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AMC DOC. #: AMC5902_B
AMC5902
March 2004
Copyright
2003, 2004 ADD Microtech Corp
9
www.addmtek.com
6CH Motor Driver for
CD-ROM, DVD-ROM
APPLICATION INFORMATION (continued)
Loading control
The loading output voltage is set internally to be 7.5 × (LDIN-VREF).
With LDIN is higher/ equal/ lower to VREF,the motor can be set to Forward/ Short brake/ Reverse functions..
Focus / tracking channel
The focus and tracking output voltage is set internally to be 7.5 × (FOIN-VREF).
With FOIN (TKIN) is higher/ equal/ lower to VREF, the motor can be set to Forward/ Short brake/ Reverse function.
Gain expression
Gain with the added resistor Av(V/V)
Loading (LO+
- LO-)
7.5x 47k/(R1+47k)
Focus (FO+
- FO-)
7.5x 47k/(R1+47k)
Tracking (TKO+
- TKO-)
7.5x 47k/(R1+47k)
Loading
Channel
VCC4
LDIN
LDO+
LDO-
M
Forward
Reverse
Load input
Focus
Channel
VCC5
FOIN
FO+
FO-
Forward
Reverse
Focus input
R1
R1
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