Controller for modifying dead time between switches in a power converter
First Claim
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1. A power converter, comprising:
- first and second power switches coupled to an input of said power converter;
a sensor configured to provide a sensed signal representative of at least one of a current level and a power level of said power converter, and limit a value of said sensed signal; and
a controller configured to increase a dead time between conduction periods of said first and second power switches when said sensed signal indicates a decrease of at least one of said current level and said power level of said power converter, a modification of said dead time being constrained to a dead time limit in accordance with said limit of said value of said sensed signal.
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Abstract
A power converter employing a controller configured to increase a dead time between conduction periods of first and second power switches therein and method of operating the same. In one embodiment, the power converter includes first and second power switches coupled to an input thereof, and a sensor configured to provide a sensed signal representative of at least one of a current level and a power level of the power converter. The power converter also includes a controller configured to increase a dead time between conduction periods of the first and second power switches when the sensed signal indicates a decrease of at least one of the current level and the power level of the power converter.
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Citations
20 Claims
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1. A power converter, comprising:
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first and second power switches coupled to an input of said power converter; a sensor configured to provide a sensed signal representative of at least one of a current level and a power level of said power converter, and limit a value of said sensed signal; and a controller configured to increase a dead time between conduction periods of said first and second power switches when said sensed signal indicates a decrease of at least one of said current level and said power level of said power converter, a modification of said dead time being constrained to a dead time limit in accordance with said limit of said value of said sensed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a power converter, comprising:
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coupling first and second power switches to an input of said power converter; providing a sensed signal representative of at least one of a current level and a power level of said power converter; limiting a value of said sensed signal; and controlling said first and second power switches by increasing a dead time between conduction periods thereof when said sensed signal indicates a decrease of at least one of said current level and said power level of said power converter, a modification of said dead time being constrained to a dead time limit in accordance with limiting said value of said sensed signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification