Mitsubishi M54641L, M54641FP Datasheet

MITSUBISHI <CONTROL / DRIVER IC>

)

M54641L/FP

Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION

DESCRIPTION

The M54641 is a semiconductor integrated circuit that is capable of
directly driving a smallsize bi-directional motor rotating in both
forward and reverse directions.

FEATURES

● Wide range of operating voltage (VCC = 4 – 10V,VCC’(max) = 20V)

● Low output saturation voltage in stationary motor circuit (large

voltage across motors)

● Built-in clamp diode

● Provided with output voltage control pin (VZ)

● Built-in thermal shutdown circuit (Tj(shut) = 120˚C standard)

APPLICATION

Sound equipment such as tape deck and radio cassette, and VTR

FUNCTION

The M54641 is an IC for driving a smallsize bi-directional motor
that rotates in both forward and reverse directions. Giving signal to
inputs IN1 and IN2 outputs the signal of the same phase to output
pins O1 and O2. That is, giving high-level signal to input IN1 and
low-level signal to input IN2 sets output O1 to high-level and output
O2 to low-level. Connection of a motor between output pins O1 and
O2 uses O1 as an output current source and O2 as an output
current sink to rotate the motor. In addition, giving the reverse
signal to inputs IN1 and IN2 sets O1 and O2 to low-level and high­level, respectively, resulting in rotating the motor reversely.
However, when both IN1 and IN2 are set to “H”, both O1 and O2 are
set to low-level, resulting in sudden stop of motor rotation. (Brake
mode)
If the Zener diode of certain voltage, for example, is added to the
VZ pin, the output “H” voltage does not rise over the Zener voltage
and the motor rotates at constant speed.
If the VZ pin is connected to the output power supply VCC’ pin, the
rotating speed of the motor can be varied by varying the VCC’
voltage.
The motor rush current and the current with the motor put in
stationary status are as follows: Iop(max) = 800mA and IO(max) =
150mA.

PIN CONFIGURATION(TOP VIEW

Input 1

control

Input 2

supply

IN2

VCC’

NC

GND

VZ

O

VCC

IN

IN2

VCC’

1

O2

1

VZ

O1

1
2
3
4
5

1
2
3

M54641L

4
5
6
7
8

Outline 8P5

M54641FP

Outline 10P2-C

Power supply

Output 2

Output voltage

Output 1

Output power

Output voltage

control
Input 2

Output 1

Output power

supply

LOGIC TRUTH TABLE

Input

1

IN

L

H

L

H

IN

2

L

L
H
H

O

“OFF”

state

H
L

L

Output

1

O

“OFF”

state

H

GND

6
7

IN

8

O2

9

VCC
NC

10

NC: no connection

2

No operation of IC

ex

L

Forward rotation

Reverse rotation

L

1

Input 1
Output 2

Power supply

Remarks

Brake

BLOCK DIAGRAM

Input 1

Input 2 IN2

Power supply

V

CC

Constant voltage

source

1

IN

Input

circuit

Control

circuit

Input

circuit

GND

Output power supply

Output

circuit

Output

circuit

V

CC’

Z

Output voltage controlV

Output 2O2

Output 1O1

Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION

Though the IC is equipped with a thermal shutdown circuit for
prevention against thermal breaking, the threshold temperature is
set to 100°C min. Set the driving current in such a way that this
thermal shutdown circuit cannot operate during normal operation.

INPUT/OUTPUT CIRCUIT

1 2

VCC

MITSUBISHI <CONTROL / DRIVER IC>

M54641L/FP

V

Output circuitInput circuit

Z

VCC’

Output

INInput

15k1k

GND

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

Symbol

VCC
VCC’
VI
VO

IO(max)
IO

Pd

j Junction temperature

T
Topr
Tstg

Supply voltage
Output Supply voltage

Input voltage
Output voltage
Allowable motor rush current
Continuous output current
Power dissipation

Operating temperature
Storage temperature

Parameter

V

I<VCC

t

OP =10ms: cycle time 0.2HZ or less

a = 60˚C(M54641L)

T

Conditions

RECOMMENDED OPERATING CONDITION (Ta = 25˚C, unless otherwise noted)

Symbol

V

O

I
VIH
VIL

CC

Supply voltage
Output current
“H” input voltage

“L” input voltage

tS Motor braking interval

S

T

Operation temperature of thermal
protection circuit (junction temperature)

Parameter

Conditions Unit

Min.

