AN2823电流源LED驱动的基础上，L5973AD

AN2823电流源LED驱动的基础上，L5973AD

AN2823
Application note

Current source for LED driving based on the L5973AD

Introduction
LEDs are devices where the light intensity (brightness), measured in millicandelas or in
lumens, is proportional to the forward current flowing through them. Two main classes can
be identified given the typical forward current of the final application:
■ Low current LEDs, from 15 mA to 50 mA, mainly used in the portable market for
backlighting and signaling applications
■ High current LEDs, with forward current be