Constant current power supply and constant voltage power supply

Constant current power supply and constant voltage power supply

According to the circuit scheme, LED power supply is generally divided into: constant current power supply, constant voltage power supply, constant power power supply, constant current IC, etc. What we are talking about today is also used by current LED lamps, most of which are constant current power supplies. The output current of the constant current drive power supply is constant (±5% accuracy), and the output DC voltage is within a range, which varies within a certain range with the load resistance value. The load resistance value is small, and the output voltage The lower the load resistance, the higher the output voltage, for example: AC100-240V DC30-40V 800MA (±5%).

Constant voltage drive power supply means that when the parameters in the voltage stabilizing circuit are determined, the output voltage is fixed, but the output current changes with the increase or decrease of the load, for example: AC100-277V DC24V 0-1250mA.