Driver for driving an LED light engine of an LED tube

A driver for driving a light-emitting diode (LED) light engine of an LED tube, the driver comprising:

• a first driver unit comprising a first input stage for connecting the first driver unit to a power supply, a first output stage for connecting the first driver unit to the LED light engine, and a first power converter stage for converting a first input power from an alternating current (AC) mains or an electromagnetic control gear (CCG) into a first output power for driving the LED light engine;
• and
• a second driver unit comprising a second input stage for connecting the second driver unit with the power supply, a second output stage for connecting the second driver unit to the LED light engine, a second power converter stage for converting a second input power from an electronic control gear (ECG) into a second output power for driving the LED light engine, and a relay and a relay trigger circuit for electrically connecting the second input stage and the second power converter stage such that the second input stage is galvanically isolated from the second power converter stage;
• wherein the first driver unit and the second driver unit are electrically connectable to the LED light engine in such a way that:
• when the LED tube is connected to the AC mains or CCG, the first driver unit is active for driving the LED light engine, and the second driver unit remains inactive;
• and
• when the LED tube is connected to the ECG, the second driver unit is active for driving the LED light engine, and the first driver unit remains inactive.