BD6237FM-E2 Rohm Semiconductor, BD6237FM-E2 Datasheet - Page 10

• Manufacturer Part Number: BD6237FM-E2
• Description: IC H-BRIDGE DRIVER 28HSOP
• Manufacturer: Rohm Semiconductor

Specifications of BD6237FM-E2

• Applications: DC Motor Driver, H Bridge
• Number Of Outputs: 2
• Current - Output: 2A
• Voltage - Supply: 6 V ~ 32 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-HSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -

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BD6230, BD6231, BD6232, BD6235, BD6236, BD6237
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e) f) PWM control mode A
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 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 (10µF or more is recommended) between VCC and ground.
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 (10µF
or more is recommended) between VCC and ground.
OUT1
OUT2
OUT1
OUT2
RIN
RIN
FIN
FIN
OFF
OFF
ON
ON
Control input : H
Control input : H
Fig.40 PWM control mode B operation (output stage)
Fig.38 PWM control mode A operation (output stage)
Fig.41 PWM control mode B operation (timing chart)
Fig.39 PWM control mode A operation (timing chart)
M
M
OFF
ON
OFF
ON
10/16
OFF
OFF
ON
ON
Control input : L
Control input : L
M
M
OFF
OFF
OFF
ON
2009.08 - Rev.C
Technical Note