DC-DC CONVERTER, POWER SUPPLY SYSTEM COMPRISING DC-DC CONVERTER AND METHOD FOR CONTROLLING A DC-DC CONVERTER

The present disclosure relates to a DC-DC converter (), comprising a first DC port (A) connectable to a DC source (B), a second DC port (B) with a positive terminal (PT), a midpoint terminal (MT) and a negative terminal (NT) connectable to a DC bus (). A first capacitor (C) is connected between the positive terminal (PT) and the midpoint terminal (MT) and a second capacitor (C) is connected between the midpoint terminal (MT) and the negative terminal (NT). The DC-DC converter () comprises a first switching circuit (), a second switching circuit () and a resonant circuit () connected between the first switching circuit () and the second switching circuit (). The second switching circuit () comprises a first switch (Q), a second switch (Q), a third switch (Q), and a fourth switch (Q).