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BD7931F Datasheet(PDF) 5 Page - Rohm

Part # BD7931F
Description  0.5A or Less Reversible Motor Drivers (Single Moter)
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD7931F Datasheet(HTML) 5 Page - Rohm

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BH6578FVM,BD7931F
Technical Note
5/8
www.rohm.com
2011.05 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Interfaces
BH6578FVM
BD7931F
Fig.14
Fig.17
Fig.15
Fig.16
Fig.18
Fig.19
Operations
(1) CONTROL LOGIC
Operation of each mode is carried out as follows:
When INFWD is “H” and INREV is “L,” the normal rotation mode is achieved and current flows from OUT
+ to OUT-.
When both INFWD and INREV are “H,” the brake mode is achieved. Operation in such event is described as follows:
the top-side transistor turns OFF to stop supplying motor drive current, the bottom-side transistor turns ON to absorb
reverse EMF of motor and applies brake to motor. When both INFWD and INREV are “L,” OUT
+ and OUT- potentials
become open and the motor stops.
(2) LOADING CONT
Controlling the output voltage can vary voltage applied to the motor and can control the motor speed. By the voltage
entered to the CONT terminal, the output H voltage can be controlled (gain 6dB Typ.). Even if the voltage entered is
increased more than necessary (Vcc Max), the output voltage never exceeds the power supply voltage.
LDCONT
OUT+/OUT-
FIN/RIN
LDCONT
OUT+/OUT-
INFWD/INREV
50KΩ
50KΩ
200KΩ
7
8
50KΩ
50KΩ
50KΩ
50KΩ
200KΩ
7
8
VCC
VCC
6
10KΩ
49.6KΩ
VCC
6
39KΩ
10KΩ
2
3
VCC
2
3
VCC


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