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Hard disk drive (HDD) electrical over voltage stress (EOS) systems and methods

  • US 7,154,725 B2
  • Filed: 08/05/2004
  • Issued: 12/26/2006
  • Est. Priority Date: 12/12/2000
  • Status: Expired due to Term
First Claim
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1. An overvoltage protection circuit, comprising:

  • one or more hard disk drive integrated circuit chips residing on a board;

    a first voltage supply potential for supplying power to at least one of the one or more hard disk drive integrated circuit chips;

    a second voltage supply potential having an intended value which is less than the first voltage supply potential, the second voltage supply potential for supplying power to at least one of the one or more hard disk drive integrated circuit chips;

    a voltage detection circuit operable to detect a value of the second voltage supply potential; and

    a voltage reduction circuit operably coupled to the voltage detection circuit,wherein the voltage detection circuit is operable to activate the voltage reduction circuit when the second voltage supply potential exceeds a predetermined threshold, and wherein the voltage reduction circuit is operable to reduce a value of the second supply potential when activated by the voltage detection circuit.

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