Most Led power supplies are constant current sources, which means that the output current of the power supply is constant, and the voltage changes within a certain range.The LED drive power supply is a power converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Normally, the input of the LED drive power includes high-voltage power frequency AC (ie city power), low-voltage DC, high-voltage DC, low-voltage Frequency AC (such as the output of an electronic transformer), etc.
This emergency driver accords with GB17945-2010, it is suitable for all 5-20W (Max 22W) LED lamps with internal IC driver