I2Set to 50% brightness, I3Set to 20% brightness, charge and discharge time of C2 was set to 5 seconds. Namely, when the switch is closed for the first time, the LED series unit 40 has 100% brightness, the switch is opened and closed once within 5 seconds, the LED series unit 40 is switched to 50% brightness, and the like until the brightness of 20% returns to 100% brightness.
The utility model is characterized in that a patch rectifier bridge is arranged in the circuit board, the output end of the patch rectifier bridge is connected with a dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage current, the cathode of the LED series unit is connected to the constant current output port, and the anode of the LED series unit is connected to the anode of the patch rectifier bridge; therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a three-section LED down lamp of adjusting luminance, includes the power, with a cup section of thick bamboo that the power is connected is installed circuit board in the cup section of thick bamboo, the welding has many LED lamp pearls on the circuit board, installs the face guard at cup tube mouth edge is in with the cover the diffusion sheet of cup tube mouth, its characterized in that: the LED dimming control circuit is characterized in that the circuit board is also provided with a dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage currents, the LED lamp beads are connected in series to form an LED series unit, and the cathodes of the LED series units are connected to the constant current output port.
2. A three-section dimming LED downlight according to claim 1, wherein: and the circuit board is also provided with a patch rectifier bridge, and the output end of the patch rectifier bridge is connected with the dimming control chip and the LED series unit.
3. A three-section dimming LED downlight according to claim 2, wherein: the dimming control chip is also provided with an analog power port and a digital power port, and the analog power port and the digital power port are respectively connected to the negative electrode of the patch rectifier bridge through capacitors.
4. A three-section dimming LED downlight according to claim 2, wherein: the dimming control chip is further provided with a first current detection port and a second current detection port, and the first current detection port and the second current detection port are respectively connected to the negative electrode of the patch rectifier bridge through resistors.
5. A three-section dimming LED downlight according to claim 2, wherein: and the output end of the patch rectifier bridge is also connected with a filter circuit.
6. A three-section dimming LED down lamp according to claim 5, wherein: the filter circuit comprises an electrolytic capacitor and a resistor which are connected in parallel, and a diode which is connected with the electrolytic capacitor and the resistor in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020016300.XU CN211406355U (en) | 2020-01-03 | 2020-01-03 | Three-section dimming LED down lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020016300.XU CN211406355U (en) | 2020-01-03 | 2020-01-03 | Three-section dimming LED down lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211406355U true CN211406355U (en) | 2020-09-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020016300.XU Active CN211406355U (en) | 2020-01-03 | 2020-01-03 | Three-section dimming LED down lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211406355U (en) |
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2020
- 2020-01-03 CN CN202020016300.XU patent/CN211406355U/en active Active
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