LOW CURRENT DC-DC CONVERTER WITH INTEGRATED LOW CURRENT COULOMB COUNTER
First Claim
1. A power supply system having an input node and an output node, comprising:
- a regulator circuit responsive to an input signal at the input node for producing an output signal at the output node at a desired level, and having a controller, an inductive element and a first switch coupled to the inductor element and controlled by the controller to produce the output signal, anda Coulomb counter for producing a Coulomb count signal proportional to the number of Coulombs passing from the input node to the output node, the Coulomb counter being enabled by an enabling signal representing a predetermined time period, for determining the number of Coulombs passing from the input node to the output node during the predetermined time period.
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Accused Products
Abstract
A power supply system includes a regulator circuit responsive to an input signal at the input node for producing an output signal at the output node at a desired level. The regulator circuit has a controller, an inductive element and a first switch coupled to the inductor element and controlled by the controller to produce the output signal. Also, the power supply system includes a Coulomb counter for producing a Coulomb count signal proportional to the number of Coulombs passing from the input node to the output node. The Coulomb counter is enabled by an enabling signal representing a predetermined time period, for determining the number of Coulombs passing from the input node to the output node during that predetermined time period.
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Citations
18 Claims
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1. A power supply system having an input node and an output node, comprising:
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a regulator circuit responsive to an input signal at the input node for producing an output signal at the output node at a desired level, and having a controller, an inductive element and a first switch coupled to the inductor element and controlled by the controller to produce the output signal, and a Coulomb counter for producing a Coulomb count signal proportional to the number of Coulombs passing from the input node to the output node, the Coulomb counter being enabled by an enabling signal representing a predetermined time period, for determining the number of Coulombs passing from the input node to the output node during the predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of supplying power from an input node to an output node, comprising the steps of:
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in response to an input signal at the input node, producing an output signal at an output node at a desired level, determining the number of Coulombs passing from the input node to the output node during a predetermined time period to produce a measurement value representing the number of Coulombs per the predetermined time period, and accumulating measurement values determined during a number of predetermined time periods to produce a Coulomb count signal representing the total number of Coulombs transferred from the input node to the output node. - View Dependent Claims (16, 17, 18)
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Specification