M54676P Datasheet, PDF (1/5 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M54676P
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54676P is a semiconductor IC to drive a bipolar stepper
motor by the micro step method by changing the coil current of the
motor continuously.
FEATURES
qHighly-accurate micro step drive by chopping sink output
transistor and source output transistor simultaneously
qBipolar and constant current drive
qBuilt in a thermal shutdown circuit and standby circuits
qBuilt in flywheel diodes
APPLICATION
Office automation equipment such as printer and FAX
FUNCTION
The M54676P can drive a stepper motor by the 2-phase bipolar
method and also controls the coil current.
Furthermore, it controls the direction of the coil current by Ph input
and the coil current value by Vref pin.
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.
PIN CONFIGURATION (TOP VIEW)
OutA 1
Out ∗A 2
SG A 3
Sense A 4
GND 5
GND 6
Vref A 7
Phase A 8
Phase ∗A 9
Vcc5 10
20 VM
19 OutB
18 Out ∗B
17 SG B
16 GND
15 GND
14 Sense B
13 VrefB
12 PhaseB
11 Phase ∗B
Outline 20P4
BLOCK DIAGRAM
13 7
20
Vref A Amp _{Vref 2 comparator}
-
-
9KΩ _0.2V
-
1KΩ _Current
comparator
Vcc5 10
20KΩ
6KΩ
Vref B Amp
Vref 2
comparator
-
-
9KΩ _0.2V
1KΩ
-
Current
comparator
Internal TSD
bias
4 14
8 9 11 12 16 15 6 5
GND
12
17
3 SGA
19 OUT B
18 OUT ∗B