M54670P Datasheet, PDF (1/11 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

M54670P
2-Phase Stepper Motor Driver
REJ03F0045-0100Z
Rev.1.0
Sep.19.2003
Description
The M54670P is a semiconductor IC to drive a bipolar stepper motor directly by controlling the coil current with the
constant current method.
Features
• Wide operating voltage range (10 – 35V)
• Wide output current control range (20 – 800mA)
• Bipolar and constant current drive
• Built in flywheel
• Current level can be changed by steps or continuously.
• Built in a thermal shutdown circuit
Application
Office automation equipment such as printer, FDD, HDD, and FAX
Function
The M54670P 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 3 and 30).
The coil current value can be selected among four levels (0 to max.) by selecting the combination of three internal
comparators by logic input (pins 14, 15, 18 and 19). It also can be continuously controlled with VR pins (pins 2 and 31).
By selecting an I input pin among pins 14, 15, 18 or 19, the operation timing, 2-phase excitation, 1-2-phase excitation
or microstep, can be selected.
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.
Rev.1.0, Sep.19.2003, page 1 of 10