LOCK PROTECTIVE CIRCUIT OF MOTOR AND INTEGRATED CIRCUIT, AND METHOD FOR PROTECTING LOCK OF MOTOR

摘要

PPROBLEM TO BE SOLVED: To provide the lock protective circuit of a motor which can reduce a circuit area and cost since an external capacitor is not used and to provide an integrated circuit. PSOLUTION: The lock protective circuit includes a starting pulse output circuit for outputting a starting pulse in a locked state in which the motor with current supplied to a drive coil is stopped, a starting pulse measuring means for counting the starting pulses, a lock state detecting means for detecting the lock state in response to the counted result, and a drive coil current interruption control means for performing a control for cutting off the current to the drive coil when the lock state is detected. PCOPYRIGHT: (C)2005,JPO&NCIPI