Patent ID: 6285171
Filing Date: 2001-09-04
Classification: H02M

Abstract:
A DC-DC converter comprisinginput terminals for connecting it to a supply-voltage source,a first branch, coupled to one of the input terminals, which includes a series arrangement of an inductive element and a unidirectional element,switching means comprising at least two switching elements, each switching element forming part of a switching branch which includes a series arrangement of the switching element and an impedance, said switching branch being connected with a first end to a point between the inductive element and the unidirectional element, and with a second end to one of the input terminals,a control circuit coupled to control electrodes of the switching elements for rendering the switching means alternately conducting and non-conducting,a current sensor provided with an output coupled to the control circuit for generating a signal which, during operation, is present at the output and which is a measure of a current through the switching means,characterized in that each one of the impedances in the switching branches is connected to the output of the current sensor via a signal branch, and the current sensor comprises the impedances in the switching branches and the signal branches.