Claims
- 1. A disc drive, comprising:
a drive motor mechanically coupled to a disc; a voice coil motor mechanically coupled to a read/write head on the disc; a power integrated circuit electrically coupled to the drive motor and the voice coil motor, the power integrated circuit including multiple power semiconductor devices and an integrated temperature sensor providing a temperature output representing a temperature of the power integrated circuit; and a control circuit receiving the temperature output and providing a voice coil motor control output to the power integrated circuit as a function of the temperature output.
- 2. The disc drive of claim 1 wherein the temperature output comprises a continuous representation of the temperature.
- 3. The disc drive of claim 1 wherein the power integrated circuit comprises a semiconductor device generating an analog temperature signal.
- 4. The disc drive of claim 1, wherein the voice coil motor control output has an access speed and the control circuit adjusts the access speed based on the temperature output after completion of a current read/write cycle.
- 5. The disc drive of claim 1 wherein the power integrated circuit further generates a regulated voltage that couples to the control circuit.
- 6. The disc drive of claim 1, wherein the voice coil motor control output has an access speed and the control circuit performs an access speed adjustment when the temperature is above a selected temperature limit.
- 7. The disc drive of claim 6 wherein the control circuit incrementally decreases the access speed when the temperature is rising.
- 8. The disc drive of claim 6 wherein the control circuit incrementally increases the access speed when the temperature is not rising.
- 9. The disc drive of claim 6 wherein the access speed adjustment comprises a deceleration drive time adjustment.
- 10. The disc drive of claim 9 wherein the deceleration drive time adjustment adjusts linear deceleration drive time.
- 11. The disc drive of claim 9 wherein the deceleration drive time adjustment adjusts saturated deceleration drive time.
- 12. The disc drive of claim 6 wherein the access speed adjustment comprises an acceleration drive time adjustment.
- 13. A disc drive, comprising:
a control circuit providing a voice coil motor output with an access speed to a power integrated circuit coupled to a voice coil motor; and means for controlling the access speed as a function of a temperature of the power integrated circuit.
- 14. A method of controlling a disc drive having a drive motor mechanically coupled to a disc and a voice coil motor mechanically coupled to a read/write head on the disc, the method comprising:
electrically controlling the drive motor and the voice coil motor with a power integrated circuit; generating a temperature output representing a temperature of the power integrated circuit; and electrically controlling a power integrated circuit including multiple power semiconductor devices with a control circuit receiving the temperature output and providing a voice coil motor control output to the power integrated circuit as a function of the temperature output.
- 15. The method of claim 14 wherein the temperature output comprises a continuous representation of the temperature.
- 16. The method of claim 14, further comprising:
generating an analog temperature output with a semiconductor device in the power integrated circuit.
- 17. The method of claim 14, further comprising:
adjusting an access speed of the voice coil motor control output based on the temperature output after completion of a current read/write cycle.
- 18. The method of claim 14, further comprising:
providing a regulated voltage generated by the power integrated circuit.
- 19. The method of claim 14, further comprising performing an incremental access speed adjustment when the temperature is above a selected temperature limit.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority benefits from U.S. Provisional Application No. 60/269,144 titled “Method of Optimizing Thermal Performance of An Integrated Amplifier in a Disc Drive,” filed Feb. 15, 2001 and identified as Docket Number STL10127.01; this application also claims priority from Provisional Application Serial No. 60/271,302 titled “Method of limiting Temperature Rise in a Disc Drive Integrated Amplifier,” filed on Feb. 23, 2001 and identified as Docket Number STL10137.01; and reference is also made to related co-pending U.S. patent application Ser. No. ______ entitled “IMPROVING THERMAL PERFORMANCE OF AN INTEGRATED AMPLIFIER IN A DISC DRIVE,” filed on even date herewith.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60269144 |
Feb 2001 |
US |
|
60271302 |
Feb 2001 |
US |