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The cooling principle of LED Lights

Time:2015-10-04 Views:856 Compile:SUNPER

When it comes to the principle of LED lights cooling, one of the most considered factors include the power of the LED lights as well as the heat problem of the LED lights. The power of the LED basically means the operating current which is more than 100mA. The LED lights products contain a line marked with reference to the definition of the United States known as ASSIST Union. This is according to the already existing two types of LED forward voltage value of 2.1 Volts and the other one with a voltage of 3.3 Volts. Their input powers include the 210mw and 330mw power respectively.

 

It is important noting that prior using any LED device, you should first consider if there is any problem with the way thermal is spreading. By doing so, you are sure that you will be improving the reliability of the lifespan of these products. Generally, it is a must to consider LED thermal problems. The main parameters that are related to thermal resistance include heat dissipation as well as other heat-related parameters such as junction temperature as well as temperature rise.

 

Thermal Resistance


Thermal resistance basically refers to the effective temperature and external devices available divided by the temperature difference between a point in the device steady state power dissipation quotient. This is the most crucial parameter for any LED device to cool. China reported the best thermal resistance of 5 per watt, up from 3 per watt. A level like this one ensures a long lifespan of the LEDs products.

 

Junction Temperature


Junction temperature means the semiconductor junction temperature of the LEDs. It is the embodiment of the LED devices under the normal operating conditions and the ability to withstand temperature. This has formulated the goal to improve heat resistance. Both the chip and phosphor which are known to have high heat resistance have now reached the junction temperature at 150. Since the heat resistance is higher, there are lower cooling requirements.

 

Temperature Rise


However, there are some temperature rises that occur and hence they should be looked at carefully. Temperature may rise due to different factors such as environmental temperature rise. This refers to the LED device package temperature and environment. There is a direct measurement of the temperature value and this directly reflects the LED device peripheral cooling degree. If the measured LED bulb is 60, then its temperature should be 30. This ensures that the lifespan of the LED devices is usual. If the temperature is too high to maintain this, then the rate if the LED lights source should be decreased greatly.




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