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US 7,023,718 B2Granted
Two-phase driver and driving method
AssigneeRichtek Technology Corporation
InventorsNan-Chuan Huang, Chean-Lung Tsay
Life of this patent
Estimating the term…
Abstract
A two-phase driver comprises two H-bridge circuits each of them including a transformer and two switch assemblies connected to the opposite terminals of the primary side of the transformer, in which one of the switch assemblies is shared by the two H-bridge circuits. Each of the switch assemblies includes a high-side switch and a low-side switch, and each of the high-side switch and low-side switch is switched by a respective signal so as to modulate the loading currents supplied to two loading loops connected to the two H-bridge circuits, respectively.
Claims22
A two-phase driver comprising:
- a first loading loop and a second loading loop, said first and second loading loops being individually operable one apart from the other;
- a first transformer having a primary side and a secondary side connected to said first loading loop;
- a second transformer having a primary side and a secondary side connected to said second load loop;
- a first switch assembly connected between an input voltage and a reference and including a first high-side switch connected between said input voltage and a first node connected to respective first terminals of said primary sides of said first and second transformers and a first low-side switch connected between said first node and reference;
- a second switch assembly connected between said input voltage and reference for forming a first H-bridge circuit in combination with said first switch assembly to thereby modulate a first current flowing through said primary side of said first transformer, said second switch assembly including a second high-side switch connected between said input voltage and a second node connected to a second terminal of said primary side of said first transformer and a second low-side switch connected between said second node and reference;
- and
- a third switch assembly connected between said input voltage and reference for forming a second H-bridge circuit in combination with said first switch assembly to thereby modulate a second current flowing through said primary side of said second transformer, said third switch assembly including a third high-side switch connected between said input voltage and a third node connected to a second terminal of said primary side of said second transformer and a third low-side switch connected between said third node and reference;
- wherein said high-side switches and low-side switches are switched by first to sixth signals, respectively.
5 more elements
A two-phase driver comprising:
- a first switch assembly, a second switch assembly, and a third switch assembly each connected between an input voltage and a reference;
- a first transformer connected between said first and second switch assembly for forming a first H-bridge circuit to thereby modulate a first current supplied for a first loading loop;
- and
- a second transformer connected between said first and third switch assembly for forming a second H-bridge circuit to thereby modulate a second current supplied for a second loading loop;
- said first and second loading loops being individually operable one apart from the other.
2 more elements
A two-phase driving method comprising the steps of:
- connecting a first switch assembly, a second switch assembly, and a third switch assembly each between an input voltage and a reference;
- connecting a first transformer between said first and second switch assemblies for forming a first H-bridge circuit to thereby modulate a first current supplied for a first loading loop;
- and
- connecting a second transformer between said first and third switch assemblies for forming a second H-bridge circuit to thereby modulate a second current supplied for a second loading loop;
- said first and second loading loops being individually operable one apart from the other.
2 more elements
A two-phase driving method comprising the steps of:
- modulating a first current for a first loading loop by a first H-bridge circuit including two switch assemblies;
- and
- modulating a second current for a second loading loop by a second H-bridge circuit including two switch assemblies;
- wherein one of said switch assemblies is shared by said first and second H-bridge circuits, and said first and second loading loops are individually operable one apart from the other.
1 more element
Dependencies are inferred from the claim text.