M54671SP datasheet(5/5 Pages) MITSUBISHI

Part #	M54671SP

Description	2-PHASE STEPPER MOTOR DRIVER

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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2-PHASE STEPPER MOTOR DRIVER

M54671SP

MITSUBISHI <CONTROL / DRIVER IC>

PRECAUTIONS FOR USE

(1) Before use, never forget to short-circuit Vcc1 and Vcc2.

(2) When the whole output current changes by a large margin (for

example, when thermal shutdown operation causes intermittent

flow of output current), the supply voltage may undergo a

change. Therefore, selection and wiring of power supply should

be conducted cautiously to avoid such a situation that the

supply voltage exceeds the absolute maximum ratings.

(3) When the supply voltage changes by a large margin, the

operation of this IC may become unstable. In this case, the

change of supply voltage can be controlled by connecting a

capacitor between Vcc pin and GND pin.

(4) Thermal shutdown function

The state of thermal shutdown operation may differ according

to the way of wiring within a board. Therefore, sufficient board

evaluation should be conducted before use.

When the board is changed, operation on the replacing board

should be evaluated.

The circuit board on which this IC is mounted is designed to

realize low impedance between power supply and output pin.

Therefore, it is desirable to take a safe measure such as fixing

a fuse to avoid such a situation that the board is damaged by a

fire when output pin is internally short-circuited by excessively

applied surge voltage by accident.

(5) Flywheel

Flywheel diode is not built in this IC. Before use, connect a

flywheel diode between each output (MA1, MB1, MA2, and MB2)

and output power supply (VMM). (Refer to APPLICATION

EXAMPLE.)

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