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Systems, methods and devices for backup power control in data storage devices

  • US 8,065,562 B2
  • Filed: 12/07/2009
  • Issued: 11/22/2011
  • Est. Priority Date: 06/26/2009
  • Status: Expired due to Fees
First Claim
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1. A backup power circuit for powering a data storage circuit in response to a power interruption, the circuit comprising:

  • a capacitive circuit configured to store and use capacitive energy for powering backup functions of the data storage circuit in response to a power interruption, and for powering a test load to test the capacitive circuit;

    a test circuit configured to detect operational characteristics of the capacitive circuit in response to the capacitive circuit powering the test load; and

    an adaptive control circuit configured to, in response to the detected operational characteristicsset the charge in the capacitive circuit to a backup threshold voltage for powering the backup functions of the data storage circuit, andset the charge in the capacitive circuit to a test threshold voltage for powering the test load during a test period, the test threshold voltage being higher than a backup threshold voltage needed by the capacitive circuit in order to power the backup functions during the test period.

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  • 6 Assignments
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