Patent ID: 7738265

Claim:
A device comprising: a control arrangement for a voltage converter comprising: a first input electrically connected to a device configured to sense a first current in a primary side of a transformer, the transformer being configured to convert a first DC voltage into a second DC voltage, a first output electrically connected to a control terminal of a transistor, the transistor being electrically connected in series with the primary side of the transformer, the first output being configured to supply a control signal to the control terminal of the transistor, a computing unit electrically connected to the first output, the computing unit being configured to adjust the control signal so that the transistor has a low resistance value during a switched-on phase having a switched-on duration and a high resistance value during a switched-off phase having a switched-off duration, a first comparator having: a first input electrically connected to the first input of the control arrangement, the first input of the comparator configured to be supplied with a value of the first current or a value derived from the value of the first current, a second input configured to supply an adjustable setpoint value, and an output electrically connected to an input of the computing unit to adjust the duration of the switched-off phase.