Because of the diversity of the field, the environmental complexity of the environment, LED power supply must have a good waterproof performance, but how long-term effective waterproof, you need a system solution, which is troubled by many manufacturers and device vendors problems, such as: Not all systems offer a high level of water protection on the line. High watertightness usually requires a fully enclosed installation, which can cause heat dissipation problems and may cause system errors caused by overheating. Is there any solution for the best of both worlds?
First let us talk about IP, on the IP protection level, composed of two figures, the first number that electrical dust, to prevent the invasion of foreign objects (the maximum level is 6), the first two figures that electrical moisture , The degree of water intrusion (maximum level is 8), the greater the number that the higher the degree of protection. LED power according to different needs, can be designed for IP65, IP66, IP67 and other different waterproof and dustproof level.
In order to achieve a different degree of IP protection and design requirements, you can use the shell protection, irrigation seal protection, irrigation and shell composite protection and other forms. As the shell seal is easy to aging cracking, open the cost of high defects, only applies to the waterproof cooling requirements of LED products. And waterproof and excellent heat performance potting, more suitable for outdoor and high power LED power. As a well-known power manufacturers advertising "only irrigation can really rain".
So, the market a wide variety of potting, which is more suitable for waterproof LED potting it?
More than three commonly used potting in the waterproof flame retardant and other properties to meet the needs of LED waterproof power supply, thermal performance Spark CQ18P better, the temperature range Dow Corning 8760 wider. With a good heat sealing pot seal LED power, you can also solve the problem of water and heat.
It is worth all, after filling, the components filled with full potting between the components, the dielectric constant will change from 1.0 to 4.5 or so, the line of some of the emission or sensitive parts, such as common mode inductors, LLC transformers need to add Shielding or adjusting the winding method.
Finally, the appropriate shell structure with potting, coupled with wire seals, more effective to ensure waterproof effect.