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PDF M54671SP Data sheet ( Hoja de datos )
| Número de pieza | M54671SP | |
| Descripción | 2-PHASE STEPPER MOTOR DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITSUBISHI <CONTROL / DRIVER IC>
M54671SP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54671SP is a semiconductor IC to drive a bipolar stepper
motor directly by controlling the coil current with the constant
current method.
FEATURES
q Wide output current control range (20 – 1200mA)
q Bipolar and constant current
q Built in a thermal shutdown circuit
APPLICATION
Office automation equipment such as printer, FDD, HDD, and FAX
FUNCTION
The M54671SP 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 16 and 17)
and the coil current value with VR pins (pins 3 and 30).
Because two control circuits are built in this IC, a stepping motor
can be driven with a single IC by the 2-phase bipolar method.
PIN CONFIGURATION (TOP VIEW)
Standby input(1) St1 1
32 St2 Standby input(2)
Comparator input(1) C1 2
Comparator
reference input(1)
VR1
Bootstrap power
supply(1)
Vbs1
Output power
supply(1)
VMM1
3
4
5
Output(1) MA1 6
31 C2 Comparator input(2)
30 VR2
Comparator reference
input(2)
29 Vbs2
Bootstrap power
supply(2)
28
VMM2
Output power
supply(2)
27 MA2 Output(2)
Current sensor(1) E1 7
26 E2 Current sensor(2)
8 25
GND
9
24 GND
10 23
Output(1) MB1 11
Output power
supply(1)
VMM1
12
Bootstrap power
supply(1)
Vbs1 13
Power supply(1) Vcc1 14
One-shot-multi time
constant(1)
Output current direction
switching(1)
T1 15
Ph1 16
22 MB2 Output(2)
21
VMM2
Output power
supply(2)
20 Vbs2
Bootstrap power
supply(2)
19 Vcc2 Power supply(2)
18 T2
17 Ph2
One-shot-multi time
constant(2)
Output current direction
switching(2)
Outline 32P4B
BLOCK DIAGRAM
32 30 17
29 28 27 22 21 20
1 3 16
4 5 6 11 12 13
19 14
Voltage sensor
Monostable
Standby circuit
comparator
Voltage sensor
Monostable
Standby circuit
comparator
25 24 23
GND
31
C2
Comparator input(2)
18 26
T2 E2
Current sensor(2)
One-shot-multi time constant(2)
8 9 10
GND
2
C1
Comparator input(1)
15 7
T1 E1
Current sensor(1)
One-shot-multi time constant(1)
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 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.)
MITSUBISHI <CONTROL / DRIVER IC>
M54671SP
2-PHASE STEPPER MOTOR DRIVER
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet M54671SP.PDF ] | |
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