CN212785935U - Lamp tube built-in LED driving power supply - Google Patents
Lamp tube built-in LED driving power supply Download PDFInfo
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- CN212785935U CN212785935U CN202021983957.XU CN202021983957U CN212785935U CN 212785935 U CN212785935 U CN 212785935U CN 202021983957 U CN202021983957 U CN 202021983957U CN 212785935 U CN212785935 U CN 212785935U
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Abstract
The utility model discloses a built-in LED drive power supply of fluorescent tube, including power factor correction module, drive control module and afterflow module, the input of power factor correction module is connected with the power, and the output of power factor correction module is connected with the input of drive control module, and power factor correction module corrects input power, exports energy to drive control module; the output end of the drive control module is connected with the input end of the follow current module, and the drive control module transmits energy to the follow current module through a transformer T1 by using a resonant frequency conversion circuit; the output end of the follow current module is connected with the LED lamp beads, and the follow current module transmits the received energy to the LED lamp beads through a diode D1; the power density of the built-in isolated driving power supply of the LED lamp tube is improved by more than two times, the size of the power supply is reduced, the power supply is arranged in the lamp tube under the condition of meeting safety standards and EMC standards, and the high-requirement application scene and application trend of the LED lamp tube are adapted.
Description
Technical Field
The utility model belongs to the technical field of the power, a built-in LED drive power supply of fluorescent tube is related to.
Background
At present, in many application occasions, the LED lamp tube is required to have large power, small occupied space, light weight and convenient installation and disassembly, such as movie shooting, concerts, commercial speeches or various propaganda activities and the like. Therefore, the LED driving power supply is required to have high power density and small volume, and the high-power supply can be arranged in the LED lamp tube with narrow space so as to realize the application requirement trend. In the prior art, an isolated driving power supply is arranged in an LED lamp tube, and the output power cannot exceed 50W due to low power density, so that more lamps are needed to achieve the required brightness; the LED lamp tube power supply in the prior art adopts the technology of firstly storing energy and then releasing the energy, so that the larger the power of the power supply is, the larger the volumes of an energy storage inductor (transformer) and a capacitor on the power supply are, and the lower the overall power density of the power supply is. And if the power of the power supply is more than 50W, the power supply is large in size and can only be arranged outside the LED lamp tube. Both the above two situations do not meet the application requirements and trends, and potential safety hazards may be caused to a studio and the like due to the increase of the weight of the lighting system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a built-in LED drive power supply of fluorescent tube, it makes power density provide to prior art more than the twice, accords with under safety standard and EMC (electromagnetic compatibility) standard, has realized that the 100W power is arranged in inside the fluorescent tube, has adapted to LED fluorescent tube high requirement well and has used scene and application trend.
The utility model discloses a built-in LED drive power supply of fluorescent tube, drive power supply includes power factor correction module, drive control module and afterflow module, the input of power factor correction module is connected with the power, the output of power factor correction module with the input of drive control module is connected, power factor correction module corrects input power, output energy arrives drive control module; the output end of the drive control module is connected with the input end of the follow current module, and the drive control module transmits energy to the follow current module through a transformer T1 by using a resonant frequency conversion circuit; the output end of the follow current module is connected with the LED lamp beads, and the follow current module transmits the received energy to the LED lamp beads through the diode D1.
The LED driving power supply arranged in the lamp tube can be divided into three modules according to the principle of the LED driving power supply under the premise of meeting safety regulations and EMC standards, wherein the first module is a power factor correction module (preceding stage) to ensure that the power factor is greater than a set value; the second is a drive control module (middle stage), energy is transmitted to the rear by a transformer by adopting a new resonance frequency conversion technology, the input and the output of the energy are simultaneously carried out by the transformer, and the energy does not need to be stored fully and then transmitted to the rear, so that the volume of the transformer can be greatly reduced, and the power density is improved; the third is a follow current module (rear stage) which transmits the energy output by the middle stage to the LED lamp bead through the Schottky diode to ensure that the positive and negative polarities of the current and the voltage output to the LED are constant.
The utility model has the advantages that:
the utility model discloses a built-in LED drive power supply of fluorescent tube can make built-in isolated drive power supply power density of LED fluorescent tube promote more than the twice, reduces the power supply volume by a wide margin, accords with under safety standard and EMC (electromagnetic compatibility) standard, has realized that the 100W power is arranged in inside the fluorescent tube, has adapted to LED fluorescent tube high requirement well and has used scene and application trend.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic circuit diagram of the LED driving power supply built in the lamp tube of the present invention.
