Charger

The utility model relates to a charger comprising a first housing and a second housing, the first housing and the second housing are connected to form an inner cavity, and the inner cavity is provided with a mainboard, a first circuit board and a second circuit board; the first circuit board and the second circuit board are inserted into the main board, so that the transverse area of the charger is effectively reduced, elements on the main board, the first circuit board and the second circuit board are reasonably distributed, the layout space of the elements is reduced, and the size of the charger is effectively reduced. Meanwhile, the second circuit board is arranged between the transformer and the first circuit board, so that connection between the transformer and the output rectifying circuit and the low-voltage filter circuit on the second circuit board is conveniently arranged, fly wires of the transformer are effectively reduced, the power density of the charger is improved, and small size and high powe