LED Drivers and Power Supplies
An LED driver or LED power supply
regulates the incoming power to provide a constant current
or constant voltage
for operating an LED
or a string (or strings) of LEDs. The driver may be designed to accept input power of various types, including alternating current (AC) line power and direct current (DC) power from DC micro-grids or Power over Ethernet (PoE). The driver may include dimming circuits to adjust the light output.