HA13631T Datasheet, PDF (7/20 Pages) Hitachi Semiconductor – CD-ROM Combo Driver

2. Acceleration
H
EXTCOM
L
Reverse start-up ⁺
U
V
W
voltage
0
B-EMF
−
Tmint
H
FGOUT
L
COMM
Tmext
H
L
HA13631T
Vspn
Output voltage
(U phase)
0
PWM
PWM
Vspn
Output voltage
(V phase)
PWM
0
PWM
PWM
Vspn
Output voltage
(W phase)
0
PWM
PWM
+
Output current
(U phase)
0
−
+
Output current
(V phase)
0
−
+
Output current
(W phase)
0
−
Note: 1. B-EMF sensing is masked while COMM = H (= Tmext) or FGOUT = H (= Tmint).
Tmext is set by the CPU.
7