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METHODS AND APPARATUS FOR CHARGING A BATTERY IN A PERIPHERAL DEVICE

  • US 20100085011A1
  • Filed: 12/09/2009
  • Published: 04/08/2010
  • Est. Priority Date: 10/22/2001
  • Status: Active Grant
First Claim
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1. A power manager unit for managing power delivered to a battery powered device, comprising:

  • a main bus;

    an inrush current limiter, wherein the inrush current limiter limits current from a power line connected to the inrush current limiter;

    a voltage converter unit connected to the main bus and to the output of the inrush current limiter;

    a voltage sensor unit coupled to the main bus and arranged to sense a voltage on the main bus; and

    a switchover circuit arranged to, upon connection of a power line to the inrush current limiter-causing the voltage sensor unit to sense a voltage on the main bus above a predefined threshold, connect the voltage converter unit to the battery powered device, and upon detection that the battery is in a fully charged state, disconnect the battery from the voltage converter unit such that no current flows to or from the battery.

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