參數(shù)資料
型號(hào)： HA13614
廠商： Hitachi,Ltd.
英文描述： Combo (Spindle & VCM) Driver
中文描述： 組合（主軸
文件頁(yè)數(shù)： 18/26頁(yè)
文件大小： 122K
代理商： HA13614
HA13614FH
18
C3 = 220
10
12
[F]
(5)
C2 =
C3
[F]
1
2
4
k + 1
8
k + 1
k
2
(6)
R2 =
[
]
k
4
k + 1
8
k + 1
2
2
π
fc
C3
(7)
R3 = R2
[
]
(8)
k =
= 0.604
R5
R4
(9)
where, fc
: Cut off frequency of 3rd order LPF [Hz]
: Output resistance of PWMDAC [
] (refer to Electrical Characteristics)
4. The driving current of VCM Ivcm is determined by following equation.
Vvcmin
VREF
R
S
R1
Ivcm =
Gvcm
[A]
(10)
where, Vvcmin : Input voltage on terminal VCMIN (pin 10) [V]
Gvcm
: Transfer function of VCM driver [dB] (refer to Electrical Characteristics)
5. Capacitor C108 and resistor R104 are useful to dump the gain peaking of VCM driver. These
components also determine the gain band width of VCM driver BW1 which should be chosen less
than 10 kHz, as follows.
12
π
BW1
Lvcm
R
S
R104 =
[k
]
(11)
C108 =
[F]
Lvcm
R
S
+ R
L
1
R104
(12)
where, R
L
: Coil resistance of VCM [
]
: Coil inductance of VCM [H]
Lvcm
6. Retract current Iret is determined by following equation.
R105
R106
Iret =
R
S
+ R
L
0.7
×
1 +
Vretsat
[A]
(13)
Vretsat : Output saturation voltage of retract driver [V]
(refer to Electrical Characteristics)
7. The relation between duty of input signal on terminal SPCNTL (pin 34) and output current of
spindle motor driver Ispn is as follows.
Vref
Voff1
Rnf
Ispn =
duty
[A]
(14)
Vref
: Reference voltage of current control amplifier [V]
Vref = Vref2 (@SPNGAIN = 1)
Vref = Vref3 (@SPNGAIN = 0)
: Offset voltage of current control amplifier [V]
(refer to Electrical Characteristics)
Voff1
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參數(shù)描述
HA13614FH 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Combo (Spindle & VCM) Driver
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