HA13558AFH Hitachi, HA13558AFH Datasheet - Page 10

• Manufacturer Part Number: HA13558AFH
• Description: CD-ROM Combo Driver
• Manufacturer: Hitachi

HA13558AFH
External Components
Parts No.
R102, R103
R104
Rnf
Rref
Rs
C102
C103
C104
C105
C106
Ccom
Cclk
Csld
Notes: 1. The SPN driver maximum output current is determined by the following formula. Here, Vspncl is
10
2. Determine this value using the following formula as a guideline.
Tcom =
Ccom =
where, J
the current limiter reference voltage. (See the electrical characteristics table.)
Iospnmax =
Recommended
Value
—
—
0.47
3.3k
0.47
0.1 F
0.1 F
0.1 F
0.47 F
—
—
47pF
680pF
P
Kt : Spindle motor torque constant [kg · cm / A]
1
8
16 • Rref • Vthcom
vthcom : Potential difference between the upper and lower Vth in the startup circuit
: Spindle inertia [kg · cm · s
: Number of spindle motor poles [poles]
Vspncl
Tcom • Vr1
Rnf
P • Kt • Ispnmax
( Vthcom
J
Recommended
range
—
—
0.27
3.3k
0.27
1.5V)
1
4
2
]
Purpose
for Amplitude detection voltage setting
for Amplitude detection filter
SPN driver current detection resistor
for Reference current setting
SLD driver current detection resistor
for Phase compensation for SPN driver
current control
for B-EMF amplitude AGC
for Booster pomping
for Booster output smoothing
for Amplitude detection filter
for Start-up oscillation
for CLK oscillation
for Slide control offtime determining time
constant
P • Kt • Ispnmax
J
Note
1
2 to 4
5
2
3
4