Patent ID: 8203414

Claim:
A transformer for on a circuit board, the circuit board comprising a high-voltage line and a load, wherein the high-voltage line is positioned between the transformer and the load; the transformer comprising: a bobbin comprising a first secondary area configured for winding a secondary coil thereon, wherein the bobbin is made of an insulator, the secondary coil comprising a high voltage end and a low voltage end; a first secondary high voltage pole extending from the first secondary area; a first secondary high voltage pin fixed on an end of the first secondary high voltage pole away from the first secondary area and made of a conductor; a first secondary low voltage pole extending from the first secondary area, and separated from the first secondary high voltage pole; a first secondary low voltage pin positioned on one end surface of the first secondary low voltage pole away from the bobbin, and electrically connected to the high-voltage line; wherein the first secondary high voltage pole and the first secondary low voltage pole are positioned on two opposite ends of the first secondary area, length of the first secondary high voltage pole is greater than length of the first secondary low voltage pole, the high voltage end of the secondary coil is disposed on a top surface of the first secondary high voltage pole and electrically connected to the first secondary high voltage pin and positioned such that the first secondary high voltage pole is capable of jumping across the high-voltage line to make the first secondary high voltage pin electrically connect to the load, the low voltage end of the secondary coil is electrically connected to the first secondary low voltage pin along the first secondary low voltage pole.