BA6852 Rohm, BA6852 Datasheet - Page 13

• Manufacturer Part Number: BA6852
• Description: Spindle and loading motor driver for PD
• Manufacturer: Rohm

(2)
The power save pin logic is as follows.
(3)
The construction of the reverse rotation detector circuit
is shown in Fig. 17.
804
Motor driver ICs
Power save
Reverse rotation detector
Motor operation during reverse detection
When E
When E
When the motor reverses, the reverse rotation detector operates, and the coil output is opened.
Free rotation in the reverse direction by inertia.
Stop
C
C
< E
> E
CR
CR
, forward rotation (right rotation)
, reverse torque is applied to reduce speed (right rotation)
(1) Forward (E
The phase relationship between the hall input sig-
nals H
verse rotation detector circuit does not operate.
(2) Reverse (E
The phase relationship between H
opposite to that for forward rotation, and the re-
verse rotation detector circuit operates to switch the
output off and leave it in the open state.
2
)
and H
C
3
C
)
< E
> E
is as shown in Fig.18, and the re-
CR
CR
)
)
BA6852FP
2
)
and H
3
)
is