HA13631T Datasheet, PDF (6/20 Pages) Hitachi Semiconductor – CD-ROM Combo Driver

HA13631T
Timing Chart
1. Start-up
EN
EXTCOM
COMM
H
L
H
L
T2 T4
T1 T3 T5 T6 T7 T8
T9
T10
Tmext
H
L
Vspn
Output voltage
(U phase)
0
PWM
PWM
Vspn
Output voltage
(V phase)
0
PWM
PWM
Vspn
Output voltage
(W phase)
0
PWM
+
Output current
(U phase)
0
−
+
Output current
(V phase)
0
−
+
Output current
(W phase)
0
−
FGOUT
H
L
Mute
(B-EMF detection)
Notes: 1. T1 to T10, and Tmext are set by CPU.
2. B-EMF sensing is masked while COMM = H.
Also, when EXTCOM = H, B-EMF sensing is masked during the period from T1 to T6.
6