Considerations for Heat Dissipation and Technical Issues of High-Power LED Chips

Release Date:

2021-01-13

　　High power LED light bead Precautions for heat dissipation:

　　1. Thermal management requirements for high-power LED lamp beads.

 

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　　Appearance and Material: If the finished product does not have stringent sealing requirements and can directly exchange heat with the ambient air, it is recommended to use finned aluminum or copper heat sinks.

　　2. Effective heat-dissipation surface area of high-power LED chips:

　　For 1 W high-power white LEDs (the same generally applies to other colors), our company recommends a total effective heat-sink surface area of ≥50–60 square centimeters.

　　3. Connection method for high-power LED chips:

　　When connecting the high-power LED chip’s aluminum substrate to the heat sink, ensure that both mating surfaces are flat and in good contact. To enhance the bond between the two surfaces, it is recommended to apply a layer of thermally conductive silicone grease (thermal conductivity ≥ 3.0 W/m·K) to the bottom of the LED aluminum substrate or the surface of the heat sink. The silicone grease should be applied evenly and in an appropriate amount, followed by secure clamping and fastening with screws.

　　High power LED light bead The technical issues specifically manifest as:

　　1. Severe light depreciation or even complete lamp failure is caused by insufficient understanding of the operating conditions required for LED chip light sources.

　　2. Insufficient understanding of road lighting requirements, including the challenges of scientifically designing optical distribution for point light sources and the overlooked importance of color temperature in road lighting, can easily lead to glare, the “zebra effect,” and inadequate pavement illumination under conditions of severe air pollution, rain, or fog.

　　3. Insufficient understanding of the operating conditions for LED chips and of power-supply technology has led to a constant stream of power-supply failures in products.

　　4. There is a lack of clarity regarding the practical application of LED light chips today, leading to indiscriminate efforts to “match” high-power gas-discharge lamps by producing ultra-high-power LED streetlights at any cost. This results in impractical, expensive streetlight products that are difficult to promote.

　　5. Ambiguous requirements for road lighting and insufficient consideration of practical operation and maintenance have led to resistance from end-users.

More information

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