In a power converter apparatus, a control unit can perform cyclical control that cyclically repeats switching control that switches operations between a third operation, a first operation, the third operation, and a second operation in that order. The control unit performs at least first control, in which a third switching element is switched between off, on and off states in that order during each first operation in the above cyclical control, the third switching element is switched between the off, on and off states in that order during each second operation, and the third switching element is kept in the off state during each third operation.

An integrated circuit (IC) for driving a Controller Area Network (CAN) bus is provided. The IC may include a push-pull transformer having a primary winding split into two halves with a center tap and a secondary winding split into two halves, an energy pump circuit coupled to the primary winding, the energy pump circuit including a first transistor and a second transistor alternately switching to drive the primary winding, at least two diodes coupled to the secondary winding to perform full-wave rectification of an alternating current (AC) voltage induced in the secondary winding, and a smoothing capacitor coupled to the secondary winding to filter the rectified voltage into a steady direct current (DC) output for driving the CAN bus.