Patent ID: 7615984
Filing Date: 2009-11-10
Classification: H02M,Y02B

Abstract:
1. A DC-DC converter comprising: a transformer having a primary winding for applying a DC voltage and a secondary winding for connecting to a load; a semiconductor switching element connected to the primary winding; and a control unit that controls turning ON and OFF periods of the switching element to match an output voltage of the secondary winding to a reference value, wherein the switching element is turned ON and OFF to supply a DC voltage equal to the reference value for the load through the secondary wiring of the transformer, wherein the control unit comprises: an adjusting unit that outputs a command value adjusted for the output voltage of the secondary winding and the reference value; a triangular wave generating unit that generates a triangular wave; and a comparing unit that compares the command value and the triangular wave to generate a driving signal for the switching element based on the comparison, wherein the triangular wave generating unit varies the inclination of the triangular wave in response to increase and decrease of the command value.