What is the LED voltage?
What is the LED voltage?
This is a problem that many people will consider when choosing lamp beads
After all, the following voltage, current and circuit design, as well as the choice of driving power, are closely related to him.
Voltage drop range for white LED light-emitting diodes: 2.8-.3.5 v
Red LED light-emitting diode voltage voltage drop range: 1.8-2.4 v
Yellow LED voltage drop range: 1.8-2.4 v
Emerald green LED voltage drop range: 2.8-3.4 v
Blue LED light-emitting diode voltage voltage drop range: 2.8-3.4
Of course, it should be noted here that the power of the LED light-emitting diode is related to the current and the current of the LED single chip is constant -20mA
Red, yellow and orange chips are all between 1.8-2.3V, and the rest of the colors are between 2.8-3.6V
In addition, how many volts does the specific LED light up?
The voltage range value of the LED lamp bead is used to select the appropriate driving power; we can look at the LED lamp bead according to the power
0.06w, the power supply is 2.6-3.5 and the current is 20MA
0.5w, the power supply is 2.65-3.77 and the current is 150MA
1w, the power supply is 2.79-3.9v and the current is 350MA
3w, the power supply is 3.0-4.5v and the current is 700MA
5w, the power supply is 3.2-4.9v and the current is 1000MA
The above is the common voltage of LED packaged light-emitting diodes in the LED lamp bead industry. Although there are some white high-voltage lamp beads, such as 6V, 9V, and 18V, they are all for special purposes, such as which products are used for high-voltage lamp belts.
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LED voltage?,LED lamp bead
There are many welding methods for LED lamp beads on the chip, and the following is one of the commonly used methods for reference. First, use an electric soldering iron to heat some soldering tin on the positive and negative electrode pads of the lamp bead (the soldering tin must not be too much, otherwise, the positive and negative electrode pads will be connected once heated with a hot-air gun), then use a hot-air gun to heat the positive and negative electrode pads at the same time, after the tin melts, use tweezers to place the positive and negative electrodes of the lamp bead on the corresponding pad.
LED is the light emitting diode, which is a semiconductor solid light emitting device that converts electric energy into light energy. Its core is the PN junction. In addition to the forward conduction, reverse cut-off and breakdown characteristics of the general PN junction, it also has the light emitting characteristics under certain conditions. Its structure mainly includes the following parts: lead, bracket, encapsulation glue, bonding wire, LED chip, solid crystal glue and phosphor. The discoloration failure of LED lamp bead is closely related to its material, structure, packaging process and service conditions. The following will analyze the causes of its discoloration through specific cases.
LED lamp beads are also called light emitting diodes. It has a wide range of applications. Its luminous colors include red light, emerald green light, yellow green light, yellow light, purple light, blue light, white light and orange light. The above is monochromatic light. It can also be made into two or three colors.
The gold wire used to package LED lamp beads contains more than 99.99% gold. It is produced by drawing gold from this material. In addition to 99.99% gold, this gold also contains less than 1% other trace elements. One of the core components of LED lamp bead packaging is gold wire, which is the bridge connecting the luminous chip and the welding point, and plays a decisive role in the service life of LED lamp bead. So how to identify the purity of gold thread?