Who recommended me a LED lamp with better heat dissipation?

Hello, heat dissipation is the most concerned problem in the LED industry, many manufacturers can not solve the problem of LED heat dissipation, so they dare not use too high current, so that the brightness of LED lamp beads can not achieve highlight. Our factory uses Lumins 3014 lamp beads, the chip and 3528 are the same size, and 3528 is different from the bottom of this 3014 to increase the bottom plate metal area, which greatly improves the heat dissipation, the difference between the 3014 package and 3528 is that the two poles of the 3014 chip are not through the gold wire but directly welded on the bracket, the heat conduction is fast, the phosphor is generally used Mitsubishi red powder or Nichia, the light decay is small. Therefore, 3014 uses 30mA current drive, brightness can reach 10-11 lumens, friendly reminder, when purchasing Lumins 3014, we must pay attention to the choice of Taiwan Lumins first-class **, because now there are a lot of imitation 3014 defective products, I am in the West and science and technology to take, they are the total ** of Lumins.

I went to the restaurant yesterday to order food, and I told the waiter, I want something delicious, **cheap, but it hasn't been served yet.

The life of LEDs is about long, and when doing comparative tests, it is necessary to install the same heat dissipation profile for different LEDs. The wafers produced by different manufacturers are mainly a process problem, generally controlling the temperature of the wafer below 100 degrees is better, and then it is higher, the LED light decay is particularly large, but the temperature of the wafer can not be measured, the temperature difference caused by the thermal resistance of the LED wafer to the aluminum substrate is about 20 degrees (1W), and the temperature of the aluminum substrate can be measured. We generally control the temperature of LED aluminum substrate below 60 degrees.

The temperature of the wafer is around 80 degrees.

The main index of the wafer produced by different manufacturers is the luminous flux, and the consumption of the same electric energy, the amount of light that comes out, the more light that comes out, the higher the light efficiency, and the voltage consistency of the chip, the consistency of the band of the light and other parameters, are all related! Good consistency is definitely expensive!

In the market, there are many Chinese brands of led strip lights, and the cost performance is also different. The following are a few cost-effective Chinese brand led strips: Topcon (Topcon):

This is a brand specializing in the production of LED strips, and its product line includes RGB color strips, white strips, etc. The product quality is high and reasonable. Vitwei:

Vitway is an enterprise dedicated to the field of LED lighting, and its product line includes LED tubes, LED strips, etc. Its LED strip light products are of reliable quality and cost-effective. Panier:

Panier is a brand specializing in the production of LED lamps and lanterns, and its product line covers LED strip lighting, LED spotlights, LED chandeliers, etc. The quality of its LED strip light products is relatively high, and it is relatively reasonable. BenQ:

BenQ is a well-known electronic product brand, and its LED strip product line is relatively comprehensive, including ordinary strip light, smart strip light, etc. Its products are of stable quality and cost-effective.

Personally, I think you can consider using thermally conductive silicone or thermal grease.

As electronics continue to integrate more powerful features into smaller components, temperature control has become one of the most critical design challenges in taking away more heat per unit of power in a world of tight architectures and smaller operating spaces.

A simple comparison of thermal grease and soft thermal silicone pads.

1.Thermal conductivity: The thermal conductivity of thermal grease is higher than that of soft thermal conductive silicone pads, which are and.

2.Insulation: Thermal grease has poor insulation due to the addition of metal powder, and the soft thermal conductive silicone pad has good insulation performance. The electrical insulation index of 1mm thickness is above 3000 volts.

3.Form: Thermal grease is condensation paste, and soft thermal conductive silicone pad is sheet.

4.Use: Thermal grease needs to be applied evenly, which is easy to dirt the surrounding devices and cause short circuits; The soft thermally conductive silicone pad can be cut arbitrarily, and the protective film can be peeled off and applied directly, with a small tolerance and clean.

5.Thickness: As a thermally conductive material for filling gaps, thermal grease is limited, and the thickness of soft thermally conductive silicone pads is never equal, and the application range is wide.

6.Thermal conductivity: Thermal grease particles are large and easy to age. The thermal conductivity effect is average; Because of its softness and elasticity, the soft thermal conductive silicone pad can greatly increase the thermal conductivity area between the heating element and the heat sink, and the processing technology is fine and complex, and the product has strong stability and performance.

