M54641L/FP
Bi-Directional Motor Driver with Brake Function
REJ03F0043-0100Z
Rev.1.0
Sep.19.2003
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 (V
CC
= 4 – 10V,V
CC
’(max) = 20V)
Low output saturation voltage in stationary motor circuit (largevoltage across motors)
Built-in clamp diode
Provided with output voltage control pin (V
Z
)
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
high-level, 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 V
Z
pin, the output “H” voltage does not rise over the
Zener voltage and the motor rotates at constant speed.
If the V
Z
pin is connected to the output power supply V
CC
’ pin, the rotating speed of the motor can be varied by varying
the V
CC
’ voltage.
The motor rush current and the current with the motor put in stationary status are as follows: Iop(max) = 800mA and
I
O
(max) = 150mA.
Rev.1.0, Sep.19.2003, page 1 of 8
M54641L/FP
Pin Configuration
Power supply V
CC
Output 2
Input 1
O
2
IN
1
GND
Output voltage
control
Input 2
Output 1
V
Z
IN
2
O
1
1
2
3
M54641L
4
5
6
7
8
Output power V
CC
’
supply
Outline 8P5
Output voltage
control
Input 2
Output 1
V
Z
IN
2
O
1
1
2
3
4
5
6
7
8
9
10
GND
IN
1
O
2
Input 1
Output 2
M54641FP
Output power V
CC
’
supply
NC
V
CC
Power supply
NC
Outline 10P2-C
NC: no connection
Logic Truth Table
Input
IN1
H
L
H
IN2
L
L
H
H
Output
O
1
“OFF” state
H
L
L
O
2
“OFF” state
L
H
L
Remarks
No operation of IC
ex Forward rotation
Reverse rotation
Brake
Rev.1.0, Sep.19.2003, page 2 of 8
M54641L/FP
Block Diagram
Power supply
V
CC
Output power supply
V
CC
’
Constant voltage
source
V
Z
Output voltage control
Input 1 IN
1
Input
circuit
Control
circuit
Output
circuit
O
2
Output 2
Input 2 IN
2
Input
circuit
Output
circuit
O
1
Output 1
GND
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.
1
Input circuit
V
CC
2
Output circuit
V
Z
V
CC
’
Output
1k
15k
Input IN
GND
GND
Rev.1.0, Sep.19.2003, page 3 of 8
M54641L/FP
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted.)
Parameter
Supply voltage
Output Supply voltage
Input voltage
Output voltage
Allowable motor rush current
Continuous output current
Power dissipation
Junction temperature
Operating temperature
Storage temperature
Symbol
V
CC
V
CC
’
V
I
V
O
I
O
(max)
I
O
Pd
Tj
Topr
Tstg
Ratings
−0.5
to +12
−0.5
to +20
0 to Vcc
−0.5
to VCC’+2.5
±800
±150
570
100
−10
to 60
−55
to 125
Unit
V
V
V
V
mA
mA
mW
°C
°C
°C
VI<VCC
t
OP
=10ms: cycle time 0.2Hz or less
Ta = 60°C(M54641L)
Conditions
Recommended Operating Condition
(Ta = 25°C, unless otherwise noted.)
Limits
Parameter
Supply voltage
Output current
“H” input voltage
“L” input voltage
Motor braking interval
Operation temperature of thermal
protection circuit (junction temperature)
Symbol
V
CC
I
O
V
IH
V
IL
t
S
T
S
Min.
4
3.0
0
10
100
100
120
Typ.
5
Max.
10
±100
V
CC
0.6
Unit
V
mA
V
V
ms
°C
Electrical characteristics
(Ta = 25°C, V
CC
= 5.0V, unless otherwise noted.)
Limits
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
Symbol
I
O
(leak)
V
OH
V
OL
V
O1-O2
I
I
I
CC
6.3
10.2
10.0
10.5
10.4
0.1
0.2
7.0
100
240
1.2
4.5
7.5
0.3
0.4
7.7
180
380
3.0
8.0
12.0
Min.
Typ.
Max.
100
−100
V
V
V
µA
mA
Unit
µA
Test conditions
V
CC
’ = 20V
V
Z
: Open
V
CC
’ = 12V
V
Z
: Open
V
CC
’ = 12V
V
Z
: Open
V
CC
’ = 12V
V
Z
= 7V
V
CC
’ = 12V
V
CC
= 10V
V
CC
’ = 12V
Output OPEN
V
O
= 20V
V
O
= 0V
I
OH
=
−50mA
I
OH
=
−100mA
I
OH
= 50mA
I
OH
= 100mA
I
O
= ±100mA
V
I
= 3V
V
I
= 5V
In “OFF” state
Forward rotation or
reverse rotation
Braking
Output open
Rev.1.0, Sep.19.2003, page 4 of 8
M54641L/FP
Typical Characteristics
Condition
•
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 (M54641L)
(Absolute Maximum Rating)
1.6
1.4
t = 20
sec
0.8
Thermal Derating (M54641FP)
(Absolute Maximum Rating)
Power Dissipation P
d(max)
(W)
1.2
t=
1.0
0.8
0.6
0.4
0.2
0
0
25
Power Dissipation P
d(max)
(W)
t = 10sec
0.6
0.4
0.2
50 60
75
100
0
0
25
50 60
75
100
Ambient Temperature T
a
(C)
Ambient Temperature T
a
(C)
“H” Output Saturation
Characteristics
-200
T
a
= 25C
V
CC
’ = 12V
V
Z
= Open
200
“L” Output Saturation
Characteristics
T
a
= 25C
V
CC
’ = 12V
V
Z
= Open
“H” Output Current I
OH
(mA)
“L” Output Current I
OL
(mA)
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
“H” Output Voltage V
CC’
-V
OH
(V)
-150
150
-100
100
-50
50
0
0
0
0.1
0.2
0.3
0.4
0.5
“L” Output Voltage V
OL
(V)
Rev.1.0, Sep.19.2003, page 5 of 8
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