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Efficient external charger for an implantable medical device optimized for fast charging and constrained by an implant power dissipation limit

  • US 8,744,592 B2
  • Filed: 10/08/2009
  • Issued: 06/03/2014
  • Est. Priority Date: 10/08/2009
  • Status: Active Grant
First Claim
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1. A method for charging a battery in an implantable medical device, comprising:

  • generating a magnetic charging field using an external charger, the magnetic charging field for producing a battery charging current in the implantable medical device during a charging session;

    periodically measuring during the charging session a parameter in the implantable medical device;

    periodically telemetering during the charging session the parameter to the external charger; and

    periodically adjusting during the charging session in accordance with the parameter;

    (1) an intensity of the magnetic charging field to maximize an average battery charging current, and (2) a duty cycle of the magnetic charging field in accordance with a maximum power dissipation limit for the implantable medical device.

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