Mitsubishi M54646AP Datasheet
MITSUBISHI <CONTROL / DRIVER IC>
)
(2)
(1)
)
oltage
)
M54646AP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54646AP is a semiconductor IC to drive bipolar stepper
motors by controlling winding current with reference to a
designated current level.
FEATURES
●Wide driver voltage range (10 – 40V)
●Wide output current control range (20 – 800mA)
●Bipolar and constant current control
●Built-in flywheel diode
●Built-in thermal protection circuit
APPLICATION
Office automation equipment such as printers, FDDs, HDDs and
facsimiles
FUNCTION
M54646AP Integrated Circuit drives two-phase bipolar stepper
motors while controlling winding current: It controls winding current
direction by inputting phases (pins 14 and 15) and, at the same
time, controls winding current amperage with terminals VR (pins
2 27
and ).
Provided with control circuits that output two phases, this IC is
sufficient to drive a two-phase bipolar stepper motor.
PIN CONFIGURATION(TOP VIEW
Comparator input (1)
Comparator reference
v
input (1
Output stage
supply voltage (1)
Output terminal (1)
Current sensor (1)
Output terminal (1)
Output stage
supply
voltage ((1)
Power supply (1)
One-shot multi
time constant
Output current
direction switch
VR1
VMM1
MA1
GND
MB1
VMM1
CC1
V
Ph1
C1
E1
T1
1
→
2
→
3
4
←
5
←
6
7
8
9
10
←
11
12
13
→←
→
14
Outline 28P4B
28
←
27
←
26
25
→
24
→
M54646AP
23
22
21
20
19
→
18
17
16
→←
←
15
2
Comparator input (2)
C
Comparator reference
VR2
voltage input (2)
Output stage
VMM2
supply voltage (2)
Output terminal (2)
A2
M
Current sensor (2)
E2
GND
MB2
Output terminal (2)
Output stage
VMM2
supply
voltage (2)
Power supply (2)
CC2
V
One-shot multi
T2
time constant
Output current
Ph2
direction switch
BLOCK DIAGRAM
Comparator
reference
voltage input (2)
VR2 Ph2
27 41014
Power
supply (1)
12
CC1
V
Output current
direction switch
15
1
tOFF = 0.69 • RT • CT
Current sensor
Output
terminal (2)
MB2
M
A2
19
1
Output stage
supply voltage (2)
VMM2
18
1
Direction switch
Comparator
reference
voltage input (1)
VR1 Ph1
2
output current
Output stage
VMM1
325
1
1
supply voltage (1)
M
A1
Output
terminal (1)
MB1
1
Power
supply (2)
17
V
CC2
1
1
1
1
TSD
Monostable
OFF = 0.69 • RT • CT
t
Current sensor
Monostable
20 2122 23
GND
28
C2
Comparator
input
16
One-shot multi
time constant
T
24 6789
2
E
2
Current
sensor
GND
1
C
1
Comparator
input
13 5
T1 E1
One-shot multi
time constant (1
Current
sensor (1)
MITSUBISHI <CONTROL / DRIVER IC>
)
)
)
ABSOLUTE MAXIMUM RATINGS(Ta = 25°C unless otherwise noted
M54646AP
2-PHASE STEPPER MOTOR DRIVER
Symbol Conditions UnitParameter
CC Supply voltage
V
VMM
VL
VC
VR
IL
IC mA
O mA
I
Pd
Topr
Tstg
Logic input voltage
Analog input voltage
Reference input voltage
Logic input current
Analog input current
Output current
Power dissipation
Operating temperature
Storage temperature
Measured with IC mounted on board
Ratings
-0.3 – 7
-0.3 – 45
-0.3 – 6
-0.3 – V
-0.3 – 15
-10
-10
±1000
1.92
-20 – 85
-55 – 125
CC
RECOMMENDED OPERATIONAL CONDITIONS(Ta = 25°C unless otherwise noted
Symbol
CC Supply voltage
V
VMM Output stage supply voltage 4010
IO Output current
tPLH Logic input rise time
tPHL Logic input fall time 2
TON Thermal shutdown temperature
Parameter
Min.
Limits
Typ.
5 5.54.5
165
Max.
80020
2
Unit
V
V
mA
µs
µs
°C
V
VOutput stage supply voltage
V
V
V
mA
W
°C
°C
ELECTRICAL CHARACTERISTICS(VCC = 5V, Ta = 25°C unless otherwise noted
Symbol Test Conditions UnitParameter
IH
V
VIL
ICH
ICO
IOFF
V
sat
tOFF
td
ICC
IIH
IIL
Logic input voltage
Comparator threshold voltage
Comparator input current
Output cutoff current
Total saturation voltage
Cutoff time
Turn-off delay
Power current
Logic input current
“H”
VCC = 5V
“L”
R = 5V
V
Sensing resistance is not included.
(IO = 500mA)
VMM = 10V, tON ≥ 5µs
dVK/dt ≥ 50mV/µs
V
CC = 5V, 1 phase
“H”
“L”
I = 2.4V
V
I = 0.4V
V
Min. Typ. Max.
400
-20
-0.4
2.0
25
Limits
430
30
1.6
V
0.80
450
20
100
3.5
35
2.0
25
20
CC
V
V
mA
µA
µA
V
µs
µs
mA
µA
mA
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