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參數(shù)資料
| 型號： | HA13631T |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | CD-ROM Combo Driver |
| 中文描述： | 光盤驅(qū)動器組合 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 86K |
| 代理商： | HA13631T |
HA13631T
11
External Components
Parts No.
Reccomended
Value
Reccomended
Range
Purpose
Note
R101a~d
2.4 k
7.5 k
≤
22 k
≤
22 k
≤
220 k
≤
220 k
≤
220 k
≤
220 k
≥
0.25
≥
5 k
≥
0.1
μ
F
Filter resistor and atenuation for B-EMF
1
R102a~d
Filter resistor and atenuation for B-EMF
1
R103, R104
—
for FCS driver gain setting
R105, R106
—
for TRK driver gain setting
R107, R108
—
for SLD driver gain setting
R109, R110
—
for TRY driver gain setting
5
Rnf
0.25
6.8 k
SPN driver current detection resistor
2
Rt
Reference current setting
C101
—
for Power supply by passing
C102
0.1
μ
F
0.47
μ
F
—
for Booster pumping
C103
—
for Booster output smoothing
C104
2200 pF
—
for PWM carrier oscillation DC level adjustment
C105a~d
0.1
μ
F
—
for B-EMF filter
1
Ct1
100 pF
—
Time constant for CLK oscillation
3, 4
Ct2
Notes: 1. The values of R101a~d, R102a~d, and C105a~d are determined by the following equation.
Where, Nomax : Maximum rotation speed (rpm)
P
: Number of spindle motor poles (Total number of S poles and N poles)
R101
R102
4
11
Nomax P
R101x
R102x
400 pF
—
PWM carrier generation time constant
3, 4
1
≥
(at Vspn = 5 V)
1
1
C105x =
+
2. The output current maximum value Iospnmax of SPN driver is controlled according to the
following equation. However, Vspncl is the current limiter reference voltage. (See the electrical
characteristics)
Iospnmax =Vspncl
Rnf
3. The CLK oscillation frequency fclk and Rt1
Ct1 are related by the following equation.
Vrt
2 Ct1 Rt (Vct1h
Vct1l)
fclk =
Where, Vrt
: RT pin voltage (See the electrical characteristics)
Vct1h : CT1 pin high voltage (See the electrical characteristics)
Vct1l : CT1 pin low voltage (See the electrical characteristics)
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