Zero-voltage-switched multiresonant DC to DC converter
First Claim
1. A zero-voltage-switched multiresonant converter for generating a regulated DC output voltage for supply to a load from a DC input voltage provided by a DC voltage source, comprising:
- a first transistor switch connected in series with said DC voltage source and said load;
a second transistor switch connected in parallel with said DC voltage source and said load;
a first capacitor connected in parallel with said first transistor switch;
a second capacitor connected in parallel with said second transistor switch;
a first inductor connected in series with said DC voltage source, said load and both of said first and second transistors switches;
means coupled to the gate of said first transistor switch for controlling switching of said first transistor switch as a function of the input voltage provided by said voltage source to said converter for stabilizing the current through said first inductor; and
means coupled to the gate of said second transistor switch for controlling switching of said second transistor switch as a function of the output voltage of said converter.
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Accused Products
Abstract
A multiresonant DC to DC converter which operates at a substantially fixed frequency yet maintains relatively constant efficiency levels despite wide variations in input voltage. The multiresonant converter includes a first transistor switch in series with the DC voltage supply source and the load and a second transistor switch in parallel with the DC voltage supply source and the load. The switching action of the first transistor switch is controlled as a function of the supply voltage input to the converter while the duty factor of the second transistor switch is controlled in accordance with the output voltage of the converter.
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Citations
14 Claims
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1. A zero-voltage-switched multiresonant converter for generating a regulated DC output voltage for supply to a load from a DC input voltage provided by a DC voltage source, comprising:
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a first transistor switch connected in series with said DC voltage source and said load; a second transistor switch connected in parallel with said DC voltage source and said load; a first capacitor connected in parallel with said first transistor switch; a second capacitor connected in parallel with said second transistor switch; a first inductor connected in series with said DC voltage source, said load and both of said first and second transistors switches; means coupled to the gate of said first transistor switch for controlling switching of said first transistor switch as a function of the input voltage provided by said voltage source to said converter for stabilizing the current through said first inductor; and means coupled to the gate of said second transistor switch for controlling switching of said second transistor switch as a function of the output voltage of said converter. - View Dependent Claims (2, 3, 4, 5)
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6. A process for controlling the switching action in a zero-voltage-switched multiresonant DC to DC converter which is operative for generating a regulated output voltage for supply to a load from an unregulated input voltage supplied by a voltage source and which includes a first transistor switch in series with said load and a second transistor switch in parallel with said load, said process comprising the steps of:
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regulating the duty factor of said first transistor switch as it is switched on and off at high frequency as an inverse function of the input voltage supplied by said voltage source; and regulating the duty factor of said second transistor switch as it is switched on and off at high frequency as a function of the output voltage supplied to said load. - View Dependent Claims (7, 8)
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9. A multiresonant converter for converting a DC input signal from a voltage supply source to a regulated DC output signal for supply to a load, said converter comprising:
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an input stage for receiving said DC input signal; an output stage for imposing said DC output signal across said load; a first transistor switch interposed between said input and output stages in series with said voltage supply source and said load; a second transistor switch interposed between said input and output stages in parallel with said voltage supply source and said load; reactive means interposed between said input and output stages for allowing said transistor switches to be switched on at zero-voltage levels; means for controlling the switching action of said first switch as a function of said DC input signal; means for controlling the switching action of said second switch as a function of said DC output signal. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification