Drive circuit for light emitting diodes has LED current regulating device that detects LED brightness and/or current and compares it with desired value that can be set by controller

摘要

The circuit has a switching regulator (4) supplied with direct voltage as an input voltage that drives the light emitting diode or LED (1) on the output side, whereby a device for regulating the current through the LED to an adjustable value detects the brightness and/or the current of the LED and compares it with a desired value which can be set by the controller.