Patent ID: 7583064
Filing Date: 2009-09-01
Classification: H02M

Abstract:
1. A booster circuit comprising: an input terminal and a common terminal, an input voltage applied to the input terminal and the common terminal; an output terminal, in which an output voltage is provided on the common terminal; a transformation unit that includes a first winding, a second winding, and a third winding, the windings wound in a same direction and connected in series; a first rectifier unit provided between the input terminal and a connection point of the first winding and the second winding; a second rectifier unit provided between the input terminal and a connection point of the second winding and the third winding; a first switching unit provided between one end of the transformation unit and the common terminal; a second switching unit provided between other end of the transformation unit and the common terminal; a third rectifier unit provided between a connection point of the one end of the transformation unit and the first switching unit and the output terminal; and a fourth rectifier unit provided between a connection point of the other end of the transformation unit and the second switching unit and the output terminal, wherein the first winding and the third winding have an approximately same number of turns; and the first switching unit and the second switching unit alternately open and close in response to a pair of control signals.