Thermal performance of an integrated amplifier in a disc drive
AssigneeSeagate Technology LLC
InventorsGarry E. Korbel, Ranjeet K. Pancholy, Hakam D. Hussein
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Abstract
An apparatus and associated method used to control a disc drive having at least one disc and a transducer positionable relative to the disc by a motor. The motor receives energization through at least one power switch integrated on a semiconductor circuit. Temperature of the circuit is sensed proximate the power switch. A temperature signal is provided which is indicative of whether the sensed temperature meets one of a plurality of different threshold temperatures. The power switch is controlled in one of a plurality of different control modes based upon the temperature signal.
Claims20
A method of controlling a data storage device having at least one storage surface and a transducer positionable relative to the storage surface by a motor, the motor receiving energization through at least one power switch integrated on a semiconductor circuit, the method comprising:
- (a) sensing temperature of the circuit proximate the power switch;
- (b) providing a temperature signal indicative of whether the circuit temperature meets one of a plurality of different threshold temperatures;
- and
- (c) controlling the power switch in one of a plurality of different control modes based on the temperature signal.
A data storage device comprising a transducer and a storage surface operably controlled in a data reading and writing relationship by a servo system, the servo system including a motor energized by a power switch, which is integrated on a semiconductor switch control circuit, the motor positioning the transducer relative the the storage surface according to a seek profile, the controller controlling the servo system by a method comprising:
- (a) sensing a switch temperature of the semiconductor switch control circuit proximate the power switch;
- (b) as the switch temperature increases to meet each of a plurality of different temperature thresholds, changing the seek profile to a selected one of a plurality of different seek profiles to reduce power dissipated by the servo system;
- and
- (c) controlling positioning of the transducer relative to the storage surface according to the selected seek profile.
A servo system in a data storage device, comprising:
- a transducer;
- means for positioning the transducer;
- and
- integrated power switch means for energizing the means for positioning and selectively reducing power dissipated by the servo system in response to a sensed temperature proximate the integrated power switch means.
Dependencies are inferred from the claim text.