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US 9,425,687 B2Granted
Methods of operating switched mode power supply circuits using adaptive filtering and related controller circuits
AssigneeCree, Inc.
InventorsDaniel Pope, Yuequan Hu
Life of this patent
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Abstract
A method of operating a switched mode power supply circuit can be provided by determining an error in a control signal for the switched mode power supply circuit. The error can be compared to an error threshold value to provide a filtering selection. The error can be adaptively filtered of based on the filtering selection to provide a selected filtering and the error can be filtered using the selected filtering.
Claims27
A method of operating a switched mode power supply circuit, the method comprising:
- determining an error in a control signal for a switched mode power supply circuit;
- comparing the error to an error threshold value to provide a filtering selection;
- adapting filtering of the error based on the filtering selection to provide a selected filtering;
- and
- filtering the error using the selected filtering,
- wherein determining an error in a control signal comprises comparing a present value of the control signal to a target value of the control signal,
- wherein the control signal comprises a duty cycle value of a switching signal provided to the switched mode power supply circuit and the target value comprises a duty cycle target value for the switched mode power supply circuit,
- wherein the error comprises a duty cycle error value and the error threshold comprises a duty cycle error threshold value;
- and
- wherein comparing comprises comparing the duty cycle error value to the duty cycle error threshold value to provide the filtering selection to an overhead regulator configured to provide operational commands to a voltage regulator.
7 more elements
A method of operating a switched mode power supply circuit, the method comprising:
- determining an error in a control signal for a switched mode power supply circuit;
- comparing the error to an error threshold value to provide a filtering selection;
- adapting filtering of the error based on the filtering selection to provide a selected filtering;
- and
- filtering the error using the selected filtering,
- wherein determining an error in a control signal comprises comparing a present value of the control signal to a target value of the control signal
- wherein the control signal comprises a voltage regulator command configured to control a value of output voltage of the voltage regulator and the target value comprises the value of output voltage of the voltage regulator
- wherein the error comprises a voltage regulator output error value and the error threshold comprises a voltage regulator output error threshold value;
- and
- wherein comparing comprises comparing the voltage regulator output error value to the voltage regulator output error threshold value to provide the filtering selection.
7 more elements
A power supply circuit, comprising:
- a voltage regulator configured to receive an input voltage and to generate an output voltage;
- a switching current regulator circuit coupled to the output voltage of the voltage regulator and configured to regulate a level of current supplied to a load, wherein the switching current regulator circuit is controlled by a switching signal having a duty cycle;
- and
- a controller circuit that is configured to compare a voltage regulator error in a voltage regulator output to a voltage regulator error threshold value to adapt filtering used to filter the voltage regulator error used to control the voltage regulator output, wherein the controller circuit is configured to provide a first gain setting for the filtering of the voltage regulator error being less than the voltage regulator error threshold value.
1 more element
A power supply circuit, comprising:
- a voltage regulator configured to receive an input voltage and to generate an output voltage;
- a switching current regulator circuit coupled to the output voltage of the voltage regulator and configured to regulate a level of current supplied to a load, wherein the switching current regulator circuit is controlled by a switching signal having a duty cycle;
- and
- a controller circuit that is configured to compare a voltage regulator error in a voltage regulator output to a voltage regulator error threshold value to adapt filtering used to filter the voltage regulator error used to control the voltage regulator output, wherein the controller circuit is configured to provide a second gain setting for the filtering of the voltage regulator error being greater than the voltage regulator error threshold value.
1 more element
Dependencies are inferred from the claim text.