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CRADLE CHARGER CONTROLLER WITH BELOW GROUND LEVEL BIASING

  • US 20080252252A1
  • Filed: 09/17/2007
  • Published: 10/16/2008
  • Est. Priority Date: 04/13/2007
  • Status: Active Grant
First Claim
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1. A cradle charging system, comprising:

  • a charging cradle defining a space for receiving a battery of an electronic device;

    a transformer charging circuitry for charging the battery in the electronic device, the transformer charging circuitry further comprising;

    primary side circuitry for receiving a charging voltage;

    secondary side circuitry for inductively coupling the charging voltage to the battery, wherein the secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery, wherein the secondary side circuitry has a negative voltage for a ground reference.

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