CIRCUIT AND METHOD FOR DRIVING SPINDLE MOTOR, AND DEVICE AND METHOD FOR DRIVING MAGNETIC DISK

摘要

A circuit and a method for driving a spindle motor capable of driving the spindle motor by a device having a suppressed structural scale in a driving mode or a driving characteristic optimum for the commands from a host system or types of an application in use; and a device and a method for driving a magnetic disk, wherein a driving is allowed by a spindle motor drive circuit (1) in a drive mode suitable for an application by switching between a drive mode where the spindle motor (9) is driven by a drive system switching means (2) in the spindle motor drive circuit (1) in a pulse width modulation driving mode by a pulse width modulation driving means (5) according to a command from the host system (10) and a drive mode where the spindle motor (9) is driven by a linear driving means (6) in a linear driving mode.