CN219659954U - LED product and constant current driving source thereof - Google Patents
LED product and constant current driving source thereof Download PDFInfo
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- CN219659954U CN219659954U CN202320534497.XU CN202320534497U CN219659954U CN 219659954 U CN219659954 U CN 219659954U CN 202320534497 U CN202320534497 U CN 202320534497U CN 219659954 U CN219659954 U CN 219659954U
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Abstract
The utility model discloses an LED product and a constant current driving source thereof, and belongs to the technical field of LED linear driving. The constant-current driving source provided by the utility model comprises a power supply, an intelligent controller and a controlled light source; the power supply is integrated on the PCB, and the controlled light source is integrated on the aluminum substrate; the intelligent controller is integrated on the PCB or the aluminum substrate; the PCB board is electrically connected with the aluminum substrate through a connector. The utility model is realized by adopting an aluminum substrate and PCB board mode, the power supply generating electromagnetic interference is modularized and integrated into a single PCB unit, the controlled light source or lamp of the LED is placed on the aluminum substrate, and the aluminum substrate serving as a carrier is connected with the PCB unit through a connector signal, so that the influence of electromagnetic interference and the like generated by the power supply of intelligent driving on the performance of the device is avoided, and the performance of the device is improved.
Description
Technical Field
The utility model relates to the technical field of LED linear driving, in particular to an LED product and a constant current driving source thereof.
Background
Most of the LED products adopt a DOB (Driver-On-Board) driving mode, in which related components of a constant current source are integrated On an aluminum substrate, however, with rapid increase of requirements of the LED products such as an intelligent mode or a PWM dimming mode, the related components generate electromagnetic interference, so that performance of a limited driving source is poor, and related performance requirements, such as EMC (Electro Magnetic Compatibility ) standards, cannot be met.
Therefore, in order to meet the requirements of relevant performance standards when the intelligent mode or the PWM dimming mode is met, the current implementation mode is to place a plurality of inductors, capacitors and the like on an aluminum substrate to be stacked, and the implementation cost of the implementation mode is very high, and the performance improvement is limited.
Disclosure of Invention
In order to solve the problem that the conventional DOB constant current driving source cannot meet the requirements of relevant performance, the utility model provides the LED constant current driving source.
The utility model is realized by the following technical scheme:
an LED constant current driving source comprises a power supply, an intelligent controller and a controlled light source; the power supply is integrated on the PCB, and the controlled light source is integrated on the aluminum substrate;
the intelligent controller is integrated on the PCB or the aluminum substrate;
the PCB is electrically connected with the aluminum substrate through a connector;
the power supply generates a power supply signal to drive the intelligent controller to output a signal with a duty ratio to control the controlled light source to be turned on/off.
According to the utility model, the drive circuit of the high-frequency switch signal or other circuits with electromagnetic interference is integrated through the PCB, and the drive circuit is connected with the aluminum substrate through the connector to form the LED constant current drive source after modularization.
As a preferred embodiment, the PCB of the present utility model includes a substrate;
the top layer of the substrate is a power supply or an element wiring layer with a signal output device with a duty ratio;
the bottom layer of the substrate is a ground wire copper foil layer, and has a shielding effect.
The utility model may employ, but is not limited to, FR4 or other single or multi-layer board integrated high frequency switching signal drive circuits or other circuits with electromagnetic interference.
As a preferred embodiment, the substrate of the present utility model is a substrate made of FR4 or an insulating material.
As a preferred embodiment, the aluminum substrate of the present utility model is further integrated with a rectifier bridge; the controlled light source comprises a linear drive IC and an LED group;
the rectifier bridge converts an external alternating current power supply into a pulsating direct current power supply, and the pulsating direct current power supply output by the rectifier bridge supplies power for the LED group and power for a power supply on the PCB;
the intelligent controller outputs PWM signals under the drive of power supply signals output by the power supply;
the linear driving IC controls on/off of the LED group under the PWM signal driving.
As a preferred embodiment, the connector of the present utility model includes an input interface and an output interface on a PCB board;
the input interface on the PCB comprises an external power interface and is used for being connected with the rectification output power supply on the aluminum substrate, the output interface on the PCB comprises a power signal interface or a signal interface with a duty ratio, the power signal interface is used for outputting a power signal, and the signal interface with the duty ratio is used for outputting a signal with the duty ratio.
