BA6406F ROHM Electronics, BA6406F Datasheet - Page 3

• Manufacturer Part Number: BA6406F
• Manufacturer: ROHM Electronics

FLock detection
The automatic restart circuit detects a motor lock condi-
tion and automatically turns off the output current. When
the lock condition is cleared, the IC automatically restarts
and allow the motor to run.
In the BA6406F, automatic restart is performed in the fol-
lowing manner. A motor lock condition is detected when
Output ON time (t
the pin6 capacitor
where
t
t
Motor driver ICs
ON
OFF
=
=
C S (V
C S (V
6CL
6CL
I
I
ON
6C
6d
*V
*V
) and OFF time (t
6CP
6CP
)
)
(sec)
(sec)
OFF
) determined by
the Hall signal stops switching. The output is ON when
pin 6 is being charged, and OFF when pin 6 is being dis-
charged. Pin 3 is ON during normal operation, and OFF
when the motor is locked. Pin 3 is an open collector out-
put.
C is the capacitance of the pin-6 external capacitor
V
V
I
I
6C
6d
6CL
6CP
is the pin6 discharge current
is the pin6 charge current
is the pin6 clamp voltage
is the pin6 comparator voltage
BA6406F
697