Patent ID: 6992468
Filing Date: 2006-01-31
Classification: H02M

Abstract:
1. A pulsed voltage converter, comprising: an energy storage inductor; a switching element connected to said energy storage inductor and driven by a switching clock, said switching element connecting said energy storage inductor to an input voltage and disconnecting said energy storage inductor from the input voltage, in accordance with the switching clock; a diode having a first terminal connected to said energy storage inductor and to said switching element, and a second terminal where an output voltage can be tapped off; a digitization unit supplying a digital signal representative of a magnitude of the output voltage and connected to said second terminal of said diode; and a digital control circuit connected to said digitization unit and utilizing a sampling clock for reading the digital signal supplied from said digitization unit resulting in digital signal values, a frequency of the sampling clock being higher than a frequency of the switching clock, said digital control circuit generating a control value from the digital signal values, said digital control circuit having a switching clock generator connected to said switching element and producing the switching clock for driving said switching element, at least one of a duty ratio and the frequency of the switching clock being influenced by the control value, said digital control circuit further having a counter whose count is incremented for each of the digital signal values read during an off phase of the switching clock that have an output voltage greater than a reference voltage, and the count is decremented for each of the digital signal values read during the off phase of the switching clock that have an output voltage less than the reference voltage.