As a preferred embodiment, the connector of the present utility model further comprises an input interface on the aluminum substrate;
the input interface on the aluminum substrate comprises an external power interface for connecting an external alternating current power supply,
the input interface on the aluminum substrate further comprises a signal interface or a power supply signal interface with a duty ratio, wherein the signal interface with the duty ratio is used for inputting signals with the duty ratio, and the power supply signal interface is used for inputting power supply signals.
The utility model can adopt but not limited to a bonding pad or a needle seat and other connection modes to realize the signal connection of the PCB and the aluminum substrate.
As a preferred embodiment, the connector of the present utility model employs a connector having two separate portions to achieve electrical connection.
As a preferred embodiment, the connector of the present utility model employs a pad, a hub, a plug male and female, or the like.
In a second aspect, the present utility model provides an LED product comprising the above constant current driving source of the present utility model.
In a third aspect, the present utility model provides a linear LED product comprising the above constant current driving source of the present utility model.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the LED constant current driving source provided by the utility model is realized by adopting an aluminum substrate and PCB board mode, the power supply generating electromagnetic interference is integrated into a single PCB unit in a modularization way, the controlled light source or lamp of the LED is placed on the aluminum substrate, and the aluminum substrate serving as a carrier is connected with the PCB board through a connector signal, so that the influence of electromagnetic interference and the like generated by the power supply of intelligent driving on the performance of the device is avoided, the performance of the device is improved, and the requirements of relevant performance standards are met.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
fig. 1 is a schematic block diagram of a constant current drive source according to an example one of the present utility model;
fig. 2 is a schematic diagram of a constant current drive source circuit according to an example one of the present utility model;
fig. 3 is a schematic diagram of a PCB circuit according to an example one of the present utility model;
fig. 4 is a schematic diagram of a PCB board interface according to an example one of the present utility model;
FIG. 5 is a schematic diagram of an aluminum substrate circuit in accordance with an exemplary first aspect of the present utility model; wherein, thick black lines represent an insulating layer of the aluminum substrate, and PE is the ground;
FIG. 6 is a schematic diagram of an aluminum substrate interface according to an example one of the present utility model;
fig. 7 is a schematic block diagram of a constant current drive source according to example two of the present utility model.
Detailed Description
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present utility model indicate the presence of inventive functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the utility model, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the utility model, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B or may include both a and B.
Expressions (such as "first", "second", etc.) used in the various embodiments of the utility model may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present utility model.
It should be noted that: if it is described to "connect" one component element to another component element, a first component element may be directly connected to a second component element, and a third component element may be "connected" between the first and second component elements. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the utility model. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the utility model belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the utility model.
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Examples:
in order to ensure that the performance requirement of the linear driving source in the intelligent LED driving mode reaches relevant standards, the embodiment provides an LED constant current driving source, and the LED constant current driving source provided by the embodiment adopts a mode of combining a PCB (printed Circuit Board) and an aluminum substrate to realize the LED linear driving source, and the basic principle is as follows: the intelligent driving power supply is integrated into a single PCB unit in a modularization way, and the interference generated by the driving chip of the module is subjected to EMC pretreatment on the module: cutting off a propagation path of an interference source by using a bottom copper foil of the PCB and an EMC device; in the conventional DOB operation mode of attaching to the aluminum substrate, the interference source can not cut off the interference path all the time by using the parasitic capacitance effect of the aluminum substrate, so that the EMC test cannot meet the related performance requirements.
The LED constant current driving source proposed in the present embodiment includes:
the intelligent controller, the power supply, the controlled light source and the connector;
wherein, the power supply is integrated on a single PCB board;
the controlled light source is integrated on the aluminum substrate;
the intelligent controller is integrated on the PCB or the aluminum substrate;
the PCB board is connected with the aluminum substrate through the connector.
The PCB board of the present embodiment is used for integrating an intelligent driving power supply, which is used for generating a power signal to supply power to an intelligent controller under the driving of an external power supply, driving the intelligent controller to generate an intelligent PWM signal, a switching power signal or a driving/controlling signal with a duty ratio, and providing the signal to a controlled light source on an aluminum substrate to control the on/off of the controlled light source.
As shown in fig. 1 and 2, when the intelligent controller is integrated on the aluminum substrate, the power supply on the PCB board generates power signals (i.e., VDD and GNDA) under the driving of the pulsating dc power supply rectified by the aluminum substrate, and transmits the power signals to the intelligent controller on the aluminum substrate through the power signal interface to drive the intelligent controller to output PWM signals, which control the controlled light source on the aluminum substrate.
