LED Light Emitting Diode (LED) is a solid-state semiconductor devices, which can convert electricity directly into to light. LED’s heart is a semiconductor chip, one side of the chip is attached to a stent, the end is negative, the other side connect the positive terminal of the power, and the whole chip is packaged by epoxy resin.
Semiconductor chip consists of two parts, one is P-type semiconductor, the hole is in it dominant, the other part is the N-type semiconductor, in this part is mainly electronics. And a PN junction is formed between them when the two semiconductor connected.
When the current acting on the chip through the wire, electronics will be pushed to P zone, in this areas where electronics recombinated with the hole, then emit energy by the form of photon, which is the principle of LED. The wavelength of the light or the color is determined by the material of PN junction.
LED chip is a core component of LED, referring to the PN junction. Its main functions are: convert the electrical energy into light, the main material is Monocrystalline.
LED chip classification:
By usage: mainly divided into high-power LED chip and low-power LED chip.
By Color: mainly divided into three types: red, green, blue (raw materials for producing white light).
By Shape: generally divided into square pieces and wafer.
By Size: low-power chips are generally divided into 8mil, 9mil, 12mil, 14mil, etc.
How to judge LED chip:
led chip prices: Generally, square chip higher than the wafer, high power led chip higher than the low-power chips.
led chip quality: The evaluation of led chip quality are mainly by the die brightness and light attenuation. In the packaging process are mainly evaluated by the rate of finished product.
What are the differences between LED chips (SMDs)? Which type should I choose?
LED strip lighting can be manufactured using a variety of different LED chip types.
Below, we’re going to explain the main differences between them – by comparing the most commonly used chip types on the LED tape market: the 3528 and the 5050.
What does the number of an LED chip mean?
LED chips (also known as surface mounted diodes or SMDs) are all identified by a four-digit number. This code is less complicated than it looks – it simply indicates the size of the LED chip. For example, the dimensions of SMDs on 5050 LED strip lights are 5.0mm x 5.0mm.
Which is the best LED chip?
LEDs like 3528s, 5050s, 2835s and 5630s aren’t really different types of chip at all – they’re simply different sizes. Each has its own spec: different power requirements and output brightness. The best choice depends on what’s right for your project.
You can find out more about each LED chip below.
The 3528 LED chip explained
Measuring 3.5mm x 2.8mm, the 3528 SMD is a smaller chip than the 5050 LED strip SMD. You will most often find 3528 chips on 12-volt LED strips, drawing 4.8 watts (also known as 4.8w p/m or 5w p/m LED tape) with 60 SMDs per metre.
These strip lights output around 330-360 lumens per metre, depending on colour (equivalent to a 40w halogen) – enough to produce a smooth, bright effect when shining onto any surface.