HA13631T Hitachi Semiconductor, HA13631T Datasheet - Page 11

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

External Components
Parts No.
R101a~d
R102a~d
R103, R104
R105, R106
R107, R108
R109, R110
Rnf
Rt
C101
C102
C103
C104
C105a~d
Ct1
Ct2
Notes: 1. The values of R101a~d, R102a~d, and C105a~d are determined by the following equation.
2. The output current maximum value Iospnmax of SPN driver is controlled according to the
3. The CLK oscillation frequency fclk and Rt1 Ct1 are related by the following equation.
Where, Nomax : Maximum rotation speed (rpm)
Where, Vrt
following equation. However, Vspncl is the current limiter reference voltage. (See the electrical
characteristics)
R101
R102
C105x =
fclk =
fclk =
Iospnmax =
Reccomended
Value
2.4 k
7.5 k
—
—
—
—
0.25
6.8 k
—
0.1 F
0.47 F
2200 pF
0.1 F
100 pF
400 pF
2 Ct1 Rt (Vct1h
P
Vct1h : CT1 pin high voltage (See the electrical characteristics)
Vct1l : CT1 pin low voltage (See the electrical characteristics)
1
4
Nomax P
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Vspncl
(at Vspn = 5 V)
Rnf
: RT pin voltage (See the electrical characteristics)
: Number of spindle motor poles (Total number of S poles and N poles)
Vrt
R101x
Reccomended
Range
—
—
—
—
—
—
22 k
22 k
220 k
220 k
220 k
220 k
0.25
5 k
0.1 F
1
Vct1l)
+
R102x
1
Purpose
Filter resistor and atenuation for B-EMF
Filter resistor and atenuation for B-EMF
for FCS driver gain setting
for TRK driver gain setting
for SLD driver gain setting
for TRY driver gain setting
SPN driver current detection resistor
Reference current setting
for Power supply by passing
for Booster pumping
for Booster output smoothing
for PWM carrier oscillation DC level adjustment
for B-EMF filter
Time constant for CLK oscillation
PWM carrier generation time constant
HA13631T
Note
1
1
5
2
1
3, 4
3, 4
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