An alternative implementation mode is that the PCB (namely the module PCB-A) can adopt FR4 or other insulating materials as ase:Sub>A substrate, the top layer of the substrate is ase:Sub>A power driver (namely ase:Sub>A power supply, only the power supply is integrated on the PCB at the moment) or an element wiring layer with ase:Sub>A PWM signal output device (the power supply and an intelligent controller are integrated on the PCB at the moment), and the bottom layer of the substrate is ase:Sub>A ground wire copper foil layer for shielding; meanwhile, the PCB board is reserved with a corresponding input interface and an output interface, and the interfaces can adopt, but are not limited to, a bonding pad or a needle seat or other connectors with 2 separated parts for electric connection. As shown in fig. 3 and 4, when the intelligent controller is integrated on an aluminum substrate, the PCB board uses a constant voltage step-down IC (U1), such as BP2525; after the rectified direct current is filtered by electrolytic capacitors (C1 and C2) and an inductor (L1), the direct current is input into a constant voltage step-down IC (U1), and the current of a switching signal is oscillated by the constant voltage step-down IC, and the output inductor and an output capacitor (Cout) form a BUCK constant voltage circuit, so that a stable direct current VDD voltage is generated on the output capacitor (Cout) for an intelligent controller on an aluminum substrate. The PCB comprises an external power input interface for connecting a rectification output power supply on an aluminum substrate, wherein the input interface is as follows: + or DCBUS is connected with a voltage anode of an alternating current power supply on the aluminum substrate after rectification, and is input into an interface: -or GND is connected to the voltage negative rectified by the ac power supply on the aluminium substrate; the PCB further comprises an output interface for outputting a power signal for driving the intelligent controller, wherein the output interface is used for: VDD is used as the positive electrode of the output power supply of the PCB board, and the output interface: GNDA is used as the negative electrode of the output power supply of the PCB.
The aluminum substrate part of the embodiment is a controlled light source or a lamp composed of LED beads or LEDs and drivers, and the controlled light source or the lamp is driven by an external power supply and signals output by a PCB.
In an alternative embodiment, when the intelligent controller is integrated on an aluminum substrate, the aluminum substrate (i.e., the module PCB-B) mainly includes a rectifier bridge, a linear driving IC (e.g., PT1909 with a controlled port, etc.), the intelligent controller and an LED group, as shown in fig. 5 and 6, the rectifier bridge converts an external ac power source into a pulsating dc signal, the output (DCBUS and GND) of the rectifier bridge supplies power to the LED group and connects with the input interface of the PCB, the power supply interface of the intelligent controller connects with the output interface (VDD and GNDA) of the PCB, and the intelligent controller is driven to output a PWM signal for controlling the output signal of the linear driving IC to control the switching of the LED group. The aluminum substrate comprises an input interface, an output interface and an input interface, wherein the input interface is used for being connected with an external alternating current power supply and the output interface of the PCB. Wherein, the input interface: l is a live wire, and an input interface is as follows: n is zero line; an input interface: VDD refers to the positive electrode of the input power supply of the intelligent control module, GNDA refers to the negative electrode of the input power supply of the intelligent control module, and the input interface is as follows: the RF/WIFI/BL refers to a received signal with related functions of the intelligent controller, and the intelligent controller comprises a module with a dimming and toning function, such as a sign polar light megabit BL-M5 and SM-M5, which is provided with a signal processing and outputting signal; anxin TB-03F, etc.; output interface: + or DCBUS refers to the voltage positive electrode after rectification of the alternating current power supply, and the output interface is as follows: -or GND refers to the negative voltage pole of the ac power supply after rectification.
The aluminum substrate is used as a carrier, and the relevant input interface and the output interface can be integrated together, and the interfaces can be, but are not limited to, connectors such as bonding pads or needle bases.
As shown in fig. 2, the PCB board and the aluminum substrate are connected together to form a whole, so as to form the LED constant current driving source, where the connection manner of this embodiment may use a connector having two separate parts, such as a pad, a hub, an inserting male and female, and SMD welding, to implement electrical connection. For example, the interfaces on the PCB board can be integrated together to form pins, the interfaces on the aluminum substrate can be integrated together to form row bus bars, and the pins and the row bus bars are spliced together so as to realize the electrical connection of the PCB board and the aluminum substrate.
