| 摘要 |
<P>PROBLEM TO BE SOLVED: To supply a driving current to a driving coil independently of an operation of a restraint protection circuit in a period where a power supply voltage is lower than a predetermined voltage in the case that the power supply voltage of the driving circuit rises. <P>SOLUTION: A motor driving circuit has: a driving circuit that supplies a driving current to a driving coil of a motor; a control circuit that controls an operation of the driving circuit; a restraint protection circuit that controls an operation of the control circuit so that the driving circuit stops supplying the driving current to the driving coil when a rotation signal indicating motor rotation is not generated for a predetermined period even though the driving circuit is supplying the driving current to the driving coil; and a prohibition circuit that prohibits the control of the restraint protection circuit to the control circuit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
