| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a disk device and to reduce a manufacturing cost. SOLUTION: A retracting circuit 13 receives a current by counter electromotive force from a spindle motor 2 and clips it to <= the prescribed value when +5 [V] power source or +12 [V] power source is turned off, and supplies this current of <= the prescribed value to a voice coil 5a of a VCM5. Thereby, the VCM5 drives a carriage, the carriage is rotated, and a head slider is retracted to a landing region of a disk. When a power source is turned off, a FET 3 is turned on, the current by counter electromotive force is supplied to the voice coil 5a through the FET3, a resistor R1, a FET2. When a current by counter electromotive force exceeds the prescribed value decided by a value of the resistor R1, a TR2, TR1 are turned on. Thereby, the FET2 is turned off, as a supply path of a current is cut off, a supply current is clipped to the prescribed value, therefore, rotation speed of the carriage is limited. |
