Multiphase transformer for a multiphase DC-DC converter
First Claim
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1. A method comprising:
- providing a multiphase DC-DC converter including a multiphase transformer having a plurality of input voltage terminals coupled to directly-coupled inductors with equal number of windings, made on a common core, and a multiphase transformer output voltage terminal, wherein each input voltage terminal of the plurality is associated with a corresponding phase, and wherein all the directly-coupled inductors have positive mutual inductance for additive orientation; and
assigning non-sequentially each phase to an input voltage terminal of the plurality of input voltage terminals to reduce a ripple current at the input voltage terminals of the multiphase transformer, wherein the multiphase transformer output voltage terminal has a ripple current independent of the non-sequentially assigning of each phase.
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Abstract
A multiphase DC-DC converter is provided that includes a multiphase transformer, the multiphase transformer including a plurality of input voltage terminals and an transformer output voltage terminal, each input voltage terminal associated with a corresponding phase. Each phase is assigned to an input voltage terminal of the plurality of input voltage terminals to minimize a ripple current at the input voltage terminals of the multiphase transformer.
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Citations
22 Claims
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1. A method comprising:
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providing a multiphase DC-DC converter including a multiphase transformer having a plurality of input voltage terminals coupled to directly-coupled inductors with equal number of windings, made on a common core, and a multiphase transformer output voltage terminal, wherein each input voltage terminal of the plurality is associated with a corresponding phase, and wherein all the directly-coupled inductors have positive mutual inductance for additive orientation; and assigning non-sequentially each phase to an input voltage terminal of the plurality of input voltage terminals to reduce a ripple current at the input voltage terminals of the multiphase transformer, wherein the multiphase transformer output voltage terminal has a ripple current independent of the non-sequentially assigning of each phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multiphase DC-DC converter comprising:
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a multiphase transformer having directly-coupled inductors with equal number of windings made on a common core, wherein all the directly-coupled inductors have positive mutual inductance for additive orientation; a transformer output voltage terminal coupled to the multiphase transformer; and a plurality of input voltage terminals coupled to the directly-coupled inductors of the multiphase transformer, wherein a plurality of phases corresponding to a plurality of input voltages are assigned non-sequentially to the plurality of input voltage terminals, respectively, to reduce a ripple current at the input voltage terminals of the multiphase transformer, wherein the transformer output voltage terminal has a ripple current independent of the non-sequentially assigned plurality of phases. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An apparatus comprising:
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a multiphase transformer having directly-coupled inductors on a common core, wherein all the directly-coupled inductors have positive mutual inductance for additive orientation, and wherein the multiphase transformer includes a two-phase transformer for each phase of the multiphase transformer, the two-phase transformer arranged in a cyclic cascade topology; a plurality of input voltage terminals coupled to the directly-coupled inductors of the multiphase transformer; and a bridge coupled to the multiphase transformer, the bridge to assign non-sequentially a plurality of phases corresponding to a plurality of input voltages to the plurality of input voltage terminals respectively, wherein the multiphase transformer includes an output voltage terminal which has a ripple current independent of the non-sequentially assigning of the plurality of phases. - View Dependent Claims (20, 21)
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22. A method comprising:
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providing a multiphase DC-DC converter including a multiphase transformer having a plurality of input voltage terminals coupled to directly-coupled inductors on a common core, wherein all the directly-coupled inductors have positive mutual inductance for additive orientation, wherein each input voltage terminal of the plurality is associated with a corresponding phase, and wherein the multiphase transformer includes a two-phase transformer for each phase of the multiphase transformer, the two-phase transformer arranged in a cyclic cascade topology; and assigning non-sequentially each phase to an input voltage terminal of the plurality of input voltage terminals, wherein the multiphase transformer has an output voltage terminal which has a ripple current independent of the non-sequentially assigning of each phase.
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Specification