BD6220F 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD6220F

H-bridge Drivers for Brush Motors 18V max. H-bridge Drivers

ROHM Semiconductor 

BD622□ Series

Technical Note

d) Over current protection (OCP) circuit

To protect this driver IC from ground faults, power supply line faults and load short circuits, the OCP circuit monitors

the output current for the circuit’s monitoring time (10µs, nominal). When the protection circuit detects an over

current, the controller forces all driver outputs to high impedance during the off time (290µs, nominal). The IC returns

to normal operation after the off time period has elapsed (self-returning type). At the two channels type, this circuit

works independently for each channel.

Threshold

Iout

0

CTRL Input

Internal status

ON

OFF

ON

Monitor / Timer

mon.

off timer

Fig.41 Over current protection (timing chart)

●Interfaces

VCC

FIN

RIN

100k

100k

VCC

10k

VREF

Fig.42 FIN / RIN

Fig.43 VREF

VCC

OUT1

OUT2

GND

Fig.44 OUT1 / OUT2

(SOP8/HRP7)

VCC

OUT1

OUT2

RNF

GND

Fig.45 OUT1 / OUT2

(HSOP25/HSOPM28)

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© 2010 ROHM Co., Ltd. All rights reserved.

11/15

2010.07 - Rev.D

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