DC/DC CONVERTER WITH STEP -DOWN STEP -UP CASCADE AND METHOD FOR OPERATING IT

摘要

A DC to DC converter (10) comprising a buck converter (12), a boost converter (14), and a control unit (16), wherein the control unit (16) is arranged to calculate an error voltage of the buck converter Verr_buck based on a feedback output voltage Vout_FB of the DC to DC converter (10) and a reference voltage of the buck converter Vref buck, and wherein the control unit (16) is arranged to calculate an error voltage of the boost converter Verr_boost based on the feedback output voltage Vout_FB of the DC to DC converter (10) and a reference voltage of the boost converter Vref_boost, wherein the reference voltage of the boost converter Vref_boost is shifted by an offset Voffset as compared to the reference voltage of the buck converter Vref_buCk-