What are the common problems with SMD LED lamp beads?
Common problems caused by abnormal power supply:
a. Check whether the power supply is working properly and the indicator light is on. If it is not on, check whether the power supply is connected.
b. Check whether the power cord of the lamp be connected to the positive and negative poles of the power supply. Is there any phase reversal? If the above problem exists, please connect it correctly.
LED lamp beads for voltage requirements:
Nominal 3V LED lamp beads, in fact, different colors of the current have different requirements, yellow requires the minimum current, followed by red, green, white and blue. Excessive current will burn the wick. Using a 2.4V rechargeable battery, ** burns easily, because even if the voltage is not high, the current is too high and it will still scorch at will.
No power detection LED:
In the absence of power, if you want to choose the convenience at the time of purchase, it is recommended to prepare a 3V button battery. When selecting the battery, you can easily check the LED light.
High-power led lamp burns out:
01, upper and lower two filaments, our industry is called the gold wire, pure gold, used for conducting, two positive poles, two negative poles, the real good product will have a fifth wire, welded on the Zener tube, from Protective effect.
02. As the filament becomes shorter, it is already very clear to tell you that this lamp has been burned by a large current, which is equivalent to a broken circuit.
03, high-power 1W drive current is about 350ma, the working voltage is between 3.2-3.6V, please pay attention when using, excessive current will burn the lamp.
04, generally three 1W lamp aluminum substrate is driven around 12V, rarely used directly on the 220V, you see is not a constant current source or less a 12V drive power?
LED lamp yellow reason? The reason for the yellowing of the LED sealant is mostly due to the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the sealant baking time is too long.
Causes of LED lamp leakage: Improper electrostatic protection. Then, during the packaging process, the PAD of the bonding wire is misaligned. Finally, the quality of the chip itself is a hidden problem.
LED lamp beads should be capacitive and inductive load issues: In fact, neither is, LED lamp beads is a diode, it requires a positive turn-on voltage can work, usually 2-3.5V, in addition, current The size can control the brightness of the LED lamp beads. In other words, LED lamp beads only convert electrical energy into light energy.
The reason for the large decline in the brightness of LED lamps: The attenuation of low-power LEDs has four reasons: First, the iron bracket has poor thermal conductivity. Two: epoxy yellow. Three: The chip is not in close contact with the bracket. Four: The chip decays greatly. If it is white light, there is a problem of phosphor degradation.
The above lamp beads common problem, Shenzhen Yu Liang Optoelectronics is a specialized design and production of LED LED lamp beads manufacturers. With "scientific management, excellence, and customer trust" as the company's quality policy, we have continuously researched and developed LED products that meet the needs of our customers. The company strictly operates in accordance with ISO9001-2008 quality management system, and makes good use of ERP management system. It wins customer trust and creates value for customers with the business philosophy of "same quality, lowest price, same price, best quality".
