TUTORIALS 4472

How to Apply Additional PWM Intensity Control to LED Drivers

By: Walter Chen

Abstract: Maxim Integrated provides many LED (light-emitting diode) drivers, with PWM (pulse-width modulation) intensity control. This application note explains several methods for applying additional PWM-based intensity control to LED drivers. Several constant-current LED drivers, with or without built-in PWM, serve as examples of the techniques.