Multiple transformer charging circuits for implantable medical devices
First Claim
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1. An implantable medical device, comprising:
- a first transformer comprising;
a first magnetic core;
a first primary winding disposed around the core; and
a first plurality of secondary windings disposed around the first core and magnetically coupled to the first primary winding;
a second transformer comprising;
a second magnetic core;
a second primary winding disposed around the second core; and
a second plurality of secondary windings disposed around the second core and magnetically coupled to the second primary winding;
a power source comprising at least a first cell and a second cell, the first cell being coupled to the first primary winding and the second cell being coupled to the second primary winding;
a plurality of capacitors including;
a first set of capacitors coupled in a series configuration, wherein each capacitor of the first set of capacitors is coupled across only one secondary winding of the first plurality of secondary windings; and
a second set of capacitors coupled in a series configuration, wherein each capacitor of the second set of capacitors is coupled across only one secondary winding of the second plurality of secondary windings, wherein the first set of capacitors and the second set of capacitors are always connected together in a series configuration; and
a low power circuit coupled to the power source for controlling the delivery of charge from the power source to the plurality of capacitors through the first and second transformers.
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Abstract
An implantable medical device includes a low-power circuit, a high-power circuit, and a dual-cell power source. The power source is coupled to a dual-transformer such that each cell is connected to only one of the transformers. Each transformer includes multiple windings and each of the windings is coupled to a capacitor, and the capacitors are all connected in a series configuration. The low power circuit is coupled to the power source and issues a control signal to control the delivery of charge from the power source to the plurality of capacitors through the first and second transformers.
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Citations
21 Claims
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1. An implantable medical device, comprising:
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a first transformer comprising; a first magnetic core; a first primary winding disposed around the core; and a first plurality of secondary windings disposed around the first core and magnetically coupled to the first primary winding; a second transformer comprising; a second magnetic core; a second primary winding disposed around the second core; and a second plurality of secondary windings disposed around the second core and magnetically coupled to the second primary winding; a power source comprising at least a first cell and a second cell, the first cell being coupled to the first primary winding and the second cell being coupled to the second primary winding; a plurality of capacitors including; a first set of capacitors coupled in a series configuration, wherein each capacitor of the first set of capacitors is coupled across only one secondary winding of the first plurality of secondary windings; and a second set of capacitors coupled in a series configuration, wherein each capacitor of the second set of capacitors is coupled across only one secondary winding of the second plurality of secondary windings, wherein the first set of capacitors and the second set of capacitors are always connected together in a series configuration; and a low power circuit coupled to the power source for controlling the delivery of charge from the power source to the plurality of capacitors through the first and second transformers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification