1. Why must the LED fluorescent lamp power supply have a constant current?

The semiconductor characteristics of LEDs determine that they are greatly affected by the environment. For example, temperature. LEDs are current-sensitive components. The increase in LED current will directly lead to increased heat generation. Long-term operation above the rated current will cause the LED chip to stay in a high temperature state for a long time. Shorten the life of the LED. The LED constant current power supply can ensure that its working current remains unchanged when the voltage and other factors change, thereby protecting the LED chip from high temperature damage. As the saying goes-the power supply is easy to understand and easy to destroy.

2. How can the power supply of the LED fluorescent lamp be matched with the light board?

Some customers first design the light board and then look for the power supply. They find that it is difficult to have a suitable power supply. Either the current is too large and the voltage is too small (such as I>350mA, V<40V); or the current is too small and the voltage is too high (such as I180V) , The result is severe heating, low efficiency, or insufficient input voltage range. Choose a suitable series and parallel connection method, the voltage and current added to each LED lamp bead are the same, but the effect of the power supply can exert its excellent performance. The appropriate way is to communicate with the power supply manufacturer first, and tailor it.

3. What is the proper working current of the LED fluorescent lamp power supply?

Generally, the rated working current of LED lamp beads is 20 mA, and some factories use it up at the beginning. The design is 20 mA. In fact, the working current under this current is very serious. After many comparison tests, it is designed to be 17-19 mA. It is ideal, and the recommended design is 18 mA, which can ensure that the life of the product is much higher than that of similar products, although the cost will increase by a few percentage points.