HA13631T 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HA13631T

CD-ROM Combo Driver

Hitachi -> Renesas Electronics 

HA13631T

External Components

Parts No.

Reccomended Reccomended

Value

Range

Purpose

Note

R101a~d

2.4 kΩ

≤ 22 kΩ

Filter resistor and atenuation for B-EMF

1

R102a~d

7.5 kΩ

≤ 22 kΩ

Filter resistor and atenuation for B-EMF

1

R103, R104 —

≤ 220 kΩ

for FCS driver gain setting

R105, R106 —

≤ 220 kΩ

for TRK driver gain setting

R107, R108 —

≤ 220 kΩ

for SLD driver gain setting

R109, R110 —

≤ 220 kΩ

for TRY driver gain setting

5

Rnf

0.25 Ω

≥ 0.25 Ω

SPN driver current detection resistor

2

Rt

6.8 kΩ

≥ 5 kΩ

Reference current setting

C101

—

≥ 0.1 µF

for Power supply by passing

C102

0.1 µF

—

for Booster pumping

C103

0.47 µF

—

for Booster output smoothing

C104

2200 pF

—

for PWM carrier oscillation DC level adjustment

C105a~d

0.1 µF

—

for B-EMF filter

1

Ct1

100 pF

—

Time constant for CLK oscillation

3, 4

Ct2

400 pF

—

PWM carrier generation time constant

3, 4

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

≥

1

4

(at Vspn = 5 V)

C105x =

11

Nomax P

1

R101x

+

1

R102x

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.

fclk

=

2

Ct1

Rt

Vrt

(Vct1h

−

Vct1l)

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)

11

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