Generally speaking, the LED lamp bead is actually a light-emitting diode, which will emit light after being loaded with a certain voltage and current. Generally speaking, the voltage of a single LED chip is about 3V and the current is 30mA. For the voltage and current of the LED lamp bead, most of the LED lamp bead packaging process, the series-parallel relationship of the LED lamp bead packaging chip is determined. Below is a detailed explanation of GMKJ LED for everyone!
The most used 0.2W LED lamp bead in the lamp tube is composed of two LED chips in parallel, namely 3V, 60MA. As for the high-voltage LED 9V lamp beads that are most used for the resistance-capacitance power supply, it is composed of three LED chips in series, namely 9V, 30MA.
Because LED lamp beads are made up of multiple LED chips in series and parallel, there are many specifications of LED lamp beads. Shenzhen high-grade LED lamp beads brand GMKJ LED 3030LED lamp beads can produce and supply voltage 3030LED lamp beads. kind. The specific lamp bead's V can also be seen by how many LED chips the lamp bead is composed of. Of course, because the LED chip is relatively small and the wire bonding gold wire is also relatively small, visual inspection can only be approximated. The specifics are still It will be known only after measuring with a DC source.
However, 3V, 6V, 9V, etc. are more commonly used. Of course, there are also tens of V lamp beads. This depends on
The specific design plan determines what kind of lamp beads are used.
For the 3030LED lamp bead with only a small voltage, you can use the diode file of the multimeter to light up the 3030LED lamp bead. This is a positive and negative one. If it is not on, just change the positive and negative. For LED lamp beads with unknown voltage, it can only be measured with a DC source. The method is: adjust the DC source voltage to zero, adjust the current to the maximum, connect the positive and negative poles of the lamp beads, and adjust the voltage of the code current source to make it Starting from zero to increase, when the lamp beads are dimly lit, the voltage at this time is the approximate voltage of the LED lamp beads.
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For COB lamp beads, it is actually a principle, but COB encapsulates more LED chips, the voltage and current will be relatively large. The method of confirming the voltage and current of the COB lamp bead is also to confirm with a DC source.
Using a DC source to confirm this is the simplest and rude method. It is used the most in the development process. When plagiarizing someone else's lamp, this is also the way to confirm the specifications of the lamp beads used by others.
The high-grade LED lamp bead brand GMKJ LED stated that each specification of lamp beads has its own characteristics, some are more cost-effective, and some have better performance. And the LED lamp beads of the same specification between each manufacturer will be different, so there is no absolute quality of 3030LED lamp beads, as long as it is used well, it will play its greatest role.
