1. Why must the LED fluorescent lamp power supply be constant current?
The characteristics of LED semiconductors determine that they are greatly affected by the environment. For example, when the temperature increases, the current of the LED will increase; when the voltage increases, the current of the LED will also increase. Exceeding the rated current for a long time will greatly shorten the service life of the LED. The LED constant current is to ensure that its operating current remains unchanged when environmental factors such as temperature and voltage change.
2. How can the LED fluorescent lamp power supply be matched with the lamp board?
Some customers design the light board first, then find the power supply, and 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 I< 40mA, V>180V), the result is serious heat generation, low efficiency, or insufficient input voltage range.
In fact, choose an optimal series-parallel connection method, the voltage and current applied to each LED are the same, and the effect of the power supply can exert the best performance. The best way is to communicate with the power supply manufacturer first and customize it.
3. What is the most suitable working current of the LED fluorescent lamp power supply?
Generally, the rated working current of LED is 20 mA. Some factories use it up at the beginning. The design is 20 mA. In fact, the working heat is very serious under this current. After many comparison tests, the design is 17-19 mA. Ideally, the recommended design is 18 mA.
4. What is the working voltage of the LED fluorescent lamp power supply?
The recommended working voltage of the general LED is 3.0-3.5V. After testing, most of them work at 3.125V, so it is more reasonable to calculate according to 3.125V. The total voltage of M lamp beads in series = 3.125*M.