Abstract: A transformer can be mounted on a circuit board. The circuit board includes a high-voltage line and a load. The transformer includes a bobbin used for winding a coil. The bobbin includes a first secondary area. A first secondary high voltage pole extends from the first secondary area. A first secondary high voltage pin is fixed on an end of the first secondary high voltage pole away from the first secondary area. The bobbin is made of an insulator. The first secondary high voltage pin is made of a conductor. The high voltage end of the coil is disposed on a top surface of the first secondary high voltage pole and electrically connected to the first secondary high voltage pin. The first secondary high voltage pole is capable of jumping across the high-voltage line to make the first secondary high voltage pin to electrically connect to the load.

Abstract: A high voltage transformer includes a first core and a second core coupled to the first core. The first core includes a protruding portion isolating the second core into a first winding portion and a second winding portion. The first winding portion is wrapped by a first primary winding and a first secondary winding to define a first magnetic circuit, and the second winding portion is wrapped by a second primary winding and a second secondary winding to define a second magnetic circuit. Direction of the first magnetic circuit is reversed to that of the second magnetic circuit. Width of the protruding portion is adjustable to achieve different leakage inductances between the first secondary winding and the second secondary winding, so as to balance current flowing through the first secondary winding and the second secondary winding.

Abstract: A transformer can be mounted on a circuit board. The circuit board includes a high-voltage line and a load. The transformer includes a bobbin used for winding a coil. The bobbin includes a first secondary area. A first secondary high voltage pole extends from the first secondary area. A first secondary high voltage pin is fixed on an end of the first secondary high voltage pole away from the first secondary area. The bobbin is made of an insulator. The first secondary high voltage pin is made of a conductor. The high voltage end of the coil is disposed on a top surface of the first secondary high voltage pole and electrically connected to the first secondary high voltage pin. The first secondary high voltage pole is capable of jumping across the high-voltage line to make the first secondary high voltage pin to electrically connect to the load.