Patent ID: 6088247
Filing Date: 2000-07-11
Classification: H02M,Y02B

Abstract:
A voltage clamp for a voltage converter having:a primary input stage comprising a primary switch connected in series with a primary winding,a secondary output stage, said voltage clamp limiting a peak of a switching voltage when said primary switch is opened and being connected in parallel with and across said primary winding,first and second switches having respective first and second turn-off speeds, the first turn-off speed being faster than the second turn-off speed, said first switch being electrically connected to said primary input stage between said primary switch and a first side of said primary winding,a first resistor connected in parallel with said first switch, forming a first parallel circuit, anda second resistor and a capacitor connected in a second parallel circuit, said second parallel circuit being connected in series with and between said first parallel circuit and said second switch.