Sequencing power supplies on daughter boards
First Claim
Patent Images
1. A method of controlling a plurality of power supplies, comprising the steps of:
- controlling the plurality of power supplies in a predetermined sequence using a power supply controller on a mother board, the control being dependent upon output voltages of the power supplies monitored by the power supply controller;
providing at least one of the power supplies on a daughter board which can be connected to the mother board;
detecting whether or not the daughter board is connected to the mother board thereby to determine whether or not said at least one of the power supplies is present; and
over-riding the dependence of the control on a monitored output voltage of a power supply on the daughter board in response to detecting that the daughter board is not connected to the mother board.
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Accused Products
Abstract
Power supplies are enabled and disabled in sequence by a controller in dependence upon output voltages of the power supplies monitored by the controller. The controller allows proper sequencing of the power supplies when one or more of them is provided on a daughter board, when this is not connected to a mother board on which the controller is provided, by storing information as to any power supply provided on the daughter board, detecting when the daughter board is not connected to the mother board, and in that case enabling the power supplies in sequence independently of any monitored output voltage of such a power supply on the daughter board.
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Citations
18 Claims
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1. A method of controlling a plurality of power supplies, comprising the steps of:
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controlling the plurality of power supplies in a predetermined sequence using a power supply controller on a mother board, the control being dependent upon output voltages of the power supplies monitored by the power supply controller; providing at least one of the power supplies on a daughter board which can be connected to the mother board; detecting whether or not the daughter board is connected to the mother board thereby to determine whether or not said at least one of the power supplies is present; and over-riding the dependence of the control on a monitored output voltage of a power supply on the daughter board in response to detecting that the daughter board is not connected to the mother board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of enabling a plurality of power supplies in a predetermined power-up sequence, comprising the steps of:
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providing on a mother board a power supply controller for monitoring output voltages of the power supplies and for enabling the power supplies in said power-up sequence in dependence upon the monitored output voltages; providing at least one of the power supplies on a daughter board which can be connected to the mother board; detecting whether or not the daughter board is connected to the mother board thereby determine whether or not said at least one of the power supplies is present; and in response to detecting that the daughter board is not connected to the mother board, enabling the power supplies in said power-up sequence independently of a monitored output voltage of a power supply on the daughter board. - View Dependent Claims (12, 13, 14, 18)
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15. A method of enabling a plurality of power supplies in a predetermined power-up sequence, comprising the steps of:
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providing on a mother board a power supply controller for monitoring output voltages of the power supplies; providing at least one of the power supplies on a daughter board which can be connected to the mother board; and detecting whether or not the daughter board is connected to the mother board thereby to determine whether or not said at least one of the power supplies is present; wherein the power supply controller enables the power supplies in said power-up sequence in dependence upon the monitored output voltages of power supplies on the mother board, and in dependence upon the monitored output voltages of power supplies on the daughter board only in response to detecting that the daughter board is connected to the mother board. - View Dependent Claims (16, 17)
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Specification