Controlling a power converter
First Claim
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1. An apparatus comprising:
- a load;
a power source;
a capacitive element coupled in series with the power source to enable the power source and the capacitive element to provide the load with a supply voltage that is a sum of the voltages of the power source and the capacitive element, wherein the capacitive element remains coupled in series with the power source as the capacitive element is both charged and discharged; and
a power converter coupled to the capacitive element and the power source, wherein the power converter imposes a limit on current flowing through the power converter, thereby causing the power converter to charge the capacitive element while the load draws a relatively smaller amount of current and causing the power converter to enable the capacitive element to discharge to enable the load to draw a relatively higher amount of current through both the power converter and the capacitive element as the capacitive element discharges.
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Abstract
A load is powered by a power source and a capacitive element in series such that the voltage provided to the load is the sum of the voltages of the power source and the capacitive element. A power converter imposing a limit on a flow of current through at least a portion of the power converter is coupled to the power source and the capacitive element, and selectively causes the capacitive element to either be charged or to discharge depending on the amount of current drawn by the load. As the capacitor discharges, the power source is permitted to supply a relatively higher amount of current to the load.
29 Citations
45 Claims
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1. An apparatus comprising:
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a load; a power source; a capacitive element coupled in series with the power source to enable the power source and the capacitive element to provide the load with a supply voltage that is a sum of the voltages of the power source and the capacitive element, wherein the capacitive element remains coupled in series with the power source as the capacitive element is both charged and discharged; and a power converter coupled to the capacitive element and the power source, wherein the power converter imposes a limit on current flowing through the power converter, thereby causing the power converter to charge the capacitive element while the load draws a relatively smaller amount of current and causing the power converter to enable the capacitive element to discharge to enable the load to draw a relatively higher amount of current through both the power converter and the capacitive element as the capacitive element discharges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An electronic device comprising:
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an amplifier to amplify an audio signal and drive an acoustic driver; a power source; a capacitive element coupled in series with the power source to enable the power source and the capacitive element to provide the amplifier with a supply voltage that is a sum of the voltages of the power source and the capacitive element, wherein the capacitive element remains coupled in series with the power source as the capacitive element is both charged and discharged; and a power converter coupled to the capacitive element and the power source, wherein the power converter imposes a limit on current flowing through the power converter, thereby causing the power converter to charge the capacitive element while the amplifier draws a relatively smaller amount of current and causing the power converter to enable the capacitive element to discharge to enable the amplifier to draw a relatively higher amount of current through both the power converter and the capacitive element as the capacitive element discharges. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method comprising:
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coupling a power source and a capacitive element in series to provide a load with power having a voltage that is the sum of the voltages of the power source and the capacitive element; causing the capacitive element to be charged as the load draws a relatively smaller amount of current; enabling the power source to provide a relatively higher amount of current through the capacitive element by causing the capacitive element to discharge as the load draws a relatively higher current; and causing the capacitive element to remain coupled in series with the power source as the capacitive element is both charged and discharged. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. An apparatus comprising:
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a load; a power source; a capacitive element coupled in series with the power source to enable the power source and the capacitive element to provide the load with a supply voltage that is a sum of the voltages of the power source and the capacitive element; and a power converter coupled to the capacitive element and the power source, wherein the power converter imposes a limit on current flowing through the power converter, thereby causing the power converter to charge the capacitive element while the load draws a relatively smaller amount of current and causing the power converter to enable the capacitive element to discharge to enable the load to draw a relatively higher amount of current through both the power converter and the capacitive element as the capacitive element discharges, wherein; an anode of the power source is coupled to the load and to an input terminal of the power converter; a cathode of the power source is coupled to an anode of the capacitive element and an output terminal of the power converter; and a cathode of the capacitive element is coupled to the load and to a common terminal of the power converter.
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Specification