BA6908F

Motor driver ICs

6/7

3)

Hall signal input terminals (H

+, H−)

Fig.7 Hall amp input bias voltage range.

GND

A.

Please adjust hall input bias voltage by value of resistor for hall element, so that hall signal contains amplitude

input within rang from 0V to Vcc-2V. At this time, to set hall amp input bias voltage for Vcc/2 is recommended.

B.

Please be careful of input signal because hall amp of this IC doesn’t have input hysteresis.

C.

The output signal of this IC is the amplified hall input signal. Therefore, the output signal depends on hall input

signal. When the amplitude of hall signal is small, the output signal becomes gentle. Oppositely, when the

amplitude is big, the output signal becomes steep. The hall-input/output gain is about 500 times (TYP), so

please input the hall signal that is suitable to make adequate amplitude of the output signal.

Fig.8 Difference of output signal depending on hall input signal

(H

+)−(H−)

OUT1

4)

ASO

Please consider output transistors not to exceed absolute maximum ratings and ASO.

5)

GND

Please keep up the voltage of GND less than the voltage of another terminal surely.

6)

This product is produced with strict quality control, but destroyed in using beyond absolute maximum ratings.

Once IC destroyed, a failure mode cannot be defined (like short-mode or open-mode). Therefore, physical security

counter measure like fuse is to be given when a specific mode to be beyond absolute maximum ratings is

considered.