Mitsubishi M54641 Bi-directional motor driver with brake function 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.
PIN CONFIGURATION (TOP VIEW)
Power supply VCC
1
Output 2
O2
2
Input 1
IN1
3
FEATURES
APPLICATION
GND
4
Output voltage
control
VZ
5
Input 2
IN2
6
Output 1
O1
7
Output power VCC’
supply
8
Sound equipment such as tape deck and radio cassette, and VTR
M54641L
● 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)
Outline 8P5
FUNCTION
BLOCK DIAGRAM
Power supply
VCC
Output voltage
control
VZ
1
6
GND
Input 2
IN2
2
7
IN1
Input 1
Output 1
O1
3
8
O2
Output 2
Output power VCC’
supply
NC
4
9
VCC Power supply
Input 1 IN1
Control
circuit
Input 2 IN2
Input
circuit
GND
5
10
Outline 10P2-C
NC
NC: no connection
LOGIC TRUTH TABLE
Input
IN1
L
H
L
H
Output
IN2
L
L
H
H
O1
O2
“OFF”
state
“OFF”
state
H
L
L
L
H
L
Remarks
No operation of IC
ex
Forward rotation
Reverse rotation
Brake
Output power supply
VCC’
Constant voltage
source
Input
circuit
M54641FP
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.
VZ Output voltage control
Output
circuit
O2 Output 2
Output
circuit
O1 Output 1
MITSUBISHI <CONTROL / DRIVER IC>
M54641L/FP
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
Input circuit
Output circuit
VZ
VCC’
VCC
Output
Input IN
1k
15k
GND
GND
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted)
Symbol
VCC
VCC’
VI
VO
IO(max)
IO
Pd
Tj
Topr
Tstg
Conditions
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
VI<VCC
tOP =10ms: cycle time 0.2HZ or less
Ta = 60˚C(M54641L)
Ratings
Unit
-0.5 – +12
-0.5 – +20
0 – VCC
-0.5 – VCC’+2.5
±800
±150
570
100
V
V
V
V
mA
mA
mW
˚C
˚C
˚C
-10 – 60
-55 – 125
RECOMMENDED OPERATING CONDITION (Ta = 25˚C, unless otherwise noted)
Symbol
VCC
IO
VIH
VIL
tS
TS
Parameter
Supply voltage
Output current
“H” input voltage
“L” input voltage
Motor braking interval
Operation temperature of thermal
protection circuit (junction temperature)
Conditions
Min.
4
Limits
Typ.
5
3.0
0
10
100
V
mA
V
V
ms
100
120
˚C
Max.
10
±100
VCC
0.6
Unit
MITSUBISHI <CONTROL / DRIVER IC>
M54641L/FP
Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
ELECTRICAL CHARACTERISTICS (Ta=25˚C, VCC = 5V, unless otherwise noted)
Test conditions
Parameter
Symbol
IO(leak)
Output leak current
VCC’ = 20V
VZ: Open
VOH
“H” output saturation voltage
VCC’ = 12V
VZ: Open
VOL
“L” output saturation voltage
VCC’ = 12V
VZ: Open
VO1-O2
Voltage between outputs (1)
and (2) (Voltage across Motor)
VCC’ = 12V
VZ = 7V
II
Input voltage
VCC’ = 12V
ICC
Supply current
VCC = 10V
VCC’ = 12V
Output OPEN
TYPICAL CHARACTERISTICS
VI = 3V
VI = 5V
Min.
VO = 20V
VO = 0V
IOH = -50mA
IOH = -100mA
IOH = 50mA
IOH = 100mA
10.2
10.0
IO = ±100mA
6.3
Output open
In “OFF” state
Forward rotation or
reverse rotation
Braking
Max.
100
-100
0.3
0.4
V
7.0
7.7
V
100
240
1.2
180
380
3.0
µA
4.5
8.0
mA
7.5
12.0
V
0.8
Power Dissipation Pd(max) (W)
Power Dissipation Pd(max) (W)
1.4
t = 10sec
t=
1.0
0.8
0.6
0.4
0.2
0
0
25
50 60
75
0.6
0.4
0.2
0
0
100
25
Ambient Temperature Ta (˚C)
75
100
“L” Output Saturation
Characteristics
-200
200
Ta = 25˚C
VCC’ = 12V
VZ = Open
Ta = 25˚C
VCC’ = 12V
VZ = Open
“L” Output Current IOL (mA)
“H” Output Current IOH (mA)
50 60
Ambient Temperature Ta (˚C)
“H” Output Saturation
Characteristics
-150
-100
-50
0
0
µA
10.5
10.4
0.1
0.2
Thermal Derating (M54641FP)
(Absolute Maximum Rating)
t = 20sec
1.2
Unit
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
Limits
Typ.
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)
150
100
50
0
0
0.1
0.2
0.3
0.4
“L” Output Voltage VOL (V)
0.5
MITSUBISHI <CONTROL / DRIVER IC>
M54641L/FP
Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
APPLICATION EXAMPLE
2
3
VB
VB
10 – 100µF
M
IN1
IN2
8
7
6
5
4
3
2
10 – 100µF
3
IN1
1
10
9
8
7
6
4
5
M54641L
M
M54641FP
1
2
3
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
2
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