715

Motor driver ICs

BA6811F / BA6813F

FCircuit operation

The BA6811F and BA6813F have motor lock detection

and automatic restart circuits. The timing of lock detec-

tion and automatic restart is determined by the external

capacitor connected to the LD pin. The charge time of the

external capacitor is given by :

(Typical value)

where

(1.93V),

(0.76V),

(2.9

µA),

(0.52

µA),

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

For C=1

µF, for example, the charge (output ON) and dis-

charge (output OFF) times are 0.40s and 2.25s, respec-

tively.

The timing chart for an occasion of motor locking is

shown in Fig. 1.

C

C