Heat dissipation of LED street light chips

LED street light chips are characterized by generating extremely high heat in a very small volume. The heat capacity of the LED itself is very small, so the heat must be conducted out at the fastest speed, otherwise a high junction temperature will be generated. In order to draw the heat out of the chip as much as possible, many improvements have been made on the chip structure of the LED. In order to improve the heat dissipation of the LED chip itself, the main improvement is to use a substrate material with better thermal conductivity. Early LEDs just used Si silicon as a substrate. Later, it was changed to sapphire as the substrate. However, the thermal conductivity of the sapphire substrate is not very good (about 25W/(mK) at 100°C). In order to improve the heat dissipation of the substrate, Changhui Lighting Technology Co., Ltd. uses a silicon carbide substrate, and its thermal conductivity ( 490W/(mK)) is nearly 20 times higher than that of sapphire. Moreover, sapphire needs to be solidified with silver glue, and the thermal conductivity of silver glue is also very poor. The only disadvantage of silicon carbide is that it is more expensive. CHZ Changhui Lighting Technology Co., Ltd. is located in Shanghai, Shandong, which is known as the sun valley of the world. It is a comprehensive high-tech enterprise mainly engaged in the research and development, production, sales and service of LED application lighting products. The company's main products are street lamps, led street lamps, solar street lamps, street lamp lamp holders, LED street lamp lamp holders, high pole lamps, signal lamps, landscape lamps, garden lamps, lawn lamps and LED lighting product series. It is a professional street lamp manufacturer and lighting products. manufacturer. Company: Shanghai CHZ Changhui Lighting Technology Co., Ltd. Website: www.chz-lighting.com