POWER CONTROL UNIT AND METHOD FOR CONTROLLING ELECTRICAL POWER PROVIDED TO A LOAD IN PARTICULAR AN LED UNIT AND VOLTAGE CONTROL UNIT FOR CONTROLLING AN OUTPUT VOLTAGE OF A CONVERTER UNIT

摘要

The present invention relates to a power control unit (40; 60) for controlling electrical power provided to a load (12) in particular an LED unit (12) comprising one or more LEDs said driver device comprising a converter unit (10) having an input terminal (42) for receiving an input voltage (V10) from an external power supply (22) and having an output terminal (44) for providing an output voltage (V14) to power the load (12) wherein the converter unit (10) comprises a switching device (14) for transforming the input voltage (V10) to the output voltage (V14) a control unit (20) for controlling the switching device (14) signal means (46; 62) connected to the output terminal (44) for applying a voltage or current signal to the output terminal (44) wherein the control unit (20) is connected to the signal means (46; 62) and adapted to control the signal means (46; 62).