How much is the operating temperature of the LED lamp be controlled?

       First of all: to confirm which thermal resistance of your thermal resistance, which is generally the thermal resistance of the PN junction to the pad foot. The specification will also list the maximum temperature that the PN junction can withstand (typically 120 degrees - 150 degrees). When a finished product is completed, we can only measure the pad foot temperature. At this time, the PN junction can be calculated by the thermal resistance. temperature. For example, when your lamp is lit, it is 1W power, the pad foot temperature is 70 degrees, and the PN junction temperature is (1W*13°/W) +70 degrees. If this temperature is too high or very close to the maximum temperature of the PN junction. The LED light decay will be very serious.

       Secondly, the temperature of the heat-dissipating case is calculated according to the thermal resistance between the pad and the case, which is designed to the thermal resistance of the aluminum substrate, the thermal resistance of the cavity inside the heat sink, and the like. Therefore, a finished product should age the test casing, the main components of the power supply, the lamp board, and the LED pad foot.

       Finally, the calculation is based on the specific situation.

       The temperature inside the cup is also divided into several types: aluminum substrate temperature, pin temperature, chip temperature

       The true determination of LED life is the chip temperature, and from a macro perspective, the case temperature is relatively good test, so everyone thinks that the lower the surgical temperature, the better. Professionally speaking, this is wrong, because the outer casing is only a medium, and the same lamp has different thermal conductivity with different materials, so the temperature will also have a relative difference. So the heat of the outer casing = the heat radiated from the inside - the heat that diffuses into the air or elsewhere

       Then the amount of heat that is emitted inside is definitely as high as possible, and the temperature that is diffused out is determined by itself.

       Compared with the current LED housing temperature, the temperature is generally 50-60 degrees. The pin temperature is generally 70-85 degrees. The temperature of the chip is generally 85-110 degrees.

       And the chip temperature is 85 degrees is already very good, the life is generally 25KH90 degrees, 22KH95 degrees, 19KH100 degrees, 17KH

       What is the normal temperature of the LED lamp bead?

       According to the data of the aging of a single LED white light, if only one LED white light is on, and the ambient temperature is 30 degrees, then the temperature of the bracket when the single LED white light is working will not More than 45 degrees. At this time, the life of this LED will be ideal.

       If there are 100 LED white lights that work at the same time, the interval between them is only 11.4mm, then the bracket white temperature of the LED white light around the stack may not exceed 45 degrees, but in the middle of the stack Those LED white lights are likely to reach a high temperature of 65 degrees. At this time, the LED lamp bead is a test. Then, those LED white lights that are gathered in the middle, in theory, the light decay will be faster, and the LED white light around the lamp stack will slow down.

       However, if the LED beads are separated by more than 25mm, then the heat that they disperse with each other will not accumulate. At this time, the temperature of each LED white light bracket should be less than 50 degrees, which is more conducive to the normal operation of the LED.

       If the LED working environment is in a cold place, the average temperature of the whole year may be only about 15 degrees, or less, then for LEDs, the life is longer.

       Or, when the LED is working, there is a small fan blowing next to it to help it dissipate heat, which is very helpful for the life of the LED.

       Anyway, everyone should know that LED is afraid of heat, the higher the temperature, the shorter the LED life, the lower the temperature, the longer the LED life. The ideal operating temperature of the LED is of course between minus 5 and zero. But this is basically impossible.

       Therefore, after we understand the ideal working parameters of the LED lamp bead, we will strengthen the function of heat conduction and heat dissipation when designing the lamp as much as possible. Anyway, the lower the temperature, the longer the LED life.