DIGITAL DRIVER APPARATUS, METHOD AND SYSTEM FOR SOLID STATE LIGHTING

摘要

An apparatus, method and system are provided for controlling the solid state lighting, such as LEDs An exemplary apparatus comprises a switch for switching electrical current through the LEDs, a current sensor, a first comparator adapted to determine a switch current first predetermined threshold, a second comparator determining the switch current reached an average level, controller adapted to turn the switch into on/off states, determine a first on time period as a duration between either second predetermined threshold detection or the turning the switch into the on state, and the detection of the predetermined average current level, determine a second on time period as a duration between predetermined average current level and first predetermined threshold detection, determine an on time switch penod as proportional to first and second on time periods Additionally, utilize a difference between first and second on time periods to generate an error signal.