Now many places use LEDs, and it can be said that LEDs are everywhere in every city. LED, the abbreviation of Light Emitting Diode, translated as light-emitting diode, it is a kind of semiconductor diode, which can convert electrical energy into light energy. Like ordinary diodes, it is composed of a PN junction and has unidirectional conductivity. YONGS LED will introduce to you the classification of LED power supply by driving method.
Constant flow:
1. The constant current drive circuit is ideal for driving LEDs, but the disadvantage is that the price is high.
2. Although the constant current circuit is not afraid of short circuit of the load, it is strictly forbidden to open the load completely.
3. The output current of the constant current drive circuit is constant, but the output DC voltage varies within a certain range with the size of the load resistance.
4. To limit the number of LEDs used, because it has the maximum withstand current and voltage values.
Regulator:
1. After the voltage regulator circuit determines various parameters, the output is a fixed voltage, but the output current changes with the increase or decrease of the load.
2. Although the voltage stabilizing circuit is not afraid of load open circuit, it is strictly forbidden to completely short circuit the load.
3. The voltage change after rectification will affect the brightness of the LED.
4. In order to make the LED display brightness evenly driven by the voltage stabilizing circuit for each string, it is necessary to add a suitable resistor.
