M54671SP Mitsubishi Electronics America, Inc., M54671SP Datasheet - Page 5

• Manufacturer Part Number: M54671SP
• Description: 2-phase Stepper Motor Driver
• Manufacturer: Mitsubishi Electronics America, Inc.

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
(3) When the supply voltage changes by a large margin, the
(4) Thermal shutdown function
(5) Flywheel
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.
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.
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.
Flywheel diode is not built in this IC. Before use, connect a
flywheel diode between each output (M
and output power supply (V
EXAMPLE.)
MM
). (Refer to APPLICATION
A
1, M
B
1, M
A
2, and M
B
2)
2-PHASE STEPPER MOTOR DRIVER
MITSUBISHI <CONTROL / DRIVER IC>
M54671SP