AMC5902 Datasheet, PDF (8/14 Pages) List of Unclassifed Manufacturers – 6CH Motor Driver for CD-ROM, DVD-ROM

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, A_{V_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 A_{V_SP} / R_SP.
Slide channel
The slide motor torque is controlled by the differential voltage of IN1SL (IN2SL) and VREF. The voltage gain, A_{V_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 A_{V_SL} / R_SL.
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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