Mitsubishi M54679FP Datasheet

PRELIMINARY

)

)I1(1)

Notice: This is not a final specification.
Some parametric limits are subject to change.

MITSUBISHI <CONTROL / DRIVER IC>

M54679FP

2-PHASE STEPPER MOTOR DRIVER

DESCRIPTION

The M54679FP is a semiconductor integrated circuit designed for
stepper motor driver used to Printer, PPC and Facsimile.

FEATURES

●Wide supply voltage sphere (10 – 35V).

●Bipolar, constant current PWM function.

(Top side transistors PWM function, maximum current is 0.8
Amps).

● Few external components.
(This IC can be operated with 1 capacitor and 2 resistances).

●4 phases input style (include the protection function of output
through current).

●Output current change function (2 bits, 4 type currents).

●Thermal protection circuit.

●Include flywheel diodes.

APPLICATION

Printer, PPC and Facsimile.

FUNCTION

The M54679FP is a semiconductor integrated circuit which can
drive two phase stepper motor.
It can control the direction of motor current and output motor
current (4 steps) by I0, I1 terminals.
Also, it can drive the two phase bipolar stepper motor by one IC as
it include two current control circuits.

PIN CONFIGURATI ON(TOP VIEW

N.C

P.GND

Out1A
Out1B

R

S1

Vm1

GND

V
Ph1A
Ph1B

Stby

Vref
I0(1)
I1(1)

1
2
3
4

S1

7
8

9
10
11
12
13
14
15 28

CC

16
17
18
19
20
21

42
41
40
39
385
376
36
35
34

M54679FP

33
32
31
30
29

27
26
25
24
23
22

N.C
N.C
Out2A
Out2B
Rs2
S2
Vm2

GND

Ph2A
Ph2B
Fref
Regout
I0(2)
I1(2)

BLOCK DIAGRAM

Ph1A

Ph1B

Regout
(3.5V)

18K

Vref

I0(1

1.25V

10K

Out1B Out1A

Logic

Vm1

Source
PWM

Logic

P.GND P.GND

Current
comp1

TSD

Standby

Spike
current
cancel

S

FF1

QR

QR

FF2

Frequency
Generator

VTM

Out2A Out2B

Source
PWM

Logic

Spike
current
cancel

S

Current
comp2

Vm2

VTH
VTL

Outline 42P9R-A

N.C: no connection

Ph2A

Ph2B

Logic

VCC

I0(2)
I1(2)

Rs1 RS2

S1 Fref S2

Stby

P.GND

GND

PRELIMINARY

)

Notice: This is not a final specification.
Some parametric limits are subject to change.

PIN FUNCTION

MITSUBISHI <CONTROL / DRIVER IC>

M54679FP

2-PHASE STEPPER MOTOR DRIVER

Terminal FunctionSymbol

Vm1, Vm2
Out1A, Out1B, Out2A, Out2B
Rs1, Rs2

CC

V
Ph1A, Ph1B, Ph2A, Ph2B
I0(1), I1(1), I0(2), I1(2)
Stby
S1, S2
Vref
Regout
Fref
P.GND

Motor Supply Voltage
Output terminals
Current sensor
Power supply
Phase input
Output current change
Standby input
Sense inputs
Vref input
Output of voltage stabilizer
A capacitor for oscillator
Power GND

Power supply for motor drive.
Motor drive output terminals.
Output current sensing resistor (Rs) connection terminals.
Control circuit power supply.
Output current direction switch terminals.
Output current change (100%, 70%, 33%, 0%) terminals.
Standby input (L: Standby, H or open: motor function) terminal.
Input voltage terminal of comparators.
Reference voltage due to setting output current.
Output of voltage stabilizer (3.5V).
A capacitor due to PWM carrier frequency.
The GND terminal of bottom side flywheel diodes.

ABSOLUTE MAXIMUM RATINGS(Ta = 25°C unless otherwise noted.

