Patent ID: 7615981
Filing Date: 2009-11-10
Classification: H02M

Abstract:
1. A DC to DC converter for converting a DC input voltage to a DC output voltage, said DC to DC converter comprising: an inductor for receiving said DC input voltage and a current flowing through said inductor; a controller coupled to said inductor and comprising a capacitor having a voltage capable of emulating said current of said inductor in a continuous current mode and a discontinuous current mode, wherein said controller is capable of generating at least one pulse frequency modulation signal according to a first comparison between said voltage of said capacitor and a first predetermined level and according to a second comparison between said voltage of said capacitor and a second predetermined level; at least one switch coupled to said inductor, wherein said at least one switch is controlled by said at least one pulse frequency modulation signal from said controller and provides said DC output voltage; and a feedback circuit coupled to said inductor, wherein said feedback circuit selectively senses said DC output voltage or a voltage at a terminal of said at least one switch and generates a feedback signal.