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.