Power source and power source control circuit
AssigneeMicron Technology, Inc.
InventorDouglas Todd Hayden
Life of this patent
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Abstract
Power sources, backup power circuits, power source control circuits, data storage devices, and methods relating to controlling application of power to a node are disclosed. An example power source includes an input, backup power source, and a backup power source control circuit. The input is configured to be coupled to a primary power source and further configured to couple the primary power source to the output when the input is coupled to the primary power source. The backup power source control circuit is configured to control a current path from the backup power source to the output based at least in part on a voltage applied to the input.
Claims19
An apparatus comprising:
- a first control circuit configured to couple a first power source to an output;
- and
- a second control circuit configured to couple a second power source to the output, wherein the second control circuit includes a first transistor and a second transistor coupled in series between the output and the second power source, the second control Circuit further including a resistive element coupled to a node between the first transistor and the second transistor, and the resistive element further coupled to a ground node.
An apparatus, comprising:
- a first transistor coupled to a first power source, wherein a gate of the first transistor is coupled to an input via a resistive element;
- a second transistor coupled in series with the first transistor and to an output, wherein the first transistor and the second transistor are configured to couple the first power source to the output responsive to the first power source being enabled;
- and
- a control circuit coupled to the output and to the first power source.
A method, comprising:
- enabling a first transistor and a second transistor responsive to a power source being enabled, wherein the first transistor is coupled in series with the second transistor;
- disabling a control circuit responsive to the power source being enabled;
- providing the power source to an output through the enabled first transistor and enabled second transistor;
- and
- discharging a node between the first transistor anal the second transistor to a reference via a resistive element responsive to the power source being disabled.
Dependencies are inferred from the claim text.