LED Applications With PIC® MCU

LED light output is a direct function of the current flow. Too little current and the light will dim; too much current and lifetimes will be shortened. A typical LED driver is a DC power supply that provides converted AC or DC power to directly control the LED via constant current, Pulse Width Modulation (PWM), or other variations. The LED driver must also provide high efficiencies and Power Factor Correction (PFC) while protecting the light from AC line voltage fluctuations.