POWER SUPPLY WITH A MAGNETICALLY UNCOUPLED PHASE AND AN ODD NUMBER OF MAGNETICALLY COUPLED PHASES, AND CONTROL FOR A POWER SUPPLY WITH MAGNETICALLY COUPLED AND MAGNETICALLY UNCOUPLED PHASES
First Claim
1. A power supply, comprising:
- an input node operable to receive an input voltage;
an output node operable to provide a regulated output voltage;
an odd number of magnetically coupled phase paths each coupled between the input and output nodes; and
a first magnetically uncoupled phase path coupled between the input and output nodes.
3 Assignments
0 Petitions
Accused Products
Abstract
An embodiment of a power supply includes an input node operable to receive an input voltage, an output node operable to provide a regulated output voltage, an odd number of magnetically coupled phase paths each coupled between the input and output nodes, and a first magnetically uncoupled phase path coupled between the input and output nodes. Such a power supply may improve its efficiency by activating different combinations of the coupled and uncoupled phase paths depending on the load conditions. For example, the power supply may activate only an uncoupled phase path during light-load conditions, may activate only coupled phase paths during moderate-load conditions, and may activate both coupled and uncoupled phase paths during heavy-load conditions and during a step-up load transient.
-
Citations
37 Claims
-
1. A power supply, comprising:
-
an input node operable to receive an input voltage; an output node operable to provide a regulated output voltage; an odd number of magnetically coupled phase paths each coupled between the input and output nodes; and a first magnetically uncoupled phase path coupled between the input and output nodes. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A system, comprising:
-
a power supply, comprising an input node operable to receive an input voltage, an output node operable to provide a regulated output voltage, an odd number of magnetically coupled phase paths each coupled between the input and output nodes, a magnetically uncoupled phase path coupled between the input and output nodes, and a power-supply controller coupled to and operable to activate the magnetically coupled and uncoupled phase paths; and a load coupled to the output node of the power supply. - View Dependent Claims (7, 8, 9)
-
-
10. A method, comprising:
-
activating each of an odd number of magnetically coupled phase paths at respective first frequencies; and activating a first magnetically uncoupled phase path a second frequency. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A power-supply controller, comprising:
-
a phase controller operable to enable a first number of magnetically uncoupled phase paths in response to a load current having a first relationship to a first threshold level, and to enable a second number of magnetically coupled phase paths in response to the load current having a second relationship to the first threshold level; and a load-current monitor coupled to the phase controller, operable to be coupled to the magnetically uncoupled and coupled phase paths, and operable to determine the load current. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A power supply, comprising:
-
an input node operable to receive an input voltage; an output node operable to provide a regulated output voltage and a load current; a first number of magnetically uncoupled phase paths coupled between the input and output nodes, each of the first number of phase paths operable, when active, to provide a respective portion of the load current; a second number of magnetically coupled phase paths coupled between the input and output nodes, each of the second number of the phase paths operable, when active, to provide a respective portion of the load current; and a power-supply controller coupled to the first number of the magnetically uncoupled phase paths and to the second number of the magnetically uncoupled phase paths, the power-supply controller comprising a phase controller operable to enable the first number of magnetically uncoupled phase paths in response to the load current having a first relationship to a first threshold level, and to enable the second number of magnetically coupled phase paths in response to the load current having a second relationship to the first threshold level, and a load-current monitor coupled to the phase controller and to the magnetically uncoupled and coupled phase paths, and operable to determine the load current.
-
-
26. A system, comprising:
-
a power supply, comprising an input node operable to receive an input voltage, an output node operable to provide a regulated output voltage and a load current, a first number of magnetically uncoupled phase paths coupled between the input and output nodes, each of the first number of phase paths operable, when active, to provide a respective portion of the load current, a second number of magnetically coupled phase paths coupled between the input and output nodes, each of the second number of the phase paths operable, when active, to provide a respective portion of the load current, and a power-supply controller coupled to the first number of the magnetically uncoupled phase paths and to the second number of the magnetically uncoupled phase paths, the power-supply controller comprising a phase controller operable to enable the first number of magnetically uncoupled phase paths in response to the load current having a first relationship to a first threshold level, and to enable the second number of magnetically coupled phase paths in response to the load current having a second relationship to the first threshold level, and a load-current monitor coupled to the phase controller and to the magnetically uncoupled and coupled phase paths, and operable to determine the load current; and a load coupled to the output node. - View Dependent Claims (27, 28, 29)
-
-
30. A method, comprising:
-
enabling a magnetically uncoupled phase path in response to a load current having a first relationship to a first threshold level; and enabling a number of magnetically coupled phase paths in response to the load current having a second relationship to the first threshold level. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
-
Specification