Mitsubishi M54677FP Datasheet

MITSUBISHI <CONTROL / DRIVER IC>

)

M54677FP

2-PHASE STEPPER MOTOR DRIVER

DESCRIPTION

The M54677FP 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 – 1000mA)

● Bipolar and constant current

●Built in a thermal shutdown circuit

●Built in flywheel diodes

APPLICATION

Office automation equipment such as printer, FDD, HDD, and FAX

FUNCTION

The M54677FP 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 by Ph input and the coil current
value by Vref pin.
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

36
35
34
33
325
316
30

M54677FP

29
289
2710
2611
2512
24
23

21
20
19

GND

1

St1

2

C1

3

Vref1

4

VM11

A1

M

E1

7
8

13

N.C

14

B1

M

15 22

VM12

16

Vcc1

17

T1

Ph1

18

Outline 36P2R-D

St2
C2
Vref2

V

M21

MA2
E2

GND

N.C
M

B2

VM22
Vcc2

T2
Ph2

N.C: no connection

BLOCK DIAGRAM

St2

Vref2

34

36

21

Vcc2

25 30

GND C2 T2 E2 GND C1 T1 E1

19 33 32 23 22

current

-comp

–

Ph2

35

mono-multi

+

–

–

+

standby

-comp

St1

Vref1

VM21

MA2

MB2

VM22

1 3

Buffer

20

31

7

–

Ph1

18 4 5 14 15

current

-comp

12 2

mono-multi

+

–

–

+

standby

-comp

VM11

Buffer

17 6

MA1

MB1

VM12

16

Vcc1

MITSUBISHI <CONTROL / DRIVER IC>

M54677FP

2-PHASE STEPPER MOTOR DRIVER

ABSOLUTE MAXIMUM RATINGS(Ta=25˚C, unless otherwise noted)

Symbol Ratings

Vcc -0.3 – 7
VM
VL
Vc -0.3 – Vcc
Vref
I

O

Pd
Kθ
Tj
Topr
Tstg

Supply voltage
Output supply voltage
Logic input voltage
Analog input voltage
Comparative input voltage
Output current
Allowable loss
Thermal derating
Junction temperature
Operating temperature
Storage temperature

RECOMMENDED OPERATING CONDITIONS

Symbol

Vcc
VM
Io
tPLH
tPHL
Ton

Small-signal supply voltage
Output supply voltage
Output current
Logic input rise time
Logic input fall time
Thermal shutdown temperature

Parameter Conditions

16 21

Pins and

4 15 33 32

36 18 191

2 35

Limits

Typ.

500

160

and
and

343

Max.

5.5

1000

2
2

Pins
Pins
Pins and
Pins and

Mounted on a glass epoxy board (100mm x 100mm, t=1.6mm)
Mounted on a glass epoxy board (100mm x 100mm, t=1.6mm)

Min.

10 26.5

-0.3 – 28

-0.3 – 6

-0.3 – Vcc
1500

2.0

62.5
150

-20 – 75

-40 – 125

UnitParameter

V5.04.5

V

mA

µS

µS

˚C

Unit

V
V
V
V
V

mA

W

˚C/W

˚C
˚C
˚C

ELECTRICAL CHARACTERISTICS(Ta=25˚C, Vcc=5V, VM=24V, unless otherwise noted)

Symbol Test conditions UnitParameter

VIH
VIL

VIH
VIL
VCH
IC
VC
Iref
Vref
IOFF
Vsat

tOFF
td
Icc1
Icc2
IIH
IIL
IIH
IIL

Logic input voltage (St pin)

Logic input voltage (Ph pin)
Comparator input offset voltage

Comparator input current
Comparator input voltage range
Vref input current
Vref input voltage range
Output cutoff current
Saturation voltage
Cutoff time
Output turnoff delay

Supply current

Logic input current (St pin)

Logic input current (Ph pin)

“H”

Vcc=5V

“L”
“H”

Vcc=5V

“L”

Vref = 500mV
C pin input current (C=0V, Vref=500mV)

Vref pin input current (Vref=0V, C=500mV)

Voltage at sensing resistor is not included. Io=0.5A

16

Pin current (16Pin=5V)

21

Pin current (21Pin=5V)

“H”

Vin = 5V

“L”

Vin = 0V

“H”

Vin = 5V

“L”

Vin = 0V

Min. Typ. Max.

2.0
0

2.0
0

-4

-20
0

-20
0

5

-200

-200

Limits

2

-5

-5

1.3
27

1.6
27
26

Vcc

0.6

Vcc

0.8
8

1.5

1.5

100

1.8

50

2.0

40
39
10

10

V
V
V
V

mV

µA

V

µA

V

µA

V

µS
µS

mA
mA

µA
µA
µA
µA