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參數(shù)資料
| 型號： | BD6231F-E2F8 |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 1 A, PDSO8 |
| 封裝： | ROHS COMPLIANT, SOP-8 |
| 文件頁數(shù)： | 17/17頁 |
| 文件大小： | 383K |
| 代理商： | BD6231F-E2F8 |
Technical Note
9/16
BD6230, BD6231, BD6232, BD6235, BD6236, BD6237
www.rohm.com
2009.08 - Rev.C
○
c
2009 ROHM Co., Ltd. All rights reserved.
Functional descriptions
1) Operation modes
a) Stand-by mode
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
50s before shutting down all circuits.
b) Forward mode
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.
c) Reverse mode
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.
d) Brake mode
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) Stand-by mode
b) Forward mode
c) Reverse mode
d) Brake mode
Fig.37 Four basic operations (output stage)
Table 7 Logic table
FIN
RIN
VREF
OUT1
OUT2
Operation
a
L
X
Hi-Z*
Stand-by (idling)
b
H
L
VCC
H
L
Forward (OUT1 > OUT2)
c
L
H
VCC
L
H
Reverse (OUT1 < OUT2)
d
H
X
L
Brake (stop)
e
PWM
L
VCC
H
PWM
__________
Forward (PWM control mode A)
f
L
PWM
VCC
PWM
__________
H
Reverse (PWM control mode A)
g
H
PWM
VCC
PWM
__________
L
Forward (PWM control mode B)
h
PWM
H
VCC
L
PWM
__________
Reverse (PWM control mode B)
i
H
L
Option
H
PWM
__________
Forward (VREF control)
j
L
H
Option
PWM
__________
H
Reverse (VREF control)
* 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
M
ON
OFF
ON
M
OFF
ON
OFF
M
OFF
ON
OFF
ON
OFF
M
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