KA3016D 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA3016D

SPINDLE MOTOR DRIVER

Fairchild Semiconductor 

KA3016D

CD-ROM PRODUCTS

ELECTRICAL CHARATERISTICS (Continued)

(Unless otherwise specified, Ta=25°C, VCC=5V, VM=12V)

Characteristics

FG SELECTION

3X frequency selection

1X frequency selection

SHORT BRAKE

On voltage range

Off voltage range

Symbol

Test conditions

VFG3X

VFG1X

FGS > 2.5V

FGS < 1.0

VSBON

−

VSBOFF

−

Min. Typ. Max. Unit

2.5

−

VCC

V

−

−

1.0

V

2.5

−

VCC

V

0

−

1.0

V

CALCUALTION OF GAIN & TORQUE LIMIT CURRENT

VM

EC

ECR

+

Gm

−

Current / Voltage

Convertor

−

Vin

+

Absolute

Values

Negative

Feedback loop

R1

−

+ Driver

+

+

Vmax

−

VM

Max. output current limiting

0.255 which is made from GM times R1 is fixed value within IC.

Gain = -0---.-2---5---5--

RS

Vmax (see above block diagram) is setted to 350mV.

Itl[mA ] = V-----m----a----x- = 3---5---0----[--m-----V----]-

RS

RS

VM

IO

RS

−

VS

Output

Current sense

+

CS1 (Pin 28)

Power

Transistors

U IO

V

W

Commutation

Distributor

H1 H2 H3

6

MIC-99D001

January 1999

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