3.0

10

100

4

0

Ratings

-0.5 – +12

-0.5 – +20
0 – VCC

– VCC’+2.5

-0.5
±800
±150

-10

-55

Limits

570
100

– 60

– 125

Typ.

5

100
120

GND

Max.

10

±100

VCC

0.6

Unit

V
V
V

V
mA
mA

mW

˚C
˚C
˚C

V
mA

V

V
ms

˚C

MITSUBISHI <CONTROL / DRIVER IC>

Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION

ELECTRICAL CHARACTERISTICS (Ta=25˚C, VCC = 5V, unless otherwise noted)

Symbol

I

O(leak)

VOH

VOL

VO1-O2

II

ICC

Parameter

Output leak current

“H” output saturation voltage

“L” output saturation voltage
Voltage between outputs (1)

and (2) (Voltage across Motor)
Input voltage

Supply current

CC’ = 20V

V
V

Z: Open
CC’ = 12V

V
V

Z: Open
CC’ = 12V

V
V

Z: Open

VCC’ = 12V
V

Z = 7V

V

CC’ = 12V

CC = 10V

V
V

CC’ = 12V

Output OPEN

Test conditions

VI = 3V
V

I = 5V

V

O = 20V

V

O = 0V

OH = -50mA

I
I

OH = -100mA
OH = 50mA

I
I

OH = 100mA

I

O = ±100mA

Output open
In “OFF” state

Forward rotation or
reverse rotation

Braking

Min.

10.2

10.0

6.3

M54641L/FP

Limits

Typ.

10.5

10.4

0.1

0.2

7.0

100
240

1.2

4.5

7.5

Max.

100

-100

0.3

0.4

7.7

180
380

3.0

8.0

12.0

Unit

µA

V

V

V

µA

mA

TYPICAL CHARACTERISTICS

Thermal Derating (M54641L)

(Absolute Maximum Rating)

sec

t = 20

t =

0

0

25 50 60 75 100

Ambient Temperature Ta (˚C)

“H” Output Saturation

Characteristics

Ta = 25˚C

CC’ = 12V

V

Z = Open

V

Power Dissipation Pd(max) (W)

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

-200

-150

Condition

t = 10sec

• With basic installation (epoxy board of 5cm x 5cm x 0.8mmt with copper foil on a single
side)

• t : Power apply time

Thermal Derating (M54641FP)

(Absolute Maximum Rating)

0.8

0.6

0.4

0.2

Power Dissipation Pd(max) (W)

0

0

25 50 60 75 100

Ambient Temperature Ta (˚C)

“L” Output Saturation

Characteristics

200

Ta = 25˚C

CC’ = 12V

V

Z = Open

V

150

-100

-50

“H” Output Current IOH (mA)

0

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

“H” Output Voltage VCC’-VOH (V)

100

50

“L” Output Current IOL (mA)

0

0 0.1 0.2 0.3 0.4 0.5

“L” Output Voltage VOL (V)

APPLICATION EXAMPLE

2

M

1

IN
IN2

87654321

M54641L

MITSUBISHI <CONTROL / DRIVER IC>

M54641L/FP

Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION

3

B

V

10 – 100µF

VB

IN1

3

10 9 8 7 6

M

M54641FP

10 – 100µF

CAUTIONS

Since the thermal protection function of this IC may not work in
abnormal status (oscillation, low supply voltage, output short­circuit, etc.), check the operation in the IC installation status when
using this function.
When the motor back electromotive force is large with the brakes
applied, for example, malfunction may occur in internal parasitic Di.
If flyback current of 1A or more flows, add Schottky Di to the
portion between the output and the GND.
When the IC is used at a high speed for PWM, etc., note that
switching of output results in delay of approx. 10µs.

IN2

1

2

3 4 5

2