7.Thermal grease is widely used and is low. Soft thermally conductive silicone pads are mostly used in thin and delicate electronic products such as laptops, and are slightly higher.

Heat dissipation is as simple as that: just one stick!

Thermal grease and soft thermal silicone pads are both thermally conductive materials, and when you choose, my opinion is: what suits you is the best.

Thermal conductivity know-it-all.

Hello, such as the use of high-power LED lights more centralized ventilation is not very good, most of them use fans for heat dissipation, [computer fans], like LED projectors are,

Low calorific value and no material is used in itself.

The common raw materials used in the manufacture and processing of LED heat sinks on the market today are plastics, ceramics, metals and graphene.

The LED heat sink made of plastic and ceramic has advantages in plasticity and cost, although the thermal conductivity and heat dissipation performance is worse than that of other materials, but the LED light heat sink used to make low power can well meet the heat dissipation needs.

Metal is now the most widely used material for the production and processing of LED radiators, among which aluminum alloy is very popular among manufacturers, because aluminum alloy is not only superior in thermal conductivity and heat dissipation, but also has the characteristics of light weight, easy processing and affordability, which is very suitable for making high-power LED light radiators. Chicco radiator solution.

Graphene's latest semiconductor thermal conductive material, super thermal conductivity and heat dissipation performance and ultra-light quality make it a new focus of the LED heat sink industry, but the processing of LED heat sink with graphene requires professional and mature processing capacity, and the highest is higher, so it has not yet been popularized.

Due to the limitations of the current semiconductor light-emitting diode chip technology, the photoelectric conversion efficiency of LED needs to be improved, especially for high-power LEDs, because of their high power, about 60% of the electrical energy will be turned into heat energy release (with the development of semiconductor technology, the photoelectric conversion efficiency will gradually increase), which requires end customers to do a good job of heat dissipation when applying high-power LED products to ensure the normal operation of high-power LED products.

1 Heatsink requirements.

Appearance and material: If the sealing requirements of the finished product are not high, and direct convection can occur with the outside air environment, it is recommended to use aluminum or copper heat sinks with fins.

2 Effective heat dissipation surface area:

For 1W high power LEDs

White light (other colors are basically the same), our company recommends the total effective heat dissipation surface area of the heat sink is 50-60 square centimeters. For 3W products, it is recommended that the total effective heat dissipation surface area of the heat sink is 150 square centimeters, and the higher power of the world cherry blossom is increased according to the situation and the test results, and the heat sink temperature is not more than 60 as much as possible.

3 Connection Method:

In order to strengthen the degree of bonding between the two contact surfaces, it is recommended to coat a layer of thermal grease at the bottom of the LED substrate or on the surface of the heat sink (thermal conductivity of thermal grease, thermal grease requires uniform coating and appropriate amount, and then fixed with screws.

Due to the high heat of LED operation, the most widely used is the Zhigao aluminum alloy radiator with a high coefficient. Including die-cast aluminum radiator, extruded aluminum radiator, stamped aluminum radiator.

Die-casting aluminum radiator is a technology of pressure casting parts, the liquid zinc-copper-aluminum alloy is poured into the inlet of the die-casting machine, and the shape radiator limited by the pre-designed mold is cast by the die-casting machine. The production cost of die-cast aluminum radiator is controllable, and the heat dissipation wing cannot be thin, so it is difficult to maximize the heat dissipation area.

Extruded aluminum radiator is a radiator that extrudes liquid aluminum through a fixed mold, and then cuts the bar into the desired shape through machining, and the post-processing cost is high.

The heat dissipation wing can be made a lot of thin, the heat dissipation area is expanded to the maximum, and the air convection and heat dispersion are automatically formed when the heat dissipation wing is working, and the heat dissipation effect is better.

The stamping aluminum radiator is to stamping and pulling up the plate of steel and aluminum alloy through punching and die, so that it becomes a cup-shaped radiator, and the internal and external periphery of the stamping and forming radiator is smooth, and the heat dissipation area is limited due to the lack of wings. The stamping part has a small mass and high material utilization, which is a low-cost solution.