Patent ID: 8680825

Claim:
A method for closed-loop control of a DC-DC voltage converter operating in zero-voltage switching mode with a switching threshold, the converter comprising: a plurality of interlaced cells, each cell comprising at least two controlled switches, configured to be alternately closed and open, and each cell further comprising an inductor in which an output current from each corresponding cell flows, and a clock with a given switching period configured for triggering the switching of the switches between upper and lower control thresholds, a control threshold with a value nearest to the switching threshold being denoted as an associated control threshold, the method comprising: measuring, for each cell, an overrun period, wherein the overrun period is a time between a first moment when an intensity of the output current from each corresponding cell is equal to the associated control threshold and a second moment when the intensity of the output current from each corresponding cell is equal to the switching threshold; determining a correction time corresponding to a minimum overrun period measured for the plurality of cells during an interlacing cycle, the interlacing cycle corresponding to the time during which the overrun period is measured for the plurality of cells; calculating an optimized switching period for the clock by subtracting from the given switching period an anticipation time which is a function of the correction time; and applying the optimized switching period to the clock to provide closed-loop control of the interlacing of the output currents from the plurality of cells of the converter.