Patent ID: 8519685
Filing Date: 2013-08-27
Classification: H02M

Abstract:
1. A control device for controlling in interlaced mode a power supply with DC-DC splitting, said device comprising: n cells each forming a path for converting an input voltage to an output voltage, wherein the control device supplies n pulse-modulated activation signals of a same splitting frequency f, and offset from one another by a fixed time offset, each of said n pulse-modulated activation signals controlling a respective splitting switch of a respective cell among the n cells, a control circuit for controlling a number of paths to be activated as a function of a level of power or of current in the power supply, wherein, for a number m of paths to be activated that is smaller than n, said control circuit for controlling the number m of activated paths applies a rule that rotates the activated paths in shifts among the n available paths, wherein the control circuit drives a respective first disabling circuit for each respective cell among the n cells so as to selectively disable transmission of the activation signals to some of the cells, so that, at each moment, only m activation signals out of n are transmitted, wherein the splitting switch of each cell is placed in a switching-aid resonant circuit comprising an auxiliary switch for triggering a resonance phase, wherein said control device supplies n additional pulse-modulated activation signals of the same splitting frequency f, and offset from one another by a fixed time offset, each of said n additional pulse-modulated activation signals controlling a respective auxiliary switch of a respective cell among the n cells, wherein the control circuit drives a respective second disabling circuit for each respective cell among the n cells so as to selectively disable transmission of the additional activation signals to some of the cells, so that, at each moment, only m additional activation signals out of n are transmitted.