CURRENT BALANCING CIRCUIT, AND METHOD FOR BALANCING THE PHASE CURRENTS FOR A MULTIPHASE DC-DC CONVERTER SYSTEM

摘要

The invention relates to a current balancing circuit (10) for a multiphase DC-DC converter system (30), having one low-pass filter (12, 14) for each phase of the converter system (30) for filtering a voltage correlated with said phase, wherein each low-pass filter (12, 14) has at least one capacitor (14). In said circuit, one electrode of each capacitor (14) is connected to a common neutral point (S) decoupled from ground, in order to filter a difference between the voltage of the respective phase and a variable reference voltage present at the neutral point (S), and in order to make the filtered voltage available for the current balance regulation of the DC-DC converter system (30). The invention additionally relates to a corresponding method for balancing the phase currents of a multiphase DC-DC converter system (30).