HA13614 データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

コンポーネント説明

メーカー

HA13614

Combo (Spindle & VCM) Driver

Hitachi -> Renesas Electronics 

HA13614FH

C3 = 220 ⋅ 10−12

[F]

(5)

C2 =

1

2

⋅

4⋅k+1− 8⋅k+1

k2

⋅ C3

[F]

(6)

R2 =

k

⋅

2

[Ω]

4 ⋅ k + 1 − 8 ⋅ k + 1 2 ⋅ π ⋅ fc ⋅ C3

(7)

R3 = R2

[Ω]

(8)

k = R5 = 0.604

R4

(9)

where, f c

: Cut off frequency of 3rd order LPF [Hz]

R1

: Output resistance of PWMDAC [Ω] (refer to Electrical Characteristics)

4. The driving current of VCM Ivcm is determined by following equation.

Ivcm

=

Vvcmin − VREF

RS

⋅

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.

R104 = 12π ⋅ BW1 ⋅ Lvcm

RS

[kΩ]

(11)

C108 =

Lvcm

RS + RL

⋅

1

R104

[F]

(12)

where, RL

: Coil resistance of VCM [Ω]

Lvcm : Coil inductance of VCM [H]

6. Retract current Iret is determined by following equation.

Iret =

0.7 ×

1+

R105

R106

− Vretsat

[A]

RS + RL

(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.

Ispn =

Vref − Voff1

Rnf

⋅ duty

[A]

(14)

Vref

Voff1

: 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)

18

Share Link: