M54670 반도체 회로 부품 판매점
2-PHASE STEPPER MOTOR DRIVER
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 Mitsubishi |
MITSUBISHI <CONTROL / DRIVER IC>
M54670P
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54670P is a semiconductor IC to drive a bipolar stepper
motor directly by controlling the coil current with the constant
current method.
FEATURES
q Wide operating voltage range (10 – 35V)
q Wide output current control range (20 – 800mA)
q Bipolar and constant current drive
q Built in flywheel
q Current level can be changed by steps or continuously.
q Built in a thermal shutdown circuit
APPLICATION
Office automation equipment such as printer, FDD, HDD, and FAX
FUNCTION
The M54670P 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 3 and 30).
The coil current value can be selected among four levels (0 to
max.) by selecting the combination of three internal comparators by
logic input (pins 14, 15, 18 and 19). It also can be continuously
controlled with VR pins (pins 2 and 31). By selecting an I input pin
among pins 14, 15, 18 or 19, the operation timing, 2-phase
excitation, 1-2-phase excitation or microstep, can be selected.
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)
Triangular wave
CT 1
Comparator
reference input(A) VR(A) 2
Output current
direction switching(A)
Ph(A)
3
Output power
supply(A)
VMM1(A)
4
Output(A) O1(A) 5
6
7
GND 8
9
10
Current sensor(A) E(A) 11
Output(A) O2(A) 12
Output power
supply(A) VMM2(A) 13
Output current
value setting(A)
Output current
value setting(A)
I0(A) 14
I1(A) 15
Comparator
input(A)
C(A) 16
32 VCC Circuit power supply
Comparator
31 VR(B) reference input(B)
30
Ph(B)
Output current
direction switching(B)
29
VMM1(B)
Output power
supply(B)
28 O1(B) Output(B)
27
26
25 GND
24
23
22 E(B) Current sensor(B)
21 O2(B) Output(B)
Output power
20 VMM2(B) supply(B)
19 I0(B)
18 I1(B)
Output current
value setting(B)
Output current
value setting(B)
17 C(B)
Comparator
input(B)
Outline 32P4B
BLOCK DIAGRAM
2 32 3
4 5 12 13
29 28
21 20
30
31
Output current value
setting(A)
I0(A) 14
Output current value 15
setting(A)
I1(A)
00 10 01 11
TSD
11 01 10 00
Output current value
setting(B)
19 I0(B)
18 Output current value
setting(B)
I1(B)
6
GND
10
Power supply sensor
Triangular
wave
16
C(A)
Comparator input(A)
1
CT
Triangular wave
11 22
E(A)
E(B)
Current sensor(B)
Current sensor(A)
Power supply sensor
23
GND
27
17
C(B)
Comparator input(B)
MITSUBISHI <CONTROL / DRIVER IC>
M54670P
2-PHASE STEPPER MOTOR DRIVER
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise noted)
Symbol
VCC
VMM
VI
VC
VR
IO
Pd
Topr
Tstg
Parameter
Supply voltage
Output supply voltage
Logic circuit input voltage
Comparator input voltage
Reference input voltage
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Conditions
Mounted on a board
Ratings
-0.3 – 7
-0.3 – 40
-0.3 – 6
VCC
7
±1.0
1.92
-20 – 75
-55 – 125
Unit
V
V
V
V
V
A
W
°C
°C
RECOMMENDED OPERATING CONDITIONS (VCC=5.0V, Ta=25°C, unless otherwise noted)
Symbol
VCC
VMM
VR
IO
tPLH
tPHL
TON
Parameter
Supply voltage
Output supply voltage
Reference input voltage
Output current
Logic input rise time
Logic input fall time
Thermal shutdown temperature *
Min.
4.75
10
0
20
Limits
Typ.
5.00
—
175
Max.
5.25
35
5
800
2.0
2.0
Unit
V
V
V
mA
µs
µs
°C
* : Refer to "PRECAUTIONS FOR USE."
ELECTRICAL CHARACTERISTICS (VCC=5.0V, VMM=10V, Ta=25°C, unless otherwise noted)
Symbol
VIH
VIL
VCH
VCM
VCL
ICO
IOFF
Vsat
Parameter
Logic input voltage
Comparator threshold
Comparator input current
Output cutoff current
Saturation voltage
fc PWM oscillator frequency
td Turn-off delay
ICC Supply current
IIH Logic input current
IIL
Test conditions
“H”
“L” VCC=5V
VR=5V, I0=I1=0
VR=5V, I0=1, I1=0
VR=5V, I0=0, I1=1
I0=I1=1(Ta=25°C)
Voltage at sensing resistor is not included.
I0=500mA
VMM=10V, Cf=3900pF
Ta=25°C, dV/dt≥50mV/µs
VCC=5V
“H” VI=2.4V
“L” VI=0.4V
Min.
2.0
0
430
265
90
-20
—
—
16.5
—
—
—
—
Limits
Typ.
—
—
460
285
110
-2
0
3.0
33
1.0
8.0
180
20
Max.
VCC
0.8
480
305
130
20
100
4.5
66
2.0
25
400
50
Unit
V
V
mV
mV
mV
µA
µA
V
kHz
µs
mA
µA
µA
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M54670 driver
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