| 摘要 |
In a motor driver furnished with a function of controlling the driving of a motor through negative feedback control of the current supplied to the coil of the motor, the motor driver permits the setting of a target value of the current that is negatively fed back, and sets the target value in such a way that the target value at a time point when the current starts being supplied to the coil of the motor is smaller than the target value after the current starts being supplied to the coil of the motor. This permits the current flowing through the coil to increase more gradually than in conventional circuit configurations in which the target value is fixed at the maximum value thereof before the current starts being supplied to the coil of the motor. Thus, it is possible to suppress overshooting and oscillation in the current flowing through the coil and oscillation in the voltage across the coil, and thereby reduce noise.
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