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US 11,108,327 B2Granted
Selected-parameter adaptive switching for power converters
AssigneeTexas Instruments Incorporated
InventorsSubrahmanya Bharathi Akondy, Hrishikesh Nene
Life of this patent
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Abstract
A selected-parameter adaptively switched power conversion system, for example, includes a counter for determining a period of an output oscillation a power supply switch, where the output oscillation starts when an output current generated by stored power of the power supply coil decays substantially to zero. An event generator for generating a switching delay event in response to the determined output oscillation period and generates a switching delay event in response to a determination of a phase of the output oscillation.
Claims20
A circuit, comprising:
- an event selection and processing module configured to select a selected parameter of a power supply switch to be a first parameter of the power supply switch or a second parameter of the power supply switch;
- a programmable valley point delay module coupled to the event selection and processing module, the programmable valley point delay module comprising:
- an adaptive edge filter module configured to locate peaks in the selected parameter;
- a valley counter coupled to the adaptive edge filter module, the valley counter configured to determine a period of an oscillation of the selected parameter based on the peaks in the selected parameter;
- and
- a valley delay estimation module coupled to the valley counter, the valley delay estimation module configured to:
- determine a phase offset between a zero crossing of the oscillation of the selected parameter and a center of an oscillation of a third parameter of the power supply switch or between a center of an oscillation of the selected parameter and a zero crossing of the oscillation of the third parameter, the third parameter being the first parameter or the second parameter;
- and
- generate an estimate of a valley point of the selected parameter based on the period of the oscillation of the selected parameter and based on the phase offset.
6 more elements
A power supply system, comprising:
- a power supply switch;
- an event selection and processing module configured to select a selected parameter of the power supply switch to be a first parameter of the power supply switch or a second parameter of the power supply switch;
- a programmable valley point delay module coupled to the event selection and processing module, the programmable valley point delay module comprising:
- an adaptive edge filter module configured to locate peaks in the selected parameter;
- a valley counter coupled to the adaptive edge filter module, the valley counter configured to determine a period of an oscillation of the selected parameter based on the peaks of the selected parameter;
- and
- a valley delay estimation module coupled to the valley counter, the valley delay estimation module configured to:
- determine a phase offset between a zero crossing of the oscillation of the selected parameter and a center of an oscillation of a third parameter of the power supply switch or between a center of an oscillation of the selected parameter and a zero crossing of the oscillation of the third parameter, the third parameter being the first parameter or the second parameter;
- and
- generate an estimate of a valley point of the selected parameter based on the period of the oscillation of the selected parameter and based on the phase offset.
7 more elements
A method, comprising:
- selecting, by an event selection and processing module, a selected parameter of a power supply switch to be a first parameter of the power supply switch or a second parameter of the power supply switch;
- locating, by an adaptive edge filter module, peaks in the selected parameter;
- determining, by a valley counter, a period of an oscillation of the selected parameter based on the peaks in the selected parameter;
- determining, by a valley delay estimation module, a phase offset between a zero crossing of the oscillation of the selected parameter and a center of an oscillation of a third parameter of the power supply switch or between a center of an oscillation of the selected parameter and a zero crossing of the oscillation of the third parameter, the third parameter being the first parameter or the second parameter;
- and
- generating, by the valley delay estimation module, an estimate of a valley point of the selected parameter based on the period of the oscillation of the selected parameter and based on the phase offset.
3 more elements
Dependencies are inferred from the claim text.