Motor drive circuit, motor system, and electric device

A motor drive circuit, comprising:

• a PWM signal generation part configured to generate a PWM signal based on a count value of a counter;
• a detection part configured to detect a zero crossing of a counter electromotive voltage generated in a coil of a motor;
• a prediction part configured to predict an arrival timing of the zero crossing of the counter electromotive voltage;
• a stop part configured to stop a counting operation of the counter after a time point at which the count value reaches a predetermined value, during a predetermined time period after a time point going back from the arrival timing predicted by the prediction part;
• and
• a reset part configured to reset the count value at a timing at which the detection part detects the zero crossing of the counter electromotive voltage.