| 摘要 |
A motor-drive circuit includes: H-bridge circuits in a pair each including first-source and first-sink transistors, and second-source and second-sink transistors, wherein a motor coil connected between a connection point of the first-source and first-sink transistors and a connection point of the second-source and second-sink transistors; a current-detection circuit to detect a current flowing through the motor coil of each of the H-bridge circuits; an oscillation circuit; and a control circuit to control the H-bridge circuits so as to turn on the first-source and second-sink transistors of each of the H-bridge circuits at intervals of a predetermined period based on an oscillation signal, and turn off the second-sink transistor of each of the H-bridge circuits after a value of a current flowing through the motor coil of each of the circuits reaches a predetermined value, based on a detection result of the current-detection circuit. |
