702

Motor driver ICs

BA6407AF

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 BA6407AF, automatic restart is performed as fol-

lows.

A motor lock condition is detected when the Hall signal

stops switching.

The output is ON when the LD pin is being charged, and

OFF when the pin is being discharged.

S The AL pin is ON during normal operation, and OFF

when the motor is locked.

S The AL pin is an open collector output.

the LD capacitor

where

C is the capacitance of the LD-pin external capacitor,

µA),

µA).

C

C

(Typical value)