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| 型号： | BD6231F-E2F8 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 1 A, PDSO8 |
| 封装： | ROHS COMPLIANT, SOP-8 |
| 文件页数： | 2/17页 |
| 文件大小： | 383K |
| 代理商： | BD6231F-E2F8 |
Technical Note
10/16
BD6230, BD6231, BD6232, BD6235, BD6236, BD6237
www.rohm.com
2009.08 - Rev.C
○
c
2009 ROHM Co., Ltd. All rights reserved.
e) f) PWM control mode A
The rotational speed of the motor can be controlled by the switching duty when the PWM signal is input to the FIN
pin or the RIN pin. In this mode, the high side output is fixed and the low side output does the switching,
corresponding to the input signal. The switching operates by the output state toggling between "L" and "Hi-Z".
The PWM frequency can be input in the range between 20kHz and 100kHz. Note that control may not be attained
by switching on duty at frequencies lower than 20kHz, since the operation functions via the stand-by mode. Also,
circuit operation may not respond correctly when the input signal is higher than 100kHz. To operate in this mode,
connect the VREF pin with VCC pin. In addition, establish a current path for the recovery current from the motor, by
connecting a bypass capacitor (10F or more is recommended) between VCC and ground.
Control input : H
Control input : L
Fig.38 PWM control mode A operation (output stage)
Fig.39 PWM control mode A operation (timing chart)
g) h) PWM control mode B
The rotational speed of the motor can be controlled by the switching duty when the PWM signal is input to the FIN
pin or the RIN pin. In this mode, the low side output is fixed and the high side output does the switching,
corresponding to the input signal. The switching operates by the output state toggling between "L" and "H".
The PWM frequency can be input in the range between 20kHz and 100kHz. Also, circuit operation may not respond
correctly when the input signal is higher than 100kHz. To operate in this mode, connect the VREF pin with VCC pin.
In addition, establish a current path for the recovery current from the motor, by connecting a bypass capacitor (10F
or more is recommended) between VCC and ground.
Control input : H
Control input : L
Fig.40 PWM control mode B operation (output stage)
Fig.41 PWM control mode B operation (timing chart)
M
ON
OFF
ON
M
ON
OFF
FIN
RIN
OUT1
OUT2
M
OFF
ON
OFF
ON
M
ON
OFF
ON
FIN
RIN
OUT1
OUT2
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