According to the embodiment, the driving circuit of the FR4 or other single-layer or multi-layer plate integrated high-frequency switch signals or other circuits with electromagnetic interference are modularized and then combined with the aluminum substrate through the bonding pad, the needle seat or other connection modes to form the LED constant-current driving source, so that the performance of the LED constant-current driving source meets the related performance requirements.
It should be noted that fig. 1 to 6 only show the case that the intelligent controller is integrated on the aluminum substrate, which is only an exemplary illustration and not a limitation, and in another alternative embodiment, the intelligent controller and the power supply are both integrated on the PCB board, and then the power supply generates a power signal under the driving of the pulsating dc power source rectified by the aluminum substrate to supply power to the intelligent controller, so as to drive the intelligent controller to output a PWM signal, and the PWM signal is transmitted to the controlled light source on the aluminum substrate through the signal interface with the duty ratio on the PCB board to control the controlled light source, as shown in fig. 7. When the intelligent controller and the power supply are integrated on the PCB, the circuit principles of the power supply and the controlled light source are consistent with those described in fig. 1-6, and are not repeated herein, and the difference between the intelligent controller and the power supply is that the signal output interface on the PCB is a signal interface with a duty ratio, for outputting a signal with a duty ratio, such as a PWM signal; and the input interface on the aluminum substrate comprises a signal interface with a duty ratio and is used for receiving signals with the duty ratio transmitted by the PCB.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The LED constant-current driving source is characterized by comprising a power supply, an intelligent controller and a controlled light source; the power supply is integrated on the PCB, and the controlled light source is integrated on the aluminum substrate;
the intelligent controller is integrated on the PCB or the aluminum substrate;
the PCB is electrically connected with the aluminum substrate through a connector;
the power supply generates a power supply signal to drive the intelligent controller to output a signal with a duty ratio to control the controlled light source to be turned on/off.
2. The LED constant current driving source according to claim 1, wherein the PCB board comprises a substrate;
the top layer of the substrate is a power supply or an element wiring layer with a signal output device with a duty ratio;
the bottom layer of the substrate is a ground wire copper foil layer, and has a shielding effect.
3. The LED constant current driving source according to claim 2, wherein the substrate is FR4 or a substrate made of an insulating material.
4. The LED constant current driving source according to claim 1, wherein the aluminum substrate is further integrated with a rectifier bridge; the controlled light source comprises a linear drive IC and an LED group;
the rectifier bridge converts an external alternating current power supply into a pulsating direct current power supply, and the pulsating direct current power supply output by the rectifier bridge supplies power for the LED group and power for a power supply on the PCB;
the intelligent controller outputs PWM signals under the drive of power supply signals output by the power supply;
the linear driving IC controls on/off of the LED group under the PWM signal driving.
5. The LED constant current driving source according to any one of claims 1 to 4, wherein the connector comprises an input interface and an output interface on a PCB board;
the input interface on the PCB comprises an external power interface and is used for being connected with the rectification output power supply on the aluminum substrate, the output interface on the PCB comprises a power signal interface or a signal interface with a duty ratio, the power signal interface is used for outputting a power signal, and the signal interface with the duty ratio is used for outputting a signal with the duty ratio.
6. The LED constant current driving source according to claim 5, wherein the connector further comprises an input interface on an aluminum substrate;
the input interface on the aluminum substrate comprises an external power interface for connecting an external alternating current power supply,
the input interface on the aluminum substrate further comprises a signal interface or a power supply signal interface with a duty ratio, wherein the signal interface with the duty ratio is used for inputting signals with the duty ratio, and the power supply signal interface is used for inputting power supply signals.
7. The LED constant current driving source according to claim 6, wherein the connector employs a connector having two separate portions to achieve electrical connection.
8. The LED constant current driving source according to claim 7, wherein the connector is a pad, a hub or a socket male and female.
9. An LED product comprising the constant current drive source according to any one of claims 1 to 8.
10. A linear LED product comprising the constant current drive source according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320534497.XU CN219659954U (en) | 2023-03-17 | 2023-03-17 | LED product and constant current driving source thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320534497.XU CN219659954U (en) | 2023-03-17 | 2023-03-17 | LED product and constant current driving source thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659954U true CN219659954U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320534497.XU Active CN219659954U (en) | 2023-03-17 | 2023-03-17 | LED product and constant current driving source thereof |
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| CN (1) | CN219659954U (en) |
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- 2023-03-17 CN CN202320534497.XU patent/CN219659954U/en active Active
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