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DRIVING CIRCUIT FOR STEPPING MOTOR, METHOD OF DRIVING STEPPING MOTOR, AND ELECTRONIC DEVICE USING THE SAME
DRIVING CIRCUIT FOR STEPPING MOTOR, METHOD OF DRIVING STEPPING MOTOR, AND ELECTRONIC DEVICE USING THE SAME
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机译:用于步进电动机的驱动电路,驱动步进电动机的方法以及使用该驱动电路的电子设备
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摘要
There is provided a driving circuit for a stepping motor, including: a counter electromotive force detection circuit configured to detect a counter electromotive force generated in a coil; a current value setting circuit configured to generate a current set value based on the counter electromotive force; a constant current chopper circuit configured to generate a pulse-modulated signal which is pulse-modulated so that a detected value of a coil current flowing through the coil approaches a target amount based on the current set value; and a logic circuit configured to control a bridge circuit connected to the coil according to the pulse-modulated signal, wherein the driving circuit is configured to output the current set value to outside or to access the current set value from the outside.
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