Patent ID: 6292375
Filing Date: 2001-09-18
Classification: H02M,Y02B

Abstract:
A DC voltage converter comprising first and second input terminals for receiving an input voltage, a choke component having a first terminal coupled to the first input terminal and a second terminal coupled to a first terminal of a capacitive branch which has a second terminal coupled to the second input terminal, first and second switches controlled in opposition, and an output transformer having a primary and a secondary feeding a load, the converter being characterized in that the capacitive branch presents two capacitive components (C.sub.1, C.sub.2) connected in series with the common terminal thereof being coupled to a first terminal of the primary (Lp) of said output transformer (T), in that the first and second switches (S.sub.1, S.sub.2) are connected in series and present a common terminal coupled to a second terminal of the primary (Lp) of said output transformer (T), the other terminals of the first and second switches (S.sub.1, S.sub.2) being coupled respectively to the first and second terminals of the capacitive branch (C.sub.1, C.sub.2), and in that it includes a device (CL) for measuring the current flowing through said choke component (L) and a comparator (COMP1) comparing said measured current (Imes) with a reference maximum current (Imax ref), and having its output coupled to a control device which controls opening of the first and second switches (S.sub.1, S.sub.2) whenever the measured current (Imes) exceeds said reference maximum current (Imax ref).