Driver device and driving method for driving a load

摘要

The present invention relates to a driver device (10) for driving a load (18), comprising input terminals (14, 16) for connecting the driver device (10) to a voltage supply (12) and for receiving an input voltage (V10) from the voltage supply (12), at least one output terminal for connecting the driver device (10) to the load (18), an electromagnetic converter unit (24) for converting a drive voltage to an output voltage (V20) for powering the load (18), two controllable switches (20, 22) connected to the input terminals (14, 16) for providing a variable voltage as the drive voltage to the electromagnetic converter unit (24), and a control unit (28) for controlling a first of the controllable switches (20, 22) on the basis of an electrical signal (V12) measured at a member of the electromagnetic converter unit (24) and a threshold level (40, 52) and for controlling a second of the controllable switches (20, 22) on the basis of a control parameter (50, tOFF) set to a value that the on-times of the controllable switches (20, 22) have independent durations.

主权项

1. A driver device for driving a load, the driver device comprising:
input terminals for connecting the driver device to a voltage supply and for receiving an input voltage from the voltage supply, an output terminal for connecting the driver device to the load, an electromagnetic converter for converting a drive voltage to an output voltage for powering the load, two switches connected to the input terminals for providing a variable voltage as the drive voltage to the electromagnetic converter, and a controller for controlling;
a first of the two switches, on the basis of an electrical signal measured at the electromagnetic converter and a threshold level, such that switching of the first switch is triggered by a level of the signal crossing the threshold level, anda second of the two switches on the basis of a control parameter that controls on-times of the two switches to have independent durations.