HA13568AT Hitachi Semiconductor, HA13568AT Datasheet - Page 18

• Manufacturer Part Number: HA13568AT
• Description: CD-ROM Combo Driver
• Manufacturer: Hitachi Semiconductor

HA13568AT
Note:
18
1. The output saturation voltage is the sum of the upper and lower saturation voltages.
2. See figure 1. Where,
3. Where,
4. See figure 2. Where,
5. The circuit operates in soft switching drive mode only when the control input (Vctl) is lower than
6. PHASE is output only when B-EMF exceeds the threshold voltage.
Gctl = 20 log
Vqfcs =
Vqtrr =
Gvfcs = 20 log
Gvtrr = 20 log
f
CT2
and f
Vtrrp + Vtrrn
Vfcsp + Vfcsn
PHASE
2
is higher than the threshold voltage. See figure 3.
2
Vrnf
Vctl
Vtrrin
Vtrrp
Vfcsin
Vfcsp
Vtrrin
Vtrrn
Vfcsin
Vfcsn
Figure 1
Figure 2
Figure 3
Vspncl
f
CT2
0
0
0
Reverse brake Short brake
SOFT SW mode
Reverse
SW mode
torque
Vdzspn
Vref
Vref
( Vtrrin)
Vfcsin
0.5V
Forward
torque
Vfcsin (Vtrrin)
SW mode
( Vtrrp)
Vctl
V
Vfcsp
CTL
Vctl (V)
Vrnf
REFIN