FIELD: electricity.
SUBSTANCE: driver (10) for controlling the load (14), in particular a light head (14) having one or more light emitters, comprises input terminals for receiving an input voltage (V10) from an external power source (12), output terminals for supplying power (16) connected to the input terminals and to the output terminals, the driver stage (16) being adapted to control the input current (I1) outputted from the external power source (12), and For power regulation, n (24) for measuring at least one electric parameter (V10, V12, I2, V20) of the driving stage (16) and for determining the input voltage deviation from the predetermined power supply conditions on the basis of (16) is adapted to regulate the input current (I1) according to predetermined conditions if the deviation from the input voltage is lower than the threshold value (V10, V12, I2, V20) Level of (63), and for providing the input current deviation (I1) of predetermined conditions if the deviation of the input voltage exceeds the threshold level (63).
EFFECT: ensuring compatibility with the requirements for harmonics of the main network and the ability to cope with power failure on the main curcuit while ensuring a continuous stable power supply of the load.
15 cl, 4 dwg
