Patent ID: 8891265

Claim:
A switch-mode converter comprising: an inductive transformer having a secondary winding associated with at least one first switch, at least one first diode in series with a capacitive element being connected in parallel with the first switch, and an active circuit connected in parallel with said capacitive element for limiting a voltage thereacross, said active circuit comprising: a transistor connected in parallel with the capacitive element; and an amplifier configured to control the transistor, connected in parallel with the capacitive element, in a linear state based on a voltage across the capacitive element, a first input of the amplifier being coupled to a midpoint of a resistive dividing bridge coupled in parallel with the capacitive element, and a second input of the amplifier being connected, by a voltage source, to one terminal of the capacitive element, wherein the first diode, the capacitive element and the active circuit are configured to limit a voltage across the first switch to a plateau voltage.