APPARATUS, SYSTEM, AND METHOD FOR A LOW COST SELF-HEALING POWER SUPPLY
First Claim
1. A apparatus to regulate voltage, the apparatus comprising:
- a power supply that regulates a direct current (“
DC”
) regulated bus to maintain a regulated bus voltage under varying load conditions, the power supply comprisingat least one pulse-width modulated stage, each pulse-width modulated stage comprising at least two switches connected in parallel, each switch comprising a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse; and
a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value, wherein the pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage, the switching duty cycle comprising a signal to control a switch on and then off for a portion of a switching period.
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Accused Products
Abstract
An apparatus, system, and method are disclosed for a low cost self-healing power supply. The invention includes a power supply that regulates a direct current (“DC”) regulated bus to maintain a regulated bus voltage under varying load conditions. The power supply includes at least one pulse-width modulated stage, wherein each pulse-width modulated stage includes at least two switches connected in parallel. Each switch includes a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse.
The power supply also includes a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value. The pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage. The switching duty cycle includes a signal to control a switch on and then off for a portion of a switching period.
28 Citations
20 Claims
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1. A apparatus to regulate voltage, the apparatus comprising:
a power supply that regulates a direct current (“
DC”
) regulated bus to maintain a regulated bus voltage under varying load conditions, the power supply comprisingat least one pulse-width modulated stage, each pulse-width modulated stage comprising at least two switches connected in parallel, each switch comprising a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse; and a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value, wherein the pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage, the switching duty cycle comprising a signal to control a switch on and then off for a portion of a switching period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system to regulate voltage, the system comprising:
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one or more power supplies that regulate a direct current (“
DC”
) regulated bus to maintain a regulated bus voltage under varying load conditions, at least one power supply comprisingat least one pulse-width modulated stage, each pulse-width modulated stage comprising at least two switches connected in parallel, each switch comprising a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse; and a pulse-width modulator for each stage of the power supply that regulates the bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value, wherein the pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage, the switching duty cycle comprising a signal to control a switch on and then off for a portion of a switching period; an electronic device comprising the varying load; and the regulated bus being connected between the electronic device and the one or more power supplies, wherein the regulated bus delivers power from the one or more power supplies to the electronic device. - View Dependent Claims (13, 14, 15, 16)
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17. A computer program product comprising a computer readable medium having computer usable program code executable to perform operations for regulating voltage in a power supply, the operations of the computer program product comprising:
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sensing a controlled bus voltage of a stage within a power supply, the power supply comprising at least one pulse-width modulated stage, each pulse-width modulated stage comprising at least two switches connected in parallel, each switch comprising a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse; and a pulse-width modulator for each stage of the power supply that regulates the sensed controlled bus voltage that is controlled by the stage; wherein one of the one or more controlled buses comprises a direct current (“
DC”
) regulated bus regulated under varying load conditions of a load connected to the regulated bus; andadjusting a switching duty cycle by the pulse-width modulator of the stage to regulate the controlled bus voltage of the stage to a target value, wherein the pulse-width modulator for the stage provides a substantially identical switching duty cycle to each switch of the stages, the switching duty cycle comprising a signal to control a switch on and then off for a portion of a switching period. - View Dependent Claims (18, 19, 20)
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Specification