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PDF M54677FP Data sheet ( Hoja de datos )
| Número de pieza | M54677FP | |
| Descripción | 2-PHASE STEPPER MOTOR DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITSUBISHI <CONTROL / DRIVER IC>
M54677FP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54677FP is a semiconductor IC to drive a bipolar stepper
motor directly by controlling the coil current with the constant
current method.
FEATURES
qWide output current control range (20 – 1000mA)
qBipolar and constant current
qBuilt in a thermal shutdown circuit
qBuilt in flywheel diodes
APPLICATION
Office automation equipment such as printer, FDD, HDD, and FAX
FUNCTION
The M54677FP 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 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)
St1 1
C1 2
Vref1 3
VM11 4
MA1 5
E1 6
7
8
GND
9
10
11
12
N.C 13
MB1 14
VM12 15
Vcc1 16
T1 17
Ph1 18
36 St2
35 C2
34 Vref2
33 VM21
32 MA2
31 E2
30
29
28
GND
27
26
25
24 N.C
23 MB2
22 VM22
21 Vcc2
20 T2
19 Ph2
Outline 36P2R-D
N.C: no connection
BLOCK DIAGRAM
36 34
19
33 32 23 22
13
18
4 5 14 15
21
current
-comp mono-multi
+
–
–
+
–25 30
standby
-comp
35 20
GND
C2
T2
Buffer
31
E2
current
-comp mono-multi
+
–
–
+
–7 12
standby
-comp
2 17
GND
C1
T1
Buffer
6
E1
16
1 page  
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 excessive
surge voltage applied externally by accident.
MITSUBISHI <CONTROL / DRIVER IC>
M54677FP
2-PHASE STEPPER MOTOR DRIVER
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet M54677FP.PDF ] | |
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