MB3853 Datasheet, PDF (4/14 Pages) Fujitsu Component Limited. – 1A Motor Drive IC for Motor Applications

MB3853
s FUNCTIONAL DESCRIPTION
The MB3853 provides two methods for controlling motors. The IC can be connected to two motors and drive
each motor independently, or connected to one motor in an H-type connection and drive the motor in forward
and reverse directions.
1. Sample connection to 2 motors for run-stop control.
(1) Connection diagram
INH 7
IN1 2
IN2 3
VCC1
1
Power supply
circuit
Control circuit
Control circuit
Protective
circuits
100 µF ^*1
−+
VCC2
8
SW1
SW2
SW3
SW4
6
OUT1
*2
4
OUT2
*2
9
MONITOR
5
GND
M2
M3
Run-stop
control
M2′
M3′
Run-stop
control
*1 : The capacitor should be placed close to the IC terminal.
*2 : When using the M2’ and M3’ terminals, ensure that the OUT1 terminal (pin 6) voltage and
OUT2 terminal (pin 4) voltage do not fall below −0.3 V by connecting the OUT1 and OUT2
terminals to ground through a Shottky barrier diode.
(2) Table of Functions
Mode
Input voltage level
INH
IN1
IN2
Inhibit mode
“L”
×
×
Mode (1)
“L”
“L”
Mode (2)
Mode (3)
“L”
“H”
“H”
“H”
“L”
Mode (4)
“H”
“H”
× _{: May be either “H” or “L” level}
Output terminals
OUT1 OUT2
OFF
(high impedance)
“H”
“H”
“H”
“L”
“L”
“H”
“L”
“L”
Motor operating mode
M2
M3
M2’
M3’
Continuous operation
Brake
Brake
Run
Run
Brake
Run
Brake
Run
Run
Run
Brake
Brake
Run
Brake
Run
Brake
4