Whether the LED street lamp is stable or not is critical to the heat dissipation of the lamp body itself

Whether the LED street lamp is stable or not is critical to the heat dissipation of the lamp body itself

According to a research data statistics: every time the component temperature rises by 2℃, the heat will affect the high-brightness LED. The heat is concentrated in a small chip, and the device failure rate will increase exponentially. If the LED can’t dissipate heat well, Its lifespan will also be affected. The main structure of LED lamps using LED light sources is composed of LEDs, heat dissipation structures, drivers, lenses and other parts.

In the LED street lamp lighting system composed of multiple LED strings and parallel arrangement, the problem of heat elimination is always a concern in the industry. Solving the problem of heat management has become the primary factor for high-brightness LED applications, and reliability is reduced by 10 %, the effect is not ideal, heat is particularly easy to generate in the p-type area, and natural insert heat sinks are often used to dissipate heat, causing uneven distribution of thermal stress, chip luminous efficiency and phosphor lasing efficiency; when the temperature exceeds At a certain value.

The temperature of the chip rises, whether the LED street lamp works stably, the heat dissipation of the high-brightness LED street lamps on the market is very important to the heat dissipation of the lamp body itself, and the quality is good or bad, so the heat dissipation is also an important part, because of the III nitrides The p-type doping of Mg is limited by the solubility of the Mg acceptor and the higher starting energy of holes.

A serious self-heating effect is produced. This heat must pass through the entire structure to dissipate on the heat sink; the heat dissipation path of the LED device is mainly heat conduction and thermal convection; the extremely low thermal conductivity of the substrate material leads to an increase in the thermal resistance of the device. Having a devastating impact on the performance and reliability of the device, heat management is a major issue in high-brightness LED applications.