Fig. 2 is a block diagram of the structure of the LED driving power supply built in the lamp tube of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
Example 1
A lamp tube built-in LED driving power supply is disclosed, referring to fig. 1 and fig. 2, the driving power supply comprises a power factor correction module, a driving control module and a follow current module, and is characterized in that the input end of the power factor correction module is connected with a power supply, the output end of the power factor correction module is connected with the input end of the driving control module, and the power factor correction module corrects input power and outputs energy to the driving control module; the output end of the driving control module is connected with the input end of the follow current module, and the driving control module transmits energy to the follow current module through a transformer T1 by using a resonant frequency conversion circuit; the output end of the follow current module is connected with the LED lamp beads, and the follow current module transmits the received energy to the LED lamp beads through a diode D1.
The built-in LED drive power supply of fluorescent tube of this embodiment, under the prerequisite of according with safety regulation and EMC standard, its LED drive power supply principle does: the driving power supply comprises three modules, wherein the first module is a power factor correction module (front stage) which ensures that the power factor is larger than a set value of 0.95 for example; the second is a drive control module (middle stage), energy is transmitted to the rear by a transformer by adopting a new resonance frequency conversion technology, the input and the output of the energy are simultaneously carried out by the transformer, and the energy does not need to be stored fully and then transmitted to the rear, so that the volume of the transformer can be greatly reduced, and the power density is improved; the third is a follow current module (rear stage) which transmits the energy output by the middle stage to the LED lamp bead through the Schottky diode to ensure that the positive and negative polarities of the current and the voltage output to the LED are constant.
Example 2
The LED driving power supply is built in the lamp tube of embodiment 1, and specifically, the power factor correction module includes a diode bridge, where the diode bridge is used to rectify the input voltage.
In some embodiments, the pfc module includes a filter capacitor C1, which is used for C1 to control current noise.
Specifically, the diode D1 may be a schottky diode, which is used to keep the positive and negative polarities of the current and the voltage output to the LED constant.
Specifically, an electrolytic capacitor C2 may be connected between the voltage output ends of the flywheel modules.
In a further specific embodiment, the driving control module includes an integrated circuit U1, and the integrated circuit U1 is used for controlling power efficiency.
Specifically, the integrated circuit U1 may be connected to the gate of the fet M through a load resistor R.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same, although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify or equally replace the specific embodiments of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims of the present invention.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (5)
1. A lamp tube built-in LED driving power supply comprises a power factor correction module, a driving control module and a follow current module, and is characterized in that the input end of the power factor correction module is connected with a power supply, the output end of the power factor correction module is connected with the input end of the driving control module, and the power factor correction module corrects input power and outputs energy to the driving control module; the output end of the driving control module is connected with the input end of the follow current module, and the driving control module transmits energy to the follow current module through a transformer T1 by using a resonant frequency conversion circuit; the output end of the follow current module is connected with the LED lamp beads, and the follow current module transmits the received energy to the LED lamp beads through a diode D1.
2. The LED driving power supply of claim 1, wherein said power factor correction module comprises a diode bridge for rectifying an input voltage.
3. The LED driving power supply with built-in lamp tube as claimed in claim 1, wherein the power factor correction module comprises a filter capacitor C1, and the filter capacitor is used for controlling current noise by C1.
4. The LED driving power supply as claimed in claim 1, wherein the diode D1 is a schottky diode for keeping constant the positive and negative polarities of the current and voltage outputted to the LED.
5. The LED driving power supply with built-in lamp tube as claimed in claim 1, wherein an electrolytic capacitor C2 is connected between the voltage output terminals of the follow current module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021983957.XU CN212785935U (en) | 2020-09-11 | 2020-09-11 | Lamp tube built-in LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021983957.XU CN212785935U (en) | 2020-09-11 | 2020-09-11 | Lamp tube built-in LED driving power supply |
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| Publication Number | Publication Date |
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| CN212785935U true CN212785935U (en) | 2021-03-23 |
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| CN202021983957.XU Active CN212785935U (en) | 2020-09-11 | 2020-09-11 | Lamp tube built-in LED driving power supply |
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