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Charge consumption monitor for electronic device

  • US 20050275382A1
  • Filed: 06/09/2004
  • Published: 12/15/2005
  • Est. Priority Date: 06/09/2004
  • Status: Abandoned Application
First Claim
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1. A method for measuring charge consumption in a battery-powered electronic device having an inductive switching voltage regulator, wherein the inductive switching regulator alternately stores and discharges energy in an inductor in a two-phase power conversion cycle, the power conversion phases designated as fill and dump phases, respectively, such that the inductor current increases until a predetermined peak current value is reached during the fill phase and decreases to zero or other predetermined value during the dump phase, comprising:

  • measuring the duration of a power conversion phase during a power conversion cycle; and

    , calculating the quantity of charge consumed during the power conversion cycle as the duration of the power conversion phase multiplied by one-half the peak inductor current.

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