HA13631T Hitachi Semiconductor, HA13631T Datasheet - Page 6

• Manufacturer Part Number: HA13631T
• Description: CD-ROM Combo Driver
• Manufacturer: Hitachi Semiconductor

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