Patent ID: 8659272

Claim:
A DC/DC converter comprising: a first-voltage-side port that is a first positive electrode, a second-voltage-side port that is a second positive electrode, a common reference terminal, a plurality of switching elements, a plurality of inductors, and a transformer, characterized in that one end of the first switching element and one end of the second switching element are connected to the first voltage-side port; wherein one end of the first inductor is connected to an other end of the first switching element; wherein one end of the second inductor is connected to an other end of the second switching element; wherein one end of the third switching element is connected to the other end of the first switching element; wherein one end of the fourth switching element is connected to the other end of the second switching element; wherein other ends of the third switching element and the fourth switching element are connected to the common reference terminal; wherein the transformer comprises a magnetic-field cancellation type transformer comprising: a primary winding and a secondary winding, wherein the primary winding and the secondary winding are magnetically coupled with each other through a core and have substantially the same winding ratios with an opposite direction connection; wherein one end of the primary winding is connected to an other end of the first inductor; wherein one end of the secondary winding is connected to an other end of the second inductor; wherein one end of the fifth switching element and one end of sixth switching element are connected to the second-voltage-side port; wherein an other end of the fifth switching element is connected to an other end of the primary winding; wherein an other end of the sixth switching element is connected to an other end of the secondary winding; wherein one end of the seventh switching element is connected to the other end of the primary winding; wherein one end of the eighth switching element is connected to the other end of the secondary winding; other ends of the seventh switching element and the eighth switching element are connected to the common reference terminal.