Method and apparatus for control of switch mode power supplies utilizing magnetic and capacitive conversion means
First Claim
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1. A power supply comprising:
- a switched capacitor array comprising of switches and capacitors;
a first terminal of the switched capacitor array coupled to a first terminal of a magnetic storage element;
wherein the capacitors in the switched capacitor array are charged and discharged with a current flowing through the magnetic storage element;
wherein voltages on the capacitors in the switched capacitor array are regulated by changing a time duration of the current flowing through the capacitors in the switched capacitor array;
wherein the time duration is changed repetitively in steady state of operation by changing a time position of a leading edge of a first signal which turns on a first switch in the switched capacitor array wherein the turning on of the first switch in the switched capacitor array causes current in the magnetic storage element to increase.
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Abstract
A Method and apparatus for control of switch mode power supplies utilizing magnetic and capacitive conversion means are disclosed. The switch mode power supply is efficient and generates very small inductor current ripple and output voltage ripple. The switch mode power supply has a wider bandwidth and the filter components including magnetic storage element and the output capacitor can be made much smaller. The capacitor voltages in the switched capacitor array are regulated by changing the amount of time the inductor current passes through them.
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Citations
15 Claims
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1. A power supply comprising:
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a switched capacitor array comprising of switches and capacitors; a first terminal of the switched capacitor array coupled to a first terminal of a magnetic storage element; wherein the capacitors in the switched capacitor array are charged and discharged with a current flowing through the magnetic storage element; wherein voltages on the capacitors in the switched capacitor array are regulated by changing a time duration of the current flowing through the capacitors in the switched capacitor array; wherein the time duration is changed repetitively in steady state of operation by changing a time position of a leading edge of a first signal which turns on a first switch in the switched capacitor array wherein the turning on of the first switch in the switched capacitor array causes current in the magnetic storage element to increase. - View Dependent Claims (2, 3, 4)
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5. A step-down power supply comprising:
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a switched capacitor array comprising of switches and capacitors; a first terminal of the switched capacitor array coupled to a first terminal of a magnetic storage element; a second terminal of the switched capacitor array coupled to an input of the step-down power supply; a second terminal of the magnetic storage element coupled to an output of the step-down power supply; wherein the capacitors in the switched capacitor array are charged and discharged with a current flowing through the magnetic storage element; wherein voltages on the capacitors in the switched capacitor array are regulated by changing a time duration of a current flowing through the capacitors in the switched capacitor array; wherein the time duration is changed repetitively in steady state of operation by changing a time position of a leading edge of a first signal which turns on a first switch in the switched capacitor array wherein the turning on of the first switch in the switched capacitor array causes current in the magnetic storage element to increase. - View Dependent Claims (6, 7, 8)
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9. A step-up power supply comprising:
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a switched capacitor array comprising of switches and capacitors; a first terminal of the switched capacitor array coupled to a first terminal of a magnetic storage element; a second terminal of the switched capacitor array coupled to an output of the step-up power supply; a second terminal of the magnetic storage element coupled to an input of the step-up power supply; wherein the capacitors in the switched capacitor array are charged and discharged with a current flowing through the magnetic storage element; wherein voltages on the capacitors in the switched capacitor array are regulated by changing a time duration of a current flowing through the capacitors in the switched capacitor array; wherein the time duration is changed repetitively in steady state of operation by changing a time position of a leading edge of a first signal which turns on a first switch in the switched capacitor array wherein the turning on of the first switch in the switched capacitor array causes current in the magnetic storage element to increase. - View Dependent Claims (10, 11, 12)
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13. A bidirectional power supply having a power supply output voltage, the bidirectional power supply comprising:
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a switched capacitor array comprising of switches and capacitors; a first terminal of the switched capacitor array coupled to a first terminal of a magnetic storage element; wherein a control bit selects a direction of power conversion; wherein the capacitors in the switched capacitor array are charged and discharged with a current flowing through the magnetic storage element; wherein voltages on the capacitors in the switched capacitor array are regulated by changing a time duration of a current flowing through the capacitors in the switched capacitor array; wherein the time duration is changed repetitively in steady state of operation by changing a time position of a leading edge of a first signal which turns on a first switch in the switched capacitor array wherein the turning on of the first switch in the switched capacitor array causes current in the magnetic storage element to increase. - View Dependent Claims (14, 15)
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Specification