CIRCUITRY FOR DIMMING LED ILLUMINATION DEVICES

摘要

Proposed is a current supply circuitry (1) for at least one LED (10), comprising at least one inductive reactance connected as a storage choke (20) in series with the LED(10), a free running current path (30), connected parallel to the series connection of the LED (10) and the storage choke (20), a switch (40) for switching between a charging and a discharging process occurring in the storage choke (20). The current supply circuitry (1) is characterized in that the circuitry comprises control means (50) arranged to change the current supplied to the LED (10) from a continuous conduction mode to a discontinuous conduction mode at an adjustable dimming level of the LED (10).