M54671SP Datasheet, PDF (1/5 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

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 3
Bootstrap power
supply(1)
Vbs1 4
Output power
supply(1)
VMM1
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
31
GND
C2
Comparator input(2)
18
26
T2
E2
Current sensor(2)
One-shot-multi time constant(2)
8 9 10
2
GND
C1
Comparator input(1)
15
7
T1
E1
Current sensor(1)
One-shot-multi time constant(1)