Mitsubishi M54678FP Datasheet
MITSUBISHI <CONTROL / DRIVER IC>
)
M54678FP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54678FP is a semiconductor integrated circuit designed for
stepper motor driver used to printer, PPC and facsimile.
FEATURES
●Wide supply voltage range (10 – 35V)
●Output current is controlled by PWM operation
●Few external components (This IC can be operated with 1
capacitor and 2 resistances)
●Voltage stabilizer circuit (Regout = 3.5V)
●Thermal protection circuit
●Flywheel diode
APPLICATION
Printers, PPC, facsimile
FUNCTION
The M54678FP is a integrated circuit which can drive two phase
stepper motor. The output current direction is determined by phase
terminal function, and the output current level is controlled by Vref
terminals voltage.
PIN CONFIGURATION(TOP VIEW
P.GND
Out1
Out1B
GND GND
Vref1
Regout
1
2
3
4
Rs1
S1
Vm
7
8
13
N.C
14
CC
V
15 22
Ph1
16
En1
17
18 19
36
35
34
33
325
316
30
M54678FP
29
289
2710
2611
2512
24
23
21
20
N.C
Out2
Out2B
Rs2
S2
Vm
N.C
N.C
Ph2
En2
Vref2
Fref
BLOCK DIAGRAM
Ph1
En1
Delay Delay
Logic
Out1
Out1B
Source
PWM
P.GND P.GND
Spike
current
cancel
Current
comp1
S
FF1
Logic
QR
Vm
Delay
QR
FF2
Frequency
Generator
VTM
Logic
S
Out2 Out2B
Spike
current
cancel
Source
PWM
Current
comp2
VTH
VTL
Outline 36P2R-D
Delay
Logic
Regulator(3.5V)
1.25V
10K
N.C: no connection
Ph2
En2
VCC
Regout
18K
Rs1 Rs2
Vref1S1 Fref Vref2 S2
GND
)
PIN FUNCTION
MITSUBISHI <CONTROL / DRIVER IC>
M54678FP
2-PHASE STEPPER MOTOR DRIVER
Terminal FunctionsSymbol
Vm
Out1, Out1B, Out2, Out2B
Rs1,Rs2
CC
V
Ph1, Ph2
En1, En2
S1, S2
Vref1, Vref2
Regout
Output stage supply voltage
Output terminal
Current sensor
Power supply
Phase input
Enable input
Sense input
Vref input
Voltage stabilizer output
Power supply for motor working
Motor drive output terminal
Output current sensing resistor (Rs) connect terminal
Control circuit power supply
Output current direction switch
“L” input → Motor on “H” input → Enable
Comparator input voltage terminal
Comparator reference voltage terminal
Constant voltage output (Vout = 3.5V)
ABSOLUTE MAXIMUM RATINGS(Ta = 25°C unless otherwise noted.
Symbol Conditions UnitParameter
Vm Output stage supply voltage -0.3 – 37
Iout
V
CC
Vlogic
Vanalog
VRs Current sensor voltage
Pd
Kθ
Tj
Topr
Tstg
Output current 1phase ±1.0
Logic input voltage
Power dissipation
Thermal derating 62.5
Junction temperature
Operating temperature
Storage temperature
Ph, En Pin
Vref, S Pin
Rs Pin
100mm × 100mm, t = 1.6mm
glassfiber epoxy resin circuit board
100mm × 100mm, t = 1.6mm
glassfiber epoxy resin circuit board
Ratings
-0.3 – 7
-0.3 – V
-0.3 – V
1.5
2.0
150
-20 – 75
-40 – 125
CC
CC
V
A
VSupply voltage
V
VAnalog input voltage
V
W
°C/W
°C
°C
°C
RECOMMENDED OPERATIONAL CONDITIONS
Symbol
CC Supply voltage
V
Output stage supply voltageVm V
Iout
t
PLH
PHL Logic input fall time
t
Toff
TSDon
Output current
Logic input rise time
PWM on timeTon µS
PWM off time
Thermal shutdown temperature
Parameter
Min.
4.5
10
50
—
—
—
Limits
Typ.
5.0
—
—
—
—
5
5
—
—
160
Max.
5.5
35
800
2
2
50
50
—
Unit
V
mA
µS
µS
µS
°C
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