What are the main models of SMD LEDs?

SMD LED means surface mount light-emitting diode. SMD patches help improve production efficiency and apply in different facilities. It is a solid-state semiconductor device that can directly convert electricity into light.

Introduction

SMD LED means surface mount light-emitting diode. SMD patches help improve production efficiency.

and different facility applications. It is a solid-state semiconductor device that can directly convert electricity into light. Its voltage is 1.9-3.2V, with red light and yellow light having the lowest voltage. The heart of the LED is a semiconductor chip. One end of the chip is attached to a bracket, one end is the negative electrode, and the other end is connected to the positive electrode of the power supply, so that the entire chip is Encapsulated with epoxy resin. The semiconductor wafer is composed of two parts. One part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor, where electrons are mainly present. But when these two semiconductors are connected, a P-N junction is formed between them. When an electric current acts on this chip through a wire, electrons will be pushed to the P region, where they will recombine with holes, and then energy will be emitted in the form of photons. This is the principle of LED luminescence. The wavelength of light, that is, the color of light, is determined by the material forming the P-N junction.

Main Model

SMD LED 3528

3528 SMD lamp beads, power 0.06w, lumen value 6-7LM, 7-8LM, 8-9LM, the maximum luminous efficiency can reach 150LM/w.

SMD LED 2835

2835 SMD lamp beads, power 0.2w, lumen value 20-22LM, 22-24LM, 24-26LM, the maximum luminous efficiency can reach 130LM/w.

SMD LED 5050

5050 SMD lamp beads, power 0.2w, lumen value 20-22LM, 22-24LM, 24-26LM, the maximum luminous efficiency can reach 130LM/w.

SMD LED 5630

5630 SMD lamp beads, power 0.5w, lumen value 50-55LM, 55-60LM, the maximum luminous efficiency can reach 130LM/w.

SMD LED 3014

3014 SMD lamp beads, power 0.1w, lumen value 11-12LM, 12-13LM, the maximum luminous efficiency can reach 130LM/w.

Compare

First, let's understand the concepts of LED and SMD.

LED (Light Emitting Diode) is a light-emitting diode. There are many types, one of which is SMD LED. Others include direct plug-in LED, piranha, high-power LED, etc. LEDs packaged in SMD format are divided into several types such as CHIP, TOP, SIDEVIEW, etc.

Classification

Commonly used LEDs are divided into four types: plug-in LED, TOPLED, piranha and high-power.

1) Direct plug-in LED:

The electrical connection takes the form of 2-pin direct plug-in, which is a traditional, low-end product. Because the thermal resistance of the package is large, it is difficult for the chip to dissipate heat, so the light effect decays quickly and the lifespan is short. The advantage is that it is cheap and can be made into a small light angle.

2) TOPLED:

The electrical connection takes the form of a 2, 4 or 6-pin patch, which is currently a commonly used light source. According to the size of the package appearance, it is divided into specifications such as 0805, 1206, 3528, 3535, 5050, 5060, etc. The larger the package appearance, the better the heat dissipation performance, the greater the power it can withstand, and the more light energy it can output.

3) Piranha:

It is a 4-pin direct plug-in package. Its heat dissipation performance and reliability are better than the ordinary 2-pin plug-in type. It can withstand an operating current of 50~70mA and is currently a commonly used light source.

4) High power LED:

LEDs designed and produced using large-size chips and enhanced thermal channel technology are usually divided into specifications such as 0.5W, 1W, 3W and 5W. A single 1W LED can withstand an operating current of more than 300mA and output a luminous flux of more than 100 lumens. It is widely used in civil and commercial lighting, transportation Control, photography, night vision and other fields. The price of high-power LED is still relatively high. As the technology gradually matures, it will hopefully completely replace traditional lighting sources and lead the world into an era of solid light sources.