M54672SP Datasheet PDF

MITSUBISHI M54672SP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54672SP is a semiconductor IC ...

MITSUBISHI M54672SP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54672SP is a semiconductor IC to drive a stepper motor directly by controlling the coil current with the constant current method. PIN CONFIGURATION (TOP VIEW) Standby input (1) Comparator input (1) Comparator reference input (1) St1 1 C1 2 VR1 3 32 St2 31 C2 Standby input (2) Comparator input (2) Comparator reference 30 VR2 input (2) power 29 Vbs2 Bootstrap supply (2) Output power 28 VMM2 supply (2) FEATURES q Wide output current control range (20 – 1200mA) q Bipolar and constant current drive q Built in a thermal shutdown circuit q Built in flywheel diodes Bootstrap power supply (1) Vbs1 4 Output power supply (1) VMM1 5 Output (1) MA1 6 Current sensor (1) E1 7 27 MA2 Output (2) 26 E2 25 24 23 22 MB2 Output (2) 21 VMM2 Output power supply (2) 20 Vbs2 supply (2) Bootstrap power GND Current sensor (2) M54672SP 8 APPLICATION Office automation equipment such as printer, FDD, HDD and FAX GND 9 10 Output (1) MB1 11 FUNCTION The M54672SP can drive a stepper motor by the 2-phase bipolar method and also control the coil current. Furthermore, it controls the direction of the coil current with Ph input pins (pins 16 and 17) and the coil current value with VR pins (pins 3 and 30). Because two control circuits are built in this IC, a stepper motor can be driven with a single IC by the 2-phase bipolar method. Output power supply (1) VMM1 12 Bootstrap power supply (1) Vbs1 13 Power supp...