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Implantable infusion device having voltage boost circuit and selection circuit to alternately connect battery with charging circuit

  • US 9,555,188 B2
  • Filed: 04/27/2012
  • Issued: 01/31/2017
  • Est. Priority Date: 04/27/2012
  • Status: Active Grant
First Claim
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1. An implantable infusion control device comprising:

  • a charge storage unit;

    a pump actuator circuit configured to actuate a pump using energy from the charge storage unit;

    a voltage boost circuit configured to generate a boosted battery voltage from a battery voltage provided by a battery;

    a charging circuit configured to supply a current to the charge storage unit; and

    a selection circuit configured to alternately connect;

    the charging circuit to the battery voltage, bypassing the voltage boost circuit; and

    the charging circuit to the boosted battery voltage,wherein the selection circuit is configured to switch between the boosted battery voltage and the battery voltage in response to (i) a comparison of the battery voltage with a predetermined threshold and (ii) a comparison of a voltage of the charge storage unit with the battery voltage.

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