Current balancing circuit and method for balancing the phase currents for a multi-phase DC-DC converter system

摘要

The invention relates to a current balancing circuit (10) for a multiphase DC-DC converter system (30) each having a low-pass filter (12, 14) for each phase of the converter system (30) for filtering a voltage correlated with this phase, each low-pass filter (12 , 14) has at least one capacitor (14), wherein in each case one electrode of each capacitor (14) is connected to a common ground-decoupled star point (S), in each case a difference in the voltage of the respective phase and at the neutral point (S ) and to provide the filtered voltage for a current balance control of the DC-DC converter system (30). Moreover, the invention relates to a corresponding method for balancing the phase currents of a multi-phase DC-DC converter system (30).