Hot plug device providing turn on FETs with a softstart capability
AssigneeInternational Business Machines Corporation
InventorsJamaica L. Barnette, Nicholas Celenza, Brian C. Totten
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Abstract
A method of controlling the inrush current to a hot plug device. The method includes directing current from an input power rail of the hot plug device to an output power rail of the hot plug device through a high impedance auxiliary current path, wherein an electronic subsystem of the hot plug device is coupled to the output power rail. The method further includes allowing current from the input power rail to pass through a plurality of main turn on FETs to the output power rail in response to the output power rail having a voltage that exceeds a voltage threshold as a result of directing current through the high impedance auxiliary current path.
Claims8
A method of controlling the inrush current to a hot plug device, comprising:
- directing current from an input power rail of the hot plug device to an output power rail of the hot plug device through a high impedance auxiliary current path, wherein an electronic subsystem of the hot plug device is coupled to the output power rail;
- and
- allowing current from the input power rail to pass through a plurality of main turn on FETs to the output power rail in response to the output power rail having a voltage that exceeds a voltage threshold as a result of directing current through the high impedance auxiliary current path.
Dependencies are inferred from the claim text.