MB3863_01 Datasheet, PDF (5/12 Pages) Fujitsu Component Limited. – DUAL REVERSIBLE MOTOR DRIVER

MB3863
s 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.
Input mode* Operation state of output transistor State of output pin
Mode
Output operation mode
A=IN B=IN Q1
Q2
Q3
Q4 A-OUT B-OUT
A
1
0
OFF
ON
ON
OFF
L
H Forward (Reverse)
B
0
1
ON
OFF OFF
ON
H
L Reverse (Forward)
C
1
1
OFF
ON
OFF
ON
L
L Brake
D
0
0
OFF
OFF
OFF
OFF
—
— Open (High impedance)
* : Input mode:1: +2.4 V Min.
0: +0.4 V Max.
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