Mitsubishi M54671SP Datasheet
MITSUBISHI <CONTROL / DRIVER IC>
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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
● Wide output current control range (20 – 1200mA)
● Bipolar and constant current
● 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
Standb
input(1
Comparator input(1)
Comparator
reference input(1)
Bootstrap power
supply(1)
Output powe
supply(1)
Output(1)
Current sensor(1)
Output(1)
Output powe
supply(1)
Bootstrap power
supply(1)
Power supply(1)
One-shot-multi time
Output current direction
constant(1)
switching(1)
GND
St1
C1
VR1
V
bs1
VMM1
M
MB1
VMM1
bs1
V
Vcc1
Ph1
A1
E1
T1
1
2
3
4
32
31
30
29
285
6
7
8
27
M54671SP
26
25
249
10
23
2211
12
13
14
21
20
19
15 18
16
17
Outline 32P4B
S
t2
Standb
Comparator input(2)
C2
Comparator reference
V
R2
input(2)
Bootstrap power
Vbs2
supply(2)
Output power
VMM2
supply(2)
Output(2)
M
A2
Current sensor(2)
E2
GND
Output(2)
MB2
Output power
VMM2
supply(2)
Bootstrap power
V
bs2
supply(2)
Power supply(2)
Vcc2
One-shot-multi time
T2
constant(2)
Output current direction
Ph2
switching(2)
input(2
BLOCK DIAGRAM
Comparator reference input(2)
St2
VR2
Standby input(2)
h2
P
Output current
bs2
direction switching(2)
Bootstrap power supply(2)
V
32 30 17 29 28 27 22 21 20
19
VCC2 Power supply(2)
Voltage sensor Monostable
Standby circuit
comparator
MM2
Output power supply(2)
V
A2
Output(2)
M
MB2
MM2
Output(2)
V
bs2
Output power supply(2)
V
Bootstrap power supply(2)
R1
Comparator reference input(1)
V
St1
Standby input(1)
h1
P
Output current
bs1
direction switching(1)
V
Bootstrap power supply(1)
MM1
Output power supply(1)
V
A1
Output(1)
M
Output(1)
MB1
MM1
Output power supply(1)
V
1 3 16 4 5 6 11 12 13
Voltage sensor Monostable
Standby circuit
comparator
bs1
Bootstrap power supply(1)
V
14
VCC1 Power supply(1)
24
25 23 18
GND
31
C2
Comparator input(2)
T2
E2
Current sensor(2)
One-shot-multi time constant(2)
26
9
8 10 15
GND
2
C1
Comparator input(1)
One-shot-multi time constant(1)
T1
Current sensor(1)
7
E1
MITSUBISHI <CONTROL / DRIVER IC>
M54671SP
2-PHASE STEPPER MOTOR DRIVER
ABSOLUTE MAXIMUM RATI NGS (Ta=25˚C, unless otherwise noted)
Symbol Ratings
VCC
VMM
Vbs
VL
VC
VR
IL
IC
IMM
Pd
Topr
Tstg
Supply voltage -0.3 – 7
Output supply voltage
Bootstrap supply voltage
Logic input voltage
Analog input voltage
Comparative input voltage
Logic input current
Analog input current
Output supply current
Allowable loss
Operating temperature
Storage temperature
RECOMMENDED OPERATING CONDITIONS (Ta=25˚C, unless otherwise noted)
Symbol
VCC
VMM
Vbs
IO
tPLH
tPHL
TON
Supply voltage
Output supply voltage
Bootstrap supply voltage
Output current
Logic input rise time
Logic input fall time
Thermal shutdown
Parameter Conditions
Limits
Min. Typ. Max.
4.5
10
V
bs ≥ VMM+1V
20
5
12
800
5.5
20
24
1200
2
2
160
-0.3 – 24
-0.3 – 27
-0.3 – 6
-0.3 – V
-0.3 – 15
±1500
-20 – 75
-55 – 125
UnitParameter
V
V
V
mA
µs
µs
˚C
-10
-10
1.70
CC
Unit
V
V
V
V
V
V
mA
mA
mA
W
˚C
˚C
ELECTRICAL CHARACTERISTICS (Ta=25˚C, unless otherwise noted)
Symbol Test conditions UnitParameter
VIH “H”
VIL
VCH
ICO
IOFF
Vsat
tOFF
td
ICC
IH
I
IIL
Logic input voltage
Comparator threshold
Comparator input current
Output cutoff current
Saturation voltage
Cutoff time
Turn-off delay
Supply current
Logic input current
VCC=5V
“L”
V
R=5V
Voltage at sensing resistor is not included.
V
bs=12.7V, VMM=12V, IO=800mA
V
MM=12V, tON ≥ 5µs
dVK/dt ≥ 50mV/µs
CC=5V, 1phase
V
V
I=2.4V
“H”
V
I=0.4V
“L”
Limits
Min. Typ. Max.
2.0
0
420
-20
450 480
V
CC
0.8
20
100
1.5 V
2.0
5
1.0
10 15
1.6
25
100
-0.4
V
V
mV
µA
µA
µs
µs
mA
µA
mA
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