DIY LED Driver Board TV Backlight Drive Module For 26-55 Inch LED TVs

Description

Features:
1. Universal LED LCD TV backlight constant current board.
2. Voltage adaptive adjustment.
3. Support 26 inch to 55 inch LCD TV backlight board.
4. 200mA default output current. The 10MA-1000MA current can be adjusted as needed.
5. Suitable for professional level player DIY customization.
6. This board is not suitable for backlights below 60V.
Specification:
Color: green
Uses: for 26-55 inch LED TVs and monitors
Input voltage range: 10-26V
Output voltage range: 65-165V
Output current: 10-1000MA adjustable
Size: Approx. 9 x 5.8 x 1 cm / 3.5 x 2.3 x 0.4in
Weight: approx. 50g
Package list:
1 x Driver Board
Precautions:
The operating voltage of the light bar must be any voltage between 65V and 210. Can't be lower than 65V, if it is lower than 65V, you can choose to buy other products in our store. Can not be higher than 210V, the design limit working voltage condition of this product shall not be higher than 210V. If this voltage is exceeded, the screen may be dark or the lamp may flicker. This product only has constant current, no constant voltage, and the voltage will be automatically adjusted to the corresponding voltage according to the required voltage of the light bar, so you do not need to entangle the voltage measured at no load.
In view of the fact that many buyers are bought and modified, and the parameters of the machine that needs to be modified are unknown, it is hereby declared that the quality and performance of the products sold in this shop are absolutely no problem, but it is absolutely impossible to guarantee that the goods purchased will be certain. The fact that it can be successfully lit. There are many reasons why it can't match, voltage, power, connections, structures, etc. can cause mismatches.
General parameters: 65V-210V 200MA 24VIN
Correctly illuminate problems that may be encountered:
1. The brightness is not enough, the screen is obviously darker than the original board. At this time, we start from two aspects. First, after connecting the dimming foot, try to adjust the brightness with the remote control. If it can't be solved, test the actual. The voltage of the pin, (Note: my product has the highest brightness at 0V, and the brightness is the darkest when the voltage is high.) If the voltage range of the analog voltage mode is between 0V-5V or 0V-3.3V, if the voltage is always high The voltage cannot be reduced and should be adjusted. If it is a PWM signal, the voltage is stable at 3.3V. At this time, if the light is adjusted to the brightest or the requirement is not met, the second scheme must be implemented. Second, adjust the resistance on the board to increase the current to meet the requirements.
In view of the fact that many buyers do not understand the topology of the LED driver board, the lack of understanding of its working principle directly leads to the consequences of not being able to use it correctly! Hereby, our company briefly introduces the current popular topology solutions. There are three main types of topologies: boost, buck, boost-buck.
1. The boost topology means a boost type. Interpretation: The constant current plate using such a scheme requires the load voltage (Vout) to be higher than the power input voltage (Vin), and the ratio is greater than 1:1.5, that is, if the input voltage is 12V, the voltage of the LED string must be At 18V or above, the LED booster board can work normally. If the voltage of the LED string is slightly higher than VIN or lower than VIN, the LED will be on when the device is powered on, and the driver board switch, dimming, etc. cannot be used. The consequences of control. 2. The advantage of the Boost scheme is that the structure is simple and the efficiency is high. The disadvantage is that the boost ratio is limited, and the optimum boost ratio is generally 2-4 times. When the frequency exceeds 6 times, the switching loss increases sharply, the temperature of the switching device rises sharply, and the stability of the system deteriorates.
2. Buck topology means step-down type. Interpretation: The constant current plate using such a scheme requires the load voltage (Vout) to be lower than the power supply input voltage (VIN), that is, if the input voltage is 12V, the voltage of the light bar is lower than 12V, which is 24VIN. It is lower than 24V, and if the voltage of the LED strip is higher than VIN, it cannot be driven to light. The Buck scheme has the advantages of simple structure and slightly higher efficiency than the Boost scheme. The disadvantage is that only a small number of series LEDs are required, and when the power is large, the number of parallel groups is too large, which is unfavorable for the compact LED backlight module PCB routing.
3. The Boost-buck topology means a boost-buck type. Interpretation: This type of program has both up-and-down functions. It works in both modes of operation. But the disadvantage is that the efficiency is low, not suitable for large power applications.
The most widely used in the industry is the Boost solution, followed by Buck and boost-buck.
The working principle of the above common LED driver board solutions is presented to everyone. I hope that you can understand the problems when you use them to complete the work better and more accurately.
Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.
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On Sep 20, 2022 at 20:07:13 PDT, seller added the following information: