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CHARGING CIRCUIT

  • US 20080042622A1
  • Filed: 08/17/2007
  • Published: 02/21/2008
  • Est. Priority Date: 08/18/2006
  • Status: Active Grant
First Claim
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1. A charging circuit for charging a rechargeable battery, comprising:

  • a changeover switch having a default state and a controlled state;

    a comparator configured for receiving a battery voltage from the rechargeable battery via the changeover switch when the changeover switch is at the default state, wherein the comparator compares the battery voltage with a preset voltage threshold and outputs a comparison result accordingly; and

    a charge management unit for receiving the comparison result and controlling the changeover switch to switch from the default state to the controlled state if the battery voltage is less than the preset voltage threshold according to the comparison result, wherein the charge management unit charges the rechargeable battery via the changeover switch when the changeover switch is at the controlled state.

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