Symbol Conditions UnitsParameter

Vm Motor supply voltage -0.3 – 37
Iout
V

CC

Vlogic
Vanalog
VRs Output current sensing
Pd

Kθ
Tj
Topr

Tstg Storage temperature

Output current Per one phase ±0.8

Logic input voltage

Power dissipation 2.7
Thermal derating 46

Junction temperature
Operating temperature

Ph1A, Ph1B, Ph2A, Ph2B, I0, I1, Stby
Vref, S1, S2
Rs1, Rs2
Under board mount condition.

(see next page)

Ratings

-0.3 – 7.0

-0.3 – V

-0.3 – V

1.5

150

-20 – 75

-40 – 125

CC
CC

V
A
VPower supply
V
VAnalog input voltage
V

W

°C/W

°C
°C
°C

MITSUBISHI <CONTROL / DRIVER IC>

)

M54679FP

PRELIMINARY

Notice: This is not a final specification.
Some parametric limits are subject to change.

FUNCTIONAL CONDITIONS

Symbol

CC Power supply

V

Motor supply voltageVm V
Iout
t

PLH
PHL Falling time of logic inputs

t

Toff
TSDon

Output current

Rising time of logic inputs

PWM ON timeTon µs

PWM OFF time

Thermal shut down

Parameter

Min.

4.5
10
50
—
—

5.0

5.0
—

Limits

Typ.

5.0
—
—
—
—
—
—

160

ELECTRICAL CHARACTERISTICS(Ta = 25deg, VCC = 5.0V, VM = 24V unless otherwise noted.

CONTROL CIRCUIT

Symbol Conditions UnitsParameter

CC1

I
ICC2
ICC3 Stby = L (Standby condition) 2.0 4.0 6.0
Vlogic H
Vlogic L
I(Ph) H
I(Ph) L
I(I0, I1) H
I(I0, I1) L Vin = 0V
I(Stby) H
I(Stby) L Vin = 0V

I(S)

V(S)
I(Vref)

V(Vref)
FC
Vreg

CH(H)

V
V

CH(M)

V

CH(L)

Supply current

Logic input voltage
(Ph, I1, I0, Stby terminals)

Phase terminal input current

I0, I1 terminals input current

Standby terminal input current
Current sensing Comparators

input current
Current sensing Comparators

input voltage sphere
Vref input current
Vref input voltage sphere

Oscillation frequency of Fref C = 390pF, Fref terminal oscillation
Voltage stabilizer output

Current sensing Comparators
threshold voltage

Stby = H, Ph*A = H, Ph*B = L (Bridge ON)
Stby = H, Ph*A = Ph*B (Bridge OFF)

Vin = 5V
Vin = 0V

Vin = 5V — — 10

Vin = 5V — — 10

S1 or S2 terminals input current
(S1 or S2 = 0V, Vref = 5V).

S1 or S2 terminal input voltage sphere
Input current of Vref (Vref = 5V, I0 = I1 = 0V)

Iout = -0.1mA – +1mA
I0 = L, I1 = L, Vref = 5V (Vref/10*100%)

I0 = H, I1 = L, Vref = 5V (Vref/10*70%)
I0 = L, I1 = H, Vref = 5V (Vref/10*33%)

2-PHASE STEPPER MOTOR DRIVER

Max.

5.5
35

800

2.0

2.0
50
50
—

Units

V

mA

µs
µs

µs
°C

Limits

Min. Typ. Max.

39
20

2.4
0

——10

-20

-400 -300 —

-400 -300 5.0

-20

0

—

0

20

3.35
475
325
139

56
27

—
—

-3.0

-3.0

—

500 650

—V
30 40

3.50 3.65
500 525
350 375
155 171

V

73
40

V

CC

0.6

—

—

CH(H)

CC

mA

V

µA

µA

µA

µA

V

µA

V

kHz

V
mV
mV
mV