Multi-primary transformer charging circuits for implantable medical devices
First Claim
Patent Images
1. An implantable medical device, comprising:
- a transformer having;
a magnetic core;
a plurality of primary windings wound around the core comprising at least a first primary winding and a second primary winding; and
a plurality of secondary windings wound around the core and magnetically coupled to the primary windings;
a power source having at least a first cell and a second cell, the first cell being coupled to the first primary winding defining a first current path between the first cell and the transformer and the second cell being coupled to the second primary winding defining a second current path between the second cell and the transformer;
a first switching element coupled along the first current path;
a second switching element coupled along the second current path;
a plurality of capacitors coupled in a series configuration, wherein each of the plurality of capacitors is coupled to a single winding of the plurality of secondary windings; 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 transformer.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device includes a low-power circuit and a multi-cell power source. The cells of the power source are coupled to a transformer in a parallel configuration. The transformer includes multiple secondary windings and each of the windings is coupled to a capacitor that stores energy for delivery of a therapy to a patient. In accordance with embodiments of this disclosure, the low power circuit is configured to control simultaneous delivery of energy from each of the cells to a plurality of capacitors through the transformer.
-
Citations
23 Claims
-
1. An implantable medical device, comprising:
-
a transformer having; a magnetic core; a plurality of primary windings wound around the core comprising at least a first primary winding and a second primary winding; and a plurality of secondary windings wound around the core and magnetically coupled to the primary windings; a power source having at least a first cell and a second cell, the first cell being coupled to the first primary winding defining a first current path between the first cell and the transformer and the second cell being coupled to the second primary winding defining a second current path between the second cell and the transformer; a first switching element coupled along the first current path; a second switching element coupled along the second current path; a plurality of capacitors coupled in a series configuration, wherein each of the plurality of capacitors is coupled to a single winding of the plurality of secondary windings; 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 transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification