A universal load-adjustable universal lamp panel for LED lamp power supply

Abstract

This utility model relates to a universal adjustable load LED power supply board, comprising a fuse (FUSE), resistor combinations R1, R2...Rn controlled by a constant voltage / constant current mode switch (SWR), an LED array, and voltage regulating switches SW1, SW2...SWm controlling the number of LEDs connected in series in the LED array; the fuse is connected in series between the input terminal and the LED array. This utility model can visually screen for flickering, jitter, and other defects caused by power supply aging, and can meet the load requirements of different driver power supply models through the adjustable switch buttons on the universal light board. It efficiently meets the aging requirements of different power supply models and saves the time and cost of repeatedly manufacturing LED strips due to load incompatibility caused by changing the power supply model, making it highly practical.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a universal lamp board with adjustable load for LED lighting power supplies. Background Technology

[0002] With the increasing popularity of LED lighting fixtures, LED driver power supplies are a crucial component. Before shipping, power supply manufacturers conduct batch (100 units or more at a time) full-power load aging tests on LED driver power supplies for 1-8 hours to screen for defective products caused by soldering processes and component quality issues. Currently, there are two main methods for this aging load test:

[0003] Electronic loads: Electronic load testers are bulky and expensive. Simple electronic loads are often used in aging production lines, but they cannot intuitively identify problems such as flickering and jittering when the driver power supply is carrying LED lighting loads.

[0004] LED strip (board) loads: While they can overcome the shortcomings of electronic loads, there are many power supply models, each requiring different series and parallel ratios and power ratings for the LED load strips (boards). This results in high costs for LED load strips, and changing the power supply model necessitates replacing the load strips simultaneously, consuming significant time, effort, and money.

[0005] Therefore, there is an urgent need for a universal lamp board with adjustable load that can intuitively identify malfunctions and adapt to different power supply models. Utility Model Content

[0006] This invention proposes a universal adjustable load power supply board for LED lamps to solve the problems mentioned in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A universal adjustable load power supply board for LED lamps includes a fuse (FUSE), a resistor combination R1, R2...Rn controlled by a constant voltage / constant current mode switch (SWR), an LED combination matrix, and voltage regulating switches SW1, SW2...SWm that control the number of LED loads connected in series in the LED combination matrix. The fuse is connected in series between the input terminal and the LED combination matrix. The resistor combination R1, R2...Rn is connected in parallel with the constant voltage / constant current mode switch (SWR) and then connected in series with the LED combination matrix. The LED combination matrix is ​​composed of multiple LED units connected in series. Each LED unit consists of multiple LED beads connected in parallel, and each LED unit is equipped with a corresponding voltage regulating switch SW1, SW2...SWm. The voltage regulating switches SW1, SW2...SWm are used to control whether the corresponding LED unit is short-circuited to the LED terminal.

[0009] As a further technical solution of this utility model: the lamp board adopts a single-sided aluminum substrate design.

[0010] As a further technical solution of this utility model: a screw post is installed at each of the four corners of the lamp panel.

[0011] As a further technical solution of this utility model: multiple lamp boards can be connected in series to expand the load voltage range, or connected in parallel to expand the load current range.

[0012] As a further technical solution of this utility model: the rated voltage of a single LED bead is 3V, 6V or 9V.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] This invention can not only visually identify defects such as flickering and jittering caused by power supply aging, but also meet the load requirements of different driver power supply models through the adjustable switch button of the universal light board. It can efficiently meet the aging needs of different power supply models, and save the time and cost of repeatedly manufacturing light strips due to load incompatibility caused by changing the power supply model, which is very practical. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figure 1 The drawings shown illustrate that this utility model is a universal adjustable load universal lamp board for LED lighting power supplies, and a universal adjustable universal lamp board testing device for batch aging and R&D testing of LED lighting power supplies. It is compatible with a wide voltage range and a wide current and power range, and can switch between constant voltage and constant current working modes. It is suitable for R&D loads and batch production aging loads of LED driver power supplies.

[0021] The technical solution of this utility model consists of a fuse, a resistor combination controlled by a constant voltage / constant current mode switching switch, a voltage regulating switch for the number of LED loads connected in series, and an LED combination matrix. Based on the load voltage and current required by the LED lighting power supply, a large-scale LED array is combined in a controllable series-parallel manner by flexibly setting the switches. This allows the LED load to switch quickly between different voltage ranges and current power levels, meeting the different aging load requirements of different models of LED lighting power supplies.

[0022] Meanwhile, the PCB of this device example is based on a single-sided aluminum substrate design, which has good thermal conductivity and a large heat dissipation area, and can meet the stability requirements of long-term testing. A screw post is installed at each of the four corners to prevent the universal load LED chips from being impacted. In actual use, to avoid glare, when the LEDs are used upside down, the post prevents the LED chips from being damaged by heat due to insufficient light dissipation when they are too close to the table.

[0023] Furthermore, each of the multiple LED universal load boards can use LEDs with different color temperatures. Multiple LED universal load boards can be connected in series to expand the load voltage range or connected in parallel to expand the load current range, which can meet the production aging and R&D testing needs of all types of LED lighting power supplies.

[0024] In summary, this technical solution utilizes the flexible combination of series and parallel LED matrix units to provide a universal lamp board testing device with adjustable load for power supply aging, suitable for a wide range of LED driver power supply manufacturers. It is compatible with a wide voltage and power range, and efficiently, flexibly, and cost-effectively solves the problems of R&D load and mass production aging load for different types of LED driver power supplies.

[0025] The working principle is as follows:

[0026] 1) Connect LED+ and LED- to the positive and negative terminals of the LED driver power supply respectively. The input terminals are protected by a fuse (FUSE) for overcurrent protection.

[0027] 2) The constant voltage or constant current load mode is switched by controlling the connection and disconnection of resistors R1, R2...Rn via the SWR switch. When the SWR is closed and the control resistors are not connected, the entire device is a pure LED load, commonly used for constant current output power loads. When the SWR is open and the control resistors are connected, the entire device is a load consisting of LEDs and resistors R1, R2...Rn, with the resistors acting as voltage dividers and current limiters, suitable for constant voltage output power loads. Simultaneously, the addition of resistors can adjust the voltage at intermediate ranges for the number of LEDs in series.

[0028] 3) When using LED beads with a rated voltage of uV and a rated current of iA, D11, D12...D1n are connected in parallel as a group of LED combination units with a rated voltage of 1*uV and a rated current of n*iA. Whether this unit is short-circuited to the LED terminal is determined by whether SW1 is closed. When SW1 is closed, the load capacity of the universal load lamp board device is the rated voltage of 1*uV and the rated current of n*iA.

[0029] 4) Similarly, D21, D22...D2n form the second group controlled by switch SW2, D31, D32...D3n form the third group controlled by switch SW3, and so on, with Dm1, Dm2...Dmn forming the m-th group controlled by switch SWm. Each group of units is connected in series, resulting in an LED load of m series and n parallel. At this point, the maximum load capacity of the universal load lamp board device is the rated voltage m*uV and the rated current n*iA.

[0030] 5) Implementation of a universal adjustable load: By opening switches SW1, SW2, ..., SWm-1 and closing SWm, the maximum load capacity of the universal load lamp panel is the rated voltage m*uV and the rated current n*iA. By opening switches SW1, SW2, ..., SWm-2 and closing SWm-1 and SWm, the maximum load capacity of the universal load lamp panel is the rated voltage (m-1)*uV and the rated current n*iA. Furthermore, by controlling the appropriate resistor values ​​R1, R2, ..., Rn with SWR, the load voltage can be adjusted to 0.5*uV with a resistor connection. Thus, by controlling switches SW1, SW2, ..., SWm and SWR, a wide range of load voltage adjustment from 0.5*uV to (m+0.5)*uV and a wide rated current range of 0-n*iA can be achieved for the universal lamp panel load effect.

[0031] 6) Furthermore, multiple LED universal load boards can be connected in series to expand the load voltage range or multiple boards can be connected in parallel to expand the load current range, which can meet the production aging and R&D testing needs of all types of LED lighting power supplies.

[0032] This utility model device provides an example: A single LED bead has rated parameters of 3V 150mA 0.5W (not limited to 6V or 9V, etc.). Each group of LED beads consists of 8 beads, each group having a load capacity of 3V 1.2A 4W. A total of 24 such units are connected in series, which can achieve a maximum load capacity of 72V 1.2A 96W. The resistor value is selected from a group of 8 2512 10Ω resistors forming a 1.25Ω resistor combination. When a current of 1.2A flows through, the voltage across this resistor combination is 1.5V. Thus, by controlling switches SW1, SW2, ... SWm and SWR, the rated voltage of 1.5V, 3*1+1.5V, 3*2+1.5V...3*24+1.5V (i.e., 1.5-73.5V) can be adjusted, and a universal light board load effect with a wide rated current of 0-1.2A can be achieved. Multiple such LED universal load boards can be connected in series to expand the range of loadable voltages, or multiple boards can be connected in parallel to expand the range of loadable currents.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A universal adjustable load power supply board for LED lamps, characterized in that, The system includes a fuse (FUSE), resistor combinations R1, R2...Rn controlled by a constant voltage / constant current mode switch (SWR), an LED combination matrix, and voltage regulating switches SW1, SW2...SWm that control the number of LED loads connected in series in the LED combination matrix. The fuse is connected in series between the input terminal and the LED combination matrix. The resistor combinations R1, R2...Rn are connected in parallel with the constant voltage / constant current mode switch (SWR) and then connected in series with the LED combination matrix. The LED combination matrix is ​​composed of multiple LED units connected in series. Each LED unit consists of multiple LED beads connected in parallel, and each LED unit corresponds to a voltage regulating switch SW1, SW2...SWm. The voltage regulating switches SW1, SW2...SWm are used to control whether the corresponding LED unit is short-circuited to the LED terminal.

2. The universal lamp panel according to claim 1, characterized in that, The light panel adopts a single-sided aluminum substrate design.

3. The universal lamp panel according to claim 1, characterized in that, A screw post is installed at each of the four corners of the lamp panel.

4. The universal lamp panel according to claim 1, characterized in that, Multiple lamp panels can be connected in series to extend the load voltage range or in parallel to extend the load current range.

5. The universal lamp panel according to claim 1, characterized in that, The rated voltage of a single LED bead is 3V, 6V or 9V.

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