bd6232fp ROHM Co. Ltd., bd6232fp Datasheet - Page 9

• Manufacturer Part Number: bd6232fp
• Description: H-bridge Driver For Dc Brush Motor
• Manufacturer: ROHM Co. Ltd.

Functional descriptions
1) Operation modes
a) Stand-by mode
b) Forward mode
c) Reverse mode
d) Brake mode
* Hi-Z is the off state of all output transistors. Please note that this is the state of the connected diodes, which differs from that of the mechanical relay.
X : Don’t care
Stand-by operates independently of the VREF pin voltage. In stand-by mode, all internal circuits are turned off,
including the output power transistors. Motor output goes to high impedance. If the motor is running at the switch to
stand-by mode, the system enters an idling state because of the body diodes. However, when the system switches
to stand-by from any other mode (except the brake mode), the control logic remains in the high state for at least
50µs before shutting down all circuits.
This operating mode is defined as the forward rotation of the motor when the OUT1 pin is high and OUT2 pin is low.
When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT1 to OUT2. For
operation in this mode, connect the VREF pin with VCC pin.
This operating mode is defined as the reverse rotation of the motor when the OUT1 pin is low and OUT2 pin is high.
When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT2 to OUT1. For
operation in this mode, connect the VREF pin with VCC pin.
This operating mode is used to quickly stop the motor (short circuit brake). It differs from the stand-by mode
because the internal control circuit is operating in the brake mode. Please switch to the stand-by mode (rather than
the brake mode) to save power and reduce consumption.
a
b
d
e
g
h
OFF
OFF
c
f
a) Stand-by mode
PWM
FIN
H
H
H
L
L
L
L
M
PWM
RIN
H
H
H
L
L
L
L
OFF
OFF
OFF
Option
Option
ON
VREF
VCC
VCC
VCC
VCC
X
X
b) Forward mode
Fig.38 Four basic operations (output stage)
OUT1
________
________
M
PWM
PWM
Hi-Z*
H
H
H
L
L
Table 8 Logic table
9/16
OFF
ON
OUT2
________
________
PWM
PWM
Hi-Z*
H
H
H
L
L
OFF
ON
c) Reverse mode
Stand-by (idling)
Forward (OUT1 > OUT2)
Reverse (OUT1 < OUT2)
Brake (stop)
Forward (PWM control)
Reverse (PWM control)
Forward (VREF control)
Reverse (VREF control)
M
ON
OFF
Operation
OFF
ON
d) Brake mode
M
OFF
ON