FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-29104-3E
ASSP
DUAL REVERSIBLE
MOTOR DRIVER
MB3863
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DESCRIPTION
The MB3863 is an IC motor driver with two independent reverse control functions. It drives motor drives of front-
loading VTRs and auto-reverse cassette decks and stepping motors by reversible control at TTL and CMOS levels.
A heat protection circuit is incorporated to prevent damage by overheating.
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FEATURES
•
•
•
•
•
•
•
•
•
•
Wide voltage range: V
CC
= +4 to +36 V
Motor drive current: 500 mA (1.2 A for surge current)
Two internal independent drivers
Internal heat protection circuit
Control at TTL and CMOS level
Stand-by mode
Brake function to stop motors
Internal surge absorption diode
Stepping motor application
Symmetrical pin layout
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PACKAGE
20-pin Plastic SOP
(FPT-20P-M01)
MB3863
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PIN ASSIGNMENT
(TOP VIEW)
B-IN
ch.1
B-V
CC
N.C.
B-OUT
GND
GND
B-OUT
ch.2
N.C.
B-V
CC
B-IN
1
2
3
4
5
6
7
8
9
10
(FPT-20P-M01)
20
19
18
17
16
15
14
13
12
11
N.C.
A-V
CC
A-IN
A-OUT
GND
GND
A-OUT
A-IN
A-V
CC
N.C.
ch.2
ch.1
N.C.: No connection
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BLOCK DIAGRAM
A-V
CC
A-IN
ch.1
B-IN
B-V
CC
Heat protection
circuit
A-V
CC
A-IN
ch.2
B-IN
B-V
CC
GND
Input logic
channel 2
Drive
Drive
A-OUT
ch.2
B-OUT
Input logic
channel 1
Drive
Drive
A-OUT
ch.1
B-OUT
2
MB3863
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ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Output Current
Maximum Output Current (within 5 ms)
Allowable Loss
Operating Temperature
Storage Temperature
Symbol
V
CC
I
O
IOmax
P
D
T
OP
Tstg
Ratings
Min.
–20
–55
Max.
+38
550
1.2
1.6 (SOP-20)
+75
+150
Unit
V
mA
A
W
°C
°C
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
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RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Output Current
Input Voltage
High level
Low level
Symbol
V
CC
I
O
V
IH
V
IL
Ratings
Min.
+4
0
2.4
0
Max.
+36
500
V
CC
+0.3
0.4
Unit
V
mA
V
V
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device’s electrical characteristics are warranted when the device is
operated within these ranges.
Always use semiconductor devices within their recommended operating condition ranges. Operation
outside these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representatives beforehand.
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MB3863
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ELECTRICAL CHARACTERISTICS
(V
CC
= 24 V, V
IN
= 2.4 V, Ta = +25
°C)
Values
Unit
Min.
Typ.
Max.
—
—
—
—
22.65
—
—
—
—
—
24
24
37
23
0.35
1.35
250
2.0
100
38
—
—
—
0.65
2.00
400
—
µA
mA
mA
mA
V
V
V
µA
V
Parameter
Stand-by Supply Voltage
Supply Voltage
High level
Low level
Symbol
I
CC0
I
CC1
I
CC2
I
CC3
V
OH
V
OL
V
SAT
I
IH
V
F
Conditions
V
CC
= +24 V, V
IA
= V
IB
= 0 V
I
O
= 0 mA
I
O
= 500 mA
I
O
= 0 mA, V
IA
= V
IB
= +2.4 V
I
O
= 500 mA
I
O
= 500 mA
I
O
= 500 mA
V
IN
= +2.4 V
I
O
= 1.2 A
Output Voltage
Saturated Output Voltage
Input Current
Surge Absorption Diode Voltage
in Forward Direction
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MB3863
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OPERATIONS
1. Forward and Reverse
Switching control mode A or B pairs Q2 and Q3, or Q1 and Q4, respectively, while reversing the supply current
to the motor for each switching. When Q2 and Q3 are in use, B-OUT and A-OUT are High level and Low level,
respectively. In this case, current flows B-OUT→ motor
→
A-OUT, causing forward operation as described in
the table below.
When Q1 and Q4 are in use, current flows in the reverse direction to the above flow, causing reverse motor
operation.
2. Brake
Control mode C operates Q2 and Q4 while stopping Q1 and Q3.
Since A-OUT and B-OUT are held at Low level, both poles of the motor are short-circuited and the motor is
stopped.
3. Stand-by
Control mode D turns Q1 to Q4 OFF and the motor has no current flow.
In this mode, the power supply current is less than 100
µA.
Mode
A
B
C
D
Input mode*
A=IN
1
0
1
0
B=IN
0
1
1
0
Operation state of output transistor
Q1
OFF
ON
OFF
OFF
Q2
ON
OFF
ON
OFF
Q3
ON
OFF
OFF
OFF
Q4
OFF
ON
ON
OFF
State of output pin
A-OUT
L
H
L
—
B-OUT
H
L
L
—
Output operation mode
Forward (Reverse)
Reverse (Forward)
Brake
Open (High impedance)
* : Input mode:1: +2.4 V Min.
0: +0.4 V Max.
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