Voltage regulator having variable frequency-based control
First Claim
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1. A voltage regulator comprising:
- an energy storage element to produce an output voltage;
at least one switch to energize and de-energize the energy storage element pursuant to switching cycles, each switching cycle including an on time interval during which said at least one switch operates to energize the energy storage element and an off time interval during which said at least one switch operates to de-energize the energy storage element; and
a controller coupled to said at least one switch and adapted to;
receive an indication of the output voltage, andregulate both a duration of the on time interval and a duration of the off time interval based on the indication of the output voltage without referencing a switching signal having a predefined frequency.
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Abstract
A voltage regulator includes an energy storage element to produce an output voltage, a switch and a controller. The switch energizes and de-energizes the energy storage element at a switching frequency. The controller is coupled to the switch and receives an indication of the output voltage. The controller controls the switching frequency to regulate the output voltage based on the indication.
43 Citations
25 Claims
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1. A voltage regulator comprising:
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an energy storage element to produce an output voltage; at least one switch to energize and de-energize the energy storage element pursuant to switching cycles, each switching cycle including an on time interval during which said at least one switch operates to energize the energy storage element and an off time interval during which said at least one switch operates to de-energize the energy storage element; and a controller coupled to said at least one switch and adapted to; receive an indication of the output voltage, and regulate both a duration of the on time interval and a duration of the off time interval based on the indication of the output voltage without referencing a switching signal having a predefined frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for use with a voltage regulator, comprising:
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cycling energy through an energy storage element pursuant to switching cycles, each switching cycle including an on time interval to energize the energy storage element and an off time interval to de-energize the energy storage element; and comparing an indication of an output voltage of the regulator with at least one threshold; and based on the comparison, regulating both a duration of the on time interval and a duration of the off time interval without referencing a switching signal having a predefined frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A computer system comprising:
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an energy storage element to produce an output voltage; a processor to receive the output voltage; at least one switch to energize and de-energize the energy storage element pursuant to switching cycles, each switching cycle including an on time interval during which said at least one switch operates to energize the energy storage element and an off time interval during which said at least one switch operates to de-energize the energy storage element; and a controller coupled to said at least one switch and adapted to; receive an indication of the output voltage, and regulate both a duration of the on time interval and a duration of the off time interval based on the indication of the output voltage without referencing a switching signal having a predefined frequency. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification