Voltage compatible charge pump buck and buck power supplies
First Claim
1. Circuitry comprising:
- a charge pump buck power supply comprising a charge pump buck converter having a first output inductance node, a first inductive element, an energy storage element, and a plurality of shunt pump buck switching elements coupled in series between the first output inductance node and ground, such that the first inductive element is coupled between the first output inductance node and the energy storage element; and
a buck power supply comprising a buck converter having a second output inductance node, a plurality of shunt buck switching elements coupled in series between the second output inductance node and ground, and the energy storage element, such that the charge pump buck power supply and the buck power supply share the energy storage element.
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Accused Products
Abstract
The present disclosure relates to a flexible direct current (DC)-DC converter, which includes a charge pump buck power supply and a buck power supply. The charge pump buck power supply and the buck power supply are voltage compatible with one another at respective output inductance nodes to provide flexibility. In one embodiment of the DC-DC converter, capacitances at the output inductance nodes are at least partially isolated from one another by using at least an isolating inductive element between the output inductance nodes to increase efficiency. In an alternate embodiment of the DC-DC converter, the output inductance nodes are coupled to one another, such that the charge pump buck power supply and the buck power supply share a first inductive element, thereby eliminating the isolating inductive element, which reduces size and cost but may also reduce efficiency.
309 Citations
27 Claims
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1. Circuitry comprising:
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a charge pump buck power supply comprising a charge pump buck converter having a first output inductance node, a first inductive element, an energy storage element, and a plurality of shunt pump buck switching elements coupled in series between the first output inductance node and ground, such that the first inductive element is coupled between the first output inductance node and the energy storage element; and a buck power supply comprising a buck converter having a second output inductance node, a plurality of shunt buck switching elements coupled in series between the second output inductance node and ground, and the energy storage element, such that the charge pump buck power supply and the buck power supply share the energy storage element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method comprising:
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providing a charge pump buck power supply comprising a charge pump buck converter having a first output inductance node, a first inductive element, an energy storage element, and a plurality of shunt pump buck switching elements coupled in series between the first output inductance node and ground, such that the first inductive element is coupled between the first output inductance node and the energy storage element; providing a buck power supply comprising a buck converter having a second output inductance node, a plurality of shunt buck switching elements coupled in series between the second output inductance node and ground, and the energy storage element, such that the charge pump buck power supply and the buck power supply share the energy storage element; during a first converter operating mode, receiving and converting a direct current (DC) power supply signal from a DC power supply using the charge pump buck power supply to provide a first switching power supply output signal to a load based on a setpoint; and during a second converter operating mode, receiving and converting the DC power supply signal from the DC power supply using the buck power supply to provide the first switching power supply output signal to the load based on the setpoint, wherein the setpoint is based on a desired voltage of the first switching power supply output signal.
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Specification