Load sharing across multiple voltage supplies
First Claim
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1. A method for sharing power load across a plurality of voltage supplies to a peripheral device, the method comprising steps of:
- monitoring a current utilized by the peripheral device from a first voltage supply of the plurality of voltage supplies;
if the current utilized by the peripheral device from the first voltage supply is greater than a first threshold, supplementing the current from the first voltage supply with current from a second voltage supply of the plurality of voltage supplies by converting the voltage of the second voltage supply to the voltage of the first voltage supply;
monitoring a total current utilized by the peripheral device from the second voltage supply; and
if the total current utilized by the peripheral device from the second voltage supply is greater than a second threshold, limiting the supplementation of the current from the first voltage supply with the current from the second voltage supply.
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Abstract
Methods and apparatuses for sharing power load across multiple input supplies in a peripheral device. Current utilized by the peripheral device from a first voltage supply is monitored and if the current exceeds a first threshold, a voltage converter is utilized to supplement the current from the first voltage supply with current from a second voltage supply up to a maximum total current threshold for the second voltage supply.
23 Citations
17 Claims
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1. A method for sharing power load across a plurality of voltage supplies to a peripheral device, the method comprising steps of:
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monitoring a current utilized by the peripheral device from a first voltage supply of the plurality of voltage supplies; if the current utilized by the peripheral device from the first voltage supply is greater than a first threshold, supplementing the current from the first voltage supply with current from a second voltage supply of the plurality of voltage supplies by converting the voltage of the second voltage supply to the voltage of the first voltage supply; monitoring a total current utilized by the peripheral device from the second voltage supply; and if the total current utilized by the peripheral device from the second voltage supply is greater than a second threshold, limiting the supplementation of the current from the first voltage supply with the current from the second voltage supply. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for sharing power load across a plurality of voltage supplies in a peripheral device, the apparatus comprising:
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a first current sense component configured to sense a current utilized by the peripheral device from a first voltage supply of the plurality of voltage supplies; a voltage converter configured to convert voltage of a second voltage supply of the plurality of voltage supplies to the voltage of the first voltage supply; a current controller configured to monitor the current utilized by the peripheral device from the first voltage supply, and if the current utilized by the peripheral device from a first voltage supply exceeds a first threshold, drive the voltage converter to supplement the current from the first voltage supply with current from the second voltage supply; a second current sense component configured to sense a total current utilized by the peripheral device from the second voltage supply; and a current limiting component configured to monitor the total current total current utilized by the peripheral device from the second voltage supply, and if the total current utilized by the peripheral device from the second voltage supply exceeds a second threshold, cause the current controller to limit the supplementation of the current from the first voltage supply with the current from the second voltage supply. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A hard disk drive (“
- HDD”
) apparatus comprising;a power connector connecting the HDD apparatus to a host device and providing a plurality of voltage supplies from the host device to the HDD apparatus; a first set of components of the HDD apparatus configured to draw power from a first voltage supply of the plurality of voltage supplies; a second set of components of the HDD apparatus configured to draw power from a second voltage supply of the plurality of voltage supplies; and a load sharing module interposed between the plurality of voltage supplies and the first and second set of components, the load sharing module configured to monitor a current utilized by the first set of components from the first voltage supply, if the current utilized by the first set of components from the first voltage supply is greater than a first threshold, supplementing the current from the first voltage supply with current from the second voltage supply by converting the voltage of the second voltage supply to the voltage of the first voltage supply, monitor a total current utilized by the first and second set of components from the second voltage supply, and if the total current from the second voltage supply is greater than a second threshold, limit the supplementation of the current from the first voltage supply with the current from the second voltage supply. - View Dependent Claims (15, 16, 17)
- HDD”
Specification