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Buffer battery power supply system

  • US 6,326,771 B1
  • Filed: 10/16/2000
  • Issued: 12/04/2001
  • Est. Priority Date: 03/08/1999
  • Status: Expired due to Term
First Claim
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1. A power supply system, comprising a charger circuit for generating a duty cycle for delivering power to an active system and a battery;

  • a first feedback loop to sense the total output current generated by the charger circuit and a second feedback loop to sense the current delivered to said battery by said charger circuit; and

    a battery switch circuit adapted to decouple said battery from said active system when said battery voltage is less than the minimum voltage required to power said active system, and couple said battery to said charger circuit to receive a charging current;

    said first and second feedback loops including error circuits for generating an error signal to said charger circuit, wherein said charger circuit adjusting said duty cycle for adjusting the total output current delivered to the active system and the battery based on the value of said error signal.

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