AMC5902 查看數據表（PDF） - Unspecified

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AMC5902

6CH Motor Driver for CD-ROM, DVD-ROM

Unspecified 

AMC DOC. #: AMC5902_B

March 2004

AMC5902

6CH Motor Driver for

CD-ROM, DVD-ROM

APPLICATION INFORMATION

Spindle channel

The spindle motor torque is controlled by the differential voltage of SPIN and VREF. The voltage gain, AV_SP ,

is 1.0(V/V).

The limitation function starts to take effect when the differential voltage of VCC1 and CSSP is over 0.47V.

Current gain is equal to AV_SP / RSP.

Slide channel

The slide motor torque is controlled by the differential voltage of IN1SL (IN2SL) and VREF. The voltage gain, AV_SL ,

is 0.5(V/V).

The limitation function starts to take effect when the differential voltage of VCC3-CS1(CS2) is over 0.47V.

Current gain is equal to AV_SL / RSL.

Reverse

Iop

VO4/RsL

VO1/RsL

VO3/RsL VO2/RsL

Forward

Iosp

IOSL

Iop

Iosp or IOSL

VI4

VI3

Current gain

VI2

VI1

CNTL-VREF (V)

Dead zone

Spindle driver

VI1=150mV, VI2=110mV,

VI4=-150mV, VI3=-110mV

Gm(+)=(VO1-VO2)/(150-110)/0.33

Gm(-)=(VO4 -VO3)/(150-110)/0.33

Iop..the peak current of Iosp or IoSL

Slide driver

VI1=250mV, VI2=130mV,

VI4=-250mV, VI3=-130mV

Gm(+)=(VO1-VO2)/(250-130)/0.5

Gm(-)=(VO4 -VO3)/(250-130)/0.5

Gain expression

Input-output gain Gm(A/V)

Output-limit current

Gain with the added resistor Gm(A/V)

Spindle

1.0/Rsp

0.47/Rsp

15k/[(R1+15k)xRSP]

Slide

0.5/RsL

0.47/RsL

0.5x15k/[(R1+47k)xRSL]

VCC1

VCC2

CNTL

RSP

CSSP HB

HU+

R1

SPIN

HU-

HV+

HV-

HW+

HW-

U

V

PGND1,2 W

Copyright  2003, 2004 ADD Microtech Corp

VCC3

CNTL

RSL

CS1

(CS2)

R1 IN1SL SO1+

(IN2SL) (SO2+)

SO1-

(SO2-)

GND

8

Forward

M